Q: How to highlit cell with changed value in DataGrid

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  - 1
    - Moving a control inside an Autoscroll Panel Hi, I need to create a control that the user may move within a panel. It works fine until I add it to a panel that has AutoScroll. The control has a transparent background, but I don't think it would be the problem. This is my actual code, most taken from web pages: > bool dragging = false; > int mousex, mousey; > > void DrawViewer_MouseUp(object sender, MouseEventArgs e) > { > if (dragging) > { > dragging = false; > Cursor.Clip = Rectangle.Empty; > this.Invalidate(); > } > } > > void DrawViewer_MouseMove(object sender, MouseEventArgs e) > { > if (dragging) > { > Point MPosition = ((ScrollableControl)this.Parent).PointToClient(MousePosition); > MPosition.Offset(mousex, mousey); > this.Location = MPosition; > //this.Invalidate(); > } > } > > void DrawViewer_MouseDown(object sender, MouseEventArgs e) > { > if (e.Button == MouseButtons.Left) > { > dragging = true; > mousex = -e.X; > mousey = -e.Y; > int clipleft = ((ScrollableControl)this.Parent).PointToClient(MousePosition).X - this.Location.X; > int cliptop = ((ScrollableControl)this.Parent).PointToClient(MousePosition).Y - this.Location.Y; > int clipwidth = ((ScrollableControl)this.Parent).ClientSize.Width - (this.Width - clipleft); > int clipheight = ((ScrollableControl)this.Parent).ClientSize.Height - (this.Height - cliptop); > Cursor.Clip = ((ScrollableControl)this.Parent).RectangleToScreen(new Rectangle(clipleft, cliptop, clipwidth, clipheight)); > //this.Invalidate(); > } > } I tried both overriding and handling the mouse events. I also thought at first the problem could be the Clip, but I finally discarded it. The main two problems are: 1) If you move the mouse fast, it starts mis-behaving. 2) If you go beyond the limits of the actual portion of the panel (when AutoScroll starts to work), the scrollbars start to go up and down, and the control gets out of control :-) Any ideas? Thanks in advance Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90117
  - 2
    - DbType vs SqlDbType I've been experimenting with various ways of "talking to the database" mainly a low maintenance way to switch between sql and access. I've finally got something a pretty comfortable with except for this why does this work ok param=new System.Data.SqlClient.SqlParameter(); param.DbType=paramType; param.ParameterName=paramName; param.SourceColumn=paramSourceColumn; param.Size=paramSize; and this does not //now this will give a compile error about converting to sqldbtype from dbtype System.Data.IDbDataParameter param=new System.Data.SqlClient.SqlParameter (paramName,paramType,paramSize,paramSourceColumn) ; //so now i typecast wich does compile ok but doesn't work System.Data.IDbDataParameter param=new System.Data.SqlClient.SqlParameter (paramName,(System.Data.SqlDbType)paramType,paramSize,paramSourceColumn) ; the first scenario works but it gives me concern that it may not be a good thing to do because otherwise i would expect an overload of the new SqlParameter to include dbtype Any explanation of what i'm missing would be greatly appreciated i've been messing with this for a couple of hours now -- Message posted via http://www.dotnetmonster.com Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90114
  - 3
    - UserPaint a TextBox - issue with WM_PRINT I am creating a custom textbox that requires me to handle the OnPaint mechanism. Currently, I am using WM_PRINT to draw the text in the textbox and am running into a problem. The text will never follow the font that is specified by the textbox, it is always the same no matter what I change it to. Is there some way to get WM_PRINT to use the font that the textbox is set with? I stripped down the code for my class to the following to show the issue: using System; using System.Windows.Forms; namespace TransTextBox { public class MyTextBox : TextBox { public MyTextBox() { this.SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer | ControlStyles.SupportsTransparentBackColor, true); } protected override void OnPaint(System.Windows.Forms.PaintEventArgs e) { System.IntPtr hdc = e.Graphics.GetHdc(); this.SetStyle(ControlStyles.UserPaint, false); try { const Int32 WM_PRINT = 0x0317; const long PRF_CLIENT = 0x00000004; Message m = Message.Create(this.Handle, WM_PRINT, hdc, new System.IntPtr(PRF_CLIENT)); this.WndProc(ref m); } catch { } finally { e.Graphics.ReleaseHdc(hdc); this.SetStyle(ControlStyles.UserPaint, true); } } } } I appreciate any help - thanks. Bob Dankert Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90112
  - 4
    - System.Configuration.AppSettingsReader This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C58A1E.1E392280 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable When I make changes to the config file, the changes are saved, but the = old values persist until I close the app and restart it. Is there a way = to reload the app.config file? Thanks, Brian ------=_NextPart_000_0006_01C58A1E.1E392280 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2668" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>When I make changes to the config file, = the changes=20 are saved, but the old values persist until I close the app and restart=20 it.  Is there a way to reload the app.config file?</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Brian</FONT></DIV> <DIV> </DIV></BODY></HTML> ------=_NextPart_000_0006_01C58A1E.1E392280-- Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90109
