窗口导航中的问题 [英] Problem in window navigation

问题描述

您好，

我正在设计wpf应用程序，我正试图通过此代码从登录屏幕导航到主屏幕...我在那部分成功...我的问题是之后单击主屏幕中的注销按钮我想再次显示登录页面...我在该部分也是成功的...但是再次登录页面后我用户尝试重新登录我收到如下错误...



错误：

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.

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};

     }
 }

推荐答案

我在线阅读的一个解释是

One explanation I read on-line is

Quote：

如果element是Panel的子项（例如Grid），则必须将其从Panel的Children集合中删除。如果将其设置为ContentControl的内容，则必须将该Content设置为null（或其他任何非元素的内容）。

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).

这是一个可能对您有所帮助的链接：

[ WPF错误]



在线更多相同的问题：

[指定的元素已经另一个元素的逻辑子女]

[指定的元素已经是逻辑子元素另一个元素。首先断开连接。]

[指定的元素已经是另一个元素的逻辑子元素。首先断开连接]





我希望这些链接能为您提供帮助。

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.

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