Recursion in CreateChildControls

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  - 1
    - MonthCalendar - display problem when selecting a date range I am using VS 2005, .net Framework 2.0 When I select a range of dates, the selected dates are whited out except for 1/2 of the first and last date (these are highlighted in blue). This issue also occurs if I select a date and then use the year spinner button to go back a year. To track the issue, I started a new windows forms project, on the default form1 I added a monthcalendar, I have not changed any properties on the form or control. My theme set to default Windows XP. any ideas? Thanks -- Gord Tag: Recursion in CreateChildControls Tag: 98153
  - 2
    - Compare dataset values I built a windows services application which should run 24 X 7, and the system picks user defined parameter to perform scheduled work. My scheduler will pick users settings (dataset) from database to perform task; In order to keep my scheduler perform task when users setting changed, I create a thread timer to retrieve schedule settings from database and compare with my current running schedule task. If settings changed, (by comparing each row values), the scheduler will stop current processes and re-schedule new task. My question is, instead of comparing dataset by rows, is there any other better or efficient way, and how should it be? Tag: Recursion in CreateChildControls Tag: 98150
  - 3
    - Scrollbar problem with RichTextBox Hi, I don't know if this is a bug or is it just me not finding the solution? In VC# 2005 (running Windows2000) I have a multiline RichTextBox with ScrollBars set to "Both", but not forced. So I want to see no scrollbars at the beginning, and then, while filling up the Box with text, they should appear with a proportional thumb as usual. When deleting some text, the bars should disappear again. Well, instead of that, I get the following: As long as I don't resize the window, I can type in text without problems, but no scrollbars appear when arriving at the bottom or at the right. Only when I then resize the window (might be by only 2 mm), the scrollbars appear as they should, and from then on, everything works fine untill I close the app. But when I resize before reaching the margins, then dysfunctional scrollbars appear, with nonproportional thumbs, and the stay there until the text reaches the margins, for then to turn to normal scrollbars for the rest of the app's life. This behavior is independently for the horizontal and vertical scrollbar, each of them waiting text to come to its corresponding margin (right or bottom) before starting to work as it should, provided a resize has been done once. Quite annoying, what am I doing wrong? Thanks for any help Joe Tag: Recursion in CreateChildControls Tag: 98149
  - 4
    - TextBox AutoScale in VS 2005 designer I've recently moved to VS 2005 and .NET Framework 2.0 (from VS .NET 2003 and .NET Framework 1.1). And I have a trivial problem in designer: 1) I create a new project with default settings (C# Windows Application). OK. 2) And on the main form I put a TextBox. I set its width to 100 pixels. OK so far. 3) Now I change TextBox font to Courier New, 12pt, bold. OK. 4) I want to set the TextBox'es height to 24 pixels. And I can't. It sets its height back to 26 pixels. 5) So I want to change the property called AutoSize. TextBox inherits such a property from TextBoxBase. But it is TextBoxBase's property, not TextBox'es, so the property window doesn't show it. 6) So I modify the code generated by designer, I add a line: textbox.AutoSize = false; and change height to 24. OK, it works for a while. But when designer makes any changes to code, it removes the line above that I added and returns back to 26 pixels. Now what I can do is change the AutoSize property and Height somewhere else in code, where designer won't mess up. But: 1) It's not optimal to change the control's size twice: once when it is created with the size forced by designer, and then again change the size to what I want it to be 2) When I change it in code I lose the possibility to view visually how the final effect will be, because designer will show something different from what will be set during runtime. I want to layout controls in designer. I don't want to set all the sizes and positions at runtime in code without preview, because it's too much work with over 30 controls. And if I can't do it in designer, then VS 2005 is a useless tool. I can write code in notepad. 3) I had no such problem in .NET 1.1 and Visual Studio .NET 2003 4) I have no problem with other controls, such as Label, which has a property AutoSize on its own (not inherited) and I can change that property in designer's property window, and all works fine. Any ideas how can I turn off TextBox'es AutoSize property in designer? Thanks in advance, Agata Staniak Tag: Recursion in CreateChildControls Tag: 98147
  - 5
    - Trouble with BindingSource I've gone through a few demos and walkthroughs trying to become familiar with the new binding in vs2005. I'm having some success, but not every time. I've create a dataset with the datasource configuration wizard. I have 3 tables in this dataset (expense, category, and type). I drag each table onto a separate form. Visual studio creates a datagridview and binding navigator on each form. When executed, the grids on each form populate correctly. The problem is that one of the tables doesn't get updated when I press save, the other two save correctly. I'm not writing any code, just using the autogenerated code that VS writes: Private Sub ExpenseBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ExpenseBindingNavigatorSaveItem.Click Me.Validate() Me.ExpenseBindingSource.EndEdit() Me.ExpenseTableAdapter.Update(Me.ExpenseDataSet.expense) End Sub I can't figure out what is different about the expense table/grid that is causing it to not update. There are no errors generated. If I inspect the dataset in the debugger after I make changes in the grid, the dataset appears to get updated. I therefore believe it has something to do with the BindingSource or TableAdapter. The changes never make it from the dataset to the database (an access db). Joel Tag: Recursion in CreateChildControls Tag: 98146
  - 6
    - Catch Exception problem.... How to catch the windows exception that shows a window with the name of the executable program and a messege saying : "[Program] has encounterd a problem and needs to close. We are sorry for the inconvenience", and three buttons, "Debug", "Send Error Report" and "Don't Send", in a dotnet applicacion, if its posible, of course... Tag: Recursion in CreateChildControls Tag: 98142
  - 7
