Determining when a form or child control is activated

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  - 1
    - Background Form I have a form that I open with ShowDialog(). I have a background form that I initially open to make a background behind the user input form. The code is like this: static Form BackForm=null; public bool InputMethod() { if(BackForm==null){ BackForm = new Form(); // set up backform and make it maximized. BackForm.Show(); } Form InputForm=new Form(); // set up the input form here. InputForm.ShowDialog(BackForm); } This basically works the way that I want it to, I call InputMethod() a bunch of times, it puts up the BackForm once, then the smaller InputForm comes and goes for input. The problem is that BackForm does not behave properly in Windows, if you minimize InputForm, BackForm is still there, and does not minimize, and can not be minimized. Is there a way to do this? Is there something like an OnMinimize event that I could override for InputForm, and minimize BackForm in it? Or a better way of having a background that does not flicker between InputMethod() calls, without InputForm being maximized? Thanks for any suggestions. Tag: Determining when a form or child control is activated Tag: 113876
  - 2
    - Toolstrip and MDI application I am trying to get write an MDI application running using the ToolStrip control(s). I have the application running with types of two form. Each form represents a type of document. Each has its own custom menus and toolbars. The MDI application runs up and I create new documents of each type. When a form is activated, dot net merges the menus and the app I merge in the toolbars using RevertMerge and Merge. One of my forms has about 6 toolbars, the other has 2. When I switch between the two document type, the toolbars change position; I activate form1, move the toolbars using the mouse, activate form2, then switch back to form1- the toolbars have moved. I am also having problems saving and restoring the positions of the toolbars using ToolStripManager.LoadSettings and ToolStripManager.SaveSettings. This showing the same behaviour (although it may be caused simply by switching between the windows). Has anyone successfully implemented an MDI app using these controls? I have a test app if anyone would like to see it - where the best place to post it? Paul Wardle Tag: Determining when a form or child control is activated Tag: 113857
  - 3
    - Treeview loading slow. I have an explorer type app that when I need to update the tree, it takes about 30 seconds. This is a bit annoying. Is there any way to speed up the treeview ? Tag: Determining when a form or child control is activated Tag: 113854
  - 4
    - TreeView flickering while searching nodes Hi, I see a lot about TreeView flickering while adding nodes to a treeview control, but not really about what I'm experiencing. I'm adding nodes to a TreeView control, but first, to ensure I don't already have a node somewhere in the tree with the same name, I perform a recursive search of the nodes for nodes containing a specified text value. The TreeView control flickers while searching the nodes. I've tried using .SuspendLayout() and .ResumeLayout() before and after each search is initiated, but it still flickers. Any ideas on how I can keep the control from flickering while searching the nodes? Thanks, Charlie Tag: Determining when a form or child control is activated Tag: 113847
  - 5
    - MFC vs .NET Hi All, Can someone explain me the difference between doing GUI programming using MFC vs .NET winforms? I want to understand what is the difference between these 2 technologies in terms of following parameters: 1) performance 2) ease in programing 3) usability 4) size of the executable 5) future support of the technology Thanks Burks Tag: Determining when a form or child control is activated Tag: 113846
  - 6
    - Splitter Vs. SplitContainer in MDI Applications Hello, I'm reading through Chris Sells & Michael Weinhardt's Windows Forms 2.0 Programming book, and finding it incredibly useful as a quick- reference manual. Reading up on the Splitter & SplitContainer controls, they mention that "you may need to use the pre-Windows Forms 2.0 Splitter control for MDI applications." Browsing through their MDI application chapter, I see no further mention of the Splitter or SplitContainer. Under what conditions would you need to use a Splitter rather than a SplitContainer? Thanks, Evan Tag: Determining when a form or child control is activated Tag: 113843
  - 7
    - Create a control hi, I am using Visual Studio 2005 to develop a Windows Form Application in C++. My form has some controls like picturebox, label, and so one. But I need to create a class where I would save other things. I created the class and its instance but when I try to add this instance like a control to my form, I got an error. Someone can helps me? What can I do to deal with this instance like a control? thanks a lot Tag: Determining when a form or child control is activated Tag: 113842
  - 8