  - 5
    - How to change font, size and style of a label programatically I am trying to change a lables font at runtime. When I sent the labels font to New Font ("Andy",16,2) it wont allow be to set the style(2) If I remove the style it errors because the font does not support the style regular. This has to be easy....What am I doing wrong? Thanks Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90108
  - 6
    - want to avoid data selection in a datagrid cell hi all, iam populating a datagrid from a dataset. i set the readonly property of the datagrid to false. so i cant add and delete or change the data. but still i can select the data in every cell. when i click on the cell the data in the cell got selected. i want to avoid that. when i click on each cell i want to select the cell not the content. is there any way to do this ?? ... if i disabled the datagrid then i cant even select a cell. thanks in adavnce. waiting for a helpful reply. -- Deepson Thomas Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90106
  - 7
    - Specifying borders for a panel How can I do it so that I can specify which border I would like to appear on a panel? Say for example on a panel I want all sides except the right side to be drawn? Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90101
  - 8
    - FolderBrowserDialog won't accept the My Documents (or below) folder for the selectedpath I want to set the selectedpath in the folderbrowserdialog to a subdirectory of my "My Music" folder, yet allow the user to traverse higher than that in the directory if they want (in other words I don't want to set the root folder to this My Music, I want to set it to My Computer). But when I use a selected path that goes to My Documents or below, it doesn't accept it. Now what I mean by doesn't accept, it doesn't return an error, it just doesn't open up that node. When I try to drill down past my documents, it just leaves me at the root. It works fine (selectedpath) up to the point of my username (or other subdirs past my username other than my documents), then after that, doesn't. I'm thinking that maybe it's some type of ACL issue, but I can use directory.getdirectories to list the directories just fine. The code is as follows: Dim fb As FolderBrowserDialog = New FolderBrowserDialog fb.RootFolder = SpecialFolder.MyComputer fb.SelectedPath = "c:\documents and settings\danhi\my documents" fb.ShowDialog() This fails to expand any of the nodes in the display. If I replace the selectedpath with something like "c:\documents and settings\danhi\start menu" that works just fine. Anyone have any idea what my problem is? Dan Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90099
  - 9
    - how to write a text file in a web server I have a no touch deployment application. I'm trying to write a file to a web server by using webclient class' UploadFile method but I get an security exception. What should I do to overcome this exception? Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90097
  - 10
    - Topmost Tool Window Greetings, I have a vb.net app, and I have a tool window that I was to be topmost while the application is in focus, but not stay on top of other apps that get the focus. Basically, I want it to behave like the tool windows in Photoshop. How do I set the attributes to do this? Thanks for your help! Kevin Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90096
  - 11
    - Arrow Key behavior for a Textbox inside a DataGrid I have a DataGrid, with a custom ColumnStyle that displays a user control. The user control has several TextBoxes on it. I would like these TextBoxes to act like normal textboxes with regards to the arrow keys--right and left would move the cursor, holding down shift would highlight text, etc. I can inherit from TextBox, and override the ProcessCmdKey and do all this explicitly, but that seems a lot like re-inventing the wheel. Is there another way to do this that essentially just tells the DataGrid to treat the TextBox like a real TextBox? Thanks Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90095
  - 12
    - SystemTray Balloon Window suppressed with fullscreen apps? I read that the system tray balloon window will be suppressed when there's a fullscreen app running like a game or PowerPoint presentation. I've personally verified this behavior, but it doesn't seem to be smart enough to know that the task bar is on a second monitor. It just seems to check that a fullscreen app is running "somewhwere" and supresses the balloon notification. How do I suppress this behavior? I want the balloon windows to show whether there's a fullscreen app running or not. I'm using the NotifyIconEx C# control posted on CodeProject. It's pretty much a C# wrapper for the Shell_NotifyIcon() API call. I've looked at the common controls docs in MSDN and didn't see any flags or options in the NOTIFYICONDATA structure that would imply I could control that behavior. Any ideas? Or am I stuck with the default behavior? Thanks, Terry Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90094
  - 13