    - How to protect ADO.NET connection string under WindowsForms? Hello I build WindowsForm application, that use MS Access database. I wish to protect AccessDB password that I use in connection string. Application will be used by final users and customers. I understand that .NET framework application is easy to decompile and trace it's variables. So how to hide or protect connection string from easy disrupt, and reading DB password. Thanks MilanB Tag: Recursion in CreateChildControls Tag: 98137
  - 8
    - how ?? I want to run one perticular executable from Harddisk (installed lincenced application ) so there is entry of path where that application is installed NOW HOW CAN I LOCATE THAT PATH ??(USING VB.NET) Tag: Recursion in CreateChildControls Tag: 98135
  - 9
    - Error clicking List View Columns Headers (Application Verifier: He Hi All, Error while sorting ListView Items. While clicking the columns headers in ListView, an Access Violation Exception is thrown. Not always but sometimes. The Error was reported when testing the application using Application Verifier under Heap section... Thanks in Advance, Karthik Tag: Recursion in CreateChildControls Tag: 98133
  - 10
    - DatagridView only add rows no edit existing Hello I need a DatagridView with the option of read-only for existing record but that I can insert new records I try with this.dataGridView1.ReadOnly = false; this.dataGridView1.AllowUserToAddRows = true; this.dataGridView1.AllowUserToDeleteRows = false; but the problem is that the user can update existing records and I want only able to insert new ones. if I use this.dataGridView1.ReadOnly = true; the user have a new record but can edit the information a the new one Please I think the solution is very simple but I have invest a lot of time with different combinations without any positive result please help MajorTom Tag: Recursion in CreateChildControls Tag: 98131
  - 11
    - Cursor on ListView Hi I have a form in which there is a treeview alongside a listview. Now I have certain conditions when the Listview control is disabled. When this happens I would want the Cursor to be of type "NO" only when the mouse is over the ListView. It should be default over the other controls on the form. I have tried many things but nothing seems to work. I am able to set the Cursor to No when the Listview is disabled ...but the cursor does not change to default if I leave the Listview control... The mouse events dont seem to help either. Next I tried using the Cursor.draw(graphics, rectangle) method with the rectangle being the size of the Listview control. I thought this would limit the No cursor only within this rectangle. But Nope did not work! Even if i change the cursor property to anything else from the designer for the listview or even the form..it doesnt seem to work... what am i missing??????? appreciate all responses Thanks, Vinit Tag: Recursion in CreateChildControls Tag: 98130
  - 12
    - Print To File hangs when cancelled. When you cancel the status window when printing to a file, the status window hangs and cannot be closed ---you must go to the task manager to End the window session in order to close the window. This is a demonstrable problem in Net Framework 1.1 by using the code below. I could not find any solution to this problem in Knowledge Base. **** StringReader streamToPrint = new StringReader (textArea.Text); //Assumes the default printer TextPrintDocument pd = new TextPrintDocument(streamToPrint,textArea.Font); if (storedPageSettings != null) { pd.DefaultPageSettings = storedPageSettings ; } PrintDialog dlg = new PrintDialog() ; dlg.Document = pd; DialogResult result = dlg.ShowDialog(); try { if (result == DialogResult.OK) { pd.Print(); } } catch( Exception ex ) { Console.WriteLine(ex); dlg.Dispose(); } Tag: Recursion in CreateChildControls Tag: 98129
  - 13
    - TypeConverters IsValid method not getting called I have a TypeConverter derived from StringConverter in which I have overridden GetStandardValuesSupported GetStandardValues GetStandardValuesExclusive IsValid. Now, initially when I wrote this I did not have an IsValid method and therefore even if I entered an invalid value for the property on which my typeconverter is applied to it would accept it. After I added the IsValid method, I expected this behavior to change but when I run it under the debugger the IsValid method is not getting called at all. Any idea what is happening here? Thanks. Tag: Recursion in CreateChildControls Tag: 98127
  - 14
    - Serializing TreeView and DataGridView controls states Hello All, First of all thanks in advance to everyone who will try to help me. I have Form with TreeView control and DataGridView control. Each TreeNode has its own rows and due to I am placing rows to ArrayList and store it in tag of TreeNode like this: // dgv - DataGridView visible within whole class private void treeView1_AfterSelect(object sender, TreeViewEventArgs e) { dgv.Rows.Clear(); dgv.Columns.Clear(); DataGridViewCheckBoxColumn ins = new DataGridViewCheckBoxColumn(); ins.Name = "Insert"; ins.HeaderText = "Insert; ins.Width = 90; DataGridViewTextBoxColumn itemName = new DataGridViewTextBoxColumn(); itemName.HeaderText = "Item name"; itemName.Name = "itemName"; itemName.Width = (dgv.Width - ins.Width - 43) / 2; DataGridViewTextBoxColumn itemValue = new DataGridViewTextBoxColumn(); itemValue.HeaderText = "Item Value"; itemValue.Name = "itemValue"; itemValue.Width = (dgv.Width - ins.Width - 43) / 2; DataGridViewComboBoxColumn mdfLink = new DataGridViewComboBoxColumn(); mdfLink.Name = "mdfLink"; mdfLink.HeaderText = "MDF Link"; mdfLink.Width = (dgv.Width - 80) / 6; mdfLink.DropDownWidth = mdfLink.Width * 2; dgv.Columns.AddRange(new DataGridViewColumn[] {ins,itemName,itemValue, mdfLink}); if (treeView1.SelectedNode.Tag != null) { ArrayList al = (ArrayList)treeView1.SelectedNode.Tag; foreach (object obj in al) { dgv.Rows.Add((DataGridViewRow)obj); } } else { // fill rows manually // ... } } private void treeView1_BeforeSelect(object sender, TreeViewCancelEventArgs e) { ArrayList al = new ArrayList(); foreach (DataGridViewRow dgvr in dgv.Rows) { al.Add(dgvr); } if (al.Count != 0) { treeView1.SelectedNode.Tag = al; } } And I need to store state of TreeView in a file by serialization to future restoring (I know that TreeView doesn't support serialization but TreeNoew does). But DataGridViewRow is not support serialization. As matter of fact I tried to store values in string arrays and populate it accordingly. My question is: 1. Is anybody know better way of serialization of treeview with attached DataGridView? 2. In case of using my method how do I save/restore selected item of ComboBoxCell? I will appreciate any help. Best regards, /Gelios Tag: Recursion in CreateChildControls Tag: 98126
  - 15