    - Printing Issue I have one printer attached on COM1 and one on LPT1.i have to direct some poriton of date to com1 and some to LPT1.if i am using directly port than it will disturb alignment and also not cutting page.If i m using printer object than it is cutting ok and alignment is also ok.But here problem is when i change the default printer runtime it will not direct data to the printer that is secondly selected.It direct all the data to the printer that first settted. Tag: Determining when a form or child control is activated Tag: 113841
  - 9
    - Printing issue(Urgent) I have one printer attached on COM1 and one on LPT1.i have to direct some poriton of date to com1 and some to LPT1.if i am using directly port than it will disturb alignment and also not cutting page.If i m using printer object than it is cutting ok and alignment is also ok.But here problem is when i change the default printer runtime it will not direct data to the printer that is secondly selected.It direct all the data to the printer that first settted. Tag: Determining when a form or child control is activated Tag: 113840
  - 10
    - Property grid, directory browse functionality Hi! How can I implement Directory Browse functionality in the PropertyGrid control similar to BackgroundImage or Icon in VS 2005 ? I can not find any info on that. May be I should be more generic and ask how I can lunch a custom form from the PropertyGrid control ? I searched for it with no result. Any idea/sample/url is greatly appreciated. Many thanks in advance, Tag: Determining when a form or child control is activated Tag: 113834
  - 11
    - Minimize Window in IE 7 When I minimize a window in IE 7 I am unable to maximize by clicking on bar at bottom. Just get a beep when I click. This seemed to start a couple of weeks ago. Tag: Determining when a form or child control is activated Tag: 113832
  - 12
    - Drag and Drop events not firing Ok, this is the first time I've tried a serious use of Drag and Drop. As a test, I first defined 2 instances of a very basic user control on a form. The user control had one string type public property. All the dragdrop event handlers needed were defined automatically by VS from the individual instances (MouseDown, MouseMove, DragEnter, DragDrop). (This was all based on that article http://msdn2.microsoft.com/en-us/library/aa289508(VS.71).aspx - Implementing Drag and Drop in VisualBasic.Net) This test worked fine. (I also went back and assigned a panel as the 2 usercontrols parent. It still works.) Now in the real application, what I want to do is dynamically define a number of usercontrols based on the data and attach them to a panel. In other words, define a loop and for each record: Dim x as new UserControl1 -- define it's properties -- Attach the event handlers AddHandler x.MouseDown, AddressOf ControlMouseDown AddHandler x.DragDrop, AddressOf ControlDragDrop AddHandler x.MouseMove, AddressOf ControlMouseMove AddHandler x.DragEnter, AddressOf ControlDragEnter Now the event handlers aren't firing, not even MouseDown. I've set the AllowDrop property of each control instance to True. What else could I be forgetting? Tag: Determining when a form or child control is activated Tag: 113830
  - 13
    - OnSetCursor Hi, I'm extending an MFC app with a .NET control and i want it to respond to ::SetCursor, is this possible? Actually, i want the control to ignore the SetCursor call and pass it on to it's parent. thanks, Steve Tag: Determining when a form or child control is activated Tag: 113828
  - 14
    - WinForm with Dynamic Controls and Model View Presenter Hi, I have a WinForm control that has a tab control on it as its only control. In the code I am dynamically adding controls to the tab control dynamically. You could picture a page that gets populated with questions with either radio buttons for choices, or perhaps combo boxes whose items come from the database. All of these controls are placed on the tabs depending on answers to questions - so if you answer "yes" to question "A" for example, then another question may appear on this same tab, or a new tab may be added and have additional questions on it. I am looking at doing this all using the Model View Presenter pattern and was wondering if anyone had done anything like this before? I am not sure what the best design might be to pass the controls and data to the View as the controls will have to be "added" to the tab control. If anyone has done anything like this and has any recommendations, I would be appreciative to hear about designs. Also, I don't know if there would be any benefit from doing this using WPF instead of .net 2.0 WinForms. Any thoughts about this would be appreciated as well. thanks in advance! Bill Tag: Determining when a form or child control is activated Tag: 113826
  - 15
    - Use an icon inside a WinForm? I'd say it's a dumb question... But so far I haven't been able to find a way: I have some .ico... is there a way to use it INSIDE a WinForm? Like a simple bitmap, but choosing which resolution (index) I want to display? Thanks a lot. -- ____________________________ Carlos Sosa Albert Tag: Determining when a form or child control is activated Tag: 113825
  - 16
