ListBox: only repaint the items, not other area, in some cases

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  - 1
    - MouseHover event during drag and drop operations Hi, I am writing a classic, "Explorer"-like app in vb.net 2003 (dotnetfx1.1). I have written code to handle the dragging and dropping of items from a ListView on the right hand part of the form to a TreeView on the left part of the form. When the user pauses over a node in the TreeView in the middle of a drag and drop operation, I'd like the node to automatically expand to reveal the child nodes, just as you see in many commercial applications. However, I am unable to create this behaviour because the TreeView control does not fire the MouseHover event whilst in the middle of a drag and drop operation. Are there any workarounds to this? Regards, James Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101675
  - 2
    - PropertyGrid Hi there all, I've used the property grid control in the past and it is a very nice control. But i wonder is there a way to switch the left and right columns, for languages the use RTL the left column should be the value column and the right column should be the property name column. Is there a way to achive this without writing the control from scratch ? I've explored all of the properties and methods of the property grid and didn't found a hack for this , MS are you listening , why dont you expose a property for this ? 0L Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101674
  - 3
    - Gui thread, memory leak, and garbage collection This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C68A59.A0F96860 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi all,=20 I seem to be chewing up memory at a nasty rate when my app runs. It has a polling loop and not surprisingly this is the part that keeps = doing it. I think I've located the line that is my main offender and its when I = marshal to get back onto the GUI thread so I can update my controls. private void KPI_ScreenUpdate(KPI KPIType) { if (this.InvokeRequired) this.Invoke(new KPI_ScreenUpdateDelegate(KPI_ScreenUpdate), new = object[] { KPIType }); else { DPL_Units_Through.Value =3D myKPI_Shift.Units_Through; DPL_Shift_Time.Value =3D tmpElapsed.ToString(); DPL_Elapsed_Setup_Time.Value =3D tmpSetupElapsed.ToString(); } Now what I've noticed is that anytime I create an object using 'NEW' = keyword in my loop (called every n seconds) .. I can watch the memory = usage of my app go up and never down. So mostly I've been ensuring that I never create an object in one of = these loops. But I thought that the garbage collector would deal with these objects = once they go out of scope .. and I dont know any other way except the = above snippet to ensure I dont cross thread for the control update. Will the garbage collector keep my memory under control if I use it = implicitly ??? or am I doing something fundementally flawed when = marshalling threads ? Regards Bob ------=_NextPart_000_0006_01C68A59.A0F96860 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 6.00.2900.2873" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>Hi all, </FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I seem to be chewing up memory at a = nasty rate when=20 my app runs.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>It has a polling loop and not = surprisingly this is=20 the part that keeps doing it.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>I think I've located the line that is = my main=20 offender and its when I marshal to get back onto the GUI thread so I can = update=20 my controls.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV> <P><FONT face=3DArial size=3D2>private void KPI_ScreenUpdate(KPI=20 KPIType)<BR>{</FONT></P> <P><FONT face=3DArial size=3D2>if = (this.InvokeRequired)<BR>   =20  this.Invoke(new KPI_ScreenUpdateDelegate(KPI_ScreenUpdate), new = object[] {=20 KPIType });<BR>else</FONT></P> <P><FONT face=3DArial size=3D2>{</FONT></P> <P><FONT face=3DArial size=3D2> DPL_Units_Through.Value =3D=20 myKPI_Shift.Units_Through;<BR> DPL_Shift_Time.Value =3D=20 tmpElapsed.ToString();<BR> DPL_Elapsed_Setup_Time.Value =3D=20 tmpSetupElapsed.ToString();</FONT></P> <P><FONT face=3DArial size=3D2>}</FONT></P> <P><FONT face=3DArial size=3D2></FONT> </P> <P><FONT face=3DArial size=3D2>Now what I've noticed is that anytime I = create an=20 object using 'NEW' keyword in my loop (called every n seconds) .. I can = watch=20 the memory usage of my app go up and never down.</FONT></P> <P><FONT face=3DArial size=3D2>So mostly I've been ensuring that I never = create an=20 object in one of these loops.</FONT></P> <P><FONT face=3DArial size=3D2>But I thought that the garbage collector = would deal=20 with these objects once they go out of scope .. and I dont know any = other way=20 except the above snippet to ensure I dont cross thread for the control=20 update.</FONT></P> <P><FONT face=3DArial size=3D2>Will the garbage collector keep my memory = under=20 control if I use it implicitly ??? or am I doing something fundementally = flawed=20 when marshalling threads ?</FONT></P> <P><FONT face=3DArial size=3D2>Regards = Bob</FONT></P></DIV></BODY></HTML> ------=_NextPart_000_0006_01C68A59.A0F96860-- Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101672
  - 4
    - Windows Installer projects adding to startup. There is a MSN like windows application developped in C#, for which i have created a setup (installer) project using visual studio 2003, and the setup works fine for me. But further i would like to specify, whether to add this to windows start up during the installation. after few hours of googling i'm still clue less on this; so any help provided is greately appriciated. thankx Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101670
  - 5
