wpf 让正执行的程序暂停几秒钟

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;

        }

    } 

在需要暂停的地方调用即可：DispatcherHelper.DoEvents();

如下面的示例：

    //让它暂停3秒种

    var t = DateTime.Now.AddMilliseconds(3000);

    while (DateTime.Now < t)

         DispatcherHelper.DoEvents();//这里就可以调用了