    - Urgent - Controls on a form Hi, I am using Visual Studio.net 2005 to develop Windows Form applications in C++. My application is a Multiple Document Interface. For each form opened I would like keep the controls (like picturebox, buttons) but also other informations (another kind of information - like and iplimage from the OpenCv Library) For the first part, I need just to do "form's name" -> Controls -> Add(""control's name"); How do I associate a class to a form? Imagine my class is one which derive from another called Mdi //File: OpenImage.h ref class Figura : public MDI { public: IplImage * srs; } //File OpenImage.cpp #include "OpenImage.h" Form ^Image = gcnew Form(); PictureBox ^pb = gcnew PictureBox(); pb->Image = Image::FromFile("lena.jpg"); Image->Controls->Add(pb); Figura ^ImageCV = gcnew ImageCV; ImageCV->src = cvLoadImage("lena.jpg", 1); And now, how can I say that this class ImageCV must be added to the form Image? Any help will be very appreciated. Thanks Tag: Determining when a form or child control is activated Tag: 113823
  - 17
    - XSLT Editor Control Hi, Anyone know any XSLT editor control to use in .net windows desktop applications? Thanks Shan Tag: Determining when a form or child control is activated Tag: 113821
  - 18
    - Clickonce: keep data files on uninstall? Hi, I'm getting my first ClickOnce app ready for prime time, but there's still one thing bothering me: At this moment I'm using |DataDirectory| to point to the SqlCe database. The database itself is marked as "data file". However, when I uninstall my ClickOnce app the SqlCe database is also removed. What are my options to prevent this? Isolated storage? What would be my connection string like? Steven - - - Tag: Determining when a form or child control is activated Tag: 113820
  - 19
    - Location of Taskbar (Top, Bottom, Left or Right) I'm trying to figure out the location of the taskbar (top, bottom, left or right). I am creating an owner drawn tooltip for a NotifyIcon and trying to figure out where to position the form when the user hovers over the NotifyIcon in the system tray. Is there another way to approach the issue of the form placement? Thanks in advance, Terry Tag: Determining when a form or child control is activated Tag: 113819
  - 20
    - scaling UI (higher resolution => bigger buttons + bigger font) I want to create a UI with Windows Forms that should scale with the resolution. It's some sort of demonstration UI to be used on presentations. For example: my application is always maximized and lets say it contains 4 big buttons (in 2 rows and 2 columns) that completely fill the screen. When it runs on a 800x600 screen it should fill all space. When it runs on a 1600x1200 screen it should also fill all available space. I have already used a tableLayoutPanel but this only scales the controls, not the font. Is the tableLayoutPanel the right tool for this job? And can it also dynamically change the fontsize? Tag: Determining when a form or child control is activated Tag: 113818
  - 21
    - change location of control Hi all, I have a form that inherits from another form. I want to change the location of a specific control. For this I have a method in the base form which does only this: public virtual void SetLocation(int x, int y) { myControl.Location = new Point(x, y); } I call this method from the inheriting form, like this: base.SetLocation(0, 0); It doesn't work. The control's location changes but not to (0,0). When I call this method from inside the base form it does work(changes to 0,0). It looks like the inheriting form can't touch some certain area. Can anybody explain to me what may cause this issue, and how to solve it? Thank you very much Tag: Determining when a form or child control is activated Tag: 113814
  - 22
    - Audio Restoration Hi! All we have working with "Audio Restoration" application, in that application we need to develop .avi files noise clarification using "audio restoration" software. First we need to download .avi files from cam to PC drivers, then we apply "audio restoration" software and do the audio process. After that we need to save the .avi files in same location in PC hard drive and also copy the restored files back to the camera over-writing the unprocessed file. So we need to develop the "Audio Restoration" software. Is this requirement fullfiled by using ASP.Net 2.0 framework. Please tell us any information about our application requirement. Thanking you. Regards, Development team. Tag: Determining when a form or child control is activated Tag: 113813
  - 23
    - DllImport issue! Hi All, I have a dll created using vc++(Unmanaged).So when we are using this I have to give to full path of this dll as a parameter of DllImport attribute. The parameter takes only const string value. It will work fine by hard coding, but what will be case when I deploy this project? Is there any way to pass the relative path of dll to the DllImport attribute?? Let me know if more clarification is required about the problem.!!! Thanks in advance! Chandan Kumar Tag: Determining when a form or child control is activated Tag: 113803
  - 24
    - Embed Form in TabPage Can somebody provide an example on how to embed a form in a TabPage. I have a bunch of tabPages that behave pretty much the same, so I created a base form with the basic functionality and from there I am going to create instances of that base form and embed them in TabPages, is it possible? TIA Tag: Determining when a form or child control is activated Tag: 113802
  - 25
