方法一、利用微软的excel 操作类
引用：using Excel = Microsoft.Office.Interop.Excel;
代码如下:
#region导出数据表：Excle (微软的excel 操作类)
///<summary>
///导出数据表：Excle
///</summary>
///<param name="myDGV"></param>
public void _ToExcel(DataGridView myDGV)
{
string path = "";
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.DefaultExt = "xlsx";
saveDialog.Filter = "Excel文件|*.xlsx";
saveDialog.ShowDialog();
path = saveDialog.FileName;
if (path.IndexOf(":") < 0) return; //判断是否点击取消
try
{
Excel.Application xlApp = new 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;
}
Excel.Workbooks workbooks = xlApp.Workbooks;
Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
int colIndex = 0;
//写入标题
for (int i = 0; i < myDGV.ColumnCount; i++)
{
if (myDGV.Columns[i].Visible)//用作于不导出隐藏列
{
colIndex++;
worksheet.Cells[1, colIndex] = myDGV.Columns[i].HeaderText;
//worksheet.Cells[1, i] = myDGV.Columns[i].HeaderText;
}
}
//写入数值
for (int r = 0; r < myDGV.Rows.Count - 1; r++)
{
colIndex = 0;
for (int i = 0; i < myDGV.ColumnCount; i++)
{
if (myDGV.Columns[i].Visible)
{
colIndex++;
worksheet.Cells[r + 2, colIndex] = myDGV.Rows[r].Cells[i].Value;
}
}
System.Windows.Forms.Application.DoEvents();
}
worksheet.Columns.EntireColumn.AutoFit();//列宽自适应
if (path != "")
{
try
{
workbook.Saved = true;
workbook.SaveCopyAs(path);
//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\r" + ex.Message);
}
}
xlApp.Quit();
GC.Collect();//强行销毁
// if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL
MessageBox.Show(path + "，导出成功", "系统提示", MessageBoxButtons.OK);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
#endregion
方法二、IO基础流操作类
引用：using System.IO;
using System.Threading;
代码如下：
#region导出数据表：Excle (io流操作类)
///<summary>
///导出数据表：Excle (io流操作类)
///</summary>
///<param name="myDGV"></param>
public void _ToExcel2(DataGridView myDGV)
{
string path = "";
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.DefaultExt = "xls";
saveDialog.Filter = "Excel97-2003 (*.xls)|*.xls|All Files (*.*)|*.*";
saveDialog.ShowDialog();
path = saveDialog.FileName;
if (path.IndexOf(":") < 0) return; //判断是否点击取消
try
{
Thread.Sleep(1000);
StreamWriter sw = new StreamWriter(path, false, Encoding.GetEncoding("gb2312"));
StringBuilder sb = new StringBuilder();
//写入标题
for (int k = 0; k < myDGV.Columns.Count; k++)
{
if (myDGV.Columns[k].Visible)//导出可见的标题
{
//"\t"就等于键盘上的Tab,加个"\t"的意思是: 填充完后进入下一个单元格.
sb.Append(myDGV.Columns[k].HeaderText.ToString().Trim() + "\t");
}
}
sb.Append(Environment.NewLine);//换行
//写入每行数值
for (int i = 0; i < myDGV.Rows.Count - 1; i++)
{
System.Windows.Forms.Application.DoEvents();
for (int j = 0; j < myDGV.Columns.Count; j++)
{
if (myDGV.Columns[j].Visible)//导出可见的单元格
{
//注意单元格有一定的字节数量限制,如果超出,就会出现两个单元格的内容是一模一样的.
//具体限制是多少字节,没有作深入研究.
sb.Append(myDGV.Rows[i].Cells[j].Value.ToString().Trim() + "\t");
}
}
sb.Append(Environment.NewLine); //换行
}
sw.Write(sb.ToString());
sw.Flush();
sw.Close();
MessageBox.Show(path + "，导出成功", "系统提示", MessageBoxButtons.OK);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
#endregion
二种方法对比，利用IO基础流导出到Excel表格中的速度最快。特别是上10万行以上的数据，更是能体现其速度。
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