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- Previous
  - 1
    - Switching between MDI child windows... I have an MDI application that is causing slight problems when I try to programmatically switch between child forms. When I press CTRL+TAB, the forms switch without much of a flicker at all. But when I try to fire an MDI switch from a toolbar button, I get a pretty noticeable flicker. The way I am changing forms is through the use of the Activate() method on the child form. For instance, nextChild.Activate(); I've tried using the ActivateMdiChild method, i.e., this.ActivateMdiChild(nextChild); but it doesn't seem to do anything. Is there something that I'm missing? I really just want to know how the framework Form class handles a CTRL+TAB key press so I can do the same thing. Thanks, Rich Tag: Delegate by Book Tag: 86037
  - 2
    - Smarthclient and crystal rpt viewer Morning all, How is this viewer suppose to be deployed in a Smartclient app. I keeping having my app looking for Keycodev2.dll. I have added this to my project and copied the dll to the folder on the webserver where my exe is. what do I have to do to get this to work. -- Deasun Home Site: www.tirnaog.com Check out: The Code Vault in my forums section. Tag: Delegate by Book Tag: 86036
  - 3
    - OnSetComplete, OnSet methods do not fire I have a datagrid bound to a strongly typed collection implementing iBindingList. When an item is added to the datagrid, OnInsertComplete fires just fine as I would expect it to. However, the OnSet and OnSetComplete methods don't seem to be firing at all. What I really want to do is: When a row is added to the list (NOT the first row), default one of the columns from the row above it. So when row2 gets added, it should automatically have the value from row1's column X. Any thoughts/suggestions? Tag: Delegate by Book Tag: 86035
  - 4
    - Capturing web page into a bitmap via WM_PRINT Hi, I'm copying the image of a web page into a bitmap by loading the page first into the web browser control (AxSHDocVw.AxWebBrowser) and then sending the WM_PRINT message to the control. Everything works fine except for pages that have Flash animations on them. In those cases the bitmap comes out as blank white. My code is similar to the code in this blog: http://kentb.blogspot.com/2005/03/nice-form.html . I don't think there's anything fundamentally wrong with the code as it works fine for web pages that have no Flash animations. I wonder if anyone has encountered similar problems? I'd be also happy if I could somehow disable the Flash animations via MSHTML if that fixed the problem. Regards, Sami Tag: Delegate by Book Tag: 86033
  - 5
    - Problems with custom events Browsing through some online tutorials, I've been tryingto add a custom event to an app I'm developing but I'm having a little problem. Simplifying the code down to the following (a form with a button that fires the event): namespace CustomEvent { public delegate void MyEventHandler(object sender, MyEventArgs e); /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { public event MyEventHandler MyEvent; protected virtual void OnMyEvent(MyEventArgs e) { MyEvent(this, e); } << snip template form code >> private void button1_Click(object sender, System.EventArgs e) { OnMyEvent(new MyEventArgs("Fred")); } } public class MyEventArgs: EventArgs { private string name; public MyEventArgs(string name) { this.name = name; } public string Name { get {return name;} } } } The problem I'm having is that the MyEvent(this, e); call fails in OnMyEvent(...) with the following error: "An unhandled exception of type 'System.NullReferenceException' occurred in CustomEvent.exe Additional information: Object reference not set to an instance of an object." Can anyone explain what I'm doing wrong? Cheers in advance Ant Tag: Delegate by Book Tag: 86032
  - 6
    - Capturing change to TextBox I want to simply capture changes to a TextBox and perform some processing when the user has edited the text. The TextChanged event fires even while the user is editing the text, but I only want to perform my validation when the user finished editing the text and moves off the field (tab, enter, mouse-click somewhere else, etc). The Validated event fires when the user moves off the field but fires even if the user does not change the text! I know I could save the "before value" of the text in a local variable in the Enter trigger and compare this to the current value in the Leave or Validate trigger but this is messy! There must be a simpler way surely. Someone please help! Tag: Delegate by Book Tag: 86026
  - 7
    - LIKE A TRANSACTION Hi, I've developped a windows application: I've added some code in order to lauch a merge replication in SQL. My question is: when this code is executing, is it possible to lock the application?? namely nobody can do anything until the code is ended! Thanks for your help :) Tag: Delegate by Book Tag: 86022
  - 8