    - VB.Net 2003 with Zebra Barcode Printer on Network How do I print something to a Zebra Barcode Printer that is on a network (IP address)? The following code generates an error message (Invalid Handle) on line marked with *** Dim Texxxt As String Dim SA As SECURITY_ATTRIBUTES Dim outFile As FileStream, hPortP As IntPtr LPTPORT = "111.222.333.444" Texxxt = Me.RichTextBox1.Text hPort = CreateFile(LPTPORT, GENERIC_WRITE, FILE_SHARE_WRITE, SA, OPEN_EXISTING, 0, 0) hPortP = New IntPtr(hPort) 'convert Integer to IntPtr *** outFile = New FileStream(hPortP, FileAccess.Write, False) 'Create FileStream using Handle Dim fileWriter As New StreamWriter(outFile) fileWriter.Write("^NC^") fileWriter.Write("^XA^") fileWriter.Write("^FO50,50^A030,30^FD MyTest^FS") fileWriter.Write(Chr(34)) fileWriter.Write("^FO50,100^A030,30^FD UNITED STATES^FS") fileWriter.Write("^XZ^") fileWriter.Write(Chr(13)) fileWriter.Write(Chr(10)) fileWriter.Flush() fileWriter.Close() outFile.Close() retval = CloseHandle(hPort) Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90093
  - 14
    - Draft font printing Does someone know how to print draft font using plain c# (PrintDocument) ? or some 3 party NET component ? I have an Intermec termal printer and wuold like to print a small report using printer fonts (for barcode). I can do this easily with msaccess using a label and selecting installed intermec printer specific fonts. But these fonts doesn't seem to be available on c# (using Font class). Some hint ? Thanks in advance Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90088
  - 15
    - Autoscroll scrollbar thumb position being reset upon focus change Given the following Form with a panel with autoscroll set to true and with enough controls at different locations to cause autoscrolling to be visibly on, there is a slight annoyance with the behavior of the scrollbar upon switching focus to another window -- the scrollbar thumb position automatically gets reset to zero upon the Form getting the focus back. When I open standard windows apps like Microsoft Word and scroll down a document and then lose focus by switching to another application and then regain the focus on that Word document, the scrollbar thumb position is same as it was upon losing focus. Is this a bug/feature that I need to work around by saving off the thumb position in the Control.LostFocus event handler and restore in the Control.GotFocus event handler? Or is there some super simple way like a property setting - (the more I learn C#, the more I realize that some things are ridiculously simple if you know what property to use -- e.g. using Control.UseWaitCursor property of a container control instead of having to worry about setting the Cursor property to WaitCursor for each control contained by that container). <code> using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace autoScrollTest { public partial class Form1 : Form { public Form1() { Panel p = new Panel(); this.Controls.Add(p); p.AutoScroll = true; for (int i = 0; i < 1000; i++) { Button btn = new Button(); btn.Visible = true; btn.Text = "Button " + i; btn.Location = new Point(0,i * btn.Height); p.Controls.Add(btn); } } } } </code> Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90086
  - 16
    - Resources Hi, I am developing a Windows Form app, that has graphical buttons. Obviously I use the same button more than once throuout the application, but Visual Studio would appear to embed a set of images for each button into the program resources, instead of using a commen one. If I can make it use a common copy, I could reduce the size of my final exe file quite considerably. Is there a way I can edit this, and what is the best way to do it? Thanks. Paul Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90083
  - 17
    - Developing Windows App for different screen resolutions Hi, Our project requirement is to develop app for 2 different screen resolutions 1024x768 and .. 800x600.so basically I want my forms loaded with controls behave expectedly when screen resolution changes..how can this be done? thanks Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90080
  - 18
    - Drag/Drop an Image from a Web Browset I've implemented a drag & drop operation which allows an image (or a file containing an image) to be dropped onto a custom control. This works fine on dragging an image file already on my hard drive, but on dragging an Image from any web page in a web browser, I'm getting an "Out of memory" exception thrown, but there appears to be plenty of memory left. Why could this be happening ? NB. On dragging a web image, files[0] contains a reference to the image in my web cache (in short directory format), for example: "C:\\DOCUME~1\\JEREMYB\\LOCALS~1\\TEMP\\DisplayBannerImage.gif" Could this be why ? If so how CAN I implement dragging an image from a web browser ? Here's the relevant sections of code: public Form1() { InitializeComponent(); AlbumControl ac = new AlbumControl(p, atype, AutoLookup, cwidth /*, false*/); ac.AllowDrop = true; ac.DragDrop += new DragEventHandler(ac_DragDrop); ac.DragEnter += new DragEventHandler(ac_DragEnter); } private void ac_DragDrop(object sender, DragEventArgs e) { Image droppedImage = null; // Handle FileDrop data. if (e.Data.GetDataPresent(DataFormats.FileDrop)) { // Assign the file names to a string array, in // case the user has selected multiple files. string[] files = (string[])e.Data.GetData(DataFormats.FileDrop); try { // Assign the first image to the picture variable. droppedImage = Image.FromFile(files[0]); } catch (Exception ex) { MessageBox.Show(ex.Message); return; } } AlbumControl ac = (AlbumControl)sender; if (droppedImage != null) { // DO SOMETHING WITH IMAGE !! ac.MainImage = droppedImage; } // Force the control to be redrawn with the image. ac.Invalidate(); } private void ac_DragEnter(object sender, DragEventArgs e) { // If the data is a file or a bitmap, display the copy cursor. if (e.Data.GetDataPresent(DataFormats.FileDrop)) { e.Effect = DragDropEffects.Copy; } else { e.Effect = DragDropEffects.None; } } Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90079
