Winform 弹出窗体等待

显示效果：

FrmWaiting.cs:

 public FrmWaitingBox(EventHandler<EventArgs> Method,string msg)
         {
             InitializeComponent();
             if (!string.IsNullOrEmpty(msg))
                 lblTip.Text = msg;
             _Method = Method;
         }
 private EventHandler<EventArgs> _Method;
         private IAsyncResult asyncResult;
         private void timer1_Tick(object sender, EventArgs e)
         {
             if (asyncResult.IsCompleted)
                 this.Close();
         }
         /// <summary>
         /// 窗体第一次加载事件
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void FrmWaitingBox_Shown(object sender, EventArgs e)
         {
             asyncResult = _Method.BeginInvoke(null, null, null,null);
         }

Form1.cs:

 private void btnStart_Click(object sender, EventArgs e)
         {
             var list = new List<User>();
             FrmWaitingBox waitingBox = new FrmWaitingBox((obj, args) =>
             {
                 //Thread.Sleep(5000);
                 for (int i = ; i <= ; i++)
                 {
                     list.Add(new User {
                         Id=i,
                         UserName="Test"+i,
                         Age=+i,
                         Birth=DateTime.Now
                     });
                 }
                 //this.Invoke(new Action(() =>
                 //{
                 //    dgvData.DataSource = list;
                 //}));
             },"数据获取中,请等待!");
             waitingBox.ShowDialog(this);
             dgvData.DataSource = list;
         }
         public class User
         {
             public int Id { get; set; }
             public string UserName { get; set; }
             public int Age { get; set; }
             public DateTime Birth { get; set; }
         }

源代码下载：FrmWaiting

第二种实时显示进度：

源代码：代码下载

第二种源博客地址：https://www.cnblogs.com/lijuanfei/p/6080594.html