Request for book recommendations

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  - 1
    - Selecting field from DataGrid when using a Context Menu I created a context menu and bound it to the data grid this.dataGrid1.ContextMenu = this.contextMenu1; This works fine when I right click. What I am trying to do is to capture the data that is in the specific DataGrid box that the context menu was created on. I am then going to pass it to another winform. The functionality that I am looking for is if you left click on some code in Visual Studio and then right click and select copy. Do a paste somewere else . Whatever line you were on was selected for the copy. Any thoughts would be appreciated. Dave DavidElliott@BellSouth.net Tag: Request for book recommendations Tag: 54706
  - 2
    - Drag/Drop question I have an MDI app where I'm trying to drag things from one MDI child to another. The problem is that the drop target never gets any event notifications because it never has the focus. What I'd like to do is drag over this item, and then when the mouse moves over it, give it the focus. But I can't figure out any way to have the MDI parent handle MouseMove events. Is there a better way? Thanks Tag: Request for book recommendations Tag: 54705
  - 3
    - Thread Question -=> System.NullReferenceException after exiting main() I have created an application that will dynamically load other DLLs (plugins). The new plugin is a winform with an embedded IE Browser. I am wanting to have the form to run in its own thread. This would allow for other plugins and the main application to be free to do other work. I have written a little TestDriver for the plugin and am having some difficulty. If I don't use threads everything works just fine. If I do use threads, upon finishing the thread.Join() loop, I step to the end of main and I receive the same exception 3 times. Any help would be appreciated. Dave DavidElliott@Bellsouth.net ============================================================= An unhandled exception of type 'System.NullReferenceException' occurred in system.windows.forms.dll Additional information: Object reference not set to an instance of an object. ============================================================================== [STAThread] static void Main() { IPlugIn plugin = null; Assembly assembly = null; Object obj = null; String s = null; Thread thr = null; try { assembly = Assembly.LoadFrom("..\\..\\..\\bin\\Debug\\AJB.dll"); Type[] types = assembly.GetExportedTypes( ); foreach (Type t in types ) { Type interfaceT = t.GetInterface( "IPlugIn" ); if( null != interfaceT ) { plugin = (IPlugIn)assembly.CreateInstance(t.ToString()); obj = assembly.CreateInstance(t.FullName); s = obj.GetType().ToString(); plugin.PluginID = 74; thr = new Thread( new ThreadStart(plugin.Execute) ); thr.ApartmentState = ApartmentState.STA; thr.IsBackground = false; thr.Start(); //plugin.Execute(); } } } catch (Exception e) { s = Application.ExecutablePath.ToString() + "\n" + e.ToString() + e.Message + e.StackTrace; MessageBox.Show(s, "ExecutePlugin() Error"); } thr.Join(); } Tag: Request for book recommendations Tag: 54703
  - 4
    - Unable to delete controls. Hi, For some reason I appear to have lost the ability to delete controls in the designer (VS.net 2003) When I right click on any control all the options are blanked out apart from 'View Code' at the top. The Del key doesn't work either. I can still drag controls around the form but deleting them is impossible. I don't really want to go hack out all the definitions from the code... Any ideas? Thanks, Russ Tag: Request for book recommendations Tag: 54702
  - 5
    - Form, CancelButton, Escape, prevent Form close Hi, I have a form that has a Close button. I set this close button to be the CancelButton for my form. When the close button is pressed, if there have been any changes made to the form, I popup a MessageBox asking the user if they wish to save their changes, using the YesNoCancel message buttons. If the user hits cancel obviously I do not want to close the form. If the user hits close I call Close on the form. This works fine for when the user clicks the close button, but when they hit escape the form closes whether they hit cancel and I call Close or not. How can I get around this? I've pasted code sample below. Thanks, Adam private void bClose_Click(object sender, System.EventArgs e) { FormClose(); } protected virtual void FormClose() { bool close = true; if (myDataPanel.HasChanges()) { DialogResult dr = UIHelperController.Instance.ShowQuestionMessageBox(this,"Changes Made","Changes have been made to this panel. Would you like to save these changes before closing?",MessageBoxButtons.YesNoCancel); switch (dr) { case DialogResult.Yes: close = myDataPanel.Write(); break; case DialogResult.No: close = true; break; case DialogResult.Cancel: close = false; break; } } if (close) { Close(); } } Tag: Request for book recommendations Tag: 54701
  - 6
    - System.Threading.ThreadStateException I have a form with a grid. When a user selects some text in the Grid and presses Ctrl-C to copy the text, .NET throws an Exception with the description: "The current thread must set to Single Thread Apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThreadAttribute marked on it." However, I already have System::Threading::Thread::CurrentThread->ApartmentState = System::Threading::ApartmentState::STA; in my _tWinMain. Thanks for any suggestions, Bumbrlik Tag: Request for book recommendations Tag: 54700