    - Issues with multiple GUI threads (ó#, .NET 1.1) Hi! I already posted this message in microsoft.public.dotnet.framework, but I see almost no reaction, so I decided to re-post it to others newsgroups, too. I just wonder if anybody has faced this problem before and could help to troubleshoot it. Following is my original message. Thanks for your attention. Alexei Adadurov (alexei.adadurov at super-lab dot ru) --------------------------------------------------------------------------------------- Hello! I am writing a desktop application that uses multiple GUI threads to interact with the user. Secondary GUI thread creates a main form for this thread, having application's main form as its parent and calls System.Windows.Forms.Application.Run() with this newly created form. The problem is that, under certain conditions (described below) secondary GUI thread strangely crashes after it has exited the 'threadstart' function. The crash is 'Unhandled access violation exception' (0xc000000a) in ntdll.dll with the following call stack: ntdll.dll!_RtlFreeThreadActivationContextStack@0() + 0x1eda4 kernel32.dll!_ExitThread@4() + 0x39 kernel32.dll!_BaseThreadStart@8() + 0x3d My environment is .NET 1.1, Microsoft Windows XP SP2. And yes, it crashes on another machines, too. Condition for crash is that thread crashes only after I create and display a modal dialog box (another custom form), heaving main form for GUI thread #2 as Parent. This dialog box is used to display messages to the user instead of System.Windows.Forms.MessageBox (it has enhanced functionality like "Don't show this anymore" checkbox and timeout timer allowing it to be dismissed if user haven't clicked any buttons. When I switch back to System.Windows.Forms.MessageBox everything is fine. As this issue occurs in a big solution, I created new simple little CrashTest project to simulate this behavior and isolate my problem, but so far I haven't succeeded. Does anyone know what could cause this behaviour? Best regards, Alexei N. Adadurov (alexei.adadurov at super-lab dot ru) Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101668
  - 6
    - Good "pattern" for data entry forms... I am new to .NET Windows Forms but am currently using Visual Studio 2005 primarily with VB.NET. I am in the process of creating an application that is going to have several different forms that allow for editing records in a table in my SQL Server 2005 database, each form serving a different purpose and showing some same and some different fields. Let's say it's a table called Tickets. My question is this... It should be noted that there are business rules associated with Tickets, and the fields contained therein. Can you suggest a pattern for these data editing/entry forms which will allow for creating new records, deleting existing records, and updating existing records? The pattern would include things like 1) how I should get and store data for the current record while user is working on it, 2) How should data be populated into controls on the forms (e.g. databound vs. manually filled in from some class or dataset, 3) how should I implement business rules, 4) how I should persist data out to database, etc. Any guidance would be very much appreciated. Perhaps there are even online articles on this that you could point me to, or a good book(s). Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101666
  - 7
    - Show method of Panel is very slow Hi all, I'm looking at trying to improve the performance of showing a bunch of controls on a panel. I have a class that extends Panel. In that class, I do the following: this.SuspendLayout(); this.Hide(); //add controls to "this" AddControls(); this.ResumeLayout(); this.Show(); I have placed timing code in the above and the invocation of the Show method is extremely slow (relatively speaking to everything else). All of the other operations (including my custom AddControls method) take less than half a second. Meanwhile Show always takes anywhere from a second and a half to two seconds. I have to use the above ordering in order to ensure the Panel gets scroll bars to display properly since each invocation to the above code can result in a completely different set of controls (ranging from 1 control to 50 or more controls). Also, if I don't use Hide first, then the insertion of the controls can end up taking over 2 seconds. The only paths I can think of pursuing are either: a) finding some other way to get the Panel to figure out how much it needs to scroll (i.e. something like Invalidate), and/or b) determining why the show takes so long on each of contained controls Any suggestions on how I could pursue A or B or if there is an option C? Each of the controls I add are custom controls. Thanks, Novice PS Not that it matters (since .Net is .Net) - but I'm using C# Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101665
  - 8
    - Strange resizing problem with datagrid control I have a standard windows datagrid on my windows form and a custom combo box datagrid column as one of the columns in the datagrid. Sometimes when I start scrolling the datagrid it goes into a strange resizing mode and lets me change the size of the datagrid at runtime while I hold down my mouse instead of scrolling. It's really strange and seems to be related to the custom combo box datagrid column that I'm using. Any ideas as to what I should look for to fix this? I can post up some sample code if that is helpful. I'm using VB.Net, .Net 1.1 and Visual Studio 2003. Thanks, Jason Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101664
  - 9
