[ASP.NET]两种导出网页到EXCEL的方法

第一种，将DataGrid作为参数传入，将DataGrid转成Excel

public bool ToExcel(System.Web.UI.Control ctl) 
  {
   try
   {
    HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
    HttpContext.Current.Response.Charset ="UTF-8";   
    HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
    HttpContext.Current.Response.ContentType ="application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword
    ctl.Page.EnableViewState =false;  
    System.IO.StringWriter  tw = new System.IO.StringWriter() ;
    System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
    ctl.RenderControl(hw);
    HttpContext.Current.Response.Write(tw.ToString());
    HttpContext.Current.Response.End();
    return true;
   }
   catch(Exception e)
   {
    _errormsg = e.Message;
                return false;
   }
  }

第二种，直接将DataSet导出成Excel

public void CreateExcel(DataSet ds,string typeid,string FileName)
  {
   HttpResponse resp;
   resp = Page.Response;
   resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
   resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);
   resp.Charset ="UTF-8";    
   
   string colHeaders= "", ls_item="";
   int i=0;

   //定义表对象与行对像，同时用DataSet对其值进行初始化
   DataTable dt=ds.Tables[0];
   DataRow[] myRow=dt.Select("");
   // typeid=="1"时导出为EXCEL格式文件；typeid=="2"时导出为XML格式文件
   if(typeid=="1")
   {

   resp.ContentType ="application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword
    //取得数据表各列标题，各标题之间以\t分割，最后一个列标题后加回车符
    for(i=0;i<dt.Columns.Count-1;i++)
     colHeaders+=dt.Columns[i].Caption.ToString()+"\t";
    colHeaders +=dt.Columns[i].Caption.ToString() +"\n";  
    //向HTTP输出流中写入取得的数据信息
    resp.Write(colHeaders);
    //逐行处理数据 
    foreach(DataRow row in myRow)
    {
     //在当前行中，逐列获得数据，数据之间以\t分割，结束时加回车符\n
     for(i=0;i<dt.Columns.Count-1;i++)
      ls_item +=row[i].ToString().Replace("\t","") + "\t";    
     ls_item += row[i].ToString().Replace("\t","") +"\n";
     //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据   
     resp.Write(ls_item);
     ls_item="";
    }
   }
   else
   {
    if(typeid=="2")
    {
     //从DataSet中直接导出XML数据并且写到HTTP输出流中
     resp.Write(ds.GetXml());
    }   
   }
   //写缓冲区中的数据到HTTP头文件中
   resp.End();
  }