自己在看到网上一些table数据导出excel，自己为自己记录一下以免以后需要

protected void Button1_Click(object sender, EventArgs e)
{
ajaxService ajax = new ajaxService();
DataTable dt = ajax.SearchEmployees1();
Guid guid = Guid.NewGuid();
string stamp = guid.ToString("N");
string path = "~/Fileupimage/axb.xls";
ExportToExcel(dt, Server.MapPath(path));
}

#region 导出Excel表
///
/// 将DataTable或DataSet导出为Excel
/// 修改  2016/7/6
///
/// 需要导出的DataTable,DataSet或GridView
/// Excel的绝对路径
/// 是否成功
public bool ExportToExcel(System.Data.DataTable dt, string AbosultedFilePath)
{
if (dt == null)
return false;
// 创建Excel应用程序对象
Microsoft.Office.Interop.Excel.Application excApp = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook workBook = excApp.Workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
Microsoft.Office.Interop.Excel.Worksheet workSeet = workBook.Worksheets[1]; //取得sheet1
Microsoft.Office.Interop.Excel.Range range = null;
int tableCount = dt.Rows.Count;
int rowRead = 0;
float percent = 0;
for (int i = 0; i < dt.Columns.Count; i++)
{
workSeet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
//设置标题的样式
range = (Microsoft.Office.Interop.Excel.Range)workSeet.Cells[1, i + 1];
range.Font.Bold = true; //粗体
range.Font.Size = "12";//字体大小
range.Font.Name = "宋体";
range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; //居中
range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); //背景色
range.EntireColumn.AutoFit(); //自动设置列宽
range.EntireRow.AutoFit(); //自动设置行高

}
for (int r = 0; r < dt.Rows.Count; r++)
{
for (int c = 0; c < dt.Columns.Count; c++)
{
//写入内容
workSeet.Cells[r + 2, c + 1] = "'" + dt.Rows[r][c].ToString();
//设置样式
range = (Microsoft.Office.Interop.Excel.Range)workSeet.Cells[r + 2, c + 1];
range.Font.Size = 9; //字体大小
range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); //加边框
range.EntireColumn.AutoFit(); //自动调整列宽
}
rowRead++;
percent = ((float)(100 * rowRead)) / tableCount;
//System.Windows.Forms.Application.DoEvents();
}
range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
if (dt.Columns.Count > 1)
{
range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
}
try
{
workBook.Saved = true;
workBook.SaveCopyAs(AbosultedFilePath);
string fileName = "axb.xls";//客户端保存的文件名
//此处实现下载功能
FileInfo fileInfo = new FileInfo(AbosultedFilePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
Response.AddHeader("Content-Length", fileInfo.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = "application/octet-stream";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
Response.WriteFile(fileInfo.FullName);
Response.Flush();
Response.End();
}
catch { }
workBook.Close();
if (excApp != null)
{
excApp.Workbooks.Close();
excApp.Quit();
int generation = System.GC.GetGeneration(excApp);
System.Runtime.InteropServices.Marshal.ReleaseComObject(excApp);
excApp = null;
System.GC.Collect(generation);
}
GC.Collect(); //强行销毁
#region 强行杀死最近打开的Excel进程
System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL");
System.DateTime startTime = new DateTime();
int m, killID = 0;
for (m = 0; m < excelProc.Length; m++)
{
if (startTime < excelProc[m].StartTime)
{
startTime = excelProc[m].StartTime;
killID = m;
}
}
if (excelProc[killID].HasExited == false)
{
excelProc[killID].Kill();
}
#endregion
return true;
}
#endregion