    - Found GDI leak in TreeView (anyone know about it?) I have found what seems to be a leak of GDI resources in the .NET TreeView. I'm not entirely sure it's the .NET code or the underlying OS Common control but here's the skinny: If you use the Checkboxes property and set it to true on a TreeView it will leak 1 or 2 bitmaps and 2 memDCs every time you create and dispose of such a treeview. Our application has a browser-like UI parts of the UI are changing as controls get removed and destroyed. This leak eventually leaks too many GDI resources resulting in a crash. I was using the GDIUsage tool posted at http://msdn.microsoft.com/msdnmag/issues/03/01/GDILeaks/default.aspx to verify this and I put together a small app that exhibits the behavior. Start a new project, create a new form and paste this into your code to try it out. Click the create a tree, then the middle button to remove/dispose/GC. You'll notice that the tree with the checkboxes leaks resources and the one without checkboxes leaks nothing. We are on VS2k3 using .NET 1.1 SP1. Do the MS folks know about this and is there a patch? ==================code================ public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Panel TreeViewPanel; private System.Windows.Forms.Button CreateCheckTreeButton; private System.Windows.Forms.Button CreateNoCheckTreeButton; private System.Windows.Forms.Button DisposeTreeButton; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public Form1() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <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 code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.TreeViewPanel = new System.Windows.Forms.Panel(); this.CreateCheckTreeButton = new System.Windows.Forms.Button(); this.CreateNoCheckTreeButton = new System.Windows.Forms.Button(); this.DisposeTreeButton = new System.Windows.Forms.Button(); this.SuspendLayout(); // // TreeViewPanel // this.TreeViewPanel.Location = new System.Drawing.Point(24, 16); this.TreeViewPanel.Name = "TreeViewPanel"; this.TreeViewPanel.Size = new System.Drawing.Size(680, 400); this.TreeViewPanel.TabIndex = 0; // // CreateCheckTreeButton // this.CreateCheckTreeButton.Location = new System.Drawing.Point(24, 440); this.CreateCheckTreeButton.Name = "CreateCheckTreeButton"; this.CreateCheckTreeButton.Size = new System.Drawing.Size(152, 40); this.CreateCheckTreeButton.TabIndex = 1; this.CreateCheckTreeButton.Text = "Create TreeView with CheckBoxes"; this.CreateCheckTreeButton.Click += new System.EventHandler(this.CreateCheckTreeButton_Click); // // CreateNoCheckTreeButton // this.CreateNoCheckTreeButton.Location = new System.Drawing.Point(552, 440); this.CreateNoCheckTreeButton.Name = "CreateNoCheckTreeButton"; this.CreateNoCheckTreeButton.Size = new System.Drawing.Size(152, 40); this.CreateNoCheckTreeButton.TabIndex = 2; this.CreateNoCheckTreeButton.Text = "Create TreeView without CheckBoxes"; this.CreateNoCheckTreeButton.Click += new System.EventHandler(this.CreateNoCheckTreeButton_Click); // // DisposeTreeButton // this.DisposeTreeButton.Location = new System.Drawing.Point(288, 440); this.DisposeTreeButton.Name = "DisposeTreeButton"; this.DisposeTreeButton.Size = new System.Drawing.Size(152, 40); this.DisposeTreeButton.TabIndex = 3; this.DisposeTreeButton.Text = "Remove and Dispose of the Tree"; this.DisposeTreeButton.Click += new System.EventHandler(this.DisposeTreeButton_Click); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(728, 510); this.Controls.Add(this.DisposeTreeButton); this.Controls.Add(this.CreateNoCheckTreeButton); this.Controls.Add(this.CreateCheckTreeButton); this.Controls.Add(this.TreeViewPanel); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } private TreeView CreateTreeControl() { TreeView tree = new System.Windows.Forms.TreeView(); tree.BorderStyle = System.Windows.Forms.BorderStyle.None; tree.Dock = System.Windows.Forms.DockStyle.Fill; tree.ImageIndex = -1; tree.Location = new System.Drawing.Point(3, 16); tree.Name = "TheTree"; tree.ShowLines = false; TreeViewPanel.Controls.Add(tree); tree.Nodes.Add("Node1"); tree.Nodes.Add("Node2"); tree.Nodes.Add("Node3"); return tree; } private void CreateCheckTreeButton_Click(object sender, System.EventArgs e) { TreeView tree = CreateTreeControl(); // Add checkboxes tree.CheckBoxes = true; } private void CreateNoCheckTreeButton_Click(object sender, System.EventArgs e) { CreateTreeControl(); } private void DisposeTreeButton_Click(object sender, System.EventArgs e) { while (TreeViewPanel.Controls.Count > 0) { Control c = TreeViewPanel.Controls[0]; TreeViewPanel.Controls.Remove(c); c.Dispose(); } // Invoke the GC GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect(); GC.WaitForPendingFinalizers(); } } ==================endcode-============= Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101658
  - 10
    - Capturing mouse events (Mouse up and down on the desktop) Hi, I am trying to capture the mouse events when the user clicks on the desktop not the winform. I looked at the mouse_event function but MSDN documentation says that it is suppressed in win NT/2000/XP. What I am trying to do is to get print screen for a section on the desktop every number of seconds. And I want the user to be able to select that region. Any help will be appreciated. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101656
  - 11
    - Smart Client Fails When Run On Machine With .NET 2.0 I have a Smart Client application that was written in .NET 1.1 long before .NET 2.0 ever came out. It works great. It uses web services and because we have many development environments, it dynamically gets the base Url to construct the Url for the web services by simply calling Application.ExecutablePath. Like I said, this all works great on a computer with .NET 1.1 Framework installed, but it now fails on a computer that has both .NET 1.1 and recently installed .NET 2.0! So much for Microsoft's side by side execution! The error I get is as follows: System.Security.SecurityException: Request for the permission of type System.Security.Permissions.FileIOPermission, 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.Reflection.Assembly.VerifyCodeBaseDiscovery(String codeBase) at System.Reflection.Assembly.GetName(Boolean copiedName) at System.Reflection.Assembly.GetName() at System.Windows.Forms.Application.get_ExecutablePath() I have tried all kinds of things, but trying to get at the launch Url always fails with the FileIOPermission Security Exception. I have tried several other things like: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnforms/html/winforms05152003.asp But the following returns null: AppDomain domain = AppDomain.CurrentDomain; object obj = domain.GetData("APP_LAUNCH_URL"); string appLaunchUrl = (obj != null ? obj.ToString() : ""); And calling: string configFile = domain.SetupInformation.ConfigurationFile; Throws the same FileIOPermission Security Exception. I also tried: http://www.dotnet247.com/247reference/msgs/44/224782.aspx But could not get it to work. If anyone has any ideas they'd like to throw my way, I'd appreciate it. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101655