    - Compiler error for MessageBox::Show I am getting a very strange compiler error for the following code: catch (OpenGLPanelException *openGLError) { //std::string * errorMessage = new std::string(openGLError->errorString); System::Windows::Forms::MessageBox::Show( "junk" ); //, "OpenGL Error", MessageBoxButtons::OK, //MessageBoxIcon::Exclamation ); exit(1); } The error message is: Compiling... Form1.cpp d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(75) : error C2039: 'MessageBoxA' : is not a member of 'System::Windows::Forms' d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(75) : error C2660: 'System::Windows::Forms::Control::Show' : function does not take 1 arguments d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(246) : warning C4244: 'argument' : conversion from 'double' to 'GLfloat', possible loss of data Build log was saved at "file://d:\MSDev\Shared Projects\OpenGLPanel\Test1\Debug\BuildLog.htm" Test1 - 2 error(s), 1 warning(s) It appears to want to replace the text as if a #define is taking precedence somewhere. The include information is: #include <windows.h> #include <GL\gl.h> #include <iostream> namespace Test1 { using namespace System; using namespace System::ComponentModel; using namespace System::Collections; using namespace System::Windows::Forms; using namespace System::Data; using namespace System::Drawing; using namespace OhioState; If I do not fully scope it, the tooltip seems to indicate MessageBox is the MFC instance. Any help or suggestions? Roger Tag: Delegate by Book Tag: 86012
  - 9
    - Label and Button text not drawing (Type your message here) I have a small assembly that displays dialogs for logging in and message boxes if an error occurs. The button text and label text in the dialogs isn't drawing when the form is opened by either Dialog.ShowDialog() or MessageBox.Show(). In the case of a dialog, some of the labels appear and some do not. The button text doesn't appear for either dialogs or message boxes. The text draws correctly in the Designer. I was able to 'repair' the dialogs by deleting the controls and re-adding them to the form in the Designer. I don't have that option in a MessageBox. Anyone seen this behavior before? -------------------------------- From: Don Dusich ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>N41D2NHa90W/Q0PaoCYfpw==</Id> Tag: Delegate by Book Tag: 86009
  - 10
    - Sources for threads Hi all, Does anybody know where I can find some good examples of using threads in c#.net windows applications? Thanks Gav Tag: Delegate by Book Tag: 86006
  - 11
    - Can I run any app inside a "special" control I'm looking for a control which will allow me to run any app inside a Window/Panel/Tab Specifically I want to be able to save xml files created from XMLSpy to a database in a very specific format - I'd like to run XMLSpy in a window inside this app, then save/retrieve files to/from a sql server db. Not quite seamless integration, but better than nothing. Thanks Tag: Delegate by Book Tag: 86004
  - 12
    - Menu Shortcut Key Not working I have an MDI winform application. One of the menu items is using CTRL+U as the shortcut and it will not invoke the menu item. Here is a list of things I have tried to resolve the problem. 1) Tested CTRL+U in Word to make sure that the keys are working properly. Success 2) Re-Assigned the menu item a different shortcut. Success 3) Re-Assigned a different menu item the CTRL+U shortcut. Failure 4) Created a new project with one form, and a menu item with the CTRL+U shortcut. Success. 5) I can hot key to the menu item (the underllined letters for the menu items). Success 6) I can click on the menu item. Success Controls on the MDI Parent form 1) CDDB control 2) MCI control 3) menu items Controls on the MDI child form the menu item is affecting 1) Labels 2) text boxes 3) tab control with 2 pages 4) 2 grid controls (1 per page) 5) toolbar Any thoughts/suggestions on why CTRL+U won't work? Thanks, Greg Tag: Delegate by Book Tag: 86002
  - 13
    - Making it possible for user to move controls on form, how? How can I make it possible for a user to move a control on a form by selecting it and then using the arrow keys to move it to a new location? For instance suppose I have a form that represents the output of a cheque and I want the user to be able to move the date and amount fields so that they cn be printed out at the correct location on his preprinted cheque stock? Any help or a pointer to some sample code would be greatly appreciated. Thanks, RD Tag: Delegate by Book Tag: 86001
  - 14
    - ISDATE and Regional Settings -- John Tag: Delegate by Book Tag: 85999
  - 15
    - Refreshing Form on Process Hello, I have a windows application written in VB .NET which pulls a lot of data from different databases into one source. This often takes a long time and therefore I track the progress using a progress bar and a status bar. When the program is running and I use another application the form turns white and doesn't refresh itself until the process is complete. Could anyone advice me/provide a VB example of the best way to keep a windows form refreshed when running, but still restrict the user from setting off another process? Many thanks for your advice. Tag: Delegate by Book Tag: 85995
  - 16
    - Reusing GUI elements Hello people, I'm new at .NET development so forgive me if I ask about the obvious. There are several forms in my application that have similar groups of = controls. I would like to extract the UI and functionality into a single entity so = I can reuse it in the application. What is the easiest way to implement it? (I don't really want to create a standalone control since the "grouping" = only makes sense inside this particular application). Thank you, Alex. --=20 Please replace myrealbox with alexoren to reply by email. Tag: Delegate by Book Tag: 85992
  - 17