    - Override of WebBrowserSite IDocHostUIHandler using WebBrowser.CreateWebBrowserSiteBase doesn't work According to http://msdn2.microsoft.com/en-us/library/system.windows.forms. webbrowser.createwebbrowsersitebase.aspx I should be able to customize the behavior of the System.Windows.Forms.WebBrowser control as follows: "To use this feature, implement classes that inherit from the WebBrowser and WebBrowser.WebBrowserSite classes. The unmanaged WebBrowser ActiveX control uses the protected CreateWebBrowserSiteBase method to retrieve extensibility interfaces implemented by the WebBrowser.WebBrowserSite class. Override the CreateWebBrowserSiteBase method to return an instance of your own class that inherits from the WebBrowser.WebBrowserSite class. The WebBrowser. WebBrowserSite class provides default implementations of the OLE IDocHostUIHandler. You can provide your own implementation of this interface or implement any other WebBrowser ActiveX control interface in order to customize the behavior of the control. If you provide your own implementation for any IDocHostUIHandler members, you must implement all the members of that interface." I've implemented my own classes and confirmed in debug that my version of CreateWebBrowserSiteBase is being called and creates my class. However, none of my IDocHostUIHandler methods are being called. I suspect that the problem may be in my constructor, which calls the WebBrowser.WebBrowserSite constructor, which creates a competing implementation of IDocHostUIHandler. The documentation implies that this should work. Am I missing anything? Any suggestions or workarounds? Thanks. Tag: Recursion in CreateChildControls Tag: 98124
  - 16
    - Newbie - I am trying to integrate a native MFC dialog app into a Windows forms MDI Hi, I am quite a novice at programming in general, but have taken it upon myself to help my boss with a project of his. He developed an MFC dialog application (non-managed i believe) and wants me to incorporate it into a reporting tool I am developing with Crystal Reports. I am using MS Visual Studio 2005, which I found Crystal Reports to be highly integratable(sp?) with Windows Forms development, so that is what I have been using. Now the MFC dialog application i would like to integrate merely updates and queries a sql database, and I am trying to get it to load within an MDI i developed. What is the best way to accomplish this with preserving as much of the original code as possible? Any suggestions or helpful links would be greatly appreciative. Thanks:) Tag: Recursion in CreateChildControls Tag: 98122
  - 17
    - DataGrid Sorting - Win forms .net 2003 Hi, I have a datagrid which is bound to a custom object's list item. I have to sort the datagrid. The moment I click on the header , the screen hangs. There are not too many records. About a 100. My list item implements a collection and is not a typical dataview. What should I do to sort it? Is it just enough to specify AllowSorting = true. What about Table Style. Any ideas ? PK Tag: Recursion in CreateChildControls Tag: 98114
  - 18
    - No DataBinding unless explicit Validate() if AutoValidate.Disable If I have a Form on which I set AutoValidate to Disable and controls which are databound, then the contents of the controls won't be transferred to the data source unless Validate() or ValidateChildren() is called. Is this by design? Does anyone know of a work around? Thank you, Leif Wickland Tag: Recursion in CreateChildControls Tag: 98113
  - 19
    - Detect button presses by intercepting WM_COMMAND I want to insert a 'general' message filter into a .NET application that will intercept button presses. IMessageFilter cannot be used because it only intercepts posted messages. So I override WndProc and filter on WM_COMMAND messages to detect button presses in the application. However the button presses are not being detected in my app. I have modified the app to have just one button on it and used spy++ to see what messages the button press generates. But nothing ! Any ideas ? Tag: Recursion in CreateChildControls Tag: 98111
  - 20
    - Multiple Modeless forms, each with a Modal child form. I have the need for the following scenario: I creat 2 or more Modeless child forms from my main form. I can easily, as expected, switch betwenn them with no problem. Each modeless child form must be able to create a single Modal form. Due to the nature of the Modal form, I can't do this since once I've created the first Modal form as a child of one of the Modeless forms, I cannot switch focus to another of the Modeless forms inorder to create another Modal form. Briefly, here is the sequence of methods I want to use: MainForm: Call Dialog.Show() multiple times creating a new ChildForm each time. ChildForm: Call Dialog.ShowDialog() once (but I want to be able to do this in each ChildForm). Any ideas? Thanks in advance. Tag: Recursion in CreateChildControls Tag: 98110
  - 21
    - Windows Form - Datagrid problem I have a dataset containing two related tables and a relation. I use the dataset's parent table as a datasource to a datagrid. This causes the diata to display with a '+' symbol at the left of the row - indicating the hierarchical relationship and allowing drilling into the child table. How can keep the same dataset but get rid of the '+' symbol in the datagrid? I am using C# and .Net version 1.1 Thanks Tag: Recursion in CreateChildControls Tag: 98109
  - 22
    - Making "Everyone" the default option while installing the setup... I know the solution of setting the "Everyone" option by default at time of setup installation, by modifying the msi in the ORCA editor. Now, I have to create the msi with no dialog boxes(no start or progress interfaces), the problem is there's no way to change the default setting from 'Just Me' which is default to 'Everyone'. Can anyone suggest what could be the solution for this if it is alt all possible to do? Thanks for any suggestion and help. Tag: Recursion in CreateChildControls Tag: 98104
  - 23
    - TableLayoutPanel - get cell clicked Hello, I had posted this to the C# group but then realised here might be more relevant. This seems like it should be simple - on the double-click event of a tablelayoutpanel, I want to know which cell was double clicked in. I can't see any of the properties that look relevant to this, could someone give me a pointer where to look? I can see various properties to give me the cell of a certain control and so on, but some cells might not have a control in yet (by double clicking the user will instigate the creation of a control in that cell - or at least that's the plan!) Thanks! James Tag: Recursion in CreateChildControls Tag: 98102
  - 24