  - 19
    - visual demo idea to shut up a mac developer?.... I'm porting a Mac application to window. Regularly I have comment like that: - (me): hum.. there is no shadow object in .NET's Graphic's object. - (him): what? but that's standart (mac) stuff!!! or - (me): well, the default RichTextBox doesn't handle kerning (character spacing). - (him): what? but that standart feature of Text editor! and that goes on...... that kind of irk me as well. I'm thinking.. well and what about code security? nice introspection, reflection & documented serialization? display control in a web page? strongly typed code collection? exception? remoting? (DO is crap) memory corruption free code? developer productivity? But he might not even realized what I'm speaking of.... (and the last one he said: ha, like java!) Grrmmrrbll.... I wonder, does any one has any idea of a simple visual demo .NET to shut this Mac gnagnagna? well, we browse through all the controls to look for an idea.. Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90078
  - 20
    - render an Rtf string I have a text editor which returns me an Rtf string and I want to draw on my control. My control il a bit like a drawing program, with various shape. I can't put a RichTextBox on (or many for that matter) So, is there anyway, tutorial to render Rtf? Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90077
  - 21
    - Multiple Main Menus using VB.NET Code on WinForm Can someone post the vb.net code which creates dynamic multiple main menus on WinForm. In MSDN help, it gives codes which just creats only one Main Menu from the Code. I am looking for code to have Multiple Main Menus like given below. File Edit View Exit mnuFileItem1 mnuEditItem1 mnuViewItem1 mnuFileItem2 mnuEditItem2 mnuViewItem1 Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90076
  - 22
    - Listview, reselect previous item, Delegates, Invokes Win32, Postmessage etc. I've got a listview on a form in report style. It's populated with 40 items. I want to prevent the user clicking on some items, and if the user clicks on one of these items I want the selection to revert back to the old selection, hideselection property if false, listview is single select. In the OnSelectedChange() handler I test to see if the newly selected item is a selectable one, if it's not, I try to change the selection like so. private void OnSelectedItemChanged(object sender, System.EventArgs e) { if( listView1.SelectedItems.Count != 0 ) { int idx = listView1.SelectedItems[0].Index; bool ret = execScript.isExecutable(idx); if(ret == false) { listView1.Items[execScript.getCurrentExecNum()].Selected = true; listView1.Select(); listView1.EnsureVisible(execScript.getCurrentExecNum()); listView1.Focus(); } } This doesn't work. Neither does posting a user message to this function by overriding the WndProc and calling Win32 [DllImport("user32.Dll")] public static extern Int32 PostMessage(IntPtr Handle, Int32 ConnectionType, IntPtr wParam, IntPtr lParam); ResetSelection() { listView1.Items[execScript.getCurrentExecNum()].Selected = true; listView1.Select(); listView1.EnsureVisible(execScript.getCurrentExecNum()); listView1.Focus(); } Neither does using a delegate like this listView1.BeginInvoke(new OnSelectedItemChangedDelegate(ResetSelection),null); Neither does adding a filter on to the listview control and trapping the LVN_ITEMCHANGING or LVN_ITEMCHANGED message in the WM_NOTIFY. Interesting to note though if I add a button to the form and call my ResetSelection() function it works fine. Three days I've spent on this. Can anyone help? Thanks Youngie... Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90073
  - 23
    - Accessing merge fields Word doc via VB.Net Given the following merge fields defined on a word document how can I acccess them via a Word document object in VB.NET? The data I want to subsititute is in a dataset. {MERGEFIELD "FirstName"} for example I would place row.FirstName in this field {MERGEFIELD "Picture1"} Here I want to place a picture loaded from a path for example contained in row.PhotoPath Any help would be appreciated. WR Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90068
  - 24
    - Listbox event for add/remove item? I want to enable/disable buttons depending on whether items exist in a listbox. I thought fore sure there would be an event anytime an item was added/removed from a listbox...and I could register for it to change my button status. But...I can't seem to find these events? Am I missing something? Is there any event that I could use? Amil Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90065
  - 25
    - PropertyGrid and UITypeEditor Hi! So I've created a custom class and I'm working on creating editor support for it. I've created and bound a custom UITypeEditor to it and everything. Here's the thing though: At design time, the property editor shows the little ... button next to a property of my type. I can clikc the button and a dialog pops up which I created. This is good and works as I expected. Here's the problem - at run time, I have a property grid control and I have SelectedObject set to an instance of an object which has a member of my type. However, when I select the property at run time using a propertygrid control on my form, the property is greyed out as if it was readonly, and the ... box doesn't show up. What do I need to do to be able to edit my control at runtime? Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90063