    - Nasty bug with OwnerDrawn context menus on a ComboBox Have a look at the code below. It's a really simple example where I have added two controls to a form, a textbox and a combo box. Both add owner drawn context menus to the controls, but the combobox will NOT draw custom drawn context menu item. I have tried EVERYTHING (deriving from MenuItem and even tried calling TrackPopupMenuEx directly), but it just won't work! I am currently reflecting over the combobox source code (oh joy!), but if anyone can help me, I will BE SOOOOO VERY GRATEFUL!!!! thanks andrew using System; using System.Drawing; using System.Diagnostics; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace ComboContextBug { /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { private ComboTest comboBox1; private TextBoxTest textBox1; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; /// <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.comboBox1 = new ComboContextBug.ComboTest(); this.textBox1 = new ComboContextBug.TextBoxTest(); this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.SuspendLayout(); // // comboBox1 // this.comboBox1.Location = new System.Drawing.Point(180, 32); this.comboBox1.Name = "comboBox1"; this.comboBox1.Size = new System.Drawing.Size(121, 21); this.comboBox1.TabIndex = 0; this.comboBox1.Text = "comboBox1"; // // textBox1 // this.textBox1.Location = new System.Drawing.Point(180, 98); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(121, 20); this.textBox1.TabIndex = 1; this.textBox1.Text = "textBox1"; // // label1 // this.label1.Location = new System.Drawing.Point(8, 20); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(168, 52); this.label1.TabIndex = 2; this.label1.Text = "Right click this combo and you will see that the OwnerDrawn item does NOT appear!" + ""; // // label2 // this.label2.Location = new System.Drawing.Point(8, 86); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(168, 52); this.label2.TabIndex = 3; this.label2.Text = "Right click this textbox and you will see that the OwnerDrawn item DOES appear!"; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(336, 157); this.Controls.Add(this.label2); this.Controls.Add(this.label1); this.Controls.Add(this.textBox1); this.Controls.Add(this.comboBox1); this.Name = "Form1"; this.Text = "Combo Context Menu Bug"; this.ResumeLayout(false); } #endregion /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } } public class ComboTest: ComboBox { public ComboTest() { base.ContextMenu = new ContextMenu(); MenuItem mnuOwnerDraw = new MenuItem(); mnuOwnerDraw.Text = "This text WILL NOT appear on a ComboBox!"; mnuOwnerDraw.OwnerDraw = true; mnuOwnerDraw.DrawItem +=new DrawItemEventHandler(mnuOwnerDraw_DrawItem); mnuOwnerDraw.MeasureItem +=new MeasureItemEventHandler(mnuOwnerDraw_MeasureItem); base.ContextMenu.MenuItems.Add(0, mnuOwnerDraw); MenuItem mnuNormalDraw = new MenuItem(); mnuNormalDraw.Text = "This text WILL appear!"; mnuNormalDraw.OwnerDraw = false; base.ContextMenu.MenuItems.Add(0, mnuNormalDraw); } private void mnuOwnerDraw_DrawItem(object sender, DrawItemEventArgs e) { MenuItem menu = sender as MenuItem; e.Graphics.DrawString( menu.Text, this.Font, SystemBrushes.ControlText, e.Bounds.X + 15, e.Bounds.Y ); } private void mnuOwnerDraw_MeasureItem(object sender, MeasureItemEventArgs e) { MenuItem menu = sender as MenuItem; string text = menu.Text; e.ItemWidth = (int)(e.Graphics.MeasureString(text, this.Font).Width) + 3; e.ItemHeight = (int)(e.Graphics.MeasureString(text, this.Font).Height) + 2; } } public class TextBoxTest: TextBox { public TextBoxTest() { base.ContextMenu = new ContextMenu(); MenuItem mnuOwnerDraw = new MenuItem(); mnuOwnerDraw.Text = "This text WILL appear on a Textbox!"; mnuOwnerDraw.OwnerDraw = true; mnuOwnerDraw.DrawItem +=new DrawItemEventHandler(mnuOwnerDraw_DrawItem); mnuOwnerDraw.MeasureItem +=new MeasureItemEventHandler(mnuOwnerDraw_MeasureItem); base.ContextMenu.MenuItems.Add(0, mnuOwnerDraw); MenuItem mnuNormalDraw = new MenuItem(); mnuNormalDraw.Text = "This text WILL appear!"; mnuNormalDraw.OwnerDraw = false; base.ContextMenu.MenuItems.Add(0, mnuNormalDraw); } private void mnuOwnerDraw_DrawItem(object sender, DrawItemEventArgs e) { MenuItem menu = sender as MenuItem; e.Graphics.DrawString( menu.Text, this.Font, SystemBrushes.ControlText, e.Bounds.X + 15, e.Bounds.Y ); } private void mnuOwnerDraw_MeasureItem(object sender, MeasureItemEventArgs e) { MenuItem menu = sender as MenuItem; string text = menu.Text; e.ItemWidth = (int)(e.Graphics.MeasureString(text, this.Font).Width) + 3; e.ItemHeight = (int)(e.Graphics.MeasureString(text, this.Font).Height) + 2; } } } Tag: Delegate by Book Tag: 85991
  - 18
    - Dangling process, when calling ShowDialog twice from Main hi, i've used jason clarks recommendations for handling unhandled exceptions in my winforms app (http://msdn.microsoft.com/msdnmag/issues/04/06/NET/default.aspx). if an unhandled exception happens, i open up an 'Error-Logger' form, which sends the exception to a web service. here is the relevant code: [STAThread] public static void Main() { try { SubMain(); } catch (Exception e) { HandleUnhandledException(e); } } public static void SubMain() { AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(OnUnhandledException); // CLR Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(OnGuiUnhandedException); // Windows Forms Application.Run(new MainForm()); } public static void HandleUnhandledException(Object o) { if(o == null) { MessageBox.Show("An unknown error has occurred", "Error"); return; } Exception ex = o as Exception; if (ex != null) new ErrorLogger(ex).ShowDialog(); } this approach works very well. the problem of a dangling process occurs if the user closes the ErrorLogger form before it has finished reporting the error. A ThreadAbortException happens (which i catch and ignore) in ErrorLogger, and the error logger form closes. if i then close the mainform, the process is left dangling in task manager with no windows open. this only happens if the user kills the errorlogger form. the errorLogger form calls the web service on a worker thread, but i am careful to Abort this thread in Dispose() and Form.Close() and even when the ThreadAbortException happens. is there any way for me to work around this? maybe the application is creating two UI threads because ShowDialog is called twice, and only one of those threads gets properly terminated when the application is closed? thanks for any help tim Tag: Delegate by Book Tag: 85989