    - Hosting word on a form - supported My searches have not turned up anything, but is there a way to host winword on a form? It looks like the other office components are there, but word seems to be missing. Yes, I might use the browser control and navigate to a file but that seems fishy. I found some notes on SetParent and it being unreliable. Is there any official word? (Sorry for the bad pun.) The component that I am trying to interface (Dragon naturally speaking) likes word way more than it likes the richTextBox. (It has the habit of always inserting at position 2 in the rtb.) Thanks in advance Tag: Recursion in CreateChildControls Tag: 98097
  - 25
    - Visual Studio 2005/.Net Framework 2.0 Certifications - Beta Offer Visual Studio 2005/.Net Framework 2.0 Certifications - http://www.microsoft.com/learning/mcp/newgen/ I am sending this post only to only related newgroups... Still my advanced appologies for cross posting, but have got a lots of feedback that folks did not get advance notification of beta exams as they never subscibed to a particular forum... Do note that only first 750 people will get an opportunity to take a particular Beta Exam and the offer will be on first come first serve basis... 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Tag: Recursion in CreateChildControls Tag: 98095
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    - Solution / Request for Suggestions: DataGrid Button Column using C# I've tried to find examples of adding a button column to a WinForms DataGrid. Unfortunately, all of the examples I have found only allow you to click on the button for the currently selected row. Below is a class that I wrote that displays clickable buttons for each row along with a sample form that uses the class. Hopefully this will help some people out. If you try this code, please post some feedback on suggestions for improvements or bugs. This has been in use in a few applications for a couple months and seems to be stable and reliable. However, I'm still a little concerned about the mouse event handlers that are registered with the underlying DataGrid. Thanks! To use this example, create a new Windows Forms project, add a new class module to the project, and then do the following. 1. Paste this code into the class module: using System; using System.Windows.Forms; using System.Drawing; using System.Drawing.Drawing2D; using System.Diagnostics; namespace TestApp { /// <summary> /// Adds a column to a DataGrid that displays /// a button that can be responded to /// via an event that fires when it is clicked. /// </summary> /// <remarks> /// Major gotcha: adding this DataGridColumnStyle /// to a DataGrid will register /// handlers with the MouseDown, MouseUp, and /// MouseMove events in the DataGrid. /// Therefore, destroying a DataGrid's TableStyle and /// adding a new one will cause /// unexpected behavior if the mouse handlers are not /// removed manually before hand. /// </remarks> public class DataGridButtonColumn : DataGridColumnStyle { /* * Fires when a button is clicked in this column. */ public delegate void ClickEventHandler(object sender, DataGridButtonEventArgs e); public event ClickEventHandler Click; private int _xMargin = 2; private int _yMargin = 1; private string _buttonName = ""; private bool _editing = false; private int _editingRowNum = 0; private bool _isMouseDown = false; private int _mouseRow = -1; private int _mouseCol = -1; private DataGrid.HitTestInfo _mousePos = null; public DataGridButtonColumn(string buttonName) { _buttonName = buttonName; } #region Overridden methods protected override void Abort(int rowNum) { Debug.WriteLine("Abort()"); endEdit(); } protected override bool Commit(CurrencyManager dataSource, int rowNum) { if(_editing) { endEdit(); } return true; } protected override void Edit(CurrencyManager source, int rowNum, Rectangle bounds, bool readOnly, string instantText, bool cellIsVisible) { _editingRowNum = rowNum; _editing = true; } protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowNum) { /* * Propogate to the next Paint() handler. */ Paint(g, bounds, source, rowNum, false); } protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowNum, bool alignToRight) { /* * Create a buffer to draw to. (Double-buffering) */ Bitmap buffer = new Bitmap(bounds.Width, bounds.Height); Graphics bg = Graphics.FromImage(buffer); Rectangle bufferBounds = new Rectangle(0, 0, bounds.Width, bounds.Height); /* * Default background for the cell. */ Brush backBrush; if(rowNum % 2 == 0) { backBrush = new SolidBrush(this.DataGridTableStyle.BackColor); } else { backBrush = new SolidBrush(this.DataGridTableStyle.AlternatingBackColor); } Brush foreBrush = new SolidBrush(this.DataGridTableStyle.ForeColor); bg.FillRectangle(backBrush, bufferBounds); /* * Draw the button. */ Rectangle buttonBounds = bufferBounds; buttonBounds.Offset(_xMargin, _yMargin); buttonBounds.Width -= _xMargin * 2; buttonBounds.Height -= _yMargin * 2; /* * The "Down" state requires that the button on this row has had the mouse * down event fired on it and the mouse must still be over top of this button. */ if(_isMouseDown && rowNum == _mouseRow && _mousePos != null && _mousePos.Row == _mouseRow && _mousePos.Column == _mouseCol) { DrawDown(bg, buttonBounds); bounds.Offset(1, 1); PaintText(bg, bufferBounds, _buttonName, foreBrush, alignToRight); } else { DrawUp(bg, buttonBounds); PaintText(bg, bufferBounds, _buttonName, foreBrush, alignToRight); } /* * Render the secondary buffer to the real buffer. */ g.DrawImageUnscaled(buffer, bounds); } protected override void Paint(Graphics g, Rectangle bounds, CurrencyManager source, int rowNum, Brush backBrush, Brush foreBrush, bool alignToRight) { /* * Let the base class handle any painting needs. */ base.Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight); } protected override int GetMinimumHeight() { return 0; } protected override int GetPreferredHeight(Graphics g, object value) { return 0; } protected override Size GetPreferredSize(Graphics g, object value) { return new Size (0, 0); } protected override void SetDataGridInColumn(DataGrid value) { base.SetDataGridInColumn (value); /* * Add the mouse handlers, but make certain that there is only * one handler registered per event. */ RemoveMouseHandlers(value); AddMouseHandlers(value); } #endregion #region Helper functions public void RemoveMouseHandlers(DataGrid dg) { dg.MouseDown -= new MouseEventHandler(DataGridMouseDown); dg.MouseUp -= new MouseEventHandler(DataGridMouseUp); dg.MouseMove -= new MouseEventHandler(DataGridMouseMove); } private void AddMouseHandlers(DataGrid dg) { dg.MouseDown += new MouseEventHandler(DataGridMouseDown); dg.MouseUp += new MouseEventHandler(DataGridMouseUp); dg.MouseMove += new MouseEventHandler(DataGridMouseMove); } private void endEdit() { _editing = false; Invalidate(); } private void PaintText(Graphics g, Rectangle TextBounds, string Text, Brush ForeBrush, bool AlignToRight) { Rectangle Rect = TextBounds; RectangleF RectF = Rect; StringFormat Format = new StringFormat(); if(AlignToRight) { Format.FormatFlags = StringFormatFlags.DirectionRightToLeft; } switch(this.Alignment) { case