- Next
  - 1
    - PowerPoint and .NET - looking for components - do you know any? Hi I'm looking for a .NET commercial component that would allow me to create/edit ppt files, especially to handle emedded graphs - so far without a result. Do you whether such a component exists? TIA Simon Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90059
  - 2
    - How to force a datagrid to redraw? Hi, I've a datagrid bound to a dataview, the problem is when I cancel the row delete, one of the rows in the datagrid disppears. If there is only one row in the grid that row disappears. If there are three rows and I cancel the deletion of the first row then the last row will disappear. The funniest part is the row will reappear if I click on the column header to sort it. I read another post in this forum which mentioned forcing the grid to redraw after cancelling the delete will solve the problem, but I can't find a way to force the redraw. I've tried grid.refresh, currencymanager.refresh, even cleared the databinding and rebound the grid, nothing happens. Can someone help me please. Thanks in advance, Debi ******************************************* Private Sub OnGrid_RowDeleting(ByVal sender As Object, ByVal e As DataRowChangeEventArgs) Try If Not Deleterow(sender, e) Then bUnDelete = True End If Catch ex As Exception WriteToErrorLog(ex.Message & "----" & ex.StackTrace) Finally End Try End Sub Private Sub OnGrid_RowDeleted(ByVal sender As Object, ByVal e As DataRowChangeEventArgs) Try If bUnDelete Then e.Row.RejectChanges() '''''''''''''''''''''''Redraw here???????????? End If Catch ex As Exception WriteToErrorLog( ex.Message & "----" & ex.StackTrace) Finally End Try End Sub Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90058
  - 3
    - restricting maximising child form in MDI app Hi, iam facing a small probelm ... iam creating an MDI application in .net ver 2 and IDE is vb.net 2005 express. whenever i creates a form i sets the formborderstyle as "fixedtoolwindow" so that only close button will be there. No maximise and minimise buttons. but at the runtime if i double click on the titlebar of the childwindow it maximising itself to fill itself in the MDI app. i want to avoid this situation. can canybody help me how to do stop this ??... thanks in advance -- Deepson Thomas Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90057
  - 4
    - setting datagrid column width according to data without looping Hi all, can anybody tell me any way to set the column width of all columns of a datagrid according the data. one thing i can do is check the whole data in acolumn and find the longest text and set the column width as the length of text. but if the number of rows and colums is more this solution not sounds good. basically i want to know any way to do this task without any loops ...iam using vb.net 2 in VS 2005 express beta 2. winforms. thanks in advance -- Deepson Thomas Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90055
  - 5
    - Datagrid column Resizing event Hi all, iam currently working on winforms and iam using a a datagrid. in that when i click on the border of a column it adjusts itz width itself according to the data of that column. What i want to know is what even is fireing when i double click on the column border thanks in advance -- Deepson Thomas Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90053
  - 6
    - Keeping track of checked nodes in treeview Hi I have a treeview where I want to perform some actions on only the checked nodes. I don't really want to have to traverse the entire tree every time, since it's a pretty big tree, so what I was trying to do was keep a list of all the checked nodes - I handle the aftercheck event so that every time a node is checked I add it to my list, and when it's unchecked I remove it from my list. This can become clumsy, though - for example, if I want to programmatically uncheck some nodes, I can't just iterate through my list and uncheck them, since that will modify the collection that I'm enumerating through. Is there a better approach that I'm missing? Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90051
  - 7
    - Graphing tool Hello there Can any one please direct me to a site where i can purchase a graphing tool. The tool should have features engineering graphs, probability, youzooming and dynamic views. Thank you Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90046
  - 8
    - How to lock CheckState in CheckedListBox? I have a CheckedListBox where some of the items are checked and some are not. I want the CheckState to be Read Only. Unfortunately, the Locked property doesn't seem to prevent the user from changing the CheckState. The CheckedListBox is on a Tab Control if that makes any difference. Any help is greatly appreciated. carl Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90038
  - 9
    - Which form event to use? I want to show or hide controls on the form based on the value of an exiting public boolean value. Me.btnAddRow.Visible = bDataEntry Which form event does this belong in? putting it in the Form_Load event does not work. Should it be put in just after the initialize component? (I have verified that the boolean has the value.) Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90037
