c# 导入Excel 委托 进度条 可复用

导入excel时候由于时间过长 窗体会假死，利用 委托线程 展示进度条 给用户良好体验

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;
using System.Threading;

namespace WindowsFormsApplication1
{

    //public delegate void SetPos（string showLabelText）;//代理
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        private void button1_Click（object sender EventArgs e）
        {
            //把需要执行的方法委托给form2  
            Form2 f = new Form2（“上传中“aa）;
            f.ShowDialog（）;
            
           
        }

  

        public void dd（string d） {
            MessageBox.Show（“ddd“ + d）;
        }
        //耗时间的方法。
        publi

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件      11776  2017-12-14 14:00  WindowsFormsApplication2\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.exe

     文件      34304  2017-12-14 14:00  WindowsFormsApplication2\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.pdb

     文件      11592  2017-12-14 14:37  WindowsFormsApplication2\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe

     文件        490  2009-06-11 05:14  WindowsFormsApplication2\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe.manifest

     文件      11264  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\bin\Release\WindowsFormsApplication1.exe

     文件      28160  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\bin\Release\WindowsFormsApplication1.pdb

     文件       1055  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\Form1.cs

     文件       2124  2017-12-14 14:08  WindowsFormsApplication2\WindowsFormsApplication1\Form1.Designer.cs

     文件       5814  2017-12-14 14:08  WindowsFormsApplication2\WindowsFormsApplication1\Form1.resx

     文件       4264  2017-12-14 14:08  WindowsFormsApplication2\WindowsFormsApplication1\Form2.cs

     文件       3683  2017-12-14 13:58  WindowsFormsApplication2\WindowsFormsApplication1\Form2.Designer.cs

     文件       6019  2017-12-14 13:58  WindowsFormsApplication2\WindowsFormsApplication1\Form2.resx

     文件       1285  2017-12-14 14:37  WindowsFormsApplication2\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.csproj.FileListAbsolute.txt

     文件        905  2017-12-14 13:59  WindowsFormsApplication2\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.csproj.GenerateResource.Cache

     文件      11776  2017-12-14 14:00  WindowsFormsApplication2\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.exe

     文件        180  2017-12-14 13:59  WindowsFormsApplication2\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.Form1.resources

     文件        180  2017-12-14 13:59  WindowsFormsApplication2\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.Form2.resources

     文件      34304  2017-12-14 14:00  WindowsFormsApplication2\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.pdb

     文件        180  2017-12-14 09:32  WindowsFormsApplication2\WindowsFormsApplication1\obj\Debug\WindowsFormsApplication1.Properties.Resources.resources

     文件       1303  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\obj\Release\WindowsFormsApplication1.csproj.FileListAbsolute.txt

     文件        905  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\obj\Release\WindowsFormsApplication1.csproj.GenerateResource.Cache

     文件      11264  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\obj\Release\WindowsFormsApplication1.exe

     文件        180  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\obj\Release\WindowsFormsApplication1.Form1.resources

     文件        180  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\obj\Release\WindowsFormsApplication1.Form2.resources

     文件      28160  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\obj\Release\WindowsFormsApplication1.pdb

     文件        180  2017-12-14 14:38  WindowsFormsApplication2\WindowsFormsApplication1\obj\Release\WindowsFormsApplication1.Properties.Resources.resources

     文件        505  2017-12-14 09:27  WindowsFormsApplication2\WindowsFormsApplication1\Program.cs

     文件       1380  2017-12-14 09:27  WindowsFormsApplication2\WindowsFormsApplication1\Properties\AssemblyInfo.cs

     文件       2898  2017-12-14 09:27  WindowsFormsApplication2\WindowsFormsApplication1\Properties\Resources.Designer.cs

     文件       5612  2017-12-14 09:27  WindowsFormsApplication2\WindowsFormsApplication1\Properties\Resources.resx

............此处省略20个文件信息