winform datagridview 导出excel

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using Microsoft.Office.Interop.Excel;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WebCrawl
{
    class Excel
    {
        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);

public static void ExportExcel( DataGridView myDGV)
        {
            if (myDGV.Rows.Count > 0)
            {

string saveFileName = "";
                //bool fileSaved = false; 
                SaveFileDialog saveDialog = new SaveFileDialog();
                saveDialog.DefaultExt = "xls";
                saveDialog.Filter = "Excel文件|*.xls";
                //saveDialog.FileName = fileName;
                saveDialog.ShowDialog();
                saveFileName = saveDialog.FileName;
                if (saveFileName.IndexOf(":") < 0) return; //被点了取消  
                Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
                if (xlApp == null)
                {
                    MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");
                    return;
                }
                //Microsoft.Office.Interop.Excel.Application _excelApplicatin = null;
                //_excelApplicatin = new Microsoft.Office.Interop.Excel.Application();
                //_excelApplicatin.Visible = true;
                //_excelApplicatin.DisplayAlerts = true;

Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
                Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
                Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 
                Microsoft.Office.Interop.Excel.Range range;
                range = (Microsoft.Office.Interop.Excel.Range)worksheet.get_Range("A1","J1");
                range.Select();
                xlApp.ActiveWindow.SplitColumn = 0;
                xlApp.ActiveWindow.SplitRow = 1;
                xlApp.ActiveWindow.FreezePanes = true;
                //xlApp.ActiveWindow.FreezePanes = true;
               
                range.Font.Name = "微软雅黑";
                range.Font.Size = 10;
                range.WrapText = true;
                range.EntireColumn.AutoFit();
                range.HorizontalAlignment = XlHAlign.xlHAlignCenter;
                range.VerticalAlignment = XlVAlign.xlVAlignCenter; ;

//写入标题 
                for (int i = 0; i < myDGV.ColumnCount; i++)
                {
                    worksheet.Cells[1, i + 1] = myDGV.Columns[i].HeaderText;
                }
                //写入数值 
                for (int r = 0; r < myDGV.Rows.Count-1; r++)
                {

for (int i = 0; i < myDGV.ColumnCount; i++)
                    {
                        worksheet.Cells[r + 2, i + 1] = myDGV.Rows[r].Cells[i].Value;
                       
                    }
                    object Cell1="A"+(r+2)+"";
                    object Cell2="J"+(r+2)+"";
                    worksheet.get_Range(Cell1,Cell2).Font.Name = "微软雅黑";
                    worksheet.get_Range(Cell1,Cell2).Font.Size = 10;
                    worksheet.get_Range("C" + (r + 2) + "", "C" + (r + 2) + "").Font.Color = System.Drawing.Color.FromArgb(128, 0, 128).ToArgb();
                    //worksheet.get_Range("C" + (r + 2) + "", "C" + (r + 2) + "").Interior.Color = System.Drawing.Color.FromArgb(255, 204, 153).ToArgb();
                    //worksheet.get_Range(Cell1, Cell2).WrapText = true;
                    worksheet.get_Range(Cell1, Cell2).HorizontalAlignment = XlHAlign.xlHAlignCenter;
                    worksheet.get_Range(Cell1, Cell2).VerticalAlignment = XlVAlign.xlVAlignCenter;
                    worksheet.get_Range(Cell1, Cell2).Borders.LineStyle = XlLineStyle.xlContinuous;
                    System.Windows.Forms.Application.DoEvents();
                }
                worksheet.Columns.EntireColumn.AutoFit();//列宽自适应 
                //if (Microsoft.Office.Interop.cmbxType.Text != "Notification") 
                //{ 
                //    Excel.Range rg = worksheet.get_Range(worksheet.Cells[2, 2], worksheet.Cells[ds.Tables[0].Rows.Count + 1, 2]); 
                //    rg.NumberFormat = "00000000"; 
                //}

if (saveFileName != "")
                {
                    try
                    {
                        workbook.Saved = true;
                        //workbook.SaveCopyAs(saveFileName);
                        workbook.SaveAs(saveFileName, Microsoft.Office.Interop.Excel.XlFileFormat.xlExcel8, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
                       
                        //fileSaved = true; 
                    }
                    catch (Exception ex)
                    {
                        //fileSaved = false; 
                        MessageBox.Show("导出文件时出错,文件可能正被打开！\n" + ex.Message);
                    }

}
                //else 
                //{ 
                //    fileSaved = false; 
                //} 
                xlApp.Quit();
                GC.Collect();//强行销毁
                Kill(xlApp);
                // if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL 
            }
            else
            {
                return;
            }

}
        public static void Kill(Microsoft.Office.Interop.Excel.Application excel)
        {
            IntPtr t = new IntPtr(excel.Hwnd); //得到这个句柄，具体作用是得到这块内存入口

int k = 0;
            GetWindowThreadProcessId(t, out k); //得到本进程唯一标志k
            System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k); //得到对进程k的引用
            p.Kill(); //关闭进程k
        }
    }
}