从Form窗口的Gridview导出Excel

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using Microsoft.Office.Interop.Excel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;

private void ButtonSearchOutput_Click(object sender, EventArgs e)

{
//导出当前页DataGridView中的数据到EXcel中
SaveFileDialog saveFileDialog = new SaveFileDialog();//保存对话框

if (dataGridView1.Rows.Count == 0)
{
MessageBox.Show("没有数据可供导出！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
else
{
saveFileDialog.Filter = "Execl files (*.xls)|*.xls";//能保存的类型
saveFileDialog.FilterIndex = 0;//设置默认文件类型顺序
saveFileDialog.RestoreDirectory = true;//保存对话框记住上次打开的文件地址
saveFileDialog.CreatePrompt = true;//要保存的文件名不存在，征求用户同意是否创建一个。
saveFileDialog.Title = "导出到Excel";
saveFileDialog.ShowDialog();
string strName = saveFileDialog.FileName;//保存到文件
if (strName.Length != 0)
{
System.Reflection.Missing miss = System.Reflection.Missing.Value;
//创建一个excel
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
excel.Application.Workbooks.Add(true); ;
excel.Visible = false;//若是true，则在导出的时候会显示EXcel界面。

if (excel == null)
{
MessageBox.Show("EXCEL无法启动！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}

Microsoft.Office.Interop.Excel.Workbooks books = (Microsoft.Office.Interop.Excel.Workbooks)excel.Workbooks;
Microsoft.Office.Interop.Excel.Workbook book = (Microsoft.Office.Interop.Excel.Workbook)(books.Add(miss));
Microsoft.Office.Interop.Excel.Worksheet sheet = (Microsoft.Office.Interop.Excel.Worksheet)book.ActiveSheet;
sheet.Name = "test";

//生成字段名称
for (int i = 0; i < dataGridView1.ColumnCount; i++)
{
excel.Cells[1, i + 1] = dataGridView1.Columns[i].HeaderText.ToString();//获取列集合的第一行
}
//填充数据
for (int i = 0; i < dataGridView1.RowCount - 1; i++)//获取datagridview获得行数
{
for (int j = 0; j < dataGridView1.ColumnCount; j++)
{
if (dataGridView1[j, i].Value == typeof(string))
{
excel.Cells[i + 2, j + 1] = "" + dataGridView1[i, j].Value.ToString();
}
else
{
excel.Cells[i + 2, j + 1] = dataGridView1[j, i].Value.ToString();
}
}
// toolStripProgressBar1.Value += 100 / dataGridView1.RowCount;
}
sheet.SaveAs(strName, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);
book.Close(false, miss, miss);
books.Close();
excel.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
System.Runtime.InteropServices.Marshal.ReleaseComObject(book);
System.Runtime.InteropServices.Marshal.ReleaseComObject(books);
System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
GC.Collect();
MessageBox.Show("数据已经成功导出到：" + saveFileDialog.FileName.ToString(), "导出完成", MessageBoxButtons.OK, MessageBoxIcon.Information);}

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