  - 7
    - Printer Settings Dialog?? Is there a way to directly access the printer settings dialog which is normally available by clicking the "Properties..." button on the PrintDialog? Tag: Request for book recommendations Tag: 54698
  - 8
    - Is there a simple way to change the DateTimePicker style. It looks sloppy. I want to use the DateTimePicker, so the user can pick the date from the calendar. Is there a way to choose a different calendar style? I see that I can change some colors, but what I do not like most is the red kind-of circle that circles the current date. The control looks sloppy and non-professional. Is there a simple way to clean it up? Thanks... Tag: Request for book recommendations Tag: 54697
  - 9
    - How-to create user control replacing main application form Hello all, I'm wading my way into .net by writing some custom controls. I would like to provide a parent class to these controls to give them easy access to common information. Initially tried this as a panel, but find that I can't drop non-visual components onto panels (they fall through to the main form). So now I am wondering is it possible to override the main application form with a user-authored form? I tried to do this by inheriting from System.Windows.Forms.Form, but when I instantiate such a control in the IDE, it actually appears to spawn a new thread consisting of an independent windows form which can't be accessed using the normal designer interface. Unrelated question - anyone know of a good online reference on Attributes? Thanks, Markus Tag: Request for book recommendations Tag: 54692
  - 10
    - Select row in datagrid I would like to find a row in datagrid with criteria and show the part of datagrid with the row selected Thanks for help Tag: Request for book recommendations Tag: 54691
  - 11
    - Simple problem with the AxWebBrowser control Hello, I am using a AxWebBrowser control in a VB.net windows form. In the form, I also have a TextBox where the user enters the URL he would like to navigate to. I want the TextBox to change it's display (to reflect the new page address) when the user clicks on an hyperlink on the web page (like in Internet Explorer). I have been looking at the events and methods of the AxWebBrowser object, and I can't find it! Any help on this would be very appreciated. thanks, Ross Tag: Request for book recommendations Tag: 54690
  - 12
    - Using Control.Invoke I want to programatically invoke a KeyDown event to a control that has the focus. Maybe you guys know a better way to do this anyway. In my MainMenu I have an Edit sub-menu that has Copy and Paste items. Each of these menu items I setup to use the Shortcut keys Ctrl+C and Ctrl+V. However, I want the Form window that is handling the main menu messages to be stupid about it and just notify the ActiveControl of a KeyDown event to let the controls handle copying to the Clipboard themselves. Going with this scenario how, in C#, do I invoke a KeyDown event to another control programatically? Or is there a better way to notify the ActiveControl? I've tried the following, but I get a compiler error. ActiveControl.Invoke( KeyDown, this, new KeyEventArgs (Keys.Control|Keys.C)); Thanks for your help, Aaron Tag: Request for book recommendations Tag: 54686
  - 13
    - Child Form Enter Event Fires Twice Can someone please tell me why a child form event fires twice? I've got an MDI windows app (C#) that has several child forms that a user can select via an Infragistics tab strip. Axe Tag: Request for book recommendations Tag: 54679
  - 14
    - Master-Detail DataGrids / WEB Services I have a form with 2 grids that participate in a master- detail relationship. I have a web service that supplies the dataset which populates the grids. The following code works great to load the data into the grids: Private Sub LoadGrids() 'instantiate the web services dim oWebService as new uwEngine.uwEngineServices 'call the GetListData service uwData = oWebService.GetListData() 'bind to the dgLists datagrid dgLists.DataSource = uwData dgLists.DataMember = "UW_LISTS" 'bind to the dgListValues datagrid dgListValues.DataSource = uwData dgListValues.DataMember="UW_LISTS.UW_LISTSUW_LISTS_DATA" End Sub Now I need the ability to trap the datatable events (columnChanging, rowChanging, etc). How do I create code to handle the events being that I am not dimming the datatables in my client code ? (the datatables are coming from the Web Service) thanks for your time Tag: Request for book recommendations Tag: 54667
  - 15
    - how to check if a form is already open Hi, How do I check that a form is already open? I think I have to check how many instances of that form class are initiated, but how do I do that? Thanks, Rainer. Tag: Request for book recommendations Tag: 54665
  - 16
