Generic GDI+ Error in Datagrid

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  - 1
    - IP address handling Hi there, Is there a control that I can use in C# which will help me work with IP addresses conveniently? And how can I add and subbtract IP addresses? Tag: Generic GDI+ Error in Datagrid Tag: 66467
  - 2
    - Label not showing up on gui form called from within load handler of other form Hi: I'm trying to setup a simple message box that displays a message (like "Exiting Applicaton....). It's a simple form with only one label on it, displayed in the center. The label's text is set after initializecomponents is called from the form's constructor. I'm trying to use this in other forms. Right now, in the load handler for another form, I have a warning message. If the user chooses no, I'd like to have the display message show on the screen for a couple of seconds before exiting app. I create an instance of the message form from within the other form's load handler and call Show(). The form displays on the screen, but where the label should be, is only a white rectangular area, with no text at all. Is there some extra precautions needed when calling other forms from within your form application? Any advice and/or help is appreciated. Thanks Tag: Generic GDI+ Error in Datagrid Tag: 66460
  - 3
    - An unhandled exception of type 'System.NullReferenceException' I'm getting the following error trying to run a program written in C# (or in VB) from Visual Studion.NET 2003. I'm just pressing the F5 (start) key to run the application. It's happening with both languages. "An unhandled exception of type 'System.NullReferenceException' occurred in system.windows.forms.dll Additional information: Object reference not set to an instance of an object. Thank you very much in advance. Tag: Generic GDI+ Error in Datagrid Tag: 66457
  - 4
    - Security violation when trying to bring up help Hi, Thanks to the MVPs for all the help the last few days. You guys really saved me. The problem I am currently having is that I am doing the following (C#): Help.ShowHelp(this, "help.htm"); This brings up an HTML page that contains the very simple help information for the application. This help file gets installed in the same directory as the application. It works well on my development machine, but when I run it on a test machine (Windows98 with the .NET 1.1 framework) I get a security exception. It appears that the default security settings for the 1.1 framework do not allow this. So how can I bring up a single HTML help page without requiring my user to change the security permissions (not practical)? The error information is included below. Thanks! -Vance Gloster See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.Security.SecurityException: Request for the permission of type System.Security.Permissions.SecurityPermission, mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed. at System.Security.CodeAccessSecurityEngine.CheckHelper(PermissionSet grantedSet, PermissionSet deniedSet, CodeAccessPermission demand, PermissionToken permToken) at System.Security.CodeAccessSecurityEngine.Check(PermissionToken permToken, CodeAccessPermission demand, StackCrawlMark& stackMark, Int32 checkFrames, Int32 unrestrictedOverride) at System.Security.CodeAccessSecurityEngine.Check(CodeAccessPermission cap, StackCrawlMark& stackMark) at System.Security.CodeAccessPermission.Demand() at System.Windows.Forms.Help.ShowHTMLFile(Control parent, String url, HelpNavigator command, Object param) at System.Windows.Forms.Help.ShowHelp(Control parent, String url, HelpNavigator command, Object param) at System.Windows.Forms.Help.ShowHelp(Control parent, String url) at NC_Desktop.MainWindow.buttonHelp_Click(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.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ************** Loaded Assemblies ************** mscorlib Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/microsoft.net/framework/v1.1.4322/mscorlib.dll ---------------------------------------- System Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/assembly/gac/system/1.0.5000.0__b77a5c561934e089/system.dll ---------------------------------------- System.Drawing Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/assembly/gac/system.drawing/1.0.5000.0__b03f5f7f11d50a3a/system.drawing.dll ---------------------------------------- XXXXXXXX Assembly Version: 5.0.1501.31677 Win32 Version: 5.0.1501.31677 CodeBase: file:///G:/INSTALL%20NC%20DESKTOP/TRY/XXXXXXXX.EXE ---------------------------------------- System.Windows.Forms Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/windows/assembly/gac/system.windows.forms/1.0.5000.0__b77a5c561934e089/system.windows.forms.dll ---------------------------------------- ************** JIT Debugging ************** To enable just in time (JIT) debugging, the config file for this application or machine (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled. For example: <configuration> <system.windows.forms jitDebugging="true" /> </configuration> When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the machine rather than being handled by this dialog. Tag: Generic GDI+ Error in Datagrid Tag: 66452
