Problem in window navigation

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Hello,
I am desiging wpf application and I am trying to navigate from Login screen to Home Screen by this code...I am successful in that part... My problem is that after clicking Logout button in home screen I want to Show again Login Page... I am successful in that part also... But after coming again to login page and i the user tries to relogin I am getting an error as below...

Error :"

Specified element is already the logical child of another element. Disconnect it first.

C#

Views.Home winHome = new Views.Home();
 object tmpwinHome= null ;
 tmpwinHome= winHome.Content;
 winHome.Content = null;


 foreach (Window window in Application.Current.Windows)
 {
  if (window.GetType() == typeof(Login1))
    {
    (window as Login1).Content = new ContentControl() { Content = tmpwinHome};

     }
 }

Posted 5-Dec-13 3:13am

jing567

Updated 5-Dec-13 3:14am

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Sergey Alexandrovich Kryukov 5-Dec-13 12:12pm

In what line? Is it in "Content = tmpwinHome"?

Actually, this exception is the result of a well-known WPF feature which protects you from misuse of child-parent relationships. I mean it: a feature, not a problem. The message is self-explanatory: don't add a UI element to anything, if it is already added to some parent.

—SA

jing567 7-Dec-13 23:29pm

Can u give me any sample snippet code so that I can implement in my apllication

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Dirk_Strauss · Answer 1 · 2013-12-08T21:18:00

One explanation I read on-line is

Quote:
If element is the child of a Panel (e.g. Grid) you have to remove it from the Panel's Children collection. If it is set as Content of a ContentControl, you'd have to set that Content to null (or anything else that is not element).

Here is a link that might help you:
[WPF Error]

Some more of the same questions on-line:
[Specified element is already the logical child of another element]
[Specified element is already the logical child of another element. Disconnect it first.]
[Specified element is already the logical child of another element. Disconnect it first]

I hope that these links will help you.

Problem in window navigation

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Problem in window navigation

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