datagridview添加复选框 支持全选、反选

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms; //需要引用
using System.Drawing;   //需要引用;GDI基本图像

namespace WindowsFormsApplication1
{
    public delegate void CheckBoxClickedHandler（bool state）;
    public class DataGridViewCheckBoxHeaderCellEventArgs : EventArgs
    {
        bool _bChecked;
        public DataGridViewCheckBoxHeaderCellEventArgs（bool bChecked）
        {
            _bChecked = bChecked;
        }
        public bool Checked
        {
            get { return _bChecked; }
        }
    }


    class DatagridViewCheckBoxHeaderCell : DataGridViewColumnHeaderCell
    {
        Point checkBoxLocation;
        Size checkBoxSize;
        bool _checked = false;
        Point _cellLocation

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2013-12-10 09:07  WindowsFormsApplication1\
     目录           0  2013-12-10 09:48  WindowsFormsApplication1\WindowsFormsApplication1\
     文件         914  2013-12-09 20:26  WindowsFormsApplication1\WindowsFormsApplication1.sln
     文件       26112  2013-12-10 09:52  WindowsFormsApplication1\WindowsFormsApplication1.suo
     目录           0  2013-12-10 09:31  WindowsFormsApplication1\WindowsFormsApplication1\bin\
     目录           0  2013-12-10 09:52  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\
     文件       13824  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.exe
     文件       28160  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.pdb
     文件       11600  2013-12-10 09:52  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe
     文件         490  2010-03-17 22:39  WindowsFormsApplication1\WindowsFormsApplication1\bin\Debug\WindowsFormsApplication1.vshost.exe.manifest
     目录           0  2013-12-10 09:31  WindowsFormsApplication1\WindowsFormsApplication1\bin\Release\
     文件        3478  2013-12-10 09:39  WindowsFormsApplication1\WindowsFormsApplication1\DataGridViewCheckBoxHeaderCell.cs
     文件        2127  2013-12-10 09:52  WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs
     文件        4026  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\Form1.Designer.cs
     文件        6543  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\Form1.resx
     目录           0  2013-12-10 09:07  WindowsFormsApplication1\WindowsFormsApplication1\obj\
     目录           0  2013-12-10 09:07  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\
     目录           0  2013-12-10 09:52  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\
     文件        4501  2013-12-10 09:52  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        6647  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2013-12-09 20:26  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\TempPE\
     文件        2803  2013-12-10 09:52  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.csproj.FileListAbsolute.txt
     文件       13824  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.exe
     文件         180  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.Form1.resources
     文件       28160  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.pdb
     文件         180  2013-12-10 09:51  WindowsFormsApplication1\WindowsFormsApplication1\obj\x86\Debug\WindowsFormsApplication1.Properties.Resources.resources
     文件         505  2013-12-10 09:48  WindowsFormsApplication1\WindowsFormsApplication1\Program.cs
     目录           0  2013-12-10 09:07  WindowsFormsApplication1\WindowsFormsApplication1\Properties\
     文件        1398  2013-12-09 20:26  WindowsFormsApplication1\WindowsFormsApplication1\Properties\AssemblyInfo.cs
     文件        2898  2013-12-09 20:26  WindowsFormsApplication1\WindowsFormsApplication1\Properties\Resources.Designer.cs
     文件        5612  2013-12-09 20:26  WindowsFormsApplication1\WindowsFormsApplication1\Properties\Resources.resx
............此处省略3个文件信息