    - Cannot bind to the property or column on the DataSource. I'm trying to use the following code to do a very simple databind to a combobox on a Windows Form. I keep getting the error shown in the code. Can anyone tell me what I'm doing wrong? Thanks. Public Sub CreateDataSetsInitializeBindings() Dim dsCompany As New DataSet 'create datasets dsCompany = CreateDataSetCompany() 'initialize bindings frmRoute.cboCompanyID.DisplayMember = "cmpCompanyID" frmRoute.cboCompanyID.ValueMember = "cmpCompanyID" frmRoute.cboCompanyID.DataSource = dsCompany frmRoute.cboCompanyID.DataBindings.Add("SelectedValue", dsCompany, "cmpCompanyID") *** this line returns the error: Cannot bind to the property or column cmpCompanyID on the DataSource.Parameter name: dataMember*** 'clear objects dsCompany = Nothing End Sub Public Function CreateDataSetCompany() As DataSet Dim daCompany As New OleDb.OleDbDataAdapter() Dim dsCompany As New DataSet 'Execute the SQL daCompany = New OleDb.OleDbDataAdapter("SELECT * FROM Company", cnn) 'fill the dataset daCompany.Fill(dsCompany, "Company") 'return the dataset CreateDataSetCompany = dsCompany 'clear the objects daCompany = Nothing dsCompany = Nothing End Function Tag: Determining when a form or child control is activated Tag: 113800
- Next
  - 1
    - Application deployment Hi there, I am nearing completion of my first real project in .NET and I'm looking at the various deployment options. The clickonce alternative seems like the ideal option for us, but my solution contains sevreal projects which make up 2 .exe files and a few .dll s which must be included in the installation. It would appear that clickonce deployment only applies to a single solution file, is there any way to combine multiple exe files into a single clickonce installation that will take advantage of the autoupdate feature? I have made a deployment project and that seems to work fine, but I really need the update procedure of clickonce and if possible want to avoid any major changes to the project at this stage. Any help/suggestions are very much appreciated. Kind regards Darren Sim Tag: Determining when a form or child control is activated Tag: 113798
  - 2
    - DllImport issue for relative path! Hi All, I have a dll created using vc++(Unmanaged).So when we are using this I have to give to full path of this dll as a parameter of DllImport attribute. The parameter takes only const string value. It will work fine by hard coding, but what will be case when I deploy this project? Is there any way to pass the relative path of dll to the DllImport attribute?? Let me know if more clarification is required about the problem.!!! Thanks in advance! Chandan Kumar Tag: Determining when a form or child control is activated Tag: 113795
  - 3
    - DllImport issue for relative path! Hi All, I have a dll created using vc++(Unmanaged).So when we are using this I have to give to full path of this dll as a parameter of DllImport attribute. The parameter takes only const string value. It will work fine by hard coding, but what will be case when I deploy this project? Is there any way to pass the relative path of dll to the DllImport attribute?? Let me know if more clarification is required about the problem.!!! Thanks in advance! Chandan Kumar Tag: Determining when a form or child control is activated Tag: 113794
  - 4
    - Using ComboBox in DataGridView with custom classes as datasource Hello. I'm working on a telephone directory lookup for an application and have a custom class I would like to show in a datagridview. The problem is that a person might have more than one mobile phone registered, but the application expects only one, so the user will have to choose one. My idea was to use a DataGridViewComboBoxColumn in a datagridview to let the user choose one of the phone numbers. This is the class: public class PersonInfo { private string _name; private string _address; private string _workPhone; private string _homePhone; private string[] _mobilePhone; public PersonInfo(string name, string address, string workPhone, string homePhone, string[] mobilePhone) { this._name = name; this._address = address; this._workPhone = workPhone; this._homePhone = homePhone; this._mobilePhone = mobilePhone; } public string Name { get { return _name; } } public string Address { get { return _address; } } public string WorkPhone { get { return _workPhone; } } public string HomePhone { get { return _homePhone; } } public string[] MobilePhone { get { return _mobilePhone; } } } The problem is getting the numbers in the MobilePhone property to show up. Is this at all possible? Does anyone have some idea of how to do this? Tag: Determining when a form or child control is activated Tag: 113792
  - 5
    - How to disable Start menu or prevent it to open? Hi, I need an app to run in kiosk mode, so user will not have access to start menu and taskbar while the app is running I was able to hide / show the taskbar with the following code when app starts / exits [DllImport("user32.dll", EntryPoint = "FindWindowA")] static extern int FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll")] static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags); const int SWP_HIDEWINDOW = 128; const int SWP_SHOWWINDOW = 64; static public void HideTaskbar() { int intReturn = FindWindow("Shell_traywnd", ""); SetWindowPos(intReturn, 0, 0, 0, 0, 0, SWP_HIDEWINDOW); } static public void ShowTaskbar() { int intReturn = FindWindow("Shell_traywnd", ""); SetWindowPos(intReturn, 0, 0, 0, 0, 0, SWP_SHOWWINDOW); } But users still can access the start menu with Windows button (or Ctrl +Esc) Is there any way to disable start menu too? Thank you Tag: Determining when a form or child control is activated Tag: 113788
