asp.net无组件导出Excel

最近要做个一导出数据功能，网上找了下，没有找到 有的说要Excel.dll等等 导出pdf好像需要第三方dll支持

下边是我导出Excel的源码 大家谁有好的解决方案 不防给我介绍下 源码里的数据是我模拟的

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
public partial class ReportExel : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
    {
    }
protected void Button1_Click(object sender, EventArgs e)
    {
        DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        DataColumn coll = dt.Columns.Add("Title", typeof(string));
        coll.AllowDBNull = false;
        coll.Unique = true; DataRow dr;
for (int i = 0; i < 10; i++)
        {
            dr = dt.NewRow();//新行 
            dr["Title"] = "第" + i + "列数据";
            dt.Rows.Add(dr);
        }
        ds.Tables.Add(dt);
        ExportDataToExcel(dt, "续