  - 5
    - disabled textbox I have a texbox which can be in one of three states in my application. 1. enabled, 2. disabled, 3. read only, with a different color background. When switching between these states, going from #3 to #1, I set the backcolor in my program to System.Drawing.SystemColors.Window which seems to be the default back color for windows forms controls. However, once I set the backcolor manually, when I disable the textbox its background doesn't change to gray the way it normally does. It just stays with the backcolor I assigned to it, which is white. Is there a way of assigning the default back color to a control, or undoing the backcolor assignment? Thanks for any help. Elif Tag: Generic GDI+ Error in Datagrid Tag: 66448
  - 6
    - IIS ports Hi all, Does anybody have any experience of running .Net windows forms controls from a html page on any other IIS port than 80 ? If so can anyone tell me why i cant get even the simplest control to display correctly. When IIS is on port 80 then everything is fine. rgds Dave. Tag: Generic GDI+ Error in Datagrid Tag: 66447
  - 7
    - Defining the start position for a dialog box Hi I am looking for a way to define the starting position for a common dialog box in C#, specifically for an instance of the class FolderBrowserDialog. I can't find a way to do this with managed code and I haven't had any luck with an unmanaged code solution either. I would appreciate help in implementing either one of these methods Thanks for your help Jeannie Tag: Generic GDI+ Error in Datagrid Tag: 66445
  - 8
    - Problems drawing to a 1bpp (indexed) image. I've been tasked with writing a control for displaying previews from scan software we use. These are scans of plan drawings and are roughly 11000x8000, 1bpp CCITT compressed TIF graphics. I can used Image/Bitmap.FromFile to load them correctly, for display purposes I am creating a scaled render of the original image (so that paints don't have to perform scaling/sampling on every draw) which gets costly enough that we don't want to do it Problem; I modified the code this morning to use the PixelFormat of the source image in creating this scaled image, now I need to draw the original image to this new image. But Graphics.FromImage() throws an Exception for our TIF images because the target image is an indexed image, and .NET doesn't seem to support this I found one other post on the newsgroups related to this problem, and Microsoft's solution was to draw to a 24 or 32bpp image and then (for the original author's purposes) save to an indexed format (presumably GIF being that the post dealt with an 8bpp graphic) That would work great (or well enough) for the original author's problem, but let's do some math 11000*8000=88,000,000 elements/pixel Not knowing how the Image class was implemented for holding 1bpp graphics, I assume this requires 11,000,000 Bytes, ~10742.2 KB or ~10.4 M This we could easily accomodate (memory requirements would be low for this image) According to the post I originally found, the only obvious solution is to create a target graphic that is NOT indexed. Going back to the math this would require 88,000,000*4 Bytes = 352,000,000 B, ~343750 KB or ~ 335.7 M Obviously we can't do this. It's almost obvious we need a graphics object that can work with an indexed image My opening pointed out I am drawing to a scaled surface, so my target isn't really 335MB, it's around 30MB (roughly 8% of the physical 'pixel' size of the document). I must display these, but even this allocation is unsatisfactory, especially since my control will allow zooming in to the original document size of 100%, making the scaled image the same size as the source image Does anyone have any suggestions? Maybe there is a way to scale the image without creating the new image object and drawing it myself? On the same note, can Microsoft drop the $ into the developer time it would take to make a graphics object that could work with indexed/paletted surfaces? This seems like something a fair percentage of developers might need, and if available, would obviously use, so why wouldn't it be done already (except to save time, or meet some design goal/model I may not be aware of) Thanks in advance for any possible solutions, I'll poke around and look for some solutions and post what I find, we were really hoping to nix the sampling/scaling on every draw (panning code) since it was causing notable lag in the application (being that the original document has a massive resolution on it, even a 2ghz machine with 1gb of RAM takes effort) - Shau Tag: Generic GDI+ Error in Datagrid Tag: 66443