  - 19
    - detecting instances of my App I want to allow running only one instance of my Application. How can I detect that a previous instance of my WinForm App is running in order to stop the second instance? -- thks Tag: Delegate by Book Tag: 85985
  - 20
    - Using The NativeWindow Class To Draw A GDI Type Circle On Top Of A DataGrid Possibly In The Override OnPaint I have a requirement to put a GDI style circle or rectangle border around the selected row of a datagrid/ It will overlap into the row above and below the selected row. Doing this in a the OnPaint of a subclassed DataGridTextBoxColum dos not seem like a practical way to do it. I have subclassed a DataGrid and overridden the OnPaint as such: protected override void OnPaint(PaintEventArgs pe) { base.OnPaint(pe); // Create pen. Pen blackPen = new Pen(Color.Green, 2); // Create location and size of rectangle. float x = 15.0F; float y = 53.0F; float width = 500.0F; float height = 20.0F; // Draw rectangle to screen. pe.Graphics.DrawRectangle(blackPen, x, y, width, height); } It works but has refresh problems. Last week Bob Powell [MVP] suggested that I use a NativeWindow class to solve this problem. I've just had the time to get back to this and not being a former C++ person, etc., etc., etc. maybe someone can help with this. The MSDN help screen for the NativeWindow class is this link: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformsnativewindowclasstopic.asp It has an example and in the subclassed NativeWindow constructor it creates a button: public MyNativeWindow(Form parent) { ..see help example } Can someone advise me on where my code above that paints the Rectangle should go in this NativeWindow example? Tag: Delegate by Book Tag: 85977
  - 21
    - Creating DesignerVerbs for a Reflection.Emit-ed class for use in a PropertyGrid Hi, I've hit a bit of a brick wall in my use of the PropertyGrid control. I am writing a Windows Forms application that does the following: - dynamically create a class using Reflection.Emit - the class simply holds a number of properties ("Name", "Description", etc). - pass the class to a PropertyGrid control which then renders the properties for the user to edit. This is all working fine, and I have even added my own Category and Description attributes to the properties which are showing up successfully in the PropertyGrid. My problem is that I would also like to add a couple of DesignerVerbs to the class, so that I can offer "Add Property" and "Remove Property" functions in the PropertyGrid. I have set the CommandsVisibleIfAvailable flag on my PropertyGrid, and attempted to set the Designer attribute on my dynamically-created class. The Designer attribute points to a custom ComponentDesigner class, in which I have defined the DesignerVerbs. However, the verbs are not being shown in the PropertyGrid. I may have a lead in that the Attributes property of my TypeBuilder class still says "NotPublic" after I SetCustomAttribute. But does that mean the contents of the Attributes collection are not public, or that my class' only attribute is "NotPublic"? Any ideas on something I might have missed? Below is some example code, in the hope that it jogs someone's memory! I'd be happy to post anything else that may be relevant. Cheers Lee ********************************************** *** snippet from DynamicCmSchemaCreator.cs *** *** creates the DesignerAttribute using my *** *** custom ComponentDesigner class *** TypeBuilder typeBuilder = moduleBuilder.DefineType ( DynamicType, TypeAttributes.Class, typeof(Component) ); // Apply the Designer attribute, supplying our own ComponentDesign class CustomAttributeBuilder customAttributeBuilder = new CustomAttributeBuilder ( typeof(DesignerAttribute).GetConstructor(new Type[] { typeof(Type) }), new object[] { typeof(DynamicCmSchemaComponentDesigner) } ); typeBuilder.SetCustomAttribute(customAttributeBuilder); ******************************************* *** DynamicCmSchemaComponentDesigner.cs *** *** the componentdesigner I attach to *** *** the dynamic class *** public class DynamicCmSchemaComponentDesigner : ComponentDesigner { private const string AddPropertyVerb = "Add Property"; private const string RemovePropertyVerb = "Remove Property"; private DesignerVerbCollection verbs; private void OnAddPropertyVerb(object sender, EventArgs e) { System.Diagnostics.Debug.WriteLine("Processing Add Property"); } private void OnRemovePropertyVerb(object sender, EventArgs e) { System.Diagnostics.Debug.WriteLine("Processing Remove Property"); } public override DesignerVerbCollection Verbs { get { if (verbs == null) { verbs = new DesignerVerbCollection(); verbs.Add(new DesignerVerb(AddPropertyVerb, new EventHandler(OnAddPropertyVerb))); verbs.Add(new DesignerVerb(RemovePropertyVerb, new EventHandler(OnRemovePropertyVerb))); } return verbs; } } } **************************************** *** snippet from MainForm.cs *** *** creates the dynamic class and *** *** passes it to the propertygrid *** object dynamicCmSchema = DynamicCmSchemaCreator.CreateDynamicCmSchema ( node.CmSchema.Properties ); this.propertyGrid.SelectedObject = dynamicCmSchema; ******************************************* Tag: Delegate by Book Tag: 85969
  - 22
