wpf – 如何停止每次打开一个新窗口？

//First we must create a object of type the new window we want the open.
NewWindowClass newWindow;

private void OpenNewWindow() {
    //Check if the window wasn't created yet
    if (newWindow == null)
    {
        //Instantiate the object and call the Open() method 
        newWindow= new NewWindowClass();
        newWindow.Show();
        //Add a event handler to set null our window object when it will be closed
        newWindow.Closed += new EventHandler(newWindow_Closed);
    }
    //If the window was created and your window isn't active
    //we call the method Activate to call the specific window to front
    else if (newWindow != null && !newWindow.IsActive)
    {
        newWindow.Activate();
    }
}
void newWindow_Closed(object sender,EventArgs e)
{
    newWindow = null;
}

我认为这可以解决你的问题.

ATT,