  - 10
    - gdi+ book? Hi, there doesn't appear to be to many books on the topic. A couple of books had bad reviews on amazon. Im not wanting to get into really advanced gdi+ programming. I probably just use it to create controls. Nothing really advanced. Does Chris Sells book on Windows Forms go into enough detail with GDI+ Or do you need another book? If so which book would you recommend? Is " .NET Graphics and Printing: A Comprehensive Tutorial and Reference for Developers " any good? thanks, Brent Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90032
  - 11
    - Console window appear when starting a win forms inside IE We have a winforms application that is started from IE. When we start the application with the URL (like www.myapp.com/OurApp.exe), a console window appear before the first form of our application. The console window stay until the application is close. Why this window is here ? The project property of the exe is -Output type --> Windows Application -Startup Object --> CoucheClient.ApplicationEit (this is a class within the assembly. She as a Sub Main function. -Root namespace --> Mtq.Eit. Thanks for your help ! Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90028
  - 12
    - owner drawn ListBox repaint issues I am using variable height owner-drawn ListBox using new Visual Studio 2005 Beta. It appears to not repaint items in ListBox until I actually select them. In the constructor of my ListBox I call the following code: <code> this.DrawMode = DrawMode.OwnerDrawVariable; this.DrawItem += new DrawItemEventHandler(HandleDrawItem); this.MeasureItem += new MeasureItemEventHandler(HandleMeasureItem); this.HorizontalScrollbar = true; this.MouseDown += new MouseEventHandler(HandleMouseDown); this.MouseUp += new MouseEventHandler(HandleMouseUp); this.SetStyle(ControlStyles.ResizeRedraw | ControlStyles.OptimizedDoubleBuffer | ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true); this.UpdateStyles(); </code> Then in the DrawItem and MeasureItem code I do the following: <code> public void HandleDrawItem(Object sender,DrawItemEventArgs e) { if (e.Index < 0) return; e.DrawBackground(); //Draw control onto bitmap Control ctrl = (Control)this.Items[e.Index]; //using (Image tmpImg = new Bitmap(ctrl.Bounds.Width, ctrl.Bounds.Height)) //{ // using (Graphics g = Graphics.FromImage(tmpImg)) // { // Utils.ControlPainter.PaintControl(g, ctrl); // } // ////map ctrl location to viewport coordinates // //Point loc = ctrl.Location; // ////top left of viewport corresponds to // ////location of topCtrl // //Control topCtrl = (Control)this.Items[this.TopIndex]; // //loc.Offset(-topCtrl.Location.X, -topCtrl.Location.Y); // //g.TranslateTransform(loc.X, loc.Y); // e.Graphics.DrawImage(tmpImg, e.Bounds); //} e.Graphics.DrawString("item: " + e.Index, this.Font, Brushes.Blue, e.Bounds); e.DrawFocusRectangle(); } public void HandleMeasureItem(Object sender,MeasureItemEventArgs e) { if (e.Index >= this.Items.Count) { return; } Control ctrl = (Control)this.Items[e.Index]; ctrl.Location = nextLocation; e.ItemHeight = ctrl.Height; nextLocation.Y += e.ItemHeight; e.ItemWidth = ctrl.Width; HorizontalExtent = Math.Max(e.ItemWidth, HorizontalExtent); } </code> However, the painting doesn't appear to be done until I actually select the item. Do I need to invalidate the whole listbox initially and then every time I scroll? Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90027
  - 13
    - *insert curse here* Hi I have a simple app where the user is prompted with a password dialog. When the password is being entered, the cursor is hidden as I assume is default XP behavior. The problem is when the user closes the dialog pressing the enter key (without any mouse movements done) the cursor will only reappear again when a mouse button has been clicked, not only by mouse movements. I have tried putting a Application.DoEvents() after the dialog closes but that only solves the problem when the cursor is located above the parent form. If the cursor is outside, it still won't reappear when moved back over the form. Any known reason for this? /Andreas Zita Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90024
  - 14
    - MAPISendMail Hangs Hello Group! MAPISendMail hangs forever. It only works if in the VS.NET debugger I hit a breakpoint anywhere *after* MAPILogon and *before* MAPISendMail. Without breakpoint the app hangs forever on MAPISendMail. Funny thing is, if the app starts a minimised Notepad just before MAPISendMail, it (MAPI) will continue after which the app kills the Notepad proces. This is a very ugly trick. This problem occurs in a large MDI app but not in a small test Windows.Forms app! (If the MAPI calls are put on a separate thread then MAPILogin fails). What could be the reason and fix? Thanx in advance for any pointers, Marius. ----------------------- Some code snippets: ' hwnd = IntPtr.Zero or MDI.Handle: No difference ' flags = MAPI_LOGON_UI+MAPI_NEW_SESSION: No difference ' no problem dim result as Integer = MAPILogon(hwnd, Nothing, Nothing, MAPI_LOGON_UI, 0, session) Dim msg as MapiMessage msg.Subject = subject msg.NoteText = body msg.MessageType = "" msg.RecipCount = 1 Dim recip As MapiRecip recip.RecipClass = MAPI_TO recip.Name = toEmail size = Marshal.SizeOf(recip.GetType) ptr = Marshal.AllocHGlobal(size) Marshal.StructureToPtr(recip, ptr, False) msg.Recips = ptr ' *BLOCK* if no 'pause' msg = MAPISendMail(session, hwnd , msg, MAPI_LOGON_UI, 0) ' log