WaitingFormHelper

using Lba_Ciac;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Lbb.Cx.Ciac.Utility
{
    public class WaitingFormHelper
    {
        private Loading waitingForm = null;

        private Action _method = null;

        private WaitingFormHelper(Action method, string message)
        {
            this._method = method;
            this.waitingForm = new Loading();
            this.waitingForm.Text = message;
            this.waitingForm.StartPosition = FormStartPosition.CenterParent;
            this.waitingForm.Shown += new EventHandler(this.waitingForm_Shown);
        }
        public static void ShowWaitingForm(Action method, string message)
        {
            WaitingFormHelper waitingFormHelper = new WaitingFormHelper(method, message);
            waitingFormHelper.waitingForm.ShowDialog();
        }

        private void waitingForm_Shown(object sender, EventArgs e)
        {
            try
            {
                this._method.BeginInvoke(new AsyncCallback(this.callBack), null);
            }
            catch (System.ObjectDisposedException)
            {
                return;//如果主界面已经退出了，那线程也退出好了。
            }
        }

        private void callBack(IAsyncResult ar)
        {
            if (this.waitingForm != null && !this.waitingForm.IsDisposed)
            {
                this.waitingForm.Invoke(new Action(delegate
                {
                    this.waitingForm.Close();
                }));
            }
        }
    }
}