using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using LoadingIndicators.WPF;
using System.Threading.Tasks;

namespace PLC_Data_Backup
{
    public class CommHelper
    {
        public static void FastTask(Action _actionDoing, Action _actionAfter=null)
        {
            ProcessControl loading = new ProcessControl();
            Task t = new Task(() =>
            {
                try
                {
                    _actionDoing();

                    Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                    {
                        loading.Close();

                    }));
                    if (_actionAfter != null)
                    { _actionAfter(); }
                }
                catch (Exception ex)
                {
                    Application.Current.Dispatcher.Invoke(new Action(() =>
                    {

                        loading.Close();
                        MessageBox.Show("失败\r\n" + ex.ToString());//new PopupWindow().ShowThis("绘图失败");
                    }));
                }
            });
            t.Start();
            loading.ShowDialog();
            ;
        }
    }
}

FastTask(Action _actionDoing, Action _actionAfter = null)

_actionDoing是等待中做的事情,

_actionAfter是等待做完之后做的事情,如果跨线程请考虑跨线程调用

2:添加动画  dll

3:开始测试

private void Button_Click(object sender, RoutedEventArgs e)
        {
            CommHelper.FastTask(new Action(() =>
                {
                    Thread.Sleep(1000);//干复杂的事情
                }),
                new Action(()=>
                {
                    MessageBox.Show("加载完成");
                }));
        }