【WPF】实现过渡弹框

/// 

        /// 显示正在执行结果界面
        /// 
        /// 执行结果界面提示文字
        private void ShowDialog(string resultText)

        {
            gridDialog.Visibility = System.Windows.Visibility.Visible;
            borderShadow.Visibility = System.Windows.Visibility.Visible;
            gridResult.Visibility = System.Windows.Visibility.Visible;

            loading.Visibility = System.Windows.Visibility.Hidden;

            textBlockDisplay.Text = resultText;

            //计算位置使显示居中
            gridDialog.Margin = new Thickness(0, scrollViewer1.VerticalOffset-50, 0, 0);//scrollViewer1.VerticalOffset为滚动过的位置
            gridDialog.Height = scrollViewer1.ViewportHeight+100;

            DispatcherTimer timer = new DispatcherTimer();
            timer.Interval = TimeSpan.FromSeconds(1d);
            timer.Tick += (sender, e) =>
            {
                gridDialog.Visibility = System.Windows.Visibility.Hidden;
            };
            timer.Start();
        }
//PS：由于使用到了滚动条所以才有了 设置高度的 那个动作 这个看实际需求来进行修改

 调用：
   TaskScheduler scheduler = TaskScheduler.FromCurrentSynchronizationContext();
                    CancellationToken token = new CancellationToken();
                    Task.Factory.StartNew(new Action(() =>

{
//里面写你的实际需求  如导出Excel的代码
})).ContinueWith(w => { ShowDialog("导出Excel成功！"); }, token, TaskContinuationOptions.None, scheduler);

//PS:调用中使用到了线程中的异步操作 这部分不是很懂 调用的片段可以放到  按钮触发事件