TypeConverters IsValid method not getting called

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  - 1
    - 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: TypeConverters IsValid method not getting called Tag: 98126
  - 2
    - 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: TypeConverters IsValid method not getting called Tag: 98124
  - 3
    - 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: TypeConverters IsValid method not getting called Tag: 98122
  - 4
    - 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: TypeConverters IsValid method not getting called Tag: 98114
  - 5
    - 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: TypeConverters IsValid method not getting called Tag: 98113
  - 6
    - 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: TypeConverters IsValid method not getting called Tag: 98111
  - 7
    - 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: TypeConverters IsValid method not getting called Tag: 98110
  - 8
    - 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: TypeConverters IsValid method not getting called Tag: 98109
  - 9
    - 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: TypeConverters IsValid method not getting called Tag: 98104
  - 10
    - 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: TypeConverters IsValid method not getting called Tag: 98102
  - 11
    - 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: TypeConverters IsValid method not getting called Tag: 98097
  - 12
    - 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: TypeConverters IsValid method not getting called Tag: 98095
  - 13
    - 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: TypeConverters IsValid method not getting called Tag: 98083
  - 14
    - 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: TypeConverters IsValid method not getting called Tag: 98081
  - 15
    - 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: TypeConverters IsValid method not getting called Tag: 98079
  - 16
    - 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: TypeConverters IsValid method not getting called Tag: 98076
  - 17
    - 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: TypeConverters IsValid method not getting called Tag: 98074
  - 18
    - 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: TypeConverters IsValid method not getting called Tag: 98073
  - 19
    - 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: TypeConverters IsValid method not getting called Tag: 98070
  - 20
    - 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: TypeConverters IsValid method not getting called Tag: 98068
  - 21
    - 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: TypeConverters IsValid method not getting called Tag: 98067
  - 22
    - 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: TypeConverters IsValid method not getting called Tag: 98066
  - 23
    - 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: TypeConverters IsValid method not getting called Tag: 98063
  - 24
    - 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: TypeConverters IsValid method not getting called Tag: 98062
  - 25
    - 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: TypeConverters IsValid method not getting called Tag: 98058
- Next
  - 1
    - 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: TypeConverters IsValid method not getting called Tag: 98046
  - 2
    - 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: TypeConverters IsValid method not getting called Tag: 98045
  - 3
    - 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: TypeConverters IsValid method not getting called Tag: 98043
  - 4
    - 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: TypeConverters IsValid method not getting called Tag: 98042
  - 5
    - 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: TypeConverters IsValid method not getting called Tag: 98039
  - 6
    - 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: TypeConverters IsValid method not getting called Tag: 98036
  - 7
    - 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: TypeConverters IsValid method not getting called Tag: 98032
  - 8
    - 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: TypeConverters IsValid method not getting called Tag: 98030
  - 9
    - 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: TypeConverters IsValid method not getting called Tag: 98028
  - 10
    - 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: TypeConverters IsValid method not getting called Tag: 98027
  - 11
    - Opening a ContextMenu without a parent control Hi, I am writing an Excel addin with C#. I have some ActiveX objects embedded within the spreadsheet and when the user clicks on one of them I want to show a context menu. Now the problem is that ContextMenu.Show() needs a Control object as parameter but in my scenario there is no Winforms control object. I have the HWND window handle of the ActiveX object but I can't figure out how to pass it to the ContextMenu object. Any ideas how to do this? Thanks Hans Merkl Tag: TypeConverters IsValid method not getting called Tag: 98026
  - 12
    - VS.NET 2003, Format functions... VS.NET has format functions for the Forms Designer, like Align, Make SameSize, Center in Form, etc... I am just looking to see if there is any standard library I can use to do these functions at runtime. I googled, but could not find anything... I know I can write these in a day or 2... but just thinking why re-invent if something is there... Can somebody point me to the right direction? VJ Tag: TypeConverters IsValid method not getting called Tag: 98025
  - 13
    - ListView SelectedIndexChanged firing twice Hi, I have a Listview that is firing an event twice and both time the selecteditems count is = 1 In the call stack there is form.show Tag: TypeConverters IsValid method not getting called Tag: 98023
  - 14
    - The dreded EnableVisualStyles and External exception error We really want to use the visual styles in our app but get that stupid external exception error at the weirdest times. I call it like this: static void Main() { Application.EnableVisualStyles(); Application.DoEvents(); Application.Run(new MyForm() ); } The problem seems to occur sometimes when DoEvents is called again within the application but not actually at the call. The exception is throw during other code execution. Although, if I comment out DoEvents() it will work in most cases. I need to call DoEvents in some cases so I can't completely remove it. Any suggestions? -Joe Tag: TypeConverters IsValid method not getting called Tag: 98021
  - 15
