datagridview导出excel

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace DXGXGIS
{
class ExportToExcel
{
public void ExportDataGridViewToExcel(DataGridView dataGridview1)
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Filter = "Execl 文件(*.xls)|*.xls";
saveFileDialog.FilterIndex = 0;
saveFileDialog.RestoreDirectory = true;
saveFileDialog.CreatePrompt = true;
saveFileDialog.Title = "导出Excel";
DateTime now = DateTime.Now;
saveFileDialog.FileName = now.Year.ToString().PadLeft(2) + now.Month.ToString().PadLeft(2, '0') + now.Day.ToString().PadLeft(2, '0') + "-" + now.Hour.ToString().PadLeft(2, '0') + now.Minute.ToString().PadLeft(2, '0') + now.Second.ToString().PadLeft(2, '0');
//saveFileDialog.ShowDialog();
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
Stream myStream;
myStream = saveFileDialog.OpenFile();
StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding("gb2312"));
string str = "";
string tempStr = string.Empty;
try
{
//写标题
for (int i = 0; i < dataGridview1.ColumnCount; i++)
{
if (i > 0)
{
str += "/t";
}
str += dataGridview1.Columns[i].HeaderText;
}
sw.WriteLine(str);
//写内容
for (int j = 0; j < dataGridview1.Rows.Count - 1; j++)
{
for (int k = 0; k < dataGridview1.Columns.Count; k++)
{
if (k > 0)
{
tempStr += "/t";
}
tempStr += dataGridview1.Rows[j].Cells[k].Value.ToString();
}
sw.WriteLine(tempStr);
tempStr = string.Empty;
}
sw.Close();
myStream.Close();
MessageBox.Show("导出成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception e)
{
MessageBox.Show(e.ToString(), "出现异常", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
sw.Close();
myStream.Close();
}
}
else
{
MessageBox.Show("导出失败!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
}
}