  - 12
    - ClickOnce Files I published a clickonce application and a couple new versions. I was wondering what is the purpose of the WinClickOnce_1_0_0_0.application WinClickOnce_1_0_0_1.application files on the web server is. It looks like only the WinClickOnce.application file is used (maybe for rollback of versions). Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101647
  - 13
    - Embedding a resource at runtime Hi there. Does anyone know if it's possible to embed a new resource into an assembly at runtime as well as update an existing (assembly) resource. Any assistance would be appreciated. Thanks. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101645
  - 14
    - How to change the borderColor for a panel control Hi, I am using VB .net 2005 to create my windows form application , i have a panel control in my main form , i want to change the border color of the panel to red color , could any one help me to resolve this problem Thanks in advance Sajin Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101637
  - 15
    - Cant determine Valid Ordering Hi, I keep getting my VS installations stuck, it this is on a new system that hasn't had any beta installed. Message is like "Cant Determine valid ordering" And the unistall tool doesn't work for the RTM Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101629
  - 16
    - Saving settings to app.config using C#? Hi, How do I save updated values for Application Settings defined with an Application scope? I created the Application Settings using the Project Properties dialog in VS2005. I am trying to create a dialog box where users can save their preferences. The dialog reads values from the app.config, then update those values. I want these setting to apply to all users of the application. I have tried code like the following: mySettings["Latitude"] = decimal.Parse(txLat.Text); mySettings["Longitude"] = decimal.Parse(txLon.Text); mySettings.Save(); The code runs but does not save the settings. Thanks Jeff. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101621
  - 17
    - ClickOnce and Firefox How can I get ClickOnce to work with a browser other than IE? I was reading http://blogs.msdn.com/saurabh/archive/2006/03/02/541988.aspx But couldn't figure out how to "all you need to do is generate the shortcut file " How do I generate the shortcut file? Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101620
  - 18
    - CancelButton & ShowDialog Hello there, I have a form that gets shown using the ShowDialog() method. This form then has it's accept and cancel button properties set. If hte user hits the cancel button / hits ESC, the form is closed and they're returned to the parent form. If the use then clicks the accept button / hits enter, a different part of the form become enabled for them to work with. Here's where I'm running into a bit of a problem: When I enable this new part of the form, I also change the forms Accept & Cancel button properties to a different set of buttons to save / cancel data changes. If the user hits the second cancel button, no changes occur, the new part of the form becomes disabled again, and the control focus is returned to first part of the form (which was also disabled when the second part was enabled). However, in my testing, if the user hits the ESC key, the form is closed no matter what is in the button event handler. From my trial and error testing, it seems that this is a global property of any dialog that is displayed using ShowDialog, and has it's CancelButton property set. Now, I've coded up a work around for this by having the cancel button set a form variable, and then writing a Closing event handler to check to see if that variable is set. But that seems like a poor way of doing it, and that there should be another option. Any suggestions / comments? Thanks Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101619
  - 19
    - link two datagridviews? hi, i have two tables, related by a one to many relationship. i want a form with both tables showing, and when i click on a record in the 'one' datagridview, i want the 'many' view to show only the related records. also...i want to be able to see all the records in the 'many' view when i want. and...i want both the 'one' and 'many' views to have navigation menu strip. i've been searching around and have created a relation between the two table adapters, but am not sure how to make the form behave the way i want? i would think this could be pretty automatic, so i am holding off writing code for click events until i hear if there is a better way. thanks! Fred Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101618
  - 20
    - Form resource files Hi there. I apolgize for posting this again (from June 2nd) but I've been researching for many days now with no success. I have an app that will be reading arbitrary ".resx" or "resources" files passed on the command line for instance. Given only a resource file IOW, does anyone know: 1) How the app can determine if the passed resource file contains (localized) form resources (i.e., it stores a form) 2) If it does contain (localized) form resources, how can I then generate that form dynamically Note that the native .NET utility "Winres.exe" is able to do this but I can't figure out how (not without using techniques that appear to be undocumented). Any help would be greatly appreciated. Thanks. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101617
  - 21
    - Word Document From Windows Form Project Hi, In my VB.net windows form, I use a Word application with VSTO. I'd like to after the button click event the Word document appears. Please some help!! Bye Cris Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101612
  - 22
    - ClickOnce and installaion icon When a ClickOnce app is being installed there is a window that says "Installing" which has the application name, an icon (defult square windows icon) and a progress bar. Our app does have a custom icon set,but it doesn't get used in this windows. I have looked all over, even checking into custom comman line build of the manifest, but don't see how to get OUR icon into that window during installation/updating. Does anyone know how to do this? thanks Julie Lerman Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101610
