public FileResult DaochuExcel()
 {
 //创建Excel文件的对象
 NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
 //添加一个sheet(一个book可以有多个sheet)
 NPOI.SS.UserModel.ISheet sheet1 = book.CreateSheet("Sheet1")
 //sheet1.Rows.RowHeight = 25;
 //worksheet.Columns.ColumnWidth = 24; 设置行高宽度

NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow(0);

 row1.Height = 3 * 265;
 IFont cfont = book.CreateFont();
 cfont.FontName = "宋体";
 cfont.FontHeight = 1 * 256;
 row1.CreateCell(0).SetCellValue("标题");
 sheet1.SetColumnWidth(0, 20*256);
 //sheet1.VerticallyCenter = false;
 //sheet1.HorizontallyCenter = false;  设置水平垂直居中
 //row1.Cells[0].CellStyle.GetFont(book).FontName = "黑体";  //单独设置第一行第一个单元格的字体
 //row1.Cells[0].CellStyle.GetFont(book).FontHeight = 2 * 256; //单独设置第一行
//获取list数据
List<table> ListInfo= ;
 for (int i = 0; i < ListInfo.Count; i++)
 {
 NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + 1);
 rowtemp.CreateCell(0).SetCellValue(ListInfo[i].columnName);
 }
 Response.ContentType = "application/vnd.ms-excel;charset=UTF-8";
 // 写入到客户端
System.IO.MemoryStream ms = new System.IO.MemoryStream();
 book.Write(ms);
 ms.Seek(0, SeekOrigin.Begin);
 ms.Flush();
 ms.Position = 0;
 return File(ms, "application/vnd.ms-excel", "ExcelName.xls");
}