    - .NET thin client I want to develop a "thin client" using C#. The idea is that most possible information to dynamically create and show forms comes from a server. Dynamic data to be shown on these forms should also come from a server. The forms must contain many windows controls (user controls) which are not statically known by the client assembly (preferably). I think that using aspx is not a good solution due to the poor user interface without complex scripts to show the controls. I want to use web services both for loading info to create the forms and for accessing dynamic data to be shown in the forms. Is this at all practical ? (due to bad performance, caching would help), anyone has an idea about architecture, formats etc Tag: Request for book recommendations Tag: 54662
  - 17
    - Shaped Form (TransparencyKey) problem on some installations Hi I have been using the combination of the BackgroundImage and TransparencyKey properties of a form in order to create an interesting splash screen. This is working on some machines but not others (All Windows XP). Is anyone out there aware of any problems regarding shaped forms at any framework release? Thanks in advance Andrew Wiles Tag: Request for book recommendations Tag: 54644
  - 18
    - DataBinding a RadioButton group Hi, I have two RadioButtons in a GroupBox. I want to databind these radiobuttons with a value (if '0', one radiobutton is checked else another) of a column in a DataTable. Iam not able to figure out how to do this. Please someone help me. Regards, Srikanth. Tag: Request for book recommendations Tag: 54641
  - 19
    - DropDownList with toolbar Is it possible to add a DropDownList to the ToolBar? I know there is a DropDownButton but it doesn't display a drop down list. Instead it displays a ContextMenu under a regular button. Tag: Request for book recommendations Tag: 54636
  - 20
    - Winform Memory Usage Hi, I created a fairly large data winforms applications and have deployed it on a terminal server. Every instance of the application, when executed on the terminal server, seems to take about 100 megs of memory. Can someone please give me some suggestions on how to minimize memory usage or share the application on the terminal server between users? Tag: Request for book recommendations Tag: 54634
  - 21
    - CheckBox (help!) This is a multi-part message in MIME format. ------=_NextPart_000_0041_01C365A0.FDA46CD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello all, In Design-Time I created a form with many checkboxes which contained no = "text". It looked something like this: -------------------------------------------------------------------------= ----- mycheckboxes: 0 0 0 0 0 mycheckboxes2: 0 0 0 0 0 -------------------------------------------------------------------------= ----- where "0" is a checkbox. The problem I am having in Run-Time is that I = cannot see the focus on these checkboxes unless there is text on it. Is = there a way I can Override the focus from "text" to the control itself? Yama ------=_NextPart_000_0041_01C365A0.FDA46CD0 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 6.00.2800.1170" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Hello all,</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>In Design-Time I created a form with = many=20 checkboxes which contained no "text".  It looked something like=20 this:</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial=20 size=3D2>----------------------------------------------------------------= --------------</FONT></DIV> <DIV><FONT face=3DArial size=3D2>mycheckboxes:    = 0   =20 0    0    0    = 0</FONT></DIV> <DIV><FONT face=3DArial = size=3D2>mycheckboxes2:  0   =20 0    0    0    = 0</FONT></DIV> <DIV><FONT face=3DArial=20 size=3D2>----------------------------------------------------------------= --------------</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>where "0" is a checkbox. The problem I = am having in=20 Run-Time is that I cannot see the focus on these checkboxes unless there = is text=20 on it. Is there a way I can Override the focus from "text" to the = control=20 itself?</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Yama</FONT></DIV></BODY></HTML> ------=_NextPart_000_0041_01C365A0.FDA46CD0-- Tag: Request for book recommendations Tag: 54628
  - 22
    - Two Forms and One ImageList How to get <Form2> "to see" an ImageList component on <Form1> at DesignTime, so I can choose it from the ImageList Property ComboBox ? Tag: Request for book recommendations Tag: 54626
  - 23
    - Getting Form a DataSet is on in design mode. I want to get the TEXT value of the FORM that contains a DataSet component. Unlike Controls, the Component base class does not have a Parent member or any other property that points to the form containing the component. Am I just missing something? Bill Tag: Request for book recommendations Tag: 54608
  - 24
    - Sending the control back programmatically... Hello, I have about 150 forms and I want to send only the labels 'Send To Back' in the z-order. I tried lbl.SendToBack(); This doesn't seem to help. Did anyone experience the same problem? How did you overcome this? Thanks in advance. Regards. HyperX. Tag: Request for book recommendations Tag: 54606
  - 25
    - Non-responsive I've created a C# window's form application that migrates data. As it migrates data, the program itself is non-responsive. I would like to implement a cancel button to stop the migration mid-stream. Will I have to use threading to split the tasks or is there another way? Thanks in advance, Jim Christiano Tag: Request for book recommendations Tag: 54602