  - 23
    - Caching Application Block fails to initialize Hi. I'm trying to use the Caching Application Block in a Windows Forms application. I've configured it and all worked fine. But after some tests it does not work anymore. When I call the method CacheFactory.GetCacheManager("Application Cache Manager"), it throws an exception with the following message: "Could not find file 'Application\2085804222\Val'." The problem is not the name of the cache because it was working. I don't know whether there is a limit for the cache, but I couldn't get it working. The cache is configured to use isolated storage (store data on disk). Does anyone have any idea or suggestions? Thanks Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101603
  - 24
    - Word Document From Windows Form Project Hi, In my VB.net windows form, I use a Word application with VSTO. I'd like to after the button click event the Word document appears. Please some help!! Bye Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101600
  - 25
    - Dataviewgrid horizontal scrollbar not appearing? I have the scrollbars property of my grid set to "both". When I have lots of records, the vertical scroll appears ok, but if the user resizes columns wider so they go off the side of the form, the horizontal scrollbar never appears. Any clues what I am doing wrong? Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101597
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  - 1
    - changing setup language how can i change the language of my setup project in VS 2005? the list of avalible languages is silly short - about 11 languages i think. how can i add there more languages? i need polish and some other eastern and central european languages - i know that windows installer supports them and lots of other languages but vs does not let me use them. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101595
  - 2
    - Binding, combo and 2 dataset Hello, The situation, I have 2 tables(TABLE1 and TABLE2), the first one with all the information, the second one has the language code(fields LAN_ID, LAN_COD), the first column is a foreign key in the first table. First table : (FIELD1, FIELD2....., LANG_ID). Nothing special. On the form some textbox binds to a dataset. On the same form, the combo binds to an another dataset In the comboBox, I'd like to select the language when I insert a row in the main table. Of course, after, when I navigate, the language must change depending of the selection at creation time. But I don't know how I can do that with comboBox Do you have an idea how to do that ? Thanks, Thanks, Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101593
  - 3
    - example on how to edit excel with a datagrid? Hey, Newbie to using datagrids here. I managed to get a datagrid that took an Excel spreadsheet's information and then showed it in a windows form. Most of the online examples for datagrids are for webforms, so I didn't get much useful info from my search. I did learn enough to have the D column from Excel (composed of true or false values) show as a checkbox column in the datagrid. What I want to know is how to update excel so if a user checks a box in that column, the proper row in the spreadsheet is updated. So if the checkbox in the datagrid's 10th row is checked, the spreadsheet's 11th row, D column changes to true. (11th row because the first is the table header) Can anyone help me please? Thanks. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101592
  - 4
    - NativeWindow & clipping Hello, I am using the NativeWindow class to create a popup window which I paint using the UpdateLayeredWindow. Everything works ok, but I do have one problem: my popup window always overlaps everything instead of staying together with the parent form. For example, imagine this: Form1 is a parent MDI container, and Form2 is a MDIChild. On Form2 if I have a combobox and I drop it the combo box drop down window doesn't overlap over the Form1's borders ever, instead it stays confined within the MDIChild area. But my popup window overlaps even the MDI parent... This is how I create the window: CreateParams params1 = new CreateParams(); params1.Caption = "Win"; this.RecalculateLayout(); Point pos = this.ChooseLocation(new Point(x, y), this.currentSize); x = pos.X; y = pos.Y; this.screenPosition = new Point(x, y); Size size1 = this.currentSize; Point point1 = this.screenPosition; params1.X = x; params1.Y = y; params1.Height = size1.Height; params1.Width = size1.Width; params1.Parent = IntPtr.Zero; params1.Style = -2147483648; // WS_POPUP params1.ExStyle = 0x88; // WS_EX_TOOLWINDOW + WS_TOPMOST if (this.isLayered) { params1.ExStyle += 0x80000; WS_EX_LAYERED } if (base.Handle == IntPtr.Zero) { this.CreateHandle(params1); } this.currentSize = size1; this.currentPoint = point1; And this is how I draw it: Bitmap bitmap1 = new Bitmap(size.Width, size.Height, PixelFormat.Format32bppArgb); using (Graphics graphics1 = Graphics.FromImage(bitmap1)) { Rectangle rectangle1; SIZE size1; POINT point1; POINT point2; BLENDFUNCTION blendfunction1; rectangle1 = new Rectangle(0, 0, size.Width, size.Height); this.Draw(graphics1, rectangle1); IntPtr ptr1 = IntPtr.Zero; ptr1 = new IntPtr(NativeMethods.GetDC(IntPtr.Zero)); IntPtr ptr2 = new IntPtr(GDI.CreateCompatibleDC(ptr1)); IntPtr ptr3 = bitmap1.GetHbitmap(Color.FromArgb(0)); IntPtr ptr4 = new IntPtr(GDI.SelectObject(ptr2, ptr3)); size1.cx = size.Width; size1.cy = size.Height; point1.x = point.X; point1.y = point.Y; point2.x = 0; point2.y = 0; blendfunction1 = new BLENDFUNCTION(); blendfunction1.BlendOp = 0; blendfunction1.BlendFlags = 0; blendfunction1.SourceConstantAlpha = alpha; blendfunction1.AlphaFormat = 1; NativeMethods.UpdateLayeredWindow(base.Handle, ptr1, ref point1, ref size1, ptr2, ref point2, 0, ref blendfunction1, 2); GDI.SelectObject(ptr2, ptr4); NativeMethods.ReleaseDC(IntPtr.Zero, ptr1); GDI.DeleteObject(ptr3); GDI.DeleteDC(ptr2); } As I said, the window functions very well, I just don't know why doesn't it share the same clipping as the window that spawned it. I tried to set the Form2 as parent but you cannot set a parent on a WS_POPUP window. I tried to get the DC from the form handle instead of the DC from a null handle but its the same result... So, my question is: what am I missing here to make my popup window share the same viewport, if you want, as the form that opens it, instead of overlapping everything as if it was drawn over the entire desktop? Any help will be appreciated, thank you, iulian Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101589