    - Does MS will provide a RCP like Eclipse RCP or Macromedia Flex? The smart client offered by MS is more like a concept and the features is more separately. I think the client application vender need a clien side framework like Eclipse RCP. Does MS or any others provide one for .NET? -- Niciyou Beijing, China Tag: Delegate by Book Tag: 85968
  - 23
    - How to get the selected node of TreeView when context menu popup? When user right click the tree node, a context menu popup. But I can not get the node clicked calling TreeView.SelectedNode property correctly because the default selection behavor of TreeView is left click. How can I get the correct tree node when context menu popup? Thanks. Tag: Delegate by Book Tag: 85963
  - 24
    - Architectural Guide to Winforms Development? I'm primarily a class library developer, but I've written a few small tools in my day using forms (VB6/Java/Winforms) and my libraries have been used in larger forms apps. The thing is, I've never seen a well architected forms app in my 12-year career and I'm wondering if there is a book or some resource that deals specifically with designing a forms app. In the class library/component world, it's relatively easy to implement design patterns and graceful object-oriented designs, I suppose because we don't have to keep so many balls in the air and visually interact with users. Are there common patterns and designs for forms development? I understand and have implemented simple Model-View-Controller and Model-View designs, but I'd like to know of other designs (are there any?) and how compatible they are with WinForms development. I would love to have a resource that goes deep into some of the common issues with forms like forms management (ie organizaing, caching, reusing), use of dialogs, data encapsulation, messaging between GUI objects, and so on. I'm quite comfortable with the mechanics of WinForms, so I'm looking for something more design-oriented. Thanks for any pointers. Tag: Delegate by Book Tag: 85962
  - 25
    - Property grid with listview I'm using a listview as my drop down in my property grid editor and everything for the most part works fine. However, if I don't have the properties view pinned and I click on another property while the drop down is open, it seems to give me an error of Invalid Property value. The details say Object type cannot be converted to target type. This does not happen if I have the properties window pinned down though. I don't understand why this is happening and how I can stop it. Lance Johnson Tag: Delegate by Book Tag: 85955
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  - 1
    - Timers and threading Hi, I am writing a program that handles authentication, and based on the user's permission level, can do certain things in the program. However, I want to have a global 10 minute time out in case a user is idle for that amount of time. To do this, I am using a timer from System.Timers. At the end of the 10 minute timeout, I want the timer to call methods within the program to limit access to certain functionality. However, the problem is that the timer is working on a different thread, and so calls to these methods will also be on this thread, which is not the owner thread of the controls I am trying to alter, and so I'm getting an exception. How can I tell the owner thread to manipulate the controls? Thanks! Tag: Delegate by Book Tag: 85952
  - 2
    - dyn buttons I'd like to add buttons dyn to a form, i can create new buttons, new .name & .text properties, but i can't figure out the eventhandler example I want to create a grid of buttons based on the itemno from a database, then clik on the button & have it add that itemno to a list box, or database... Thanks!! -- Scott Kramer CDS Technologies, Inc. www.team501.com Tag: Delegate by Book Tag: 85951
  - 3
    - User controls: Propagating new changes to placed controls Hello, I've taken a button component and extended it's functionality by adding a couple small methods and properties. This control is contained within my project tree and has been used on various locations of my form. Now, I want to add another property to the control. In doing so I had hoped that this change would have been propagated to the older controls, however, it's only showing up in a control that's placed on the form for the first time. How do I make the change propagate to the other controls without deleting and replacing them? Thanks, Chris Tag: Delegate by Book Tag: 85948
  - 4
    - optimize .net app with a lot of graphic background images Hello, I have a winform that looks beautiful. All the panels have bacground images. I even have rollover buttons for the main navigation. My problem is that it loads slower than a "plain" winform app. Also when minimizing the form and switching back to my application it has "blank sections" that occur for a few moments. Right now my application is just a shell, there is no "programming code". All the code has been done in the forms designer except for the rollovers. What can I do to 1) optimize the performance overall of the application 2) make repaints quicker 3) generally run faster Right now the only way I know to "optimize" the application is (a) write efficient code and (b)Setting the "Configuration" to "Release" and (c) setting "Optimize Code" to "true". Thanks, Tom Tag: Delegate by Book Tag: 85945
  - 5
    - BUG: SizeGripStyle does not support XP visual style (themes) This is probably question to Microsoft WinForms support. My C# application has XP visual styles enabled through Application.EnableVisualStyles() call and everything is fine except for (at least) grip of my Form1 app-wizard created form - it still old style grip. However, when I show OpenFileDialog from my application - this system dialog has correct (XP) style. Boris Tag: Delegate by Book Tag: 85944