  - 6
    - Help - Sudden crashes while editing DataGridView properties! I have a fairly large winforms project, VB/Dot Net 2.0. While in the midst of fairly routine editing I have suddenly found myself unable to click on the 'Choose Data Source' dropdown of DataGridView Tasks without crashing Visual Studio. This goes for all DataGridViews within the project and only this one project. It does not matter if the the DataGridView has been setup already or if it has just been put on the form. I am able to edit DGVs normally in other projects. I have also tried rebuilding the solution and even rebooting. Nothing works. (One of my co-workers has just suggested that the solution itself is corrupt and I should try creating an entirely new solution and copying over individual files. I'll probably do that.) Tag: Determining when a form or child control is activated Tag: 113787
  - 7
    - Drawing tabs in ListBox.DrawItem event I have a ListBox, and have changed the DrawMode to DrawMode.OwnerDrawFixed. I'm using the ListBox.DrawItem event to do some custom coloring in my ListBox object. My item strings contain tabs, but after drawing the items myself, the tabs are not intepreted. Currently I'm just using the sample code given in the MSDN docs for the event handler: ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- private void listBox1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e) { // Set the DrawMode property to draw fixed sized items. listBox1.DrawMode = DrawMode.OwnerDrawFixed; // Draw the background of the ListBox control for each item. e.DrawBackground(); // Define the default color of the brush as black. Brush myBrush = Brushes.Black; int mod = e.Index % 3; // Determine the color of the brush to draw each item based on the index of the item to draw. switch (mod) { case 0: myBrush = Brushes.Red; break; case 1: myBrush = Brushes.Orange; break; case 2: myBrush = Brushes.Purple; break; } // Draw the current item text based on the current Font and the custom brush settings. e.Graphics.DrawString(listBox1.Items[e.Index].ToString(), e.Font, myBrush,e.Bounds,StringFormat.GenericDefault); // If the ListBox has focus, draw a focus rectangle around the selected item. e.DrawFocusRectangle(); } ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- As I mentioned, my items contain tabs, and when I intercept this event, my strings look like this: "Name\taddress\tetc..." Also, in case it matters, I'm setting my own tab stops in the list box: ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- private void SetDeviceListTabStops() { // A tab-stop location of 4 equates to the width of one average character for the specified font int[] listBoxTabs = new int[] { 20, 75, 110, 160 }; // Send an LB_SETTABSTOPS message to the ListBox control. int result = SendMessage(this.listBox1.Handle.ToInt32(), LB_SETTABSTOPS, listBoxTabs.Length, ref listBoxTabs[0]); // Refresh the List Box control. this.listBox1.Refresh(); } ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Anyone know what I need to set in order for the tabs to be drawn/interpretted? Tag: Determining when a form or child control is activated Tag: 113785
  - 8
    - Problem rendering metafile text on bitmap. Hi, I have a problem with the quality from metafiles rendered on a System.Drawing.Bitmap. In particular, text is drawn poorly. If the same metafile is rendered directly onto a form's drawing surface, the quality is fine. There's also a problem with scaling, with a difference in size between the bitmap and directly drawn versions. The code below illustrates the problem. It draws a string three times. The top one is the string drawn directly on the form. The middle one is from a metafile (with the string drawn onto it) drawn directly onto the form. The bottom one is from the same metafile, rendered onto a bitmap, which is then drawn onto the form. Top two look fine, bottom one not so good. Any ideas what I'm doing wrong? Thanks, Chris. Bitmap bitmap; Metafile metafile; private void button1_Click(object sender, EventArgs e) { using (Graphics formGraphics = CreateGraphics()) { IntPtr handle = formGraphics.GetHdc(); metafile = new Metafile(handle, EmfType.EmfOnly); formGraphics.ReleaseHdc(); using (Graphics metaGraphics = Graphics.FromImage(metafile)) { metaGraphics.DrawString("Test string", new Font("Arial", 14), Brushes.Black, new PointF(0, 0)); } bitmap = new Bitmap(400, 100); bitmap.SetResolution(formGraphics.DpiX, formGraphics.DpiY); using (Graphics bitmapGraphics = Graphics.FromImage(bitmap)) { bitmapGraphics.DrawImage(metafile, new Point(0, 0)); } formGraphics.DrawString("Test string", new Font("Arial", 14), Brushes.Black, new PointF(0, 0)); formGraphics.DrawImage(metafile, new Point(0, 50)); formGraphics.DrawImage(bitmap, new Point(0, 100)); } } Tag: Determining when a form or child control is activated Tag: 113784
  - 9