- Next
  - 1
    - Newbie question on object disposal Hi, In my windows application, I am creating multiple forms that are hidden once the user is finished with them. What is the best way to make sure the form are really destroyed as soon as possible (and that their ressource is released). Any help here would be welcome. James Tag: Request for book recommendations Tag: 54600
  - 2
    - Resizing issue Hi, I have a win form in VB.net that I want the user to be only able to resize it's height (not the width!). Is there an obvious way to do this? I have tried to put some values in MinimumSize and MaximumSize but it does not seem to affect the form. I have tried to following, it works but it is not nice visually (it shakes on resize): Private Sub OnFormResize(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Resize If Me.Size.Width > Me.MaximumSize.Width Then Me.Size = New Size(Me.MaximumSize.Width, Me.Size.Height) End If If Me.Size.Width < Me.MinimumSize.Width Then Me.Size = New Size(Me.MinimumSize.Width, Me.Size.Height) End If End Sub any help would be great! thanks, Rina . Tag: Request for book recommendations Tag: 54599
  - 3
    - Memory Error (Memory Low) Please, i've an app created with VB.NET, that must runs 24/7. But i'm getting a memory problem. If i use my app 2 or 3 times i get low memory message. If i don't use the application, just let it maximized, the Win2000 Prof. shows me the same message and my process use 500 MB of memory. What could be wrong? All window i use is destroyed and and all object either. Tks in adv. Fabiano --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.509 / Virus Database: 306 - Release Date: 12/8/2003 Tag: Request for book recommendations Tag: 54594
  - 4
    - Center mouse on a windows form Hi! Does anyone know how to center the mouse on a windows form without leaving managed code? Thanks Konrad Tag: Request for book recommendations Tag: 54581
  - 5
    - Virtual Memory Please, i have an VB.NET application and i'm getting the SO Virtual Memory Low. I purge all memory at the app, but i still get this error. I have a Windows 2000 Professional with 256 MB computer where i run my app. What could be the possible causes? tks in adv. Fabiano --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.509 / Virus Database: 306 - Release Date: 12/8/2003 Tag: Request for book recommendations Tag: 54580
  - 6
    - improper exception thrown (Error creating window handle) this took me several hours to find a bug and fix it. I have a complicated form with several combos. After adding few more, I suddenly started to get famous "Error creating window handle". I started to dig through the net, looking for solutions and meanwhile did a lot of experiments. guess what turned out? it turned out that when an object is added to the Combo, the ToString() method of the object fails and you set the global thread exception delegate to your own (to catch all exceptions) you get "Error creating window handle" instead of "Object or reference not set to an instance of an object". this is to warn anyone who gets "Error creating window handle" and does not know why. maybe there are other scenarios when the exception is thrown instead of another, more proper. Regards, Wiktor Zychla here's the shortest example to reproduce the behavior: using System; using System.Drawing; using System.Windows.Forms; using System.Threading; public class CItem { public string Name; public CItem() { } public override string ToString() { return Name; } } public class C : Form { public ComboBox cb; public C() { cb = new ComboBox(); cb.Size = new Size( 120, 20 ); this.Controls.Add( cb ); for ( int i=0; i<10; i++ ) cb.Items.Add( new CItem() ); } public static void Main() { try { Application.ThreadException += new ThreadExceptionEventHandler( MyExceptionHandler ); Application.Run ( new C() ); } catch ( Exception ex ) { Console.WriteLine( ex.Message ); } } public static void MyExceptionHandler( object sender, ThreadExceptionEventArgs e ) { throw e.Exception; } } Tag: Request for book recommendations Tag: 54571
  - 7
    - Memory leak in Menu Items All the GURUs, Need you help pleeeeaaaaaaaaase. I am having trouble keeping an application working for more than 3-4 hours. It is a business critical app and is suppose to work 24/7. The app runs out of memory because of a memory leak. I did the thorough reasearch and reached to a point where I am stuck. I have created the following sample application extracted from my original application and it reproduces the memory leak. Here is the code, followed by my brief explaination about the code and my findings: /**------------------------------------------------------------**/ using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace Monitor { /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { private System.ComponentModel.Container components = null; private System.Windows.Forms.MenuItem menuItemTransaction; private System.Windows.Forms.MenuItem menuItemLoadTruck; private System.Windows.Forms.MenuItem menuItemFile; private System.Windows.Forms.MenuItem menuItemPrinterSetup; private System.Windows.Forms.MenuItem menuItemLogout; private System.Windows.Forms.MenuItem menuItemUpgrade; private System.Windows.Forms.MenuItem menuItemPhInventory; private System.Windows.Forms.Button