C# WinForm 添加等待界面 利用Gif图片实现

首先 创建 等待窗体 WatingForm：

其次 在WatingForm窗体下编写代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WaitDialog
{
    public partial class WaitingForm : Form
    {
        private static WaitingForm waitForm =null;
        public WaitingForm()
        {
            InitializeComponent();
        }
        public static void ShowForm(string caption)
        {
            if (waitForm == null || waitForm.IsDisposed == true)
                waitForm = new WaitingForm();

            waitForm.Caption.Text = caption;
            waitForm.Refresh();
            //System.Threading.Thread.Sleep(500);
            waitForm.ShowDialog();
        }
        public static void CloseForm(string caption)
        {
            if (waitForm != null && waitForm.IsDisposed == false)
            {
                waitForm.Caption.Text = caption;
                waitForm.Refresh();
                System.Threading.Thread.Sleep(1000);
                waitForm.Dispose();
            }
        }
        public static void SetCaption(string caption)
        {
            if (waitForm != null && waitForm.IsDisposed == false)
            {
                waitForm.Caption.Text = caption;
                waitForm.Refresh();
            }
        }
    }

}

最后 调用窗体MainParentForm 中添加组件 BackgroundWorker,窗体加载下代码：

 private void WaitParentForm_Load(object sender, EventArgs e)
        {
            backgroundWorker1.RunWorkerAsync();
            WaitDialog.WaitingForm.ShowForm("数据下载中");            
        }

backgroundWorker相关代码：

 private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
           //程序处理，加载数据代码。。。。            
        }

        private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {   
            WaitDialog.WaitingForm.CloseForm("加载完毕");
        }   

完成！