asp.net导出excel及科学计数问题

导出最简单方法：

const   string  style  =   @"   " ;
            Response.ClearContent();

            Response.AddHeader( " content-disposition " ,  " attachment; filename= "   +  Server.UrlEncode(Name)  +   " .xls " );

            Response.ContentType  =   " application/excel " ;

            StringWriter sw  =   new  StringWriter();

            HtmlTextWriter htw  =   new  HtmlTextWriter(sw);
             // htw.WriteLine(Name);
            System.Web.UI.LiteralControl lt  =   new  LiteralControl();
            lt.Text  =   " " width: 100 % ;font - bold: true ;text - align:center;\ " > "   + Name  +   "

" ;
             if (Name != "" )lt.RenderControl(htw);
            gvdata.RenderControl(htw);
             //  Style is added dynamically

            Response.Write(style);

            Response.Write(sw.ToString());

            Response.End();

 

导出出现科学计数解决办法一：

 

GridView gvdata  =   new  GridView();
                gvdata.HeaderStyle.BackColor  =  System.Drawing.Color.Silver;
                gvdata.HeaderStyle.Font.Bold  =   true ;
                gvdata.HeaderStyle.HorizontalAlign  =  HorizontalAlign.Center;
                gvdata.RowDataBound  +=   new  GridViewRowEventHandler(gvdataRowDataBound);
                gvdata.DataSource  =  dtData;
                gvdata.DataBind();
                 const   string  style  =   @"   " ;
                Response.ClearContent();

                Response.AddHeader( " content-disposition " ,  " attachment; filename= "   +  Server.UrlEncode(strFileName)  +   " .xls " );

                Response.ContentType  =   " application/excel " ;

                StringWriter sw  =   new  StringWriter();

                HtmlTextWriter htw  =   new  HtmlTextWriter(sw);
                 // htw.WriteLine(Name);
                System.Web.UI.LiteralControl lt  =   new  LiteralControl();
                lt.Text  =   " " width: 100 % ;font - bold: true ;text - align:center;\ " > "   +  strFileName  +   "

" ;
                 if  (strFileName  !=   "" ) lt.RenderControl(htw);
                gvdata.RenderControl(htw);
                 //  Style is added dynamically

                Response.Write(style);

                Response.Write(sw.ToString());

                Response.End();
     public   void  gvdataRowDataBound( object  sender, GridViewRowEventArgs e)
    {
         if  (e.Row.RowType  ==  DataControlRowType.DataRow)
        {
            e.Row.Cells[ 0 ].Attributes.Add( " style " ,  " vnd.ms-excel.numberformat:@ " );
            e.Row.Cells[ 2 ].Attributes.Add( " style " ,  " vnd.ms-excel.numberformat:@ " );
        }
    }

另注：  // 1）  文本：vnd.ms-excel.numberformat:@
          // 2）  日期：vnd.ms-excel.numberformat:yyyy/mm/dd
         // 3）  数字：vnd.ms-excel.numberformat:#,##0.00
         // 4）  货币：vnd.ms-excel.numberformat:￥#,##0.00
         // 5）  百分比：vnd.ms-excel.numberformat: #0.00%