  - 9
    - Strange Behavior with .showdialog() Greetings, Take the following example of a form and a form launched from within it. Dim frmCredit as new frmCredit frmCredit.showdialog() Now, in the frmCredit, you have an OK box which does the saving of data, cleanup, validation, etc.... On one of the validation checks (ensuring that all required fields are entered) you have the following: Private Sub cmdOK_click(ByVal sender as System.Object, ByVal e as System.EventArgs) Handles cmdOK.Click errorProvider(txtName,"") if txtName.text.length=0 then errorprovider.seterror(txtName, "Enter Name") exit sub end if ......... End Sub Problem: When this validation fails, when the exit sub is called, it closes the entire form, rather than exiting just the cmdOK_Click event. This then puts you back at the original form which would create, what I'd term as an unpleasant user experience. However, should you change the original call to: "frmCredit.Show()" when the data validation fails and the exit sub is called, it returns to the frmCredit as expected. What gives? Anybody work around this with the showdialog? I'd like to use this call, as it is imperative and the underlying form relies on the data that is input on the frmCredit. Michael Tag: Generic GDI+ Error in Datagrid Tag: 66433
  - 10
    - Changing a Messagebox font Is there a way to change the messagebox font in a VB.NET/ C# Windows Application? I have been trying it using the API SystemParametersInfo without much luck. Any help would be greatly appreciated. Thank you Sam Tag: Generic GDI+ Error in Datagrid Tag: 66432
  - 11
    - Exception on Form restore I am experiencing an odd issue when my form is minimized. Upon activation, my form refreshes some data within a DataGrid control. No exception is thrown until the form is minimized, then restored from the task bar. Upon restore, an exception is thrown in the Activated event. The exception is as follows: System.ArgumentException: '0' is not a valid value for 'value'. 'value' should be between 'minimum' and 'maximum'. at System.Windows.Forms.ScrollBar.set_Value(Int32 value) at System.Windows.Forms.DataGrid.SetDataGridTable(DataGridTableStyle newTable, Boolean forceColumnCreation) at System.Windows.Forms.DataGrid.TableStylesCollectionChanged(Object sender, CollectionChangeEventArgs ccea) at System.Windows.Forms.GridTableStylesCollection.OnCollectionChanged(Collectio nChangeEventArgs ccevent) at System.Windows.Forms.GridTableStylesCollection.Clear() at MyProject.frmMyForm.FormatGrid() at MyProject.frmMyForm.MyForm_Activated() The exception occurs on a line of code that simply clears all TableStyles from the DataGrid object (frmMyForm.MyDataGrid.TableStyles.Clear). Any ideas as to why this only occurs when the form is restored from being minimized? -- Scott Adams ~~ not the Dilbert guy ~~ ~~ not the creator of the Adventure series ~~ Tag: Generic GDI+ Error in Datagrid Tag: 66431
  - 12
    - VS.NET 2003 Windows Toolbar: How to center text without image? I am trying to create a toolbar in a Winforms application that contains only the Text on the button without an image. It appears there is no way to tell the button to draw itself without an image and center the text. For example, all I want is a button with the letter 'R' on it in the center of a small button on the toolbar; however, the 'R' is in the lower half of the button and the button looks to be anticipating the addition of an image in the upper half. How can I implement a toolbar with only small buttons and the text in the center WITHOUT an image? Thanks Mark Tag: Generic GDI+ Error in Datagrid Tag: 66421
  - 13
    - Simulate Form's ShowDialog with other control (threading?) I want to extend a ListBox by adding a ShowDialog method that will wait (block) the main thread until the user has selected an item in the ListBox (i.e. similar to Form.ShowDialog). I'm not clear about what threads are running behind the scenes in C# (GUI, etc.). How can I block the main thread while allowing the GUI thread and also (if needed) a separate thread to handle the ListBox events. Once the user has selected an item or has selected outside the ListBox, I would unblock the main thread and return the result I already have this working by putting a ListBox inside of a Form, but the dialog (of ShowDialog) takes focus away from the main application when shown (application title is out of focus since dialog has focus). If I can duplicate the blocking mechanism of the ShowDialog method, I will be able to keep all focus within the application. Note: I use Capture to handle mouse clicks outside of the ListBox. Tag: Generic GDI+ Error in Datagrid Tag: 66415