  - 6
    - UserControl Text property I have a control that derives from UserControl. In addition, I have overriden the Text property and put the attributes on it so it shows up int the designer. However, it will not save the value no matter what I do. I've applied every attribute I can think of. Any help in this matter is appreciated. Lance Johnson Tag: Delegate by Book Tag: 85941
  - 7
    - Toolbar on TerminalServer runninf with 256 colors Hello all together. I have little bit trouble with a Toolbar which i want to use in vb.net. I have placed in Toolbar on my form and added some buttons to it. In addition i have also placed an imagelist with images that are all gifs optimized for 256 color (to be more precisely: i have optimized them so that they fit to the windows-system-color-palette using 256 colors). than i assigned these images to the buttons on my toolbar. So far so good. everything looks as expected in the designer. But when i run the application in a terminal-server-environment which uses 256 colors the images don't look the same as in a normal-environment. they look if they have only 16 colors or somethink like that. So i put one of my images stored in the imagelist on a normal button situated on the form. When i re-run the application in a terminal-server-environment the normal button looks like expected where else the toolbar buttons looks ugly. Can someone please point me to the right direction to get manged it. Or perhaps does somebody has some sample code? Thanks in advance, Rainer Arnken Tag: Delegate by Book Tag: 85939
  - 8
    - FIFO in a richTextBox I have a richTextBox that is receiving lots of data over a serial port. The problem is that the display of the text gets slower and slower as more and more text is added (using .AppendText). Is there a way to limit the text box to some fixed number of lines (or characters) of text such that the first text in would automatically get dropped from the text box when the limit is reached? I've tried using SelectionStart combined with SelectionLength to select and cut the first line of text when the limit is reached, but that gets the vertical scroll bar bouncing up and down as the code bounces between adding new text and deleting old text. This results in even worse performance of the text box. Any thoughts or suggestions? Thanks, Ron Tag: Delegate by Book Tag: 85937
  - 9
    - 401 error when trying to read my app config (app hosted on webserv I have a windows forms app that I am launching with a url. I worked through the trust issues and it is working well except for one thing. When I try to use the ConfigurationSettings.AppSettings class to read a value from my application config file it fails. The virtual dir is setup for integrated auth only. What happens (according to the iis logs) is the attempt to read the file gets a 401 response, then gives up. Normally this would be followed by one more 401 then a 200 once the client finally sends the correct credentials. This is what shows up for other files such as the .exe and so forth. I assume the difference is that IEexec is handling the authentication challenges for loading the .exe, but what do I need to do so the framework will handle the authentication challenge while using the appsettings method ? BTW if I allow anonymous on the virtual this works just fine. Ideas ? Tim Tag: Delegate by Book Tag: 85931
  - 10
    - asp.net i want to help for how to code this if i entering the datas in first form then that display in second form for what ever i entered in first form(confirmation ) i know about first form insert datas but i dont know how to display in second form can i help you please consider this thank u sutha -- Message posted via http://www.dotnetmonster.com Tag: Delegate by Book Tag: 85929
  - 11
    - form hide (or visible = false) Hi, In the form's Load event handler I'm trying to hide the form, but still the form is visible although the Visible property is set to false. Only if the ShowInTaskBar property is set to false too, it is not visible. Why? Isn't there a way to hide a form from its Load event handler but to display it still in the task bar? Here is the code: // handler for the Load event private void FrmLifetimeDemo_Load(object sender, System.EventArgs e) { this.Visible = false; this.ShowInTaskbar = false; } -- Ohad Young Medical Informatics Research Center Ben Gurion University Information System Eng Office Phone: 972-8-6477160 Cellular Phone: 972-54-518301 E-Mail: ohadyn@bgumail.bgu.ac.il Tag: Delegate by Book Tag: 85928
  - 12
    - PrinterSettings.PaperSources Does anyone know how to switch trays(paper source) when printing a multi-page document? Here is some code I have tried, but I can never get the printer to grab from another tray during the print of a document. If I seperate the two calls into Page 1 and Pages 2-4, then the printer will grab from the appropriate tray. To do this, requires I call the objPD.Print two times. This seperates them in the print buffer, which we are trying to avoid doing. Friend WithEvents objPD As System.Drawing.Printing.PrintDocument Private Sub PrintMe() Dim ps As New System.Drawing.Printing.PrinterSettings ps.MaximumPage = 4 ps.MinimumPage = 1 ps.PrintRange = Printing.PrintRange.SomePages ps.FromPage = 1 ps.ToPage = 4 ps.PrinterName = printerName 'Printer name was captured eariler by user objPD.PrinterSettings = ps m_currentPrintingPage = 1 m_lastPrintingPage = 4 objPD.DefaultPageSettings.PaperSource = objPD.PrinterSettings.PaperSources(1) 'goldenrod colored sheet objPD.Print() End Sub 'Then in the printpage event: Private Sub objPD_PrintPage(ByVal sender As System.Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles objPD.PrintPage e.HasMorePages = False If m_currentPrintingPage <= m_lastPrintingPage Then If m_currentPrintingPage = 1 Then 'first page gets a goldenrod sheet objPD.DefaultPageSettings.PaperSource = objPD.PrinterSettings.PaperSources(1) 'goldenrod sheet e.PageSettings.PaperSource = objPD.PrinterSettings.PaperSources(1) 'goldenrod sheet 'neither of the two above lines work, either together or seperate Else 'all other sheets in this document get plain white paper objPD.DefaultPageSettings.PaperSource = objPD.PrinterSettings.PaperSources(5) 'White sheet e.PageSettings.PaperSource = objPD.PrinterSettings.PaperSources(5) 'White sheet 'neither of the two above lines work, either together or seperate End If ReportDrawPageNET(e.Graphics) 'create the page that goes to the printer m_currentPrintingPage += 1 If m_currentPrintingPage <= m_lastPrintingPage Then e.HasMorePages = True Else e.HasMorePages = False End If e.Graphics.Dispose() End If End Sub Thanks! -- Todd Acheson Tag: Delegate by Book Tag: 85926
  - 13
    - FolderBrowserDialog.FolderBrowserDialog does not work on Windows 2 I found out this problem very long time ago. I set FolderBrowserDialog to false but the New Folder button still shows on Windows 2000. At that time, I thought it may be related to Windows 2000 itself and SP3/SP4 would eventually fix it. But at the beta 2 release of .NET FX 2.0, the problem still exists on Windows 2000/SP4. Note that this problem does not exist on Windows XP/2003 (I do not have the chance to test it on Windows 98). Will Microsoft fix this *small* problem? Tag: Delegate by Book Tag: 85920
  - 14
    - Splash screen? Hi all, I've created a splash screen for an MDI application and moved the main application's entry function in the splash screen's class. Inside the Main(), I run the following: [STAThread] static void Main () { Application.Run (new FormSplash ()); } In the Load event of FormSplash, I start a timer that increases the form's Opacity value and updates a progress bar and a label. Finally, I start another thread to run the MDI form and close the splashscreen: private void FormSplash_Load (object sender, System.EventArgs e) { timer_Refresh.Start(); ... ... // connect to db, initialize some static objects etc... ... // Run main MDI application Thread thread = new Thread (new ThreadStart (FormMain.Start)); thread.IsBackground = false; thread.Start(); this.Close() } The problem is that even if timer is enabled, it doesn't get into the Tick event's implementation, until the splash form is being closed with Close(). Any suggestions? Is there a simpler way to have a splash screen created and shown before the main application's form? Thanks in advance, Pascal Tag: Delegate by Book Tag: 85917
  - 15
    - Custom OpenFileDialog Hi, It seems this one comes up all the time but I could not find anything. I need a customized FileOpenDialog. As I could not find any I decided to write my own. I have the following questions: 1. How do I find information about logical devices? There are functions returning logical drives' names, but no info what they are (floppy, CD-ROM, hard drive) 2. How do I browse the network (if there is one)? Thank you Tag: Delegate by Book Tag: 85911
  - 16
    - Starting different forms in a project If I have a WinForms project - what's the best strategy for opening different forms from different shortcut icons? Basically I want to lump a few different (but related) apps into the one assembly, and have a number of icons in the start menu. Is there a way to go about this (like passing parameters to Main or something)??? Many thanks. ==== Phil Tag: Delegate by Book Tag: 85904
  - 17
    - [ANN] March 29, 2005, "ADO.NET with Visual Basic .NET" chat Every application uses data. Join members of the Visual Studio and SQL teams (Steve Lasker, Eric Gruber, Kris Langohr, Steve Stein, Riaz Khan, Eddie Goziker, and John Chen) for a discussion of the best approaches for working with data in your applications. Date: March 29, 2005 1:00 - 2:00 P.M. Pacific time 4:00 - 5:00 P.M. Eastern time 21:00 - 22:00 GMT (For a list of the start time in several local time zones, please see http://www.timeanddate.com/worldclock/fixedtime.html?month=11&day=2&hour=13&min=0&sec=0&p1=234) Outlook Reminder: http://msdn.microsoft.com/chats/outlook_reminders/050329_DN_ADONET.ics Location (click the name of the chat to enter the chat room) http://www.microsoft.com/communities/chats/default.mspx#050329_DN_ADONET For more information about Visual Basic .NET, see http://msdn.microsoft.com/vbasic/ To see a list of upcoming chats or set a reminder for this chat, see http://msdn.microsoft.com/chats. For archives of previous chats, see http://msdn.microsoft.com/chats/recent.asp. Thanks! Jason Cooke Visual Basic Team ======== This posting is provided "AS IS" with no warranties, and confers no rights. You assume all risk for your use. (c) 2005 Microsoft Corporation. All rights reserved. Tag: Delegate by Book Tag: 85899
  - 18
    - Passing Information/address form properties - VB.NET I have a basic question about how do you change the information on a Form from another Form, not a dialog. Example: I have a MDIform which is the startup form for the project. I call a child form to put in setup information which is written to the Registry. As a result I need to update the Text (Title) of the MDIForm and a StatusBar Panel(0) which is also on the MDIFORM. In VB6 this was easy. I has tried using classes but can not seem to get it to work. I can pass to a new instance but not to the current instance. Help Leo Tag: Delegate by Book Tag: 85898