    - What are my options for implementing a horizontal drag/drop contro I have an interesting problem. I have a set of records in a data table organized by a simple key. What I want to do is represent these records as icons on a horizontally oriented control in asending order. Furthermore, I want to be able to use this display to reorganize the order of the records in the data table. i.e. If the control is displaying item1, item2, item3, I want to be able to select item2 and drag it to the left so that the new order in the data table is item2, item1, item3. Also I want the control to have horizontal scrolling capability because there will almost certainly be more than a few of these items. I have some old code that I might be able to adapt but I'd like to see other options. Any ideas? Tag: Determining when a form or child control is activated Tag: 113774
  - 10
    - Missing Record in Crystal Report I have a Crystal Report, which DataSource is made up of 2 tables, 1 Header table and 1 Detail table. The Detail table contains extra details of the items in the Header table. Not all Header items has a record in the Detail table. As for my Crystal Report, I'm grouping the records by the Header table's primary key (which is linked to the Detail table). I discovered that for those items that does not have a record in the Detail table, it wont show up in my Crystal Report. What should I do to let those record appear? Tag: Determining when a form or child control is activated Tag: 113767
  - 11
    - Binding DateTimePicker question Hello, I thought that my DateTimePicker was bound to my binding source in my entry form, but it does not behave as though it were. Here is the AutoGenerated code for that control: // modifiedDateDateTimePicker // this.modifiedDateDateTimePicker.DataBindings.Add(new System.Windows.Forms.Binding("Value", this.bsMTask, "ModifiedDate", true)); this.modifiedDateDateTimePicker.Enabled = false; this.modifiedDateDateTimePicker.Location = new System.Drawing.Point(129, 366); this.modifiedDateDateTimePicker.Name = "modifiedDateDateTimePicker"; this.modifiedDateDateTimePicker.Size = new System.Drawing.Size(200, 20); this.modifiedDateDateTimePicker.TabIndex = 25; Here is exception text that is returned when I get the error: "Column 'ModfiedDate' does not allow nulls." ************** Exception Text ************** System.Data.NoNullAllowedException: Column 'ModifiedDate' does not allow nulls. at System.Data.DataColumn.CheckNullable(DataRow row) at System.Data.DataTable.RaiseRowChanging(DataRowChangeEventArgs args, DataRow eRow, DataRowAction eAction, Boolean fireEvent) at System.Data.DataTable.SetNewRecordWorker(DataRow row, Int32 proposedRecord, DataRowAction action, Boolean isInMerge, Int32 position, Boolean fireEvent, Exception& deferredException) at System.Data.DataTable.InsertRow(DataRow row, Int32 proposedID, Int32 pos, Boolean fireEvent) at System.Data.DataView.FinishAddNew(Int32 currentIndex, Boolean success) at System.Data.DataRowView.EndEdit() at System.Windows.Forms.CurrencyManager.EndCurrentEdit() at System.Windows.Forms.BindingSource.EndEdit() at HIP2007.AddEditMasterTask.btnSave_Click(Object sender, EventArgs e) in M:\HIP2007\HIP2007\Dialogs _ CurrentWork\AddEditMasterTask.cs:line 92 at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) I thought that the default value of the DateTimePicker was the value that is displayed in the control - the current datetime. BTW I have disabled this control from user interaction so that it will behave as read only. What do I do so that today's datetime is by default put into the control so I do not receive this error? Thank you. Doug Tag: Determining when a form or child control is activated Tag: 113766
  - 12
    - Catching mouse events on all child controls Greetings, I've already tried googling for the following problem, but it seems every solution I've found is too complex and error prone. I've got a control (Panel) that acts as a container for several other controls. These controls, in turn, have several other controls and so on. I wish to be notified whenever the mouse is hover the area defined by the container control, regardless of its children. OnMouseEnter and OnMouseLeave triggers as soon as the mouse enters/leaves a child control, so I can't use them. Same applies for OnGotFocus/OnLostFocus. One solution would be to hook upon all events in every child control. Despite the resulting complexity of event triggering (and the fact that some controls can simply override the events I'm listening for and inhibit them), the controls I'm using can (and will) change in run- time (we are talking about adaptative interfaces here); this would probably mean that I also need to hook upon the ControlAdded and ControlRemoved events. So my question is simple: is there any "clean" way for a control to know that a mouse is in its area (ClientRectangle)? I don't mind if the solution involves WndProc... Best regards and thanks in advance, Hugo Ferreira Tag: Determining when a form or child control is activated Tag: 113765
  - 13
