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
}
}
}