  - 5
    - General Discussion About Successfully Implementing WinForms Apps I'd like to initiate a general discussion about implementing WinForms apps on computers that one may never have access to. I've initiated an Alpha version of a WinForms app. On all of my Windows test machines it runs fine. On the machines of some of my Alpha testers, it run fines. But some Alpha testers are experiencing strange problems. I realize that my quandary is open-ended but I'd like to hear from others who have released WinForms .Net apps before me. What are some of the key things that were causing problems on some of the machines they were tested on? -- Robert W. Vancouver, BC www.mwtech.com Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101575
  - 6
    - Track Bar Hi, I am trying to create a control that is similar in functionality to the TrackBar control. I cannot figure out which event to use for sliding the image that serves as a marker over the line. I have tried the MouseMove and MouseDown without success. Can anyone point me in the right direction? Thanks in advanced Ben Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101574
  - 7
    - advanced color dialog Hi all, I am using vb .net 2005 to implement my application , i am using a color dialog box in my code , basically when it loads it shows "basic colors" , "custom colors" and link button "define custom colors" . but when i click define custom colors it shows the same thing above mentioned as well as in the right side one color panel , RGB value , hue,sat,lum . i want to implement that part with color slider (i don't want to show basic colors and custom colors) Plz help me to implement this Any help Thanks and regards Sajin Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101571
  - 8
    - datagridview column sort question I'm using a windows form in Vb.net 2.0. I have a datagridview that is populated with data. It is for viewing only, i have turned of allowing edits, adding, deleteing and column reorg. when i click on the datagridview and go to edit columns and select a column and look at the SortMode, it's set to automatic. However, when i run the app and click on that column (with data in the grid) it doesn't sort, it doesn't have the little markers on the column header either. I understand that you can code behind to get the data to sort, but I was thinking this was suppose to work as well. anyone know what I'm not doing. seems if the sortmode is on automatic it should sort them. The columns i'm talking about are textbox columns. I have a bindingsource that was created when i drub a data source object onto the form. the data source object was a object. thanks for the help shannon Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101569
  - 9
    - Word document in a WinForm Hi, In my visual basic .net winform application, I use a web browser control to embed an Office document. The Office document can be loaded and save to its original location successfully. But when I want the Office document be saved as another copy to another location without prompt users by using command as below, I get an exception "Trying to revoke a drop target that has not been registered". AxWebBrowser1.ExecWB(SHDocVw.OLECMDID.OLECMDID_SAVEAS, SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER, "C:\testing.doc", Nothing) So, how do I can save the Office document as another copy to another location without prompt user the Save As dialog box? Chyong Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101563
  - 10
    - Form resource files Hi there, Given an arbitrary ".resx" file (not ."resources"), does anybody know how I can identify that this file actually contains a Windows form (in code). Once identified, I then want to collect information about the form and all its controls. Presumably I would want to read this file into a "System.Windows.Forms.Form" class so I can obtain the necessary info. How would I do this. Thanks.in advance. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101558
  - 11
    - "Re" Configure DataSet with Wizard Once you have created a dataset in the Data Sources tab, there does not seem to be a way to change the Data Connection. When you open the Configure DataSet Wizard for the second time you begin on the second screen (the first is the "Choose Your Data Connection" which is not enabled). Subsequent refreshes always refer to the Connection established during creation in the designer. However, what happens if your development environment changes and you need to point to a different connection? You don't want to delete the datasource and start all over. Isn't there a way to change the connection which occurs at design time and therefore governs the refresh? Changing the connection at runtime is not a problem, just change the entry in My.Setting. Unfortunately, making a change here during design time is not reflected in the Data Source Configuration Wizard either. Am I missing some logic? -- Michael Hockstein Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101556
  - 12
    - ComboBox Text Value I have a series of comboboxes on a control. The comboboxes have dropdowns. When a user selects an item in the dropdown, I am trimming the value and making some changes to the value and setting ComboBox.Text equal to the new value. For some reason the new value is not showing up in the ComboBox. Instead, I get a blank Combobox. I have tried setting the ComboBox.SelectedIndex = -1 before setting the Text value but this does not correct the problem. Any idea what I might be doing wrong? Jerry Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101553
