change button background at runtime in user control

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I tried to change the button background at runtime after the controls has been initialized but the button background does not changed any idea i used the following piece of code

I read the image path from xml file it is ok with path and file name

btn1.BackgroundImage = System.Drawing.Image.FromFile(imagepath + x.Attribute(XName.Get("Image")).Value);

Posted 29-Jul-12 21:48pm

Waleedkassem

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OriginalGriff · Answer 1 · 2012-07-29T21:57:00

It works fine for me.
So: the first thing to do is to check that your code is being executed.
Put a breakpoint on the line you show above, and make sure it is hit.
If it is, then create a string which holds the full info:

C#

string path = imagepath + x.Attribute(XName.Get("Image")).Value;

Look at "path" in the debugger, and make sure that the file exists and is fully reachable from that PC.
If that's all ok, look at the BackgroundImage property and make sure it is set to an image.
Then double check that btn1 is actually on the display!

One of those should give you an idea what the problem is: if it doesn't, then tell us what you get at each stage above, and we will see what we can do.

efkah · Answer 2 · 2012-07-29T22:02:00

Solution 2

winforms or wpf?
try this:
`http://msdn.microsoft.com/en-us/library/system.windows.forms.control.update.aspx[^]
you can "force" a control to repaint by calling the update method. there is also something like "startrender" and "stoprender", but i forgot the exact name and usage.

Posted 29-Jul-12 22:02pm

efkah

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Waleedkassem 30-Jul-12 14:32pm

thank you