HorizontalAlignment.Left: Format.Alignment = StringAlignment.Near; break; case HorizontalAlignment.Right: Format.Alignment = StringAlignment.Far; break; case HorizontalAlignment.Center: Format.Alignment = StringAlignment.Center; break; } Format.FormatFlags = Format.FormatFlags; Format.FormatFlags = StringFormatFlags.NoWrap; Rect.Offset(0, _yMargin); Rect.Height -= _yMargin; g.DrawString(Text, this.DataGridTableStyle.DataGrid.Font, ForeBrush, RectF, Format); Format.Dispose(); } private void DrawUp(Graphics g, Rectangle bounds) { // Face g.FillRectangle(new SolidBrush(SystemColors.ControlLight), bounds); // Light edges Point[] pt = new Point[3]; pt[0] = new Point(bounds.Left, bounds.Bottom); pt[1] = new Point(bounds.Left, bounds.Top); pt[2] = new Point(bounds.Right, bounds.Top); g.DrawLines(Pens.White, pt); // Dark-dark shadow pt[0] = new Point(bounds.Right, bounds.Top); pt[1] = new Point(bounds.Right, bounds.Bottom); pt[2] = new Point(bounds.Left, bounds.Bottom); g.DrawLines(new Pen(SystemColors.ControlDarkDark), pt); // Dark shadow pt[0] = new Point(bounds.Right-1, bounds.Top+1); pt[1] = new Point(bounds.Right-1, bounds.Bottom-1); pt[2] = new Point(bounds.Left+1, bounds.Bottom-1); g.DrawLines(new Pen(SystemColors.ControlDark), pt); } private void DrawDown(Graphics g, Rectangle bounds) { // Face g.FillRectangle(new SolidBrush(SystemColors.ControlLight), bounds); // Light edges Point[] pt = new Point[3]; pt[0] = new Point(bounds.Left, bounds.Bottom); pt[1] = new Point(bounds.Left, bounds.Top); pt[2] = new Point(bounds.Right, bounds.Top); g.DrawLines(Pens.White, pt); // Light-light edges pt[0] = new Point(bounds.Left+1, bounds.Bottom-1); pt[1] = new Point(bounds.Left+1, bounds.Top+1); pt[2] = new Point(bounds.Right-1, bounds.Top+1); g.DrawLines(new Pen(SystemColors.ControlLightLight), pt); // Dark shadow pt[0] = new Point(bounds.Right, bounds.Top); pt[1] = new Point(bounds.Right, bounds.Bottom); pt[2] = new Point(bounds.Left, bounds.Bottom); g.DrawLines(new Pen(SystemColors.ControlDark), pt); } private int getColumnNumber() { /* * For some reason, there is no way to determine what column you occupy * without traversing the entire column collection and finding yourself. */ for(int i = 0; i < this.DataGridTableStyle.GridColumnStyles.Count; i++) { if(this == this.DataGridTableStyle.GridColumnStyles[i]) { return i; } } return -1; } #endregion #region Event handlers private void DataGridMouseDown(object sender, MouseEventArgs e) { /* * Ignore all clicks other than left clicks. */ if(e.Button != MouseButtons.Left) { return; } /* * Store the row / column pair that this mouse down event occurred on. */ DataGrid dg = this.DataGridTableStyle.DataGrid; DataGrid.HitTestInfo ht = dg.HitTest(new Point(e.X, e.Y)); _mouseRow = ht.Row; _mouseCol = ht.Column; Debug.WriteLine("Down: " + ht); /* * Only set the _isMouseDown state to true if this column was clicked. */ if(_mouseCol == getColumnNumber()) { _isMouseDown = true; _mousePos = ht; } Invalidate(); } private void DataGridMouseUp(object sender, MouseEventArgs e) { /* * Store the row / column pair that this mouse up event occurred on. * Later, the Paint() event will test to see if it was a valid click on * a button and fire the ButtonClicked event if it was a valid click. */ DataGrid dg = this.DataGridTableStyle.DataGrid; DataGrid.HitTestInfo ht = dg.HitTest(new Point(e.X, e.Y)); Debug.WriteLine("Up: " + ht); if(_isMouseDown && ht.Row == _mouseRow && ht.Column == _mouseCol) { Debug.WriteLine("Clicked " + ht); // Fire the Click event if someone has registered to receive it if(Click != null) { Click(this, new DataGridButtonEventArgs(_mouseRow, _mouseCol)); } } _isMouseDown = false; _mousePos = null; Invalidate(); } private void DataGridMouseMove(object sender, MouseEventArgs e) { /* * Determine if the button needs switch state to an up or down position. * * We want to emulate the behavior of a button springing up if the mouse * was clicked down on it and then moved off before the mouse button is * released. We also need the button to push itself back down if the * mouse moves back over the button. */ if(_isMouseDown) { DataGrid dg = this.DataGridTableStyle.DataGrid; DataGrid.HitTestInfo ht = dg.HitTest(new Point(e.X, e.Y)); if(ht != _mousePos) { _mousePos = ht; Invalidate(); } } } #endregion } /// <summary> /// EventArgs class that includes the row and column that was clicked. /// </summary> public class DataGridButtonEventArgs : EventArgs { private int _column; private int _row; public DataGridButtonEventArgs(int row, int col) { _row = row; _column = col; } public int Column { get { return _column; } } public int Row { get { return _row; } } } } 2. Overwrite the code in Form1.cs with this code: using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace TestApp { public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.DataGrid dgTest; private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); /* * Create dummy data. This should be pulled from a database in reality. */ DataTable dt = new DataTable("ButtonSample"); dt.Columns.Add("Sample1"); dt.Columns.Add("Sample2"); dt.Columns.Add("Unbound1"); /* Necessary for the button column to bind to. Can this be avoided? */ for(int i = 0; i < 10; i++) { DataRow row = dt.NewRow(); row["Sample1"] = i.ToString(); row["Sample2"] = (i * 2).ToString(); dt.Rows.Add(row); } dgTest.DataSource = dt; /* * Create a DataGridTableStyle with a button column. */ DataGridTableStyle dgts = new DataGridTableStyle(); dgts.MappingName = dt.TableName; dgts.GridColumnStyles.Add( CreateTextBoxColumn("Sample1", "Sample 1")); dgts.GridColumnStyles.Add( CreateTextBoxColumn("Sample2", "Sample 2")); DataGridButtonColumn buttonCol = new DataGridButtonColumn("Test"); buttonCol.MappingName = "Unbound1"; buttonCol.HeaderText = "Button"; buttonCol.Click += new TestApp.DataGridButtonColumn.ClickEventHandler(buttonCol_Click); dgts.GridColumnStyles.Add(buttonCol); dgTest.TableStyles.Add(dgts); } private DataGridTextBoxColumn CreateTextBoxColumn(string mappingName, string headerText) { DataGridTextBoxColumn col = new DataGridTextBoxColumn(); col.MappingName = mappingName; col.HeaderText = headerText; col.NullText = ""; return col; } protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.dgTest = new System.Windows.Forms.DataGrid(); ((System.ComponentModel.ISupportInitialize)(this.dgTest)).BeginInit(); this.SuspendLayout(); // // dgTest // this.dgTest.DataMember = ""; this.dgTest.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.dgTest.Location = new System.Drawing.Point(8, 8); this.dgTest.Name = "dgTest"; this.dgTest.Size = new System.Drawing.Size(456, 288); this.dgTest.TabIndex = 0; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(472, 302); this.Controls.Add(this.dgTest); this.Name = "Form1"; this.Text = "Form1"; ((System.ComponentModel.ISupportInitialize)(this.dgTest)).EndInit(); this.ResumeLayout(false); } #endregion [STAThread] static void Main() { Application.Run(new Form1()); } private void buttonCol_Click(object sender, DataGridButtonEventArgs e) { DataGrid x = ((DataGridButtonColumn)sender).DataGridTableStyle.DataGrid; CurrencyManager cm = (CurrencyManager)BindingContext[x.DataSource]; DataRow r = ((DataRowView)cm.List[e.Row]).Row; MessageBox.Show( "Sample 1: " + r["Sample1"].ToString() + ", Sample 2: " + r["Sample2"].ToString()); } } } Tag: Recursion in CreateChildControls Tag: 98083
