How do I add a context menu to a control
The frame will manage a context menu for you if you set the control’s ContextMenu property. Here is some code adding a context menu to a Label. //Add Menus in your form’s constructor… this.pictureContextMenu = new ContextMenu(); this.pictureContextMenu.MenuItems.Add(‘&Color’, new EventHandler(Color_Clicked)); this.pictureContextMenu.MenuItems.Add(‘&Font’, new EventHandler(Font_Clicked)); label1.ContextMenu = this.pictureContextMenu; // // TODO: Add any constructor code after InitializeComponent call // } private void Font_Clicked(object sender, System.EventArgs e) { . . . } private void Color_Clicked(object sender, System.EventArgs e) { … }
How can I save a temporary disk file from an embedded string resource
//usage: string s = CopyResourceToTempFile(GetType(), ‘showcase.txt’); //where showcase.txt is an embedded resource static string CopyResourceToTempFile(Type type, string name) { string temp = ”; string nsdot = type.Namespace; if (nsdot == null) nsdot = ”; else if (nsdot != ”) nsdot += ‘.’; Stream stream = type.Module.Assembly.GetManifestResourceStream(nsdot + name); if (stream != null) { StreamReader sr = new StreamReader(stream); temp = Path.GetTempFileName(); StreamWriter sw = new StreamWriter(temp, false); sw.Write(sr.ReadToEnd()); sw.Flush(); sw.Close(); } return temp; }
How do I maximize my main window
To maximize the main window, you can get the handle of the main window in the new process, and then send a SC_MAXIMIZE system command message to it. You can get the handle through the Process.MainWindowHandle property. To send a message you should use the DllImportAttribute attribute to import the API function. This is a sample code: public class WinAPI { public const int WM_SYSCOMMAND = 0x0112; public const int SC_MAXIMIZE = 0xF030; [DllImportAttribute (‘user32.dll’)] public static extern int SendMessage(IntPtr hWnd, int Msg, int wParam, int lParam); } Process p = new Process(); p.StartInfo.FileName = @’D:\Program Files\test.exe’; p.Start(); WinAPI.SendMessage(p.MainWindowHandle, WinAPI.WM_SYSCOMMAND, WinAPI.SC_MAXIMIZE,0); (from [email protected] on microsoft.public.dotnet.framework.windowsforms)
When I try to catch the Resize event to handle sizing of MDI children, the event is called even before my form’s constructor can create the children throwing an exception. How do I avoid this
The Resize event is getting raised before the constructor completes because the form is being resized in the constructor. If you are using VS.NET to create your project, then in your constructor there is a call to InitializeComponent. In this method there is code to resize the form. You could instantiate your child form in your constructor *before* InitializeComponent is called, then when the form gets resized for the first time you already have an instance of your child form. ([email protected]_(Brian_Roder))
How do I prevent a Form from closing when the user clicks on the close button on the form’s system menu
Handle the form’s Closing event. private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e) { if( NotOkToClose() ) e.Cancel = true; //don’t close }