  - 13
    - BackgroundWorker and multiple Threads I am using the new BackgroundWorker for an I/O intensive application and it works great!!! I have a few questions though that hopefully someone can answer. I know this is possible with other components, but am curious as to what BackgroundWorker can do. 1) All the documentation indicates a single DoWork. Can I assign multiple delegates to the DoWork event? It seems like I ought to be able to since it is a general event. 2) If I do, will it spawn a thread for each delegate? The events can fire sequentially. 3) Do I need a RunWorkerCompleted delegate for each DoWork delegate? Here is where the simple utility afforded by BackgroundWorker starts to break down. I am reading and converting hundreds of files and what I want to do is have 3-5 threads working on this (with the ability for the user to cancel all of the work). I know this is possible using general threading, but can BackgroundWorker accomplish this? Roger Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101545
  - 14
    - Design time errors I'm looking for any information on precisely what the IDE does when opening a form in design mode. I'm pulling my hair out trying to fix some bizarre design-time errors screwing up some forms, and it would help if I knew precisely how the IDE creates and initializes the form and what methods are called. For example: Does it run a constructor? Does the form have to have a default constructor? What happens if the form does not have a default constructor? Does the IDE just in effect bypass the constructor and just call InitializeComponent? Does it call OnLoad? etc. etc. Thanks for any info on this. ====================== Clive Dixon Digita Ltd. (www.digita.com) Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101544
  - 15
    - Annoying form flickering problem Hi all, We have a windows forms application with different controls used inside, each control has several input items such as textboxes and some treeviews.. etc. We have been trying to eliminate flickering issues when loading different controls or switching to different views with no luck, and have been trying different suggested methods to get rid of the flickering such as: - this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true); - this.SetStyle(ControlStyles.AllPaintingInWmPaint, true); - SuspendItemsLayout(); - ResumeItemsLayout(); Unfortunately using the above code in each control or the main form didn't help too, I'm wondering desperately if there is another way to fix this annoying problem? FYI: We are using Visual Studio 2005 / .NET 2.0 running on mainly Windows XP Professional SP2 on 3GHz multithreaded CPU and 1GB RAM. Thanks for your help. Maya Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101542
  - 16
    - out of synch dataset and datagrid using CurrentRowIndex C# I am trying to use the CurrentRowIndex function to get a datarow from my dataset. For example: I have a datagrid that is filtered on Level. The records in the datagrid show only those records. These are records 50-54. When I use the CurrentRowIndex, I get the current row value of 0-5. I am expecting a current value of 50-54. My code looks like this: // this should return a number between 50 and 54. Instead it returns a number // between 0 and 5. int curRowIndex = dgEmp.CurrentRowIndex; // as you can guess, instead of getting records 50 to 54 I am getting records // 0 to 5. DataRow dr = (DataRow)dsEmp.Tables["Emp"].Rows[curRowIndex]; My question is how do my datagrid and dataset get of synch? How do I get them back in synch? Is there a better way to do this? Any help is appreciated. Thanks, Robs Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101536
  - 17
    - Intercept Scroll Event of Panel Hi, I have a BigPanel inside a SmallPanel with AutoScroll property set to true. I want to intercept scroll events of the BigPanel. How can I do that ?? Thanks, Akhil Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101534
  - 18
    - ShowDialog and Load Event I am trying to troubleshoot an application I inherited. On a form, there is a button, that when clicked loads a user control with ShowDialog; btn_Click(object sender, System.EventArgs e) { ucForm1 UCForm1 = new ucForm1(); UCForm1.ShowDialog(this.ParentForm); .... } in the ucForm1.cs there is a Load event defined; ucForm1_Load(object sender, System.EventArgs e) { ..... } When the app runs and the user clicks the button, the dialog form appears but the the load event is never triggered. Does the Load event not get fired when a form is presented using the ShowDialog method? If it doesn't, is there another event I can use to run the code that I wanted to run in the load event? Or am I missing something? thanks for any help you can provide. Dan dchman Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101533
  - 19
    - Microsoft Feedback Center Bug: .NET User Control errors after installing Some of you may already be aware of this problem, I directed one previous poster to this bug some weeks ago. I reported this bug April 12th. It is now ranked third!!! But, after 6 weeks, Microsoft have responded by resolving the bug as "Not Reproducible" not once, but twice!! I know it is reproducible, every one I have asked has been able to reproduce it. The bug is this. If you statically embed a .NET Forms UserControl into web pages using OBJECT tags, Internet Explorer will blow up once you install the ActiveX disablement patch/patches KB912812 (and the subsequent rollup). Depending on the version of .NET you have, Internet Explorer will a) crash (.NET 2.0), or b) fail to load/unload the UserControl correctly leaving orphan controls strewn over subsequent web pages (.NET 1.1). This is a serious problem which MUST be affecting consumers of .NET Forms UserControls right now. Not everyone will have been able (or even desire to) rejig web sites and other material delived as web pages to use dynamic loading techniques. Anyone affected by this, please reply. I need some noise to stop this bug from being ignored / swept under the carpet. Does anyone know of other channels than the Feedback Center I and others affected can pursue? For the record, my team have reluctantly moved to dynamic loading. But this comes at a cost when authoring pages. I am continuing to agitate for this bug because I opened it and if I dont pursue it, others can't. That's the way the Feedback Center works. Others' attempts to report this bug will be resolved as Duplicate. Hopefully, Peter Bromley ADInstruments Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101532