    - Very weird RichTextBox bug I have tried to make a simple sample of this - but the simple samples all work. The basic problem is I create a RichTextBox and then call RichTextBox.LoadFile() to load a rtf file in it. If the file has an image in it - the control displays nothing and RichTextBox.Text returns "". If I do the same thing in my simple sample program, it all works fine. Where it does not work I have a Word AddIn (IDTExtensibility2, not VSTO) that uses DevExpress for it's ribbon forms, etc. In it to display the rtf file I bring up a Form that has a RichTextBox in it and call LoadFile(). And if the rtf has an image in it I get a blank control. To try and recreate it I just did a plain old Windows form - no DevExpress and no Word AddIn. But that works fine. Has anyone ever heard of anything like this? -- thanks - dave david_at_windward_dot_net http://www.windwardreports.com Cubicle Wars - http://www.windwardreports.com/film.htm Tag: Determining when a form or child control is activated Tag: 113761
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    - Set the row background color according to a cell value Hi, At this time I'm able to set the background color of a cell depending on it's value. I'm able to achieve this by extending the DataGridTextBoxColumn class and overriding the Paint method: [code] protected override void Paint(System.Drawing.Graphics g, System.Drawing.Rectangle bounds, CurrencyManager source, int rowNum, System.Drawing.Brush backBrush, System.Drawing.Brush foreBrush, bool alignToRight) { if (internalHighlightInformation != null) { object objAtRow = GetColumnValueAtRow(source, rowNum); //(Values A, C and X are just an example, this values are set at run-time) if (objAtRow = "B" || objAtRow = "C" || objAtRow = "X") { backBrush = new SolidBrush(Color.Red); foreBrush = new SolidBrush(Color.White); } } base.Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight); } [/code] My problem now is, how can I do this to the full row? At this stage I know the row number, and the cell, but I don't have any access to the cells that exist in the same row :( (or do I?) Any ideas? I just cannot figure out how to do this... Thanks ahead for all the help. Best Regards, L. Pinho Tag: Determining when a form or child control is activated Tag: 113757
  - 15
    - Beginners question - DataGridView with a combo box column I have not tried this before. I have a fairly simple table bound to the grid itself and I want to make one of the columns a combo box. To this end I bound the grid to the first table and the column to a second. No matter what I try, I keep getting 'DataGridViewComboBoxCell value is not valid.' How does one normally set up an arrangement like this and how do I begin troubleshooting this? Tag: Determining when a form or child control is activated Tag: 113756
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    - I need to be able to trap when the user clicks on a Web Browser control. So the .NET 2.0 web browser control does not provide a MouseDown or Click event handler, but I have a need to trap on this. I would like to know the best approach to accomplish this. I see Enter and Leave event handlers on the control and I have tried to trap on these and then check the MouseDown event on the parent, but this doesn't seem to work. Is there an approach I can use with API calls. I don't require an 100% managed solution. Thanks. Tag: Determining when a form or child control is activated Tag: 113754
  - 17
    - ListView - one column Hi everybody, I want to have a ListView which has only one column and all the items have the width of the listview (that is, no room fro subitems since i don't need them). It may sound like a ListBox, but I need to have ListViewItems and not objects in the control. Thanks in advance, -- Mihai TÄ?tÄ?ran H.P.C. Consulting www.hpc-consulting.ro Tag: Determining when a form or child control is activated Tag: 113752
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    - Component Designer A great problem on VS2005. After I dropped an object on the design area of a component, it does not maintain the position assigned. All objects, after closing and reopening the designer, move on the left of the area. It's hard to work in this situation. VS2005 SP1 resolves the situation? Please, help me!! Loris Tag: Determining when a form or child control is activated Tag: 113746
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    - Component Designer A great problem on VS2005. After I dropped an object on the designer area, it does not maintain the position assigned. All objects, after closing and reopening the designer, move on the left of the area. It's hard to work in this situation. VS2005 SP1 resolves the problem? Help me please! Loris Tag: Determining when a form or child control is activated Tag: 113744
  - 20
    - Exceptons when debugging My VB 2005 winforms application has an Application.ThreadException handler to catch any unhandled exception. When debugging, the debugger doesn't stop when I get an exception, control passes to my application exception handler. Currently I comment out the handler to be able to get the debugger to stop when an unhandled exception occurs. Ideally I would like to have the debugger stop when any exception occurs, then optionally be able to proceed by having the exception bubble up. Is this possible? Tag: Determining when a form or child control is activated Tag: 113741
  - 21