button1; private System.Windows.Forms.Button button2; private System.Windows.Forms.Button button3; private System.Windows.Forms.Button button4; private System.Windows.Forms.Button button5; private System.Windows.Forms.Button button6; 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.button1 = new System.Windows.Forms.Button(); this.button2 = new System.Windows.Forms.Button(); this.button3 = new System.Windows.Forms.Button(); this.button4 = new System.Windows.Forms.Button(); this.button5 = new System.Windows.Forms.Button(); this.button6 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(48, 112); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(88, 23); this.button1.TabIndex = 0; this.button1.Text = "AddFile"; this.button1.Click += new System.EventHandler(this.button1_Click); // // button2 // this.button2.Location = new System.Drawing.Point(168, 112); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(88, 23); this.button2.TabIndex = 1; this.button2.Text = "RemoveFile"; this.button2.Click += new System.EventHandler(this.button2_Click); // // button3 // this.button3.Location = new System.Drawing.Point(48, 64); this.button3.Name = "button3"; this.button3.Size = new System.Drawing.Size(88, 23); this.button3.TabIndex = 2; this.button3.Text = "AddMain"; this.button3.Click += new System.EventHandler(this.button3_Click); // // button4 // this.button4.Location = new System.Drawing.Point(168, 64); this.button4.Name = "button4"; this.button4.Size = new System.Drawing.Size(88, 23); this.button4.TabIndex = 3; this.button4.Text = "RemoveMain"; this.button4.Click += new System.EventHandler(this.button4_Click); // // button5 // this.button5.Location = new System.Drawing.Point(48, 160); this.button5.Name = "button5"; this.button5.Size = new System.Drawing.Size(88, 23); this.button5.TabIndex = 4; this.button5.Text = "AddTran"; this.button5.Click += new System.EventHandler(this.button5_Click); // // button6 // this.button6.Location = new System.Drawing.Point(168, 160); this.button6.Name = "button6"; this.button6.Size = new System.Drawing.Size(88, 23); this.button6.TabIndex = 5; this.button6.Text = "RemoveTran"; this.button6.Click += new System.EventHandler(this.button6_Click); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(292, 273); this.Controls.Add(this.button6); this.Controls.Add(this.button5); this.Controls.Add(this.button4); this.Controls.Add(this.button3); this.Controls.Add(this.button2); this.Controls.Add(this.button1); 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 void AddMainMenu() { this.Menu = new System.Windows.Forms.MainMenu(); } private void RemoveMainMenu() { this.Menu.MenuItems.Clear(); this.Menu.Dispose(); this.Menu = null; } private void AddFileMenu() { this.menuItemFile = new System.Windows.Forms.MenuItem(); this.menuItemPrinterSetup = new System.Windows.Forms.MenuItem(); this.menuItemUpgrade = new System.Windows.Forms.MenuItem(); this.menuItemLogout = new System.Windows.Forms.MenuItem(); this.menuItemFile.Index = 0; this.menuItemFile.Text = "&File"; this.menuItemPrinterSetup.Index = 0; this.menuItemPrinterSetup.Text = "&Printer Setup"; this.menuItemUpgrade.Index = 2; this.menuItemUpgrade.Text = "Upgrade"; this.menuItemLogout.Index = 3; this.menuItemLogout.Shortcut = System.Windows.Forms.Shortcut.CtrlL; this.menuItemLogout.Text = "&Logout "; this.menuItemUpgrade.Click += new System.EventHandler(this.menuItemUpgrade_Click); this.menuItemLogout.Click += new System.EventHandler(this.menuItemLogout_Click); this.menuItemFile.MenuItems.Add(this.menuItemPrinterSetup); this.menuItemFile.MenuItems.Add(this.menuItemLogout); this.menuItemFile.MenuItems.Add(this.menuItemUpgrade); this.Menu.MenuItems.Add(this.menuItemFile); } private void RemoveFileMenu() { this.menuItemFile.MenuItems.Clear(); this.menuItemFile.Dispose(); this.menuItemFile = null; this.menuItemUpgrade.Click -= new System.EventHandler(this.menuItemUpgrade_Click); this.menuItemLogout.Click -= new System.EventHandler(this.menuItemLogout_Click); this.menuItemPrinterSetup.Dispose(); this.menuItemPrinterSetup = null; this.menuItemUpgrade.Dispose(); this.menuItemUpgrade = null; this.menuItemLogout.Dispose(); this.menuItemLogout = null; } private void AddTransactionMenu() { this.menuItemTransaction = new System.Windows.Forms.MenuItem(); this.menuItemLoadTruck = new System.Windows.Forms.MenuItem(); this.menuItemPhInventory = new System.Windows.Forms.MenuItem(); this.menuItemTransaction.Index = 1; this.menuItemTransaction.Text = "&Transactions"; this.menuItemLoadTruck.Index = 0; this.menuItemLoadTruck.Shortcut = System.Windows.Forms.Shortcut.F6; this.menuItemLoadTruck.Text = "&Load Truck "; this.menuItemPhInventory.Index = 1; this.menuItemPhInventory.Text = "&Physical Inventory"; this.menuItemLoadTruck.Click += new System.EventHandler(this.menuItemLoadTruck_Click); this.menuItemPhInventory.Click += new System.EventHandler(this.menuItemPhInventory_Click); this.menuItemTransaction.MenuItems.Add(this.menuItemLoadTruck); this.menuItemTransaction.MenuItems.Add(this.menuItemPhInventory); this.Menu.MenuItems.Add(this.menuItemTransaction); } private void RemoveTransactionMenu() { this.menuItemTransaction.MenuItems.Clear(); this.menuItemTransaction.Dispose(); this.menuItemTransaction = null; this.menuItemLoadTruck.Click -= new