  - 14
    - Changing backcolor of a checkbox How can I change the back color of a checkbox, not its label, but the actual checkbox? Thanks, Elif Tag: Generic GDI+ Error in Datagrid Tag: 66413
  - 15
    - Controls Subclassing in .NET Does anyone has such expirience?Share it please: thanks Tag: Generic GDI+ Error in Datagrid Tag: 66409
  - 16
    - Counting Connected Event Handlers I have a customer control that inherits from System.Windows.Forms.Control. Its not the worlds most complicated control but I have a problem. I'm trying to get a count of the number of events connected to base.click. Is this possible Thank Al Tag: Generic GDI+ Error in Datagrid Tag: 66408
  - 17
    - MDI App Timeout I have an MDI app that I need to timeout after a certain amount of time, say 30 minutes. I am looking for a way to make sure that if the user selects a childform or types something in the childform or selects a menu item or even just clicks on something in the app it will not timeout. But if the user minimizes the app and does nothing with it for the preset time or just walks away from their PC for that longer than the preset time that the app will give them a warning that the application is closing. So far I have looked at trying to do mouse clicks and keyboard presses but I can't seem to figure out how to do it without having to write something in every childwindow. I have also looked at Application.Idle but it seems that if something else is going on on the machine like I am working with another application the Applicaiton never seems to go idle until all typeing and mouse clicks have stopped all together. Has anyone come up with a way to do something like this? The timer part is easy of course my biggest issue is how to catch all mouse clicks within the parent form as well as keystrokes but ignore everything outside the app. TIA -Stanley Tag: Generic GDI+ Error in Datagrid Tag: 66402
  - 18
    - C# windows app Keyboard hook SetWindowsHook Hi I have to prevent user pressing Alt, Ctrl, Shift and Windows+M key combinations when the windows form created by the application is active. The main thread runs in background and the entire application is like a Wizard where user keeps on pressing Ok / Cancel and the next form is opened after closing the previous one I have to prevent user from pressing all special keys, user should not be able to minimise the app etc How do I do that I tried SetWindowHookEx(...) but that did not work Also in WinUser.h has #define WH_KEYBOARD 2 an #define WH_KEYBOARD_LL 1 The Hook can be created using WH_KEYBOARD but not WH_KEYBOARD_LL The hook created using WH_KEYBOARD does not work. Can some one help me in providing a small snippent of code Thanks in advance Tag: Generic GDI+ Error in Datagrid Tag: 66400
  - 19
    - Localized form name Hello All I want a form name to be changed depending upon the cultureInfo. Whenever one creates a form, its corresponding Form1.resx file is created. I created a file named Form1.fr-FR.resx, and added the string resource for form name. The application compiles fine, but even if I change the Thread.CurrentThread.CulturInfo property to fr-FR, the string is not taken from the new file. Is anything I'm missing Thanx Mahesh. Tag: Generic GDI+ Error in Datagrid Tag: 66398
  - 20
    - Localized form name Hello All I want a form name to be changed depending upon the cultureInfo. Whenever one creates a form, its corresponding Form1.resx file is created. I created a file named Form1.fr-FR.resx, and added the string resource for form name. The application compiles fine, but even if I change the Thread.CurrentThread.CulturInfo property to fr-FR, the string is not taken from the new file. Is anything I'm missing Thanx Mahesh. Tag: Generic GDI+ Error in Datagrid Tag: 66397
  - 21
    - Inherit TextBoxBase How do I inherit from TextBoxBase? It does not have a public,protected or friend constructor and yet Microsoft appear to be able to use inherit in the TextBox and RichTextBox. The TextBox IL displayed in ILDASM shows a TextBoxBase::.ctor. Tag: Generic GDI+ Error in Datagrid Tag: 66396
  - 22
    - When does the AutoScrollPosition value change? Hello! I have a panel with AutoScroll enabled. After Scrolling I read out the X and Y values from AutoScrollPosition but they are still 0. How come? I need to find out the position of the scrollbars so that I can correct the X and Y values I use in the MouseUp event to show a popup menu at the correction position. Thank you for helping. /David. Tag: Generic GDI+ Error in Datagrid Tag: 66395