off --- <DllImport("mapi32.dll")> _ Public Shared Function MAPILogon(ByVal hwnd As IntPtr, _ ByVal username As String, _ ByVal password As String, _ ByVal flags As Integer, _ ByVal reserved As Integer, _ ByRef session As IntPtr) As Integer End Function <DllImport("mapi32.dll")> _ Public Shared Function MAPILogoff(ByVal session As IntPtr, _ ByVal hwnd As IntPtr, _ ByVal flags As Integer, _ ByVal reserved As Integer) As Integer End Function <DllImport("mapi32.dll")> _ Public Shared Function MAPISendMail(ByVal session As IntPtr, _ ByVal hwnd As IntPtr, _ ByRef message As MapiMessage, _ ByVal flags As Integer, _ ByVal reserved As Integer) As Integer End Function <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _ Private Structure MapiMessage Public Reserved As Integer Public Subject As String Public NoteText As String Public MessageType As String Public DateReceived As String Public ConversationID As String Public Flags As Integer Public originator As IntPtr Public RecipCount As Integer Public Recips As IntPtr Public FileCount As Integer Public Files As IntPtr End Structure <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _ Private Structure MapiRecipient Public Reserved As Integer Public RecipClass As Integer Public Name As String Public Address As String Public EIDSize As Integer Public EntryID As IntPtr End Structure <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _ Private Structure MapiFile Public Reserved As Integer Public Flags As Integer Public Position As Integer Public PathName As String Public FileName As String Public FileType As IntPtr End Structure -------- Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90022
  - 15
    - Adobe Acrobat won't close I have the following code in VB.Net 2003 to open up a PDF document using Adobe Acrobat 5.0. It opens up and closes pdf document and Acrobat application fine at the first time but the second time Acrobat's File->Exit or clicking on X to close Acrobat won't close application. The document is able to close and I have to use Task Manager to close application. Any suggestions? Dim AcroApp As Acrobat.CAcroApp Dim PDDoc As Acrobat.CAcroPDDoc Dim avDoc As Acrobat.CAcroAVDoc AcroApp = CreateObject("AcroExch.App") PDDoc = CreateObject("AcroExch.PDDoc") If PDDoc.Open(MyPdfFile.pdf) Then 'PDDoc.Magnification(200) AcroApp.Show() AcroApp.Maximize(100) avDoc = PDDoc.OpenAVDoc("") Else MsgBox("Unable to open the PDF file", vbInformation) End If avDoc = Nothing PDDoc = Nothing AcroApp = Nothing Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90016
  - 16
    - Serializing changes made to control via custom designer to source Got a custom designer that changes the arrangement of subcontrols in a custom control. It works fine, but if I save the form/rebuild the solution, exit out, and re-open the form, the subcontrols are back to their original place. I know I have to change how the custom control is serialized back to the code, and I believe it has something to do with Type Converters, but all I can find is information on how to serialize properties. Since this is not a property, but the order subcontrols are added to the custom control, I don't know how to deal with this. How do I go about doing this? TIA. Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90014
  - 17
    - How can I remove the System Menu? I have a mdiparent form without any controls. It contains one midchild form. When the mdichild form maximizes, its System Menu appears (in upper left and right corners) and the system menu occupies part of the mdiparent form. Is there any way to remove the system menu and the part occupied? Thank you very much. Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90012
  - 18
    - Siziing UserControls via a custom ControlDesigner We need to know which edge of a UserControl is being stretched when in design mode. We've created our own CustomControlDesigner, derived from ControlDesigner for our UserControl. We can't find a way to determine which edge of the Designer/Control is being stretched when the control is being resized in design mode. We want to resize different fields within the UserControl, based on the edge being dragged. There does not appear to be a way to get a mouse-down event before the resize to see which edge the user is being dragged. Any Ideas? Thanks Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90011
  - 19
    - Can I Word document in a Windows Form in .NET? I have tried the Microsoft Web Browser Control (shdocvw.dll) but there are a few issues with this such as the missing toolbar buttons and so on. Has anyone created or know of a control that wraps Word but leaves all of it's power intact? Thanks. Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90005
  - 20
    - Another 'The variable is either undeclared or was never assigned' Hi all, I've created an user control with an 'Enum' property in a windows lkibrary (dll), like this public enum ComboBoxTypes { Null, Task, Content, Language, Format, SectorType } private ComboBoxTypes comboBoxType = ComboBoxTypes.Null; // default public ComboBoxTypes ComboBoxType { get { return comboBoxType; } set { comboBoxType = value; } } So I've created new WinApplication and I've try to add my control to mainform, and by design set ComboBoxType property Now everytime I try to open mainform in design mode message "The variable 'ComboBoxTypes' is either undeclared or was never assigned." appears and inside InitializeComponent() function mycontrol.ComboBoxType resets to ComboBoxTypes.Null Why??? Thanks al lot Edo Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90002