System.EventHandler(this.menuItemLoadTruck_Click); this.menuItemPhInventory.Click -= new System.EventHandler(this.menuItemPhInventory_Click); this.menuItemLoadTruck.Dispose(); this.menuItemLoadTruck = null; this.menuItemPhInventory.Dispose(); this.menuItemPhInventory = null; } private void menuItemLoadTruck_Click(object sender, System.EventArgs e) { } private void menuItemLogout_Click(object sender, System.EventArgs e) { } private void menuItemUpgrade_Click(object sender, System.EventArgs e) { } private void menuItemPhInventory_Click(object sender, System.EventArgs e) { } private void button1_Click(object sender, System.EventArgs e) { AddFileMenu(); } private void button2_Click(object sender, System.EventArgs e) { RemoveFileMenu(); } private void button3_Click(object sender, System.EventArgs e) { AddMainMenu(); } private void button4_Click(object sender, System.EventArgs e) { RemoveMainMenu(); } private void button5_Click(object sender, System.EventArgs e) { AddTransactionMenu(); } private void button6_Click(object sender, System.EventArgs e) { RemoveTransactionMenu(); } } } /**-----------------------------------------**/ The above sample app. has six buttons to create and destroy all the menu items. If I create the full menu, its structure will be like this: Main Menu - File - Printer Setup - Logout - Upgrade - Transaction - Load Truck - Physical Inventory Now, if you run this sample application, and click in this sequence "AddMain" - "AddFile" - "RemoveFile" - "RemoveMain" all the menu items will not be destroyed and you will have a reference in the memory and it will not be collected by GC. BUT, if you change the sequence to "AddMain" - "AddFile" - "RemoveMain" - "RemoveFile", now it will remove everything from memory and its clean. I don't understand a bit why this behaviour. Now the LAST and the most important: Earlier I added only one submenu and it gets removed completely if I use the second click-sequence, BUT if I add two submenus, there is no way I can get rid of all of them in any way. By doing different permutation and combination the most optimum that I found was the following sequence: "AddMain" - "AddFile" - "AddTransaction" - "RemoveMain" - "RemoveFile" - "RemoveTransaction". Still I have three menu items in the memory and this accumulates everytime I create or destroy the menu. I don't know what to do now. Please see if it makes any sense to you. You can directly write to me at mmisran@ekomcorp.com Thanks in advance -Manoj Misran Tag: Request for book recommendations Tag: 54570
  - 8
    - Exporting to Excel I have a routine that takes a DataTable and exports it to Excel. Works fine and dandy on my machine, which has the Office 11 Beta on it. But it of course doesn't work on anybody else's machine because the have Office 2000 on there machine. How can I make this export function work with Office 2000. I only have the version 11 Type Library on my machine. I looked for another version, but could not find it. Tag: Request for book recommendations Tag: 54569
  - 9
    - ListView control functionality issues Hello, I have a few functionality issues with the ListView control that I'm hoping someone might be able to shed some light on. 1) I need to be able to hide the vertical scroll bar but still allow scrolling programmatically. The Scrollable property hides the vertical scroll bar but also prevents the items in the list from being scrolled programmatically. 2) I want to display the horizontal scroll bar at all times. I can kludge a work-around for this by forcing the combined column widths to always exceed the width of the control, however, this isn't aesthetically pleasing and I'm hoping there's a more elegant way to accomplish this. 3) Set the foreground and background colors for a selected item in a control that doesn't have focus. If I set .HideSelection = False then when the control losses focus it continues to display the highlighted item(s), however, the background color is gray. I need to be able to set the foreground/background colors to a different setting. If anyone can provide any assistance on these items, it will be greatly appreciated. Thanks, John Tag: Request for book recommendations Tag: 54563
  - 10
    - TreeView - Selecting Multiple Nodes Is there a way to allow selection of multiple nodes in a TreeView control? I suppose I might want two ways to select multiple nodes: 1) with a mouse drag, highlighting multiple nodes 2) Using a combination of Ctrl and Shift key presses to select multiple nodes (like in Windows Explorer). For what it's worth, I'm only concerned with selecting multiple sibling nodes (i.e. groups of nodes under a single parent node). I don't see anything in the TreeView API that would appear me to select multiple nodes. Is this possible? If so, any suggestions on how to implement would be much appreciated. Thanks, Tim Rogers Tag: Request for book recommendations Tag: 54562
  - 11
    - Help - Can not change form designs after localization Hi, We have just localized our application (to Chinese). One developer did on his machine. After that, it still runs well on other machines. We can debug it too on other machines. The problem is that any change to the form layouts on the other machines will cause the forms layout screwed up. You can design a form, but when it runs, it does not display what we see in the design mode (with same lang setting). Properties such as 'anchor' are lost when we reopen the form in design mode too. Has any one experienced this before? If yes, what is your solution? I am using VS.net 2003. Thanks James Tag: Request for book recommendations Tag: 54561