  - 23
    - default directory c:\winnt\system32? Hello, I have a very simple C# WindowsForms app accessing a file. Framework 1.0 SP2. The filename is used without any path reference. On 99% of machines I tested, the file is correctly located in the applications startup directory. On one machine however, it looks for the file in c:\winnt\system32. I can of course reference the path by using Application.StartupPath, but I would like to know what is causing this, since the one machine is a production server... Any clues? Hans Tag: Generic GDI+ Error in Datagrid Tag: 66394
  - 24
    - UI testing Yo!: can anyone advice me about following topics (or to give me some links about them 1.How to test UI ? - i mean some unit tests for the applications U 2.Is there some tools for automated testing of applications UI 3.What kind of unit tests can be performed at all thanks in advance : Tag: Generic GDI+ Error in Datagrid Tag: 66393
  - 25
    - Datagrid.color Hi, Good Day! I've a 2 datagrid in my windows form. The 2nd datagrid will update the 1st datagrid. I'd like to set the color of the datagrid to light blue only if the records is updated during runtime. Can someone help? Thanks in advanced. rgds, Phoebe. Tag: Generic GDI+ Error in Datagrid Tag: 66385
- Next
  - 1
    - Anchor/dock property I have a forms application which has many controls such as buttons,labels,listviews,text boxes etc. If you set the window size to maximum size so that it would expand to the size of the screen the controls tend to move without any proposion. So then I used anchor and the dock property. I could get some or most of them to appear correctly, but say you have to list boxes in the middle of the screen one after the other vertically how could you use anchor or dock property. Tag: Generic GDI+ Error in Datagrid Tag: 66384
  - 2
    - Serializing/DeSerializing System.Windows.Forms.Cusrsor object looses the hotspot Hi All, We are trying to Serialize a System.Windows.Forms.Cursor object and Deserialize it. Before serializing the cursor behaves correctly but when we serialize and use a deserialized object, the hotspot (the cursor pointer) is not where it is expected to be. We tried both binary and soap formatters. TIA Sankar Nemani Tag: Generic GDI+ Error in Datagrid Tag: 66381
  - 3
    - Can I "Invoke" a Property? I know how to 'invoke' a method......but now... I have a control that has a property "Selected" I would like to change it from different thread... how can I invoke it? thx Tag: Generic GDI+ Error in Datagrid Tag: 66378
  - 4
    - Designtime turns to Runtime when copy-pasted... This is a really bad behavior of the design time, but I am not sure if it can be avoided in some way. Basically: I created a custom LicenseProvider that checks the context for the UsageMode (DesignTime or Runtime). Depending on that it uses a design time algorithm or a runtime one to get the license. However, if you select a control and then use copy + paste (either by keyboard or context menu) the pasted control has the context set to Runtime... This is really bad... Here's how to replicate: create a user control and a LicenseProvider. In the license provider's GetLicense method put a message box to display the context.UsageMode. Add the control to the toolbar, drag and drop it on the design surface. Then select it and press Ctrl+c and then Ctrl+v. You will see that the second control will show "Runtime"... Unfortunately I didn't find a way yet to go around this... Perhaps someone has an idea thanks iulia Tag: Generic GDI+ Error in Datagrid Tag: 66377
  - 5
    - Rich TextBox Text input I am trying to read text input from a rich text box control. For example if there are 10 rows of text in the text box and the user moves the cursor(or caret,by the way there is no mouse interaction)to a certain row and then say press Key "A" the text on that row should be extracted. Anybody know how to do this. Thanks in advance Tag: Generic GDI+ Error in Datagrid Tag: 66373
  - 6
    - custom design UI I am currently working on an application where we decided to have a customized look and feel (as opposed to the standard Windows UI). I took an approach using graphics to define windows borders and buttons, etc... but I'm not satisfied at all with the performance. Windows take a long time to display making this interface less than friendly. The graphics for the windows borders are placed on the form using PictureBox controls. Graphics are GIFs ranging from 1K to 5K with 90% of graphics between 1k and 2K. Am I taking the wrong approach? What would be a better way to go about this? Thanks a lot for your input Ben Tag: Generic GDI+ Error in Datagrid Tag: 66370