  - 20
    - Microsoft Web Browser Hi, I am using VS .NET 2003 and I have a .NET Windows Forms application in C++ .Net. I want to add a web browser control on one of the forms. This is how I am currently doing it: 1. Added the COM component Microsoft web browser to the form. This actually generate a couple of wrapper Dll's AxInterop.SHDocVw.dll and Interop.SHDocVw.dll. Everything works fine and I can navigate the HTML document using the control . However, I need to deploy these two additional DLL's AxInterop.SHDocVw.dll and Interop.SHDocVw.dll in order for the application to work at runtime. I am not completely sure if these two Dll's can be redistributed? Can I redistribute these Dll's with my application installer OR I can't? Let me know Thanks, Neelay Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101530
  - 21
    - Panel Problem Hi I'm a newbie to C# and GDI+.I am writing an application that will display some strings from a file on a panel. There are a few of problems I am facing : 1.How do make the panel re-adjust its size when maximizing the form window ?? 2. I'm drawing the strings on the panel. if the number of strings exceeds those that can be displayed in the panel, how can I add a scroll bar to panel so that I can move it up and down to see the remaning strings?? 3.If I switch to another window and come back, the strings that were earlier visible on the panel no longer seem to be visible . How can I solve this issue ?? Any help would be appreciated. Thanx, Akhil Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101529
  - 22
    - Signing the manifest with pfx file Hello, I have the Microsoft Authenticode certificates (PKCS #7 Certificates, .spc and .pvk files) acquired from Verisign. How do I use this certificates to Sign the manifest for ClickOnce deployment. IDE accepts only .pfx files. Importing in Internet Explorer and exporting back doesn't seem like an option. Any advice? Regards, Sajan Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101528
  - 23
    - CAS permissions problem I have a line of code that looks at My.Application.Info.Version. When I hit this line in the debugger, it passes just fine. After I publish the app, it fails when run, saying I need FileIOPermission permissions. However, I've explicitly included FileIoPermission in the CAS settings. Also, I have "Debug this application with selected permission set" selected. So, why does it fail in production, but not in the IDE and what more can I do to increase the permissions for this? Thanks for any help. Barry Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101521
  - 24
    - Sort indicator on label Is there any way to get the little sort indicator (the up/down arrow that is visible by the column header in Explorer when you sort by a column) on a standard label? Note that I'm not using a datagrid - I know that they show on those by default. I'm using a data repeater control from a third party and I'd like to display that indicator on the header labels of that. Thanks. Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101520
  - 25
    - Assembly Resource This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C68586.E5A78230 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Something has mysteriously :) happened to my resource file and now in = InitializeComponent() of my form, it is throwing a = MissingManifestResourceException when it attempts to retrieve an = ImageListStreamer from the ResourceManager (code snippet below). I = opened the .resx file and verified the "imageList.ImageStream" data = exists and it does. ResourceManager resources =3D new ResourceManager(typeof(MyForm)); this.imageList.ImageStream =3D = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList.= ImageStream")); How can I fix this? Regards, Brady A. Williams ------=_NextPart_000_000C_01C68586.E5A78230 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 6.00.2900.2873" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>Something has mysteriously :) happened = to my=20 resource file and now i</FONT><FONT face=3DArial=20 size=3D2>n InitializeComponent() of my form, it is throwing a=20 MissingManifestResourceException when it attempts to retrieve an=20 ImageListStreamer from the ResourceManager (code snippet below).  I = opened=20 the .resx file and verified the "imageList.ImageStream" data exists and = it=20 does.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px"> <DIV><EM><FONT face=3DArial size=3D2>ResourceManager = resources =3D new=20 ResourceManager(typeof(MyForm));</FONT></EM></DIV> <DIV><EM><FONT face=3DArial color=3D#ff0000 = size=3D2>this.imageList.ImageStream =3D=20 = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList.= ImageStream"));</FONT></EM></DIV></BLOCKQUOTE> <DIV dir=3Dltr><FONT face=3DArial size=3D2> <DIV dir=3Dltr><FONT face=3DArial size=3D2>How can I fix = this?</FONT></DIV> <DIV dir=3Dltr> </DIV> <DIV dir=3Dltr>Regards,</DIV> <DIV dir=3Dltr>Brady A. Williams</DIV></FONT></DIV></BODY></HTML> ------=_NextPart_000_000C_01C68586.E5A78230-- Tag: ListBox: only repaint the items, not other area, in some cases Tag: 101519

Sorry I can't clearly describe how to reproduce this problem. Only what
I can confirm is that, in some cases, the listBox just repainted all
items in it, the other area kept the content before.

For example, if another window overlaped on it, after removed that
window, the listBox's items can normally refresh, but the other blank
area kept the content of previous window.

It's very strange. I think listBox does some special things to items
drawing. I don't know how to do.

thx in advance.

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