  - 12
    - Login Screen I want to create a login screen that controls access to a Win 98 machine. This windows form should not allow the user to access the machine unless he enters one of the correct passwords. Also the application should not be seen in the system tray (after pressing Ctrl+Alt+Del). Can anyone suggests how i can implement this functionality in my application ???? Tag: Request for book recommendations Tag: 54548
  - 13
    - Tooltip for listview subitems Hi! How can I add tooltip for subitems of listview when text longer than visible space? Tag: Request for book recommendations Tag: 54546
  - 14
    - "OpenModelessDialog" issues Sorry for the basic questions; just starting with ASP.NET I am using an HTML button to open another modeless dialog window: <INPUT style="FONT-WEIGHT: bold; Z-INDEX: 119; LEFT: 48px; WIDTH: 103px; COLOR: navy; FONT-STYLE: italic; FONT- FAMILY: arial; POSITION: absolute; TOP: 186px; HEIGHT: 23px" type="button" value="Search Tips" onclick=showModelessDialog("SearchTips.htm")> A few issues: 1. The button works fine in IE, but does absolutely nothing when this ASP.NET page is open in Netscape 2. Is there any way to display something else other then "Untitled" in the dialog's banner. Many thanks in advance, Alex Tag: Request for book recommendations Tag: 54545
  - 15
    - App that manipulates graphics Hello everyone, I'm starting with new endeavour of writing Windows-based application in C# that will manipulate graphic elements in a certain manner (I will describe it briefly bellow). Being a seasoned developer in general, I don't have any experience with what I'm about to start implementing. What I'm looking for is name of technologies (even list o acronyms will be a great start), references to books or articles and may be some guidelines from knowledgeable people on where to start. The application will do the following: taking a file with coordinates of many dots it will render a map of a surface. Once map is rendered, a user will be able to select different shapes (lines, triangles, circles and likes) and draw them upon the map. All those shapes on the map are not just images, their properties can be changed at any time, they can be resized, shifted and deleted. The underlying map is not just an image either, it will have attributes that will govern the look of the map dynamically. That's what I am trying to write. If you have any advice on what to read and where to start in respect to .NET (C#), it would be greatly appreciated. Thank you for your time, Yuriy Zubarev Tag: Request for book recommendations Tag: 54540
  - 16
    - Programatically Triggering Context Help How do I programatically trigger context help mode (i.e. the cursor with the question mark). I am using the .NET classes for context help (HelpProvider) but I want my form to have a maximize and minimize button which means I cannot have the help button in the title bar. I am going to put a help button on the form bu I need to know how to trigger the context help from my button. Thanks - Joel Tag: Request for book recommendations Tag: 54529
  - 17
    - Picture control losing FrameDimension info? Hello, I'm writing an incoming fax manager which includes a basic fax viewer. To display the fax I set the Image property of a Picture (using FromFile()). I also let the user switch pages in a multipage fax and rotate faxes that were transmited upside-down. This is where I discovered that if I rotate the image using: Picture1.Image.RotateFlip(RotateFlipType.Rotate180FlipNone) the Picture control does the rotation, but in the process it "forgets" how many pages the fax file contains (Picture1.Image.GetFrameCount(Imaging.FrameDimention.Page) becomes 1, no matter what it was before the rotation). Is this a known problem? How can I solve it? TIA Tag: Request for book recommendations Tag: 54520
  - 18
    - DataGrid Styles?!? This is a multi-part message in MIME format. ------=_NextPart_000_0125_01C3645C.4C505DD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi all, Is there a way to display data in the datagrid in a column style rather = than in a row style for each record? I am trying to use the datagrid = instead of the ole MSFlexGrid. I cannot seem to figure it out. Any = ideas or thoughts would be helpful. I am a newbie so be gentle.=20 Thanks, Brian Hammer ------=_NextPart_000_0125_01C3645C.4C505DD0 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 6.00.2800.1170" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Hi all,</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Is there a way to display data in the = datagrid in a=20 column style rather than in a row style for each record?  I am = trying to=20 use the datagrid instead of the ole MSFlexGrid.  I cannot seem to = figure it=20 out.  Any ideas or thoughts would be helpful.  I am a newbie = so be=20 gentle. </FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Brian Hammer</FONT></DIV></BODY></HTML> ------=_NextPart_000_0125_01C3645C.4C505DD0-- Tag: Request for book recommendations Tag: 54516