  - 7
    - How do I force an autotab to the next textbox I have textboxes with unambigous field-lengts, such as single character. When a valid value is entered into one of these, I would like to autotab to the next textbox. What is the best way to do this? Tag: Generic GDI+ Error in Datagrid Tag: 66369
  - 8
    - How do I set focus on a specified textbox at load? I am attempting to set the focus on a calculated textbox during the forms Load event, however it seems to want to go to the default location instead. Is there some way I can do this in a way that gurantees it will go where I want it to go when the form is made visible? Tag: Generic GDI+ Error in Datagrid Tag: 66368
  - 9
    - Possibly strange behavior with ToolTip. I have a .NET application that seems to have a really strange bug. The following code represents a form that adds a control (in this case, a label) to a form every few seconds. The code is similar to the application I'm working on. As my application receives data, it will add or remove user controls which represents the data on the fly When I create the control I set its tool tip. When the control is added to the form, the form takes focus on the screen. This is a really annoying feature as I don't want the user to work with another application and have my application pop up in the foreground every time my application receives new data. The really strange part is that this behavior goes away when I remove the code to set the control's tool tip. Does anyone have any ideas why this is happening using System using System.Drawing using System.Collections using System.ComponentModel using System.Windows.Forms using System.Data namespace WindowsApplication /// <summary /// Summary description for Form1 /// </summary public class Form1 : System.Windows.Forms.For private Timer timer private int yOffset = 0 private int i = 1 private System.Windows.Forms.ToolTip toolTip1 private System.ComponentModel.IContainer components /// <summary /// Constructo /// </summary public Form1( InitializeComponent() StartTimer() /// <summary /// Clean up any resources being used /// </summary protected override void Dispose( bool disposing if( disposing if (components != null) components.Dispose() base.Dispose( disposing ) #region Windows Form Designer generated cod /// <summary /// Required method for Designer support - do not modif /// the contents of this method with the code editor /// </summary private void InitializeComponent( this.components = new System.ComponentModel.Container() this.toolTip1 = new System.Windows.Forms.ToolTip(this.components) // // Form // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13) this.ClientSize = new System.Drawing.Size(292, 273) this.Name = "Form1" this.Text = "Form1" #endregio /// <summary /// Start the timer to dynamically add components /// </summary private void StartTimer( timer = new Timer() timer.Interval = 5000 timer.Tick += new EventHandler(OnTick) timer.Start() /// <summary /// Called each time the timer's interval has passed /// </summary /// <param name="sender"></param /// <param name="args"></param private void OnTick(object sender, EventArgs args SuspendLayout() Label label = new Label() label.Text = "Label" + i label.Size = new Size(200, 15) label.Location = new Point(0, yOffset) Controls.Add(label) toolTip1.SetToolTip(label, "Label" + i) ResumeLayout() yOffset += label.Height i++ /// <summary /// The main entry point for the application /// </summary [STAThread static void Main() Application.Run(new Form1()) } Tag: Generic GDI+ Error in Datagrid Tag: 66366
  - 10
    - TreeView display refresh. Hello I have a tree view control on a form with some nodes in it. When I add/remove/change nodes, the tree disappears and then repaints. I have used the BeginUpdate and EndUpdate methods, but this makes no difference. Is there any way I can stop the application from clearing the treeview from the screen before repainting it Cheers. Tag: Generic GDI+ Error in Datagrid Tag: 66365
  - 11
    - How can my application determine when the system is shutting down? I am currently developing a taskbar-icon based program which normally has no open windows. I understand that there is a Microsoft.Win32 event that is supposed to notify the application, but this event fails to fire when the computer is shut down. I have Windows XP. By not knowing when the computer is shutting down, my application stays in memeory when the computer tries to shut down, so all proccesess except the app close. To avoid this, you must manually close the program before shutting down the computer. I hope that I can find a way to make my program more user-friendly in this respect. I would apprectate any information on this subject. Tag: Generic GDI+ Error in Datagrid Tag: 66364
