.net 导出excel

1、dataset

 private void CreateEcel(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);
            string colHeader = "", ls_items = "";
            int i = 0;

            //定义表对象和行对象，同时用DataSet对其进行初始化
            DataTable dt = ds.Tables[0];
            DataRow[] myRow = dt.Select("");
            //typeid=1时导出excel格式文件；typeid=2导出xml文件格式
            if (typeid=="1")
            {
                //取得数据表各列标题，各标题之间以\t分割，最后一个标题返还后加回车符
                for (i = 0; i < dt.Columns.Count-1; i++)
                {
                    colHeader += dt.Columns[i].Caption.ToString()+"\t";
                 }
                colHeader += dt.Columns[i].Caption.ToString() + "\n";
                //向http输出流写入取得的数据信息
                resp.Write(colHeader);
                //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_items += row[i].ToString() + "\t";
                    }
                    ls_items += row[i].ToString() + "\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_items);
                    ls_items = "";
                }            
            }
            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();
        }

 

2、grid

 private void ToExcel(System.Web.UI.Control ctl)
        {
            HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=Excel.xls");
            HttpContext.Current.Response.Charset = "GB2312";
            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 HtmlTextWriter(tw);
            ctl.RenderControl(hw);
            HttpContext.Current.Response.Write(tw.ToString());
            HttpContext.Current.Response.End();
        }
        public override void VerifyRenderingInServerForm(Control control)
        {
            //base.VerifyRenderingInServerForm(control);
        }