  - 19
    - Accessing a String Resource It seems like it should be so simple but I'm having trouble with the baseic C# code for accessing a String resource. I need to be able to do this both from a WindowsForms application and a Console application. When I do... ResourceManager RM = new ResourceManager("ProjectName", Assembly.GetExecutingAssembly()); m_ConnString = RM.GetString("ConnectionString"); I get a "MissingManifestResourece Exception" on the GetString() line. But I'm not sure if this is because "ConnectionString" can't be found within the standard Resources.resx file included when one creates a Application Project in VS or if it's because I don't know exactly how to provide the parameters for the ResourceManager constructor. Help? Alex Tag: Delegate by Book Tag: 85897
  - 20
    - Shutdown multithreaded app or Thread.Abort Hello, I have a multithreaded app that did not have problem closing down on XP computer. But on Windows server 2003, one thread is not stopping and I can not delete the process from task manager either. This is Windows Form app. I am using Thread.Abort to cancel threads. It is hard to catch wich thread hangs. How can I debug better? any tools that I can use? Is Thread.Abort bad? Thanks. Tag: Delegate by Book Tag: 85895
  - 21
    - Form.Update in Windows Xp Hello everyone: I'm developing an application that executes a long algorithm and I want to show a progress bar, and every time the progress bar is updated, I also update the main window, so the window refreshes the invalidated areas. I was developing in win2k and everything works fine, but now Im using WinXp, and the form.Update () is ignoring my calls, so the application looks like a big white box and the user can not know where the progress bar is. Is that a bug? (Im afraid it is a feature..) Is there any way to do that without having to create threads or some things like that?? Tag: Delegate by Book Tag: 85894
  - 22
    - Rich Client Framework (like MFC?) Where is MFC for .NET? I need something ~similar~ for .NET. Please read on... We are embarking on a project for which we need to build a pluggable rich client framework. We have 15 applications which we are going to integrate into a singe common desktop, sort of like the dashboard model of old. We need to have a shell which will act as the host for a bunch of application "widgets". The shelll needs to support things like common UI realizations, shared state (or context) and implments the MVC or PAC (preferred) patterns. We had a bakeoff with Eclipse/ICWT the Java based framework and won - Doh!. Our plan at the time was to use a new MS Block which supported exactly these features, but it has been tied to Whidbey and therefore is not an option for our Oct release. Of course to write this from scratch would also put an Oct release at risk. Anyone know of a third party product which comes close? I already checked out Ghengis and it's the closest thing so far, but is not nearly robust enough. Thanks, curt Tag: Delegate by Book Tag: 85890
  - 23
    - Reflection and Menu Merging in MDIs We have an MDI application that looks for forms in which a common interface has been implemented. We can instantiate the forms and display them as children of the mdi and use the functionality on them. The problem is that the menus don't show up. They don't even show up on the form itself, much less merge with the mdiparent menus We have changed the modifiers on the menu and on each item in the menu to public so they can be seen outside the assembly. We have tried not making the form an mdichild and using it as a stand-alone application (still instantiated by the mdi, although not as a child). The child form does appear in the 'windows' list as a child of the mdi. Is there any way to make available to the mdi, the menu on a child form instantiated through reflection? Tag: Delegate by Book Tag: 85886
  - 24
    - Regional Settings Hi! How can set Regional settings in rum-time mode? For example How can set decimal separator to "." in VB.NET? -- -- Cumprimentos, David de Passos -------------------------------------------------------------- RCSOFT, Lda. E-Mail: passos@rcsoft.pt Móvel: +351 966931639 Telefone: +351 239708708 Fax: +351 239708701 Tel. Directo: +351 239708705 ext. 401 Tag: Delegate by Book Tag: 85885
  - 25
    - Skin enabled apps Hi, I'm looking for some documentation about developing skin enabled apps (let's say desktop WinForms apps) and all I can find is about Mobile Apps. Are there any design patterns (or anything else) that I should follow to enable skins in my app or should I build it from scratch? Thanks a lot, Regards, Victor Tag: Delegate by Book Tag: 85882

Does anyone know about a good book that teaches Delegates or other types type
threading?

Re: Delegate by Book by Matt

Matt
Thu Mar 31 12:15:46 CST 2005

Hello Arne,

Chris Sells has a great story about delegates [1] written in the form of
a bedtime story...

[1] http://www.sellsbrothers.com/writing/default.aspx?content=delegates.htm

--
Matt Berther
http://www.mattberther.com

> Does anyone know about a good book that teaches Delegates or other
> types type threading?
>

Top

Re: Delegate by Book by Arne

Arne
Thu Mar 31 14:13:03 CST 2005

Matt,

Nice story, but I am really looking for a little bit more.

Arne.

"Matt Berther" wrote:

> Hello Arne,
>
> Chris Sells has a great story about delegates [1] written in the form of
> a bedtime story...
>
> [1] http://www.sellsbrothers.com/writing/default.aspx?content=delegates.htm
>
> --
> Matt Berther
> http://www.mattberther.com
>
> > Does anyone know about a good book that teaches Delegates or other
> > types type threading?
> >
>
>
>

Top