WPF界面假死Thread.Sleep卡死的问题解决方法

在winform中用Application.DoEvents()可以解决，但是WPF没有.DoEvents()方法了，可以用如下代码代替:

public static class DispatcherHelper 
{ 
    [SecurityPermissionAttribute(SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)] 
    public static void DoEvents() 
    { 
        DispatcherFrame frame = new DispatcherFrame(); 
        Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background, new DispatcherOperationCallback(ExitFrames), frame); 
        try { Dispatcher.PushFrame(frame); } 
        catch (InvalidOperationException) { } 
    } 
    private static object ExitFrames(object frame) 
    { 
        ((DispatcherFrame)frame).Continue = false; 
        return null; 
    } 
} 

然后添加一个函数

public static void Delay(int mm)
        {
            DateTime current = DateTime.Now;
            while (current.AddMilliseconds(mm) > DateTime.Now)
            {
                DispatcherHelper.DoEvents();
            }
            return;
        }

然后把该用Thread.Sleep(xxx)的地方改成Delay(xxx) 即可