Hi all,
I was playing around with Windows.Forms and found there a problem with the Copy
Paste function. I've created two
textboxes. When I copy the text from the first textbox with CTRL+C and select
then the second textbox and paste
the text with CRTL+V - the whole application is crashing. Attached to this text
is the error code and a test application
where it's quite easy to demonstrate the problem. Maybe it's just a problem on
my computer but it would be great if
someone could try to Copy/Paste in maybe self created applications and give a
short comment -- so than I would know
that the problem is on my machine - or did I miss something from code point of
view ? Thanks in advance.
/alex
The error code:
---
Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object
at System.Windows.Forms.XplatUIX11.UpdateMessageQueue
(System.Windows.Forms.XEventQueue queue) [0x00090] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUIX11.cs:1169
at System.Windows.Forms.XplatUIX11.ClipboardAvailableFormats (IntPtr handle)
[0x0007b] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUIX11.cs:2000
at System.Windows.Forms.XplatUI.ClipboardAvailableFormats (IntPtr handle)
[0x00000] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUI.cs:352
at System.Windows.Forms.Clipboard.GetDataObject () [0x00014] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Clipboard.cs:71
at System.Windows.Forms.TextBoxBase.Paste (System.Windows.Forms.Format
format, Boolean obey_length) [0x00000] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/TextBoxBase.cs:1766
at System.Windows.Forms.TextBoxBase.ProcessKey (Keys keyData) [0x000e0] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/TextBoxBase.cs:861
at System.Windows.Forms.TextBoxBase.WndProc (System.Windows.Forms.Message m)
[0x00025] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/TextBoxBase.cs:1205
at System.Windows.Forms.TextBox.WndProc (System.Windows.Forms.Message m)
[0x00000] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/TextBox.cs:264
at System.Windows.Forms.Control+ControlNativeWindow.WndProc
(System.Windows.Forms.Message m) [0x00000] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:162
at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr
wParam, IntPtr lParam) [0x00053] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/NativeWindow.cs:145
at System.Windows.Forms.XplatUIX11.DispatchMessage (System.Windows.Forms.MSG
msg) [0x00000] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUIX11.cs:2701
at System.Windows.Forms.XplatUI.DispatchMessage (System.Windows.Forms.MSG
msg) [0x00000] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/XplatUI.cs:427
at System.Windows.Forms.Application.RunLoop (Boolean Modal,
System.Windows.Forms.ApplicationContext context) [0x0023c] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Application.cs:521
at System.Windows.Forms.Application.Run (System.Windows.Forms.Form mainForm)
[0x00000] in
/tmp/scratch/BUILD/mono-1.1.17.1/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Application.cs:415
at CopyPaste.MainClass.Main (System.String[] args) [0x00000] in
/home/alex/Data/csharp/CopyPaste/CopyPaste.cs:13
----
-- file CopyPaste.cs
// created on 07.09.2006 at 21:05
using System;
using System.Drawing;
using System.Windows.Forms;
namespace CopyPaste
{
class MainClass
{
public static void Main(string[] args)
{
// Console.WriteLine("Hello World!");
Application.Run(new MainForm());
}
}
}
-- file MainForms.cs
// created on 07.09.2006 at 21:09
using System;
using System.Drawing;
using System.Windows.Forms;
namespace CopyPaste
{
public partial class MainForm : System.Windows.Forms.Form
{
private System.ComponentModel.IContainer components;
private System.Windows.Forms.TextBox tbox_Copy;
private System.Windows.Forms.TextBox tbox_Paste;
//------------------------------------------------------------------------------------------
public MainForm()
{
this.SuspendLayout();
// set the window size
this.Height = 100;
this.Width = 400;
//InitializeComponent();
this.components = new System.ComponentModel.Container();
this.tbox_Copy = new System.Windows.Forms.TextBox();
this.tbox_Paste = new System.Windows.Forms.TextBox();
//
//tbox_Copy
//
this.tbox_Copy.Location = new System.Drawing.Point(12, 15);
this.tbox_Copy.Name = "tbox_Copy";
this.tbox_Copy.Size = new System.Drawing.Size(350, 20);
this.tbox_Copy.TabIndex = 0;
this.tbox_Copy.Text = this.tbox_Copy.Name;
//
//tbox_Paste
//
this.tbox_Paste.Location = new System.Drawing.Point(12,
this.tbox_Copy.Location.Y +
this.tbox_Copy.Height + 15);
this.tbox_Paste.Name = "tbox_Paste";
this.tbox_Paste.Size = new System.Drawing.Size(350, 20);
this.tbox_Paste.TabIndex = 1;
this.tbox_Paste.Text = this.tbox_Paste.Name;
this.Controls.Add(this.tbox_Copy);
this.Controls.Add(this.tbox_Paste);
this.ResumeLayout();
}
}
}
_______________________________________________
Mono-winforms-list maillist - [email protected]
http://lists.ximian.com/mailman/listinfo/mono-winforms-list