  - 12
    - Applicaiton Timeout I am looking for a way to see if the user has done anything within my app for about 30 ins. I figure I could probably add a hander for the mouse clicks and for the keystrokes but I am not sure this is the best idea. Is there a better way? Also how would I capture all keyboard and mouse clicks? -Stanley Tag: Generic GDI+ Error in Datagrid Tag: 66361
  - 13
    - SQL queries on Dataset in memory Is there an easy way to run SQL queries on a dataset that's in memory. I've loaded up data from an XML text file, and would like to run some update queries on the tables that are created in the dataset, and then write them back out as XML Anyone know if this is possible without writing the data back out to a database table in Access or some other db format Thanks, Tag: Generic GDI+ Error in Datagrid Tag: 66360
  - 14
    - Hide / alter columns Datagrid (Web Service & Dataset) I'v seen others asking how to do this. This is how I got it done ' call Web Service for Datase Dim DataSetName As DataSet = SearchDeal(par1, par2 'test that you have a dataset with value Dim strTest As String = DataSetName.GetXm If Not (strTest = "<NewDataSet />") The 'create tablestyl Dim tableStyle As New DataGridTableStyle( ' set to table dataset nam tableStyle.MappingName = "TabelName 'get element count from datase Dim numCols As Intege numCols = DataSetName.Tables("TableName").Columns.Coun Dim i As Integer = ' loop thru dataset to create column Do While (i < numCols Dim myDataCol As New DataGridTextBoxColumn( myDataCol.HeaderText = DataSetName.Tables("TableName").Columns(i).ColumnNam myDataCol.MappingName = DataSetName.Tables("TableName").Columns(i).ColumnNam tableStyle.GridColumnStyles.Add(myDataCol i = i + Loo 'set Header background color and font colo tableStyle.HeaderBackColor = System.Drawing.Color.MidnightBlu tableStyle.HeaderForeColor = System.Drawing.Color.WhiteSmok ' for colums you wish to hide, set width value to 0 or - tableStyle.GridColumnStyles(44).Width = "0 tableStyle.GridColumnStyles(45).Width = "0 DataGrid1.TableStyles.Clear( DataGrid1.TableStyles.Add(tableStyle 'bind dataset to Gri DataGrid1.DataSource = DataSetName.Tables("TableName" End If Tag: Generic GDI+ Error in Datagrid Tag: 66352
  - 15
    - Single Instance of App Per User I have been asked to make sure that a WinForm app can only have one instance and this would not be an issue if that was the only part. I could simply loop through the processes and see if the process name is already in the collection. However, the second part of the request was to make sure that if someone is running the app and someone else does the quick login or uses Terminal Services that they be able to run the app under their network ID. So I need to find a way to look at processes under a particular user or to compare the processes users. Anyone know how this could be done? TIA -Stanley Tag: Generic GDI+ Error in Datagrid Tag: 66348
  - 16
    - Changed dataset values mystery This, to me, screams 'Bug!!!!', but before I get into support calls to Microsoft type stuff, does anyone have any suggestions about how the following can happen.... VS 2003 using VB.Net. I have a Windows form that is used for displaying data from a dataview. The dataview sorts a dataset, and also filters it so that only records relating to the current user get shown. In the particular situation where I know I can recreate my problem, the dataview contains 4 records. There is a field called Nominee. For the record with the reference AG 11 (i.e. the key field), the nominee is NMS. So... DealDS1.Tables("Main").Rows.Find("AG 11").Item("Nominee")="NMS" I now want to import data into the dataset (...fields are set so that the data will also fall into the dataview as well....). I read the first line of data from a spreadsheet, add a new row onto DealDS1.Tables("Main"), set the values of the fields, and then add the datarow onto the dataset. Fine. No problem (normally). Again going back to the spreadsheet that I know makes it go wrong, this works up until the 6th row. Then this happens.... Read the 6th row of the spreadsheet. Add a new row onto the dataset.... newrow = DealDS1.Tables("Main").NewRow Set the values of the fields. newrow.Item("Blah")="Whatever" for various fields Stepping through this code I now look at the value of DealDS1.Tables("Main").Rows.Find("AG 11").Item("Nominee") and it's NMS Next line of code adds the row onto the dataset.... DealDS1.Tables("Main").Rows.Add(newrow) (the new row as a key value of AG 26) And after that line DealDS1.Tables("Main").Rows.Find("AG 11").Item("Nominee") is now NMA I have no code that I can see that is getting triggered by adding the new row. So that just can't possibly happen. Can it? Tag: Generic GDI+ Error in Datagrid Tag: 66346