  - 19
    - Shell Context Menu Many moons ago I asked a question about getting a handle on the shell context menu so I can cause it to pop u in a C# app. I have managed to get there by cannibalising some code from an explorer type app I found but it seems very long winded. Has anybody got any pointers to a straightforward way to get this menu to appear? Regards. Tag: Request for book recommendations Tag: 54508
  - 20
    - Login Screen I want to create a login screen that controls access to a Win 98 machine. This windows form should not allow the user to access the machine unless he enters one of the correct passwords. Also the application should not be seen in the system tray (after pressing Ctrl+Alt+Del). Can anyone suggests how i can implement this functionality in my application ???? Tag: Request for book recommendations Tag: 54501
  - 21
    - DotNet HTTPMail implementation for Hotmail? Does anyone have an example of an httpmail interface written in dotnet (vb.net or c#) that actually works? The only example I can find uses MSXML2, and doesn't even work... I have tried implementing one myself, but I randomly either have it work, or more often, I get back a 503 error, with a X-Dav-Error 804 sub error... TIA Nick Jacobsen Tag: Request for book recommendations Tag: 54493
  - 22
    - Earn $500 to $700 per Week Downloading FREE Software We know it sounds TOO good to BE true, but it?s REAL! Our International Technology firm will pay you hard cash each time FREE software is downloaded. Best of all you will only have to download ONE piece of software ONE time for FREE and you can be on your way to earning BIG! FIND OUT MORE BY VISITING http://JeromeMcCrea.PlugUsIn4Cash.com Tag: Request for book recommendations Tag: 54492
  - 23
    - Getting a Control from an HWND. I'm trying to build a GUI automation tool to test a VS.Net add-in. To do this, I want to be able to walk the window hierarchy starting at the app's main window. Is there a way to get a System.Windows.Forms.Control from an HWND? I've tried calling Control.FromHandle(HWND) and it always returns null. I can't get NativeWindow.FromHandle(HWND) to return anything but null either. I'm getting the window handle to the VS7 IDE using FindWindow, which I'm importing from User32.dll: [DllImport("user32.dll", SetLastError=true)] private static extern IntPtr FindWindow(string lpClassName, string lpWindowName); I start VS7 here: System.Diagnostics.Process xProcess = System.Diagnostics.Process.Start(@"C:\Program Files\Microsoft Visual Studio .NET\Common7\IDE\devenv.exe"); xProcess.WaitForInputIdle(); xHWND = FindWindow("wndclass_desked_gsk", xProcess.MainWindowTitle); Once I've got xHWND, it's a valid handle and I can manipulate it (minimize, maximize, enumerate child windows, etc.) with other imported functions from User32.dll, but if I give it to System.Windows.Forms.Control.FromHandle(), I get null back. If I give it to System.Windows.Forms.NativeWindow.FromHandle() I get null back. Is there a way to do this at all? I'm in the process of building my own classes for Win32 windowing because I can't seem to get the native .Net implementation to work. Does it not work intentionally, or is there something more I need to do? -J Tag: Request for book recommendations Tag: 54490
  - 24
    - conversion Hi, I have web browser control in my windows form and am implementing the following event: ***************************************** public void BeforeNavigate(string URL, int Flags, string TargetFrameName, ref object PostData, string Headers, ref bool Cancel) ***************************************** When I navigate on an htm file and submit the data (form with post method), what I see on PostData var is the bytes in System.Array. I tried the following code: ***************************************** Stream s = (Stream)PostData; Byte[] read = new Byte[32]; int bytes = s.Read(read, 0, read.Length); string str = Encoding.ASCII.GetString(b); MessageBox.Show(str); ***************************************** But it complains that improper casting from object to stream. So, how do I convert this PostData to string in order to see the actual data? Please help. Thanks! -CL Tag: Request for book recommendations Tag: 54480
  - 25
    - DataGridTextBox I am working on some of my own column styles. I want them to use the DataGridTextBox control so I don't have to rewrite the guts of it. Whenever I do use it though I get an exception when I try and type in it. The exception occurs in the OnKeyPress method of the DataGridTextBox. I cannot see the code that is written there so unfortunatly I can figure out what reference is missing. The exception is "Object reference not set to an instance of an object". Thanks in advance for any help you can provide. Brandon Tag: Request for book recommendations Tag: 54479

Anyone know of any books that tell you how to do cool stuff with Windows
applications?
I'm talking things like:
How to make your interface look like Microsoft Money.
How to make your application run like Outlook.
How to make your windows dock like Visual Studio.
How to make controls slide across your screen when you click on something.

I don't care about the "this is how you add a menu to the form" stuff.

Any suggestions are welcome. Thanks!

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