  - 21
    - Reference to "My Pictures" folder From within a C# windows application, how can I get a reference (full path) to the current user's "My Pictures" or "My Documents" folder ? Please include any namespace references I'll need. Thanks. Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90001
  - 22
    - StackOverflowException when creating a new object Hi all. I am creating an apliction dll for my project. the call lib use a custom class, when i try to create a new object of the class it wiill generate a StackOverflowException. i am not using any Recurse function in the class. the exception occures even befor exicuting the objects constructor. please help me Tag: Q: How to highlit cell with changed value in DataGrid Tag: 90000
  - 23
    - LongHorn Style Windows Form Hi Guys, After seeing a longhorn screen shot, I got excited by its windows style. The form of it is half transparent, and the client area is opaque. Did anyone successfully implement this style of form? I tried many ways, but can find the road to it. Kit Tag: Q: How to highlit cell with changed value in DataGrid Tag: 89999
  - 24
    - .NET - MDI - Container - (Internet Explorer) ActiveX loses parent Hi everyone, We are currently developing an application in C# which has MDI forms. Each MDI form has a detach-button which removes the form from its parent and displays it as a regular form. In .NET, you can use the System.Windows.Forms.Form.MdiParent property. Everything seems to work when regular .NET controls are part of the MDI form. However, if there's an ActiveX control on the form, it loses its parent and gets drawn somewhere on the screen, floating, not part of the MDI parent and not part of the MDI form. This is the case with for example the Internet Explorer ActiveX (shdocvw), the Remote Desktop ActiveX (msrdp) and probably a lot of others. We did not have that problem with a third-party component, which seems to remember its direct parent. I guess we forgot something in the approach on how to handle the microsoft ActiveXs. Has anybody a clue for this problem? We already checked every property of the AxHost and Form (container, toplevelcontrol, toplevel, parent, ...) but they're all updated correctly after the detach. We also tried to toy with the SetChildIndex function... Here are the important snippets of a sample application, full source upon request. Project consists of 2 forms, MainForm (the MDI parent) and ChildForm (the MDI child). --- MainForm Load event : Start --- this.IsMdiContainer = true; ChildForm child = new ChildForm(); child.MdiParent = this; child.ShowInTaskbar = false; child.Show(); child.ChangeUrl(); --- MainForm Load event : Stop --- ChildForm has one button (DetachButton) and an Internet Explorer ActiveX (Microsoft Web Browser from the Microsoft Internet Controls) --- ChildForm : DetachButton event : Start --- private void DetachButton_Click(object sender, System.EventArgs e) { this.MdiParent = null; this.ShowInTaskbar = true; ChangeUrl(); } --- ChildForm : DetachButton event : Stop --- --- ChildForm : Public method : Start --- public void ChangeUrl() { axWebBrowser1.Navigate("http://www.microsoft.com"); } --- ChildForm : Public method : Stop --- Run the application and the MDI form will show the microsoft-website. Click detach and the form will be detached from its parent. The ActiveX starts floating and is not part of the ChildForm anymore. Thanks for your time! Wim Verbeke Tag: Q: How to highlit cell with changed value in DataGrid Tag: 89996
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    - Howto :: Multiline DataGridView :: More precisely a Multiline DataGridViewTextBoxColumn Hi, I found less in the docs about a Multiline DataGridView. More precisely a Multiline DataGridViewTextBoxColumn --------------- I found the following infos: multiline datagridview cells? ... http://forums.microsoft.com/msdn/ShowPost.aspx?PostID=4334 DataGridViewCellStyle.WrapMode Property ... http://whidbey.msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/P_System_Windows_Forms_DataGridViewCellStyle_WrapMode.asp Sizing Options in the Windows Forms DataGridView Control ... http://msdn2.microsoft.com/library/74b2wakt(en-us,vs.80).aspx --------------- This example works for me, but does anyone have any suggestion for improvement? dgv.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells; DataGridViewCellStyle cellStyle = new DataGridViewCellStyle(); cellStyle.WrapMode = DataGridViewTriState.True; dgv.Columns["LongText"].DefaultCellStyle = cellStyle; Greetings Gordian Tag: Q: How to highlit cell with changed value in DataGrid Tag: 89994

Hi All!

My app uses databound datagrid control (binds to DataSet containing several
DataTables and DataRelations). The data in DataSet are being updated what
changes some cell values in DataTables (changes are made only to cells with
new values). My problem is that I look for an efficient method to highlit
changes in DataGrid control (preferable by changing BackColor and ForeColor
properties of given cell) to alert user to new vaules.

My attempt to catch TaxetChanged event in DataGridTextBox failed flat -
changes in DataSource do not trigger that event. Monitoring of DataSet and
DataTables obviously is possible, howoever, I would find it to be more
elegant to constraint all the highliting code to DataGrid control.

Any ides?

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