问题描述
我想在我的WinRT应用程序关闭一个MessageDialog。我注意到,如果我试图表明一次两个消息的对话框中,我得到一个UnauthorizedAccessException。为了避免这种情况,我想关闭现有消息对话框,如果它是开放的。我使用它来显示对话框:
I am trying to close a MessageDialog in my WinRT App. I have noticed if I attempt to show two message dialogs at once, I get an UnauthorizedAccessException. To avoid this, I want to close the existing message dialog if it is open. I use this to show the dialog:
MessageDialog md = new MessageDialog(" ");
private void MessageBox(string s)
{
Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
md.Content = s;
//CLOSE HERE
md.ShowAsync();
}
);
}
我怎么关闭它?
How do I close it?
推荐答案
而不是试图找到一种方法来关闭它,试试这个
声明一个实例变量AsyncCommand;
instead of trying to find a way to close it, try thisdeclare a instance variable for AsyncCommand;
AsyncCommand command;
command = md.ShowAsync();
然后在您的commandhandler,运行你的方法检查,如果命令为null
then in your commandhandler, before running your method check if command is null
if(command!=null)
{
command.Cancel();
}
//
做的东西/ TRYAGAIN块
//do stuff/ tryagain block
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