    - Start and minimize another application From within my .NET forms application I want to start and minimize another application, so I go: string eprog = System.Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles) + @"\EvilLyrics\EvilLyrics.exe"; if (File.Exists(eprog)) { ProcessStartInfo psi = new ProcessStartInfo(eprog); psi.UseShellExecute = false; psi.WindowStyle = ProcessWindowStyle.Minimized; Process.Start(psi); } This starts the other application OK but doesn't minimize the window. Why? Do I have to minimize the other application via Interop? If so how? Tag: TypeConverters IsValid method not getting called Tag: 98014
  - 16
    - Drag&Drop problem I have following code: private void listView1_DragEnter(object sender, System.Windows.Forms.DragEventArgs e) { if ((e.Data is DragDropPackage) && (((DragDropPackage)e.Data).id_typ_krw == this.id_typ_krw)) e.Effect = DragDropEffects.Move; else e.Effect = DragDropEffects.None; } But even when e.Effect = DragDropEffects.None happens, mouse cursor shape stays like DragDropEffects.Move. I am missing something? -- Semper Fidelis Adam Klobukowski atari@gabo.pl Tag: TypeConverters IsValid method not getting called Tag: 98010
  - 17
    - how VB.NET to generate excel report(office 2003) how VB.NET to generate excel report(office 2003) what component i need to reference into the asp.net application and the application will distribute to the client , does it free? Tag: TypeConverters IsValid method not getting called Tag: 98002
  - 18
    - CurrentCell cannot be set at this time. Moving ??? Hi guys, I have a small problem. When I assing values for some of the rows I am getting this error message ? grdQuantities.Item(row, col) = "NI" Additional information: CurrentCell cannot be set at this time. Moving your code to FormLoad should solve this problem. how do i solve this ? please help Thanks -Aruna Tag: TypeConverters IsValid method not getting called Tag: 97998
  - 19
    - A Java implementation of CLR? Hi, Is it possible to make such a gift so that MSIL programs can run on JVM? Tag: TypeConverters IsValid method not getting called Tag: 97995
  - 20
    - MAskedTextBox Custom Mask Hello, I am implementing a MaskedTextBox control in a Windows Form application. The valid userâ??s input is : [1-9] , namely: a single, numeric character, excluding the digit ZERO (0). Using a numeric mask (â??#â??, â??0â??, or â??9â??) does not provide the answer, since these masks do allow enreing ZERO (0). Any idea how to implemt it? Thanks! Shaul Sondak Tag: TypeConverters IsValid method not getting called Tag: 97983
  - 21
    - Client Requirements? I'm trying to find a site that will tell me exactly what the requirements from a OS perpective is required to run a .net 2005 smart client windows application from the clients machine. I know the developers machines need XP SP2 to install the IDE, but with the clients running the application do they only need the 2.0 framework and it doesn't matter if XP SP2 is installed or not. Tag: TypeConverters IsValid method not getting called Tag: 97982
  - 22
    - VB.NET Screen rendering issues. Folks, We have written a VB.NET application with Access database. When we open any screen (Form) all the text fields and grids (we are using ComponentOne TrueDB Grid) and some other controls render as a "hole" and then once all the data is retrieved then the complete screen rendering is done. We tried to hide all the controls before it loads all the data and then show all the controls once the data is retrieved but it still does that empty control ghosting display issue. Because of this the application appears to slow even though the screen load time is just 3-4 seconds. Has somebody faced this kind of issue before? Does anyone have any recommendations? Thanks, D Tag: TypeConverters IsValid method not getting called Tag: 97979
  - 23
    - Wierd sorting in DataGridView I have a DataGridView control on a form which is bound to a class that is derived from CollectionBase and implements IBindingList. This works okay except that the sorting acts really strangely in certain situations. To sort my class I implement IBindingList.ApplySort and in the method I use CollectionBase.InnerList.Sort and pass it an instance of a class that implements IComparer to sort the data objects in my list. The implementation of the IComparer.Compare method is relatively straightforward: object a = MyType.GetProperty(PropertyName).GetValue(x, null); object b = MyType.GetProperty(PropertyName).GetValue(y, null); if (a != null && b == null) return 1; if (a == null && b != null) return -1; if (a == null && b == null) return 0; return ((IComparable)a).CompareTo(b); Now this sort of works okay. For example, if my data object has properties a, b, and c which are displayed on the DataGridView like this: a b c 100 1 1 90 2 1 80 3 1 70 4 1 60 5 1 50 6 1 40 7 1 And I click on the header for row a I get this: a b c 40 7 1 50 6 1 60 5 1 70 4 1 90 3 1 90 2 1 100 1 1 And if I click it again I get back to the original. So far so good. If I click on column b, I get the expected behavor too. However, if I click on column c (where all the values are the same) I get this: a b c 60 5 1 50 6 1 40 7 1 70 4 1 100 1 1 90 2 1 80 3 1 Clicking a second time gets me to the second table above. Clicking a third times gives me this: a b c 80 3 1 90 2 1 100 1 1 70 4 1 40 7 1 50 6 1 60 5 1 And finally, clicking a fourth time gets be back to the original order. Does anybody have any idea what is going on here and how I can avoid it? This doesn't seem to ever happen if I use a DataTable as a data source. Tag: TypeConverters IsValid method not getting called Tag: 97978
  - 24
    - Business Object Model Did a little searching on Google for business object model in vb.Net but didn't find much. Anyone have some links and samples for this and as a last resort, a book title? I need to start at the bottom... Thanks, Brian Tag: TypeConverters IsValid method not getting called Tag: 97972
  - 25
    - Control Flicker while switching TabPage Hello, I created a windows form with vs.net 2005 / c#. This control has a TabControl with 16 TabPages. On every TabPage there are a diffrent number of Controls. - Every TabPage has a background picture. they are all the same picture (from a resouce file). There seems to be no way easy to make a TabControl transparent... my problem: while switch the visible TabPage the form / TabControl begans to flicker. it takes a second (and I mead "1 sec") before all controls of the TabPage are drawed. I can see, who one control after another appears. - while switching there is only standard code executed, no code written by me. has anybody an idea how to remove the flicker? thank you ingo beyer Tag: TypeConverters IsValid method not getting called Tag: 97966

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.

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