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    - Playing an animated gif file in a windows form application. What's the easiest way to play an animated gif in a windows forms application? TIA - Jeff. Tag: Recursion in CreateChildControls Tag: 98081
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    - How to make DataDridViewComboBoxColumn editable I am using VS 2005. The DataDridViewComboBoxColumn in the datadridview is not letting me edit (type in) the text in combobox. All i could do is select an option from the list. Any idea how to make DataDridViewComboBoxColumn editable? Thanks in advance. Tag: Recursion in CreateChildControls Tag: 98079
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    - ListView SelectedIndexChanged Firing Twice, possible solution? I know that by design, the SelectedIndexChanged event fires twice when the SelectedIndex changes, once for the unselection of the previous index, and once for the selection of the new index. This is somewhat bothersome to me because I have listeners for those events that toggle the enabled states of other controls on the form based on whether an item is selected or not, and this creates an ugly blinking effect. Is there any way to peek into the message queue and see if there is another SelectedIndexChange event coming? I know I can't see into the future, but I'm hoping the messages will be placed into the queue simultaniously and that they will both be in the queue when I recieve the first event. My current solution, which I'm not really that pleased with, is to have a Timer t on the form with a 100 millisecond interval. When the SelectedIndexChanged event fires, I check a flag to see if the timer is running. If it's not running, I start the timer and set the flag. On the Tick event of the timer, I fire my own SelectedItemChanged event, stop the timer, and reset the flag. Basically what's happening is I'm only allowing one SelectedIndex event to fire within any given 100 millisecond window. This works, I don't get the flickering, but it seems kinda hackish and unpredicable. Any better suggestions? Tag: Recursion in CreateChildControls Tag: 98076
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    - Width of textbox on a FlowLayoutPanel Hi, I have three textboxes on the same row on a FlowLayoutPanel. I want the one on the left and right to have a fixed width but for the one in the middle to fill any remaining space depending on the width of the FlowLayoutPanel. Is this possible? (The widths of the left and right boxes aren't known until runtime). I was thinking that I could handle the SizeChangingEvent and work out the width to set the middle text box to. This would basically be: width of FlowLayoutPanel - width of left text box- width of right text box. However, I don't know how to determine what controls are on the same row in order to retrieve their width?! Any help appreciated. Thanks Tristan. Tag: Recursion in CreateChildControls Tag: 98074
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    - SplitContainer Transitions Folks, I am using the very helpful SplitContainer (horizontal) to show a list of items on the bottom panel and the details of a chosen item on the top panel. The top panel is initally collapsed. The user sees the details by chosing a menu item (as in File, Item Properties). When this occurs, the top panel is "un-collapsed." Our client is requesting a softer transition from not seeing the panel to suddenly seeing it (as fading in/out from the top of the form). Could you point me in the right direction as to whether this is possible? If it is, can you give me a hint of where to start my research (for example, which events to call, or which methods to override)? Thank you very much for your time, Elsa Tag: Recursion in CreateChildControls Tag: 98073
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    - datagrid, change combobox value at run time based on the value of another combobox at different column Hi, I have an application containing a datagrid. I add columns to the datagrid programmatically, each row has a few textbox column and a few combobox columns. One combobox colum is key field. If user choose a value from the key combo box, then I want the value in other cells changed accordingly based on certain logic. I could change the value of text box cells by changing the value in datatable, but the difficulty is how to change the value of combobox at the same row. It seems windows datagrid does not allow you to get hold of individual cell. Hope some one could help. Thanks zhuang Tag: Recursion in CreateChildControls Tag: 98070
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    - Converting RTF to MHTM (or XML with Base64) Hi, we developing an Winform (Framework 2.0) application where the user can write documents in richtext. After the save process the document should be saved as a MHTML stream to a database for our intranet. The maingoal is that the user must not upload pictures to a gallery and select them after to insert in the document, he should work like Word in Office. Now my question is, how to convert the rtf stream to a MHTML stream to save this in a database (SQL 2005)? Is there any component to do that or has anyone a example for me? I have seen some examples but that uses always the CDO for this job :-( thanks in advance for any tips Volkan S. Tag: Recursion in CreateChildControls Tag: 98068
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    - Troubles with Garbage Collector. I'm having trouble cleaning up memory in a datagrid. I have a datagrid that is set a datatable as its datasource every 5 seconds - each datatable assigned has the same structure but different content. When I perform the following line of code: this.dbgEvents.SetDataBinding(e.Table, ""); the data on the datagrid is changed to reflect the new data. The problem I am experiencing is that memory is not being cleaned up properly. I'm getting the following objects hanging around: System.WeakReference System.Windows.Forms.BindingContext.HashKey I've found these by using the .NET Memory Profiler application. As the application loops and assigns a new datasource to the datagrid these objects build up and consume memory. I've tried the following to free the memory with no success: if(dbgEvents.DataSource != null) ((DataTable)this.dbgEvents.DataSource).Dispose(); this.dbgEvents.SetDataBinding(e.Table, ""); Can anyone help with how to cleanup memory from a datagrid? It appears as though the datagrid is still clinging to some objects and thus the garbage collection cannot remove them. Thanks, Neo Tag: Recursion in CreateChildControls Tag: 98067
