如何检查 WPF 窗口打开或关闭
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/21038615/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
提示：将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间：2020-09-13 10:28:54 来源:igfitidea点击:
How to check WPF window open or close
提问by EBS
I want to check if some window is opened or closed. If the window is already open focus it. if the window is already close, open the window.
我想检查某个窗口是打开还是关闭。如果窗口已经打开就聚焦它。如果窗户已经关闭，请打开窗户。
I use this code:
我使用这个代码：
public static bool IsWindowOpen<T>(string name = "") where T : Window
{
return string.IsNullOrEmpty(name)? Application.Current.Windows.OfType<T>().Any(): Application.Current.Windows.OfType<T>().Any(w => w.Name.Equals(name));
}
private void MenuItem1_OnClick(object sender, RoutedEventArgs e)
{
if (IsWindowOpen<Window>("TestForm")) return;
var window1 = new Window1 { Name = "TestForm", Title = "Welcome", };
window1.Show();
}
Can you help with this?
你能帮忙解决这个问题吗？
回答by Lifeless
public static T IsWindowOpen<T>(string name = null)
where T : Window
{
var windows = Application.Current.Windows.OfType<T>();
return string.IsNullOrEmpty(name) ? windows.FirstOrDefault() : windows.FirstOrDefault(w => w.Name.Equals(name));
}
private void MenuItem1_OnClick(object sender, RoutedEventArgs e)
{
var window = IsWindowOpen<Window>("TestForm");
if (window != null)
{
window.Focus();
}
else
{
window = new Window1 { Name = "TestForm", Title = "Welcome", };
window1.Show();
}
}
