WPF user control problem!! (Switch)

Question

1.00/5 (1 vote)

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Such as title, would like to do with WPF Windows program page switching, the method used is:
After new a user control, first to Clear and then Add.

Method approximately as follows:

C#

System_Function.System_Function_Button SFB = new System_Function_Button();
system_function1_panel1.Children.Clear();
system_function1_panel1.Children.Add(SFB);

But after several switch pages (with the button repeatedly triggered Clear and Add) after an error, the screen that appears as follows:
http://i.imgur.com/N141GDB.png[^]

Windows will crash, solving ~

Posted 3-Jun-14 19:22pm

Member 10862873

Updated 3-Jun-14 22:19pm

ridoy

v2

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Comments

Richard MacCutchan 4-Jun-14 4:25am

Your system_function1_panel1 reference is getting corrupted or destroyed somewhere. And with those cross references between controls it is little wonder. You need to use your debugger to find out where.

johannesnestler 4-Jun-14 11:05am

check if your System_function1_panel1 is null before trying to add to ist children. But such code "smells" - better redesign your control handling - Looks you are cross referencing controls - try to build better encapsulation.

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