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    - Problems with smart client versions Hello I am having a big performance problem with a smart client application done in .NET 2003. When accessing the web server, the version check takes ages to complete if the client download cache contains old versions of the application. After deleting old versions, the application starts again working at full speed. Any hint would really be appreciated, mauro Tag: Recursion in CreateChildControls Tag: 98066
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    - How to see properties composed in the Trowel of Properties? Good day; I have this one problem; I declared struct "myNumber", and in a UserControl "MyControl". I declared a property myNumber named "NumberComposition", desire that in the properties palette of the created controls of MyControl type me appear the property in the same way as they appear the Font, Location or Size properties. That I must do? To see I cosay The code is: ___________________________________________________________________ using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; using System.Windows.Forms; namespace My.Windows.Controls { public struct myNumber { public readonly Int32 Precision; public readonly Int32 Scale; public Number(Int32 precision,Int32 scale ){ Precision = precision; Scale = scale; } } /// <summary> /// Descripción breve de Mycon. /// </summary> public class MyControl: System.Windows.Forms.UserControl { /// <summary> /// Variable del diseñador requerida. /// </summary> private System.ComponentModel.Container components = null; private myNumber _numbercomposition = new Number(13,0); public MyControl() { // Llamada necesaria para el Diseñador de formularios Windows.Forms. InitializeComponent(); // TODO: agregar cualquier inicialización después de llamar a InitializeComponent } public myNumber NumberComposition{ get{ return this._numbercomposition; } set{ if (this._numbercomposition.ToString() == value.ToString()) return; this._numbercomposition = value; if(this.NumberType == NumericType.Integer && this._numbercomposition.Scale > 0 ) MessageBox.Show("Value error"); } } protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } private void InitializeComponent() { components = new System.ComponentModel.Container(); } #endregion } } Tag: Recursion in CreateChildControls Tag: 98063
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    - DrawString method - diagonal text? Hi, I am using the DrawString method to add 2 strings to a label at right-angles to each other (so one is horizontal, and the other string is vertical) Both strings start with 'S' - now, is there any way to make that 'S' diagnoal instead of vertical ? That way it would really appearf as though it's between both strings... thanks Philip Tag: Recursion in CreateChildControls Tag: 98062
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    - ClickOnce and not IE Does ClickOnce work with browsers other than IE now (didn't in January). If not what's the best workaround? thanks, Tag: Recursion in CreateChildControls Tag: 98058
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    - My website : Opinions please. Please, I have just created this site and am wondering what your opinion is from both professionals and amatures or the curious alike. Any opinions? www.integrated-dev-sol.co.uk Remove 123 from email address to reply. Anti spam and virus measure. Tag: Recursion in CreateChildControls Tag: 98046
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    - trouble with events (Paint event) question - please help Hi, I have a Splash form in my Windows Forms app. It has a label on it, and in the Paint event of the label, I draw some text on the label. But I also want the Splash form to load my MDI form and carry out the initialisation of the application... Trouble is, it only paints the Splash form with the label and text, then it does nothing else, even though I have code in the splash form Paint event like this: Me.Cursor = Cursors.WaitCursor If m_blnPaintOnce = False Then Call DrawStringFloatFormat(e) Else If m_blnAppReady = False Then Label3.Text = "load management form" ManagementForm = New frmManagement m_blnAppReady = True Else Cursor = Cursors.Default Label3.Text = "finished, hide and show" Me.Dispose() ManagementForm.Visible = True End If End If I don't know what is wrong, it never shows the MDI form, just shows the Splash form then stops. I just want it to paint the slash form once, write the text on it, then laod the main form, wait while it does it's work, then hide itself, but it never does it. Please help, this is really a strange problem. thanks, Philip Tag: Recursion in CreateChildControls Tag: 98045
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    - Problem: Serialization using "<NonSerialized>" Does this attribute really work? I'm trying to "deep" serialize one of my objects which has a member variable pointing to a Form object. I don't want to serialize this form (and I know that I can't do this anyway because the Form class is not marked as Serializable). I try marking this member variable with the <NonSerialized> attribute, but the BinaryFormatter seems to be ignoring this attribute; It throws an exeption "Class frmReport {some info about the class here} can not be serialized, because it is not marked as Serializable" Is there any other way to prevent the serialization of a member variable that I don't know? Thanx everyone. Tag: Recursion in CreateChildControls Tag: 98043
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    - generate Word from application I'm building an windowsforms application in dotnet2.0. I would like to generate an invoice in Word for printing with data from the sql server database. Is there a good totorial on how this is done? thanks! Tag: Recursion in CreateChildControls Tag: 98042
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    - Slide-out and Splitter Two questions. First, what does MS recommend / offer for creating those nifty slide-out dialogues (?) that Visual Studio has? Yes I'm talking about, for example, the default behavior of the Toolbox, or Properties dialogues in Visual Studio, which slide back and forth (Unless you select the push-pin). I don't even know what that "sliding" control is called, no less how to put one on my WinForm. Help? Second question: what effectively is the difference between a SplitContainer and a Splitter? Why choose one over the other? Tag: Recursion in CreateChildControls Tag: 98039
