CODEWITHSUNDEEP
c#.netwinformsvisual-studio-2010datagrid
ponting
ponting

Reputation: 105

Big Red X in windows application

enter image description hereI had seen lot of explanation about the possible reasons behind Red X after googling. Our application displaying only certain systems and only at rare times. Can any body suggest me test case to produce Big Red X in any c# controls preferably DataGrid. I checked the test case given in blog http://www.sturmnet.org/blog/2005/03/23/red-x ,but no way to produce. My main intention is to do some R & D about this issue

Upvotes: 3

Views: 5563

Answers (1)

Victor Zakharov
Victor Zakharov

Reputation: 26454

The big red X occurs when an unhandled exception is being thrown during a Paint event. To reproduce, create the following test class:

public class MyButton : Button
{
  protected override void OnPaint(System.Windows.Forms.PaintEventArgs pevent)
  {
    throw new Exception("my test exception");
  }
}

Build and place this component onto your form. When you start the app, you will see the following image:

enter image description here

You are also likely to see this error for the first time it fails to do Paint:

enter image description here

Upvotes: 2

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