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Changing the color of a drawn rectangle

Posted on 2007-12-04
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Last Modified: 2013-12-16
Hi Experts,

   I have a user control (C# 2005 w/ .NET FW 2.0), which has a picture box. When the user control gets created for the first time, I draw a rectangle on top of it using the picture box' Graphics object and the FillRectangle (Brush, RectangleF) function (using a SolidBrush).  I have a public method, that's supposed to allow the user to change the rectangle's color.  My question is: How do I change the color of that existing rectangle? I tried saving the RectangleF object and just calling the FillRectangle function on it a second time using a different Brush color, but that returns a "Parameter is not valid" error.

Any help would be greatly appreciated.

Thanks,
axnst2
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Question by:axnst2
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Accepted Solution

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Bob Learned earned 500 total points
ID: 20403610
You could use a private field value to store the selected color, and then call the Invalidate method for the PictureBox to fire the Paint event, and fill the rectangle in the Paint event handler, using the stored color for the SolidBrush.

Bob
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Author Comment

by:axnst2
ID: 20404782
Thanks Bob,

   That was it...

~axnst2
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Author Closing Comment

by:axnst2
ID: 31412595
Good Job!!!!
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