  - 17
    - Cut, Copy, & Paste Menu Does anyone have a link where I can get code for the cut, copy, and paste menu of a MDI application? Or the basic features of most Edit menus? Thanks, Greg Tag: Generic GDI+ Error in Datagrid Tag: 66345
  - 18
    - How to determine single click vs. double click? I have a windows forms application that needs to do one thing for a single click and another thing for a double click event. However, the forms click event gets fired whenever a double click event occurs and I don't want to perform the single click event plus the double click whenever the user double clicks on the form. What is the best (standard) way to handle this? IMHO it seems like there should be three Click events for a form: Click - Gets fired on first mouse down mouse up MouseDown Click MouseUp SingleClick - Gets fired after click if no double click MouseDown Click MouseUp SingleClick DoubleClick - Gets fired after second mouse down mouse up MouseDown Click MouseUp MouseDown DoubleClick MouseUp Am I missing something? Thanks. Gregg Walker Tag: Generic GDI+ Error in Datagrid Tag: 66344
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    - Setting the length of datagrid columns I am binding a datatable to a datagrid in VB.NET I then want to change the width of the first column. I am unable to get the right syntax. Here is the code I tried Dim mydataset As DataSet gclodatabase.GetDataSetJobs("Select * from qryJobs", mydataset) Dim Mydatatable As DataTable = mydataset.Tables(0) dtgSelect.DataSource = mydataset.Tables(0) dtgSelect.TableStyles(0).GridColumnStyles("JobId").Width = 10 ? this fails with an error An unhandled exception of type 'System.NullReferenceException' occurred in Proposals.exe ?Additional information: Object reference not set to an instance of an ?object. dtgSelect.TableStyles(0).GridColumnStyles(1).Width = 10 ? this fails with error ?An unhandled exception of type 'System.ArgumentOutOfRangeException' ?occurred in mscorlib.dll ?Additional information: Index was out of range. Must be non-negative ?and less than the size of the collection. dtgSelect.Refresh() Tag: Generic GDI+ Error in Datagrid Tag: 66342
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    - How to add new line to TextBox How do i add a new line to the TextBox (Multiline=true) With out making a copy of the whole array. Thanks. George. Tag: Generic GDI+ Error in Datagrid Tag: 66340
  - 21
    - Toolbar dropdown button problem My vb.net form was using a toolbar control with no problems. I needed to modify the toolbar to add a dropdown button showing a menu. After that, the images of my toolbar won't appear at runtime, though they appear at design time. I am not using XP styles and also tried to edit the automatic generated code to make the imagelist control to be the first to load. The problem remains. Can anyone help me with this problem? Thank you. Julian Tag: Generic GDI+ Error in Datagrid Tag: 66337
  - 22
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  - 23
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  - 24
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    - Can I create another form in another thread? hi, everybody I want to create another form in another thread. But if I do this, the form will be created and closed immediately Can I create another form in another thread The purpose I want to do is that before the application is started, I want to display a starting form. So I create the starting form in another thread in the form() handler. Or can I use another method to achieve this thanks Tag: Generic GDI+ Error in Datagrid Tag: 66325

Hello

on one client machine (Win 98, 128 MB RAM, 82% Resources free) there are red crosses inside the datagrids of my App. instead of data
Sometimes the message "Generic GDI+ error" comes up. Everything else seems to work (i.e. normal textboxes)
If one row in the datagrid is clicked, the data only in this field is shown
Installation of .NET framework ran without errors

What can i do, please
Thank yo
Dir

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RE: Generic GDI+ Error in Datagrid by anonymous

anonymous
Wed Feb 11 17:31:11 CST 2004

I have a similar problem. On one of my client's machines, a Generic GDI+ error would come up. There would then be a box with a red x where a Label was being used. I found that it was caused by a '-' being in the text. I changed to a TextBox and fixed that. He still gets a Generic GDI+ error when he tries to print.

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