控件DataGridView 单元格合并 二维表头 复合表头

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

namespace WindowsApplication15
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
            this.CancelButton = this.button1;
            DataTable dt = new DataTable（）;
            dt.Columns.Add（“1“）;
            dt.Columns.Add（“2“）;
            dt.Columns.Add（“3“）;
            dt.Columns.Add（“4“）;
            dt.Rows.Add（“中国“ “上海“ “5000“ “7000“）;
            dt.Rows.Add（“中国“ “北京“ “3000“ “5600“）;
            dt.Rows.Add（“美国“ “纽约“ “6000“ “8600“）;
            dt.Rows.Add（“美国“ “华劢顿“ “8000“ “9000“）;
            dt.Rows.Add（“英国“

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-05-01 17:47  DataviewgridRowMerge\
     目录           0  2018-05-01 17:47  DataviewgridRowMerge\DataviewgridRowMerge\
     文件        4035  2018-05-01 17:46  DataviewgridRowMerge\DataviewgridRowMerge\DataviewgridRowMerge.csproj
     文件        7445  2008-12-08 09:23  DataviewgridRowMerge\DataviewgridRowMerge\Form1.Designer.cs
     文件        1356  2008-12-08 09:23  DataviewgridRowMerge\DataviewgridRowMerge\Form1.cs
     文件        7008  2008-12-08 09:23  DataviewgridRowMerge\DataviewgridRowMerge\Form1.resx
     文件         481  2008-12-08 09:22  DataviewgridRowMerge\DataviewgridRowMerge\Program.cs
     目录           0  2008-12-08 09:03  DataviewgridRowMerge\DataviewgridRowMerge\Properties\
     文件        1212  2008-12-08 09:03  DataviewgridRowMerge\DataviewgridRowMerge\Properties\AssemblyInfo.cs
     文件        2880  2018-05-01 17:46  DataviewgridRowMerge\DataviewgridRowMerge\Properties\Resources.Designer.cs
     文件        5612  2008-12-08 09:03  DataviewgridRowMerge\DataviewgridRowMerge\Properties\Resources.resx
     文件        1120  2018-05-01 17:46  DataviewgridRowMerge\DataviewgridRowMerge\Properties\Settings.Designer.cs
     文件         249  2008-12-08 09:03  DataviewgridRowMerge\DataviewgridRowMerge\Properties\Settings.settings
     文件       16190  2008-12-08 09:04  DataviewgridRowMerge\DataviewgridRowMerge\RowMergeView.cs
     文件        1585  2008-12-08 09:04  DataviewgridRowMerge\DataviewgridRowMerge\RowMergeView.designer.cs
     文件        6189  2008-12-08 09:04  DataviewgridRowMerge\DataviewgridRowMerge\RowMergeView.resx
     目录           0  2018-05-01 17:46  DataviewgridRowMerge\DataviewgridRowMerge\bin\
     目录           0  2018-05-01 17:51  DataviewgridRowMerge\DataviewgridRowMerge\bin\Debug\
     文件       19968  2018-05-01 17:51  DataviewgridRowMerge\DataviewgridRowMerge\bin\Debug\WindowsApplication15.exe
     文件       34304  2018-05-01 17:51  DataviewgridRowMerge\DataviewgridRowMerge\bin\Debug\WindowsApplication15.pdb
     文件       11608  2018-05-01 17:51  DataviewgridRowMerge\DataviewgridRowMerge\bin\Debug\WindowsApplication15.vshost.exe
     文件         490  2010-03-17 22:39  DataviewgridRowMerge\DataviewgridRowMerge\bin\Debug\WindowsApplication15.vshost.exe.manifest
     目录           0  2018-05-01 17:52  DataviewgridRowMerge\DataviewgridRowMerge\bin\Release\
     目录           0  2018-05-01 17:46  DataviewgridRowMerge\DataviewgridRowMerge\obj\
     目录           0  2018-05-01 17:51  DataviewgridRowMerge\DataviewgridRowMerge\obj\Debug\
     文件        2270  2018-05-01 17:51  DataviewgridRowMerge\DataviewgridRowMerge\obj\Debug\DataviewgridRowMerge.csproj.FileListAbsolute.txt
     文件         912  2018-05-01 17:50  DataviewgridRowMerge\DataviewgridRowMerge\obj\Debug\DataviewgridRowMerge.csproj.GenerateResource.Cache
     文件        5388  2018-05-01 17:51  DataviewgridRowMerge\DataviewgridRowMerge\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     文件         180  2018-05-01 17:50  DataviewgridRowMerge\DataviewgridRowMerge\obj\Debug\RowMergeView.resources
     目录           0  2018-05-01 17:46  DataviewgridRowMerge\DataviewgridRowMerge\obj\Debug\TempPE\
     文件        4608  2018-05-01 17:46  DataviewgridRowMerge\DataviewgridRowMerge\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll
............此处省略12个文件信息