    - PictureBox.Load and animated GIFs Loading an animated GIF using PictureBox.Load causes an ObjectDisposedException with the message "Cannot access a closed file" to be thrown in the FileStream.Read method ultimately called by ImageAnimator.UpdateFrames. Looking at the output from ILDASM, it seems that the underlying file stream is being disposed in the PictureBox.Load method. However, KB article 814675 states that the stream must not be destroyed for the lifetime of the image. Can anyone shed some light on whether the .NET framework really is closing the stream before the image is finished with. Thanks Tag: Determining when a form or child control is activated Tag: 113739
  - 22
    - ClickOnce xamlparse error Hi I was trying to use ClickOnce in VS2008 beta2 for my WPF application but got error after I ran the setup.exe. Error signature: ... P9: system.windows.markup.xamlparse Any thoughts? -- Leon Tag: Determining when a form or child control is activated Tag: 113738
  - 23
    - Autocomplete textbox with dynamic datasource I know how to use autocomplete with 2.0 framework on a textbox. I also know how to use COM interop to use the IAutoComplete interface directly. But with either approach I seem unable to change the list while the user is typing. I have an XML document and i want the user to be able to navigate to nodes by typing in an XPath. i.e. when the user types /A it pops up with /Animals /Applications and when they type /Animals/ it pops up with: /Animals/Dog /Animals/Cat I do NOT want to prepopulate the whole list. However when using the .NET framework and changing the list I get an 'Access Violation' exception which is unacceptable. I tried to use the AutoComplete COM control (IAutoComplete) based upon this blog entry : http://jiangsheng.spaces.live.com/blog/cns!1BE894DEAF296E0A!732.entry Unfortunately the control doesn't 'ask' for an updated list of items as I type. I've tried all kinds of nasty tricks, like faking an 'Escape' key press but none are acceptable because of unwanted sideeffects. I essentially want the same behavior you get with the windows filename autocompletion, but I dont see how I can achieve this. I might just have to make my own autocomplete dropdown,but woudl rather not have to do that. Any suggestions? -andy Tag: Determining when a form or child control is activated Tag: 113730
  - 24
    - WebBrowser (loop automation) Hello, Background information â?¦. I have a VS2005 C# Windows forms app which has several text fields, one button control and one webbrowser control that I use to display an external webpage and based on the input data provided by the user, I perform some tasks on the webpage. The idea is to go automatically go through several web pages based in data captured by the user until I reach to a desired webpage. All this works fine, The user fills the data on the windows form, then clicks on the form's button and the process starts. The click method of this button does something like like â?¦ private void btnSendData_Click(object sender, EventArgs e) { Uri myUri = new Uri (http://www.externalwebsite/page1.htm); this.myWebBrowser.Url = myUri; this.stageSecuence = 1; } I use a variable named "stageSecuence" in the next method to perform some automated tasks depending on the webpage that is being processed. Then for the webbrowser control I have the following method: private void myWebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { switch (this.stageSecuence) { case 1: // perform some tasks like invoking the submit on the web page this.stageSecuence++; case 2: // perform some other tasks this.stageSecuence++; // and so on } Current situation, Now, instead of executing this automation on the webpage based on the data manually typed by the user; I want to call this process several times based on some database information. I wrote the following code to perfom a loop (hoping to call sereval times the automation process) for (int i = 0; i < this.numberOfTableRecords; i++) { // get record info Uri myUri = new Uri (http://www.externalwebsite/page1.htm); this.myWebBrowser.Url = myUri; this.stageSecuence = 1; } By doing this I only get the myWebBrowser_DocumentCompleted method executed only once for the last record of the loop; in fact this method is executed once the loop has finished. How can I get the DocumentCompleted method executed once for every record in the loop ? Can I call this method manually such as: this.myWebBrowser_DocumentCompleted( â?¦ ) ?? Thanks in advance, Cesar Tag: Determining when a form or child control is activated Tag: 113727
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    - Word 2007 symbols problem I recently got word 2007 on my windows vista computor and no matter what I do when i push the slash/question mark it puts a french e in it's place. Tag: Determining when a form or child control is activated Tag: 113726

Sorry if this is a really dumb question.

I have an application with various forms The forms may be shown using Show
or ShowDialog but my also be re-parented to a control in another form (e.g. a
Windows Forms Panel).

What I'm trying to do is find some reliable way to determine when a form is
activated. I had thought that the Activated event would do what I needed but
I don't get that event to ever fire. I derived a form from
Windows.Forms.Form to see if I could do something there but so far no luck
figuring it out.

Thanks in advance for any pointers or advice.

--
Neil

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