C#导出EXCEL

public void CreateExcel(DataSet ds, string FileName)

    {        

      HttpResponse resp;

        resp = Page.Response;

        resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");

        resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);

        string colHeaders = "", ls_item = "";

        //定义表对象与行对象，同时用DataSet对其值进行初始化

        DataTable dt = ds.Tables[0];

        DataRow[] myRow = dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的

        int i = 0;

        int cl = dt.Columns.Count;

        //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 < cl; i++)

        {

            if (i == (cl - 1))//最后一列，加\n

            {

                colHeaders += dt.Columns[i].Caption.ToString() + "\n";

            }

            else  

           {

                colHeaders += dt.Columns[i].Caption.ToString() + "\t";

            }

        }

        resp.Write(colHeaders);         //向HTTP输出流中写入取得的数据信息

        //逐行处理数据

          foreach (DataRow row in myRow)

        {

            //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据

                for (i = 0; i < cl; i++)

            {

                if (i == (cl - 1))//最后一列，加\n

                {

                    ls_item += row[i].ToString() + "\n";

                }  

               else

                {   

                  ls_item += row[i].ToString() + "\t";  

               }

            }  

           resp.Write(ls_item);

            ls_item = "";

        }

        resp.End();

    }