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    - Third time to ask this question,can anybody help me? I want to run my ClickOne applications with command line arguments.I published my application by visual studio.net 2005,and my application url is http://localhost/myapplication/myapplication.application?myname=sunny. I have read the article about no-touch deployment applications : http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnforms/html/winforms05152003.asp and followed his steps.My code is below: AppDomain domain = AppDomain.CurrentDomain; object obj = domain.GetData("APP_LAUNCH_URL"); string appLaunchUrl = (obj != null ? obj.ToString() : ""); But I can never get the value of appLaunchUrl.The method domain.GetData("APP_LAUNCH_URL") always returns null.I could not find any description about APP_LAUNCH_URL data variable in MSDN. When I copied myapplication.exe to IIS directory and run the application from the url of http://localhost/myapplication/myapplication.exe?myname=sunny , I could get the value as the article said. So why? And how can I get the value if I use the publish function of visual studio.net 2005 and run the application from the url: http://localhost/myapplication/myapplication.application?myname=sunny Thanks! Tag: Recursion in CreateChildControls Tag: 98036
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    - Desinger view error with simple inheritance: Constructor on type '' not found. I have a class that inherits user control: public partial class ValidationSubDesigner : UserControl { It works jsut fine, the problem occurs when I try to inherit it: public partial class FieldCompareFieldDesigner : ParamDesigner { //public partial class FieldCompareFieldDesigner : UserControl { The top line is required in order to compile, the second line is required in order to get the designer view to work. I get the error below when I try to bring up the designer view. The full eror and stack trace. One or more errors encountered while loading the designer. The errors are listed below. Some errors can be fixed by rebuilding your project, while others may require code changes. Constructor on type 'AbacusControls.PropertyEditors.Designer.ValidationDesigner.SubDesigners.Test' not found. Hide at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes) at System.ComponentModel.Design.DesignSurface.CreateInstance(Type type) at Microsoft.VisualStudio.Design.VSDesignSurface.CreateInstance(Type type) at System.ComponentModel.Design.DesignerHost.System.ComponentModel.Design.IDesignerHost.CreateComponent(Type componentType, String name) at System.ComponentModel.Design.Serialization.DesignerSerializationManager.CreateInstance(Type type, ICollection arguments, String name, Boolean addToContainer) at System.ComponentModel.Design.Serialization.DesignerSerializationManager.System.ComponentModel.Design.Serialization.IDesignerSerializationManager.CreateInstance(Type type, ICollection arguments, String name, Boolean addToContainer) at System.ComponentModel.Design.Serialization.TypeCodeDomSerializer.Deserialize(IDesignerSerializationManager manager, CodeTypeDeclaration declaration) at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.DeferredLoadHandler.Microsoft.VisualStudio.TextManager.Interop.IVsTextBufferDataEvents.OnLoadCompleted(Int32 fReload) Tag: Recursion in CreateChildControls Tag: 98032
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    - IME window question I wrote a text input aware control. in C# 2.0, inheriting from SWF.Control. Users eventually use the IME input window to enter text. I would like to be able to do just like Notepad (or the text boxes), that is position the IME window at the position of the caret and set its font to the current selection's font. How do I do that? C++ tips welcome as well ;-) Tag: Recursion in CreateChildControls Tag: 98030
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    - DataGridColumnStyle Format Property One of the columns of my datagrid is an account #. The actual field which is coming from a sql server database is defined as a character. Within the database the account # 200300001 come across in our financial system as 20030000.1. How do I define a character field format, as an example (XXXXXXXX.X), in the datagridcolumnstyle format property using the designer? Currently I can format numeric fields in the a datagridcolumnstyle format property with, as an example, "###,##0.00". Thanks in advance. Tag: Recursion in CreateChildControls Tag: 98028
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    - Setting a control focus in OnLoad event. Based on data present when I load a form, I need to be able to set focus to a specific control. I have added code as the last line of my Load handler setting a control to have focus. e.g. control3.Focus(). But when the form is displayed, the first control with tab stop has focus instead of the control I set. This should be a very basic thing to do but I can't figure out how. In the WIN32 API, you would return false form the OnInitDialog() method to allow retention of focus you set programmatically. Anyone know how to do this? Thanks, Tony Tag: Recursion in CreateChildControls Tag: 98027
  - 24
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In my custom control I have overriden CreateChildControls and the first few
lines look like this.

protected override void CreateChildControls()
{
Debug.WriteLine("CreateChildControls", "FeatureList");
Controls.Clear();
..
}

what I am seeing is that the Controls.Clear line indirectly calls
CreateChildControls (the call is through a Get on the Controls collection
from the stack).

Although the controls end up being right, they are created twice which is
hardly efficient. What do I need to do to stop this happening?

Iain
--
Iain Downs (DirectShow MVP)
Commercial Software Therapist
www.idcl.co.uk

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Re: Recursion in CreateChildControls by Iain

Iain
Sun Feb 26 10:12:10 CST 2006

On Sun, 26 Feb 2006 14:42:18 +0000, Iain wrote:

> In my custom control I have overriden CreateChildControls and the first few
> lines look like this.
>
> protected override void CreateChildControls()
> {
> Debug.WriteLine("CreateChildControls", "FeatureList");
> Controls.Clear();
> ..
> }
>
> what I am seeing is that the Controls.Clear line indirectly calls
> CreateChildControls (the call is through a Get on the Controls collection
> from the stack).
>
> Although the controls end up being right, they are created twice which is
> hardly efficient. What do I need to do to stop this happening?
>
> Iain

What a stupid place to post an ASP.NET question. My apologies.

Iain
--
Iain Downs (DirectShow MVP)
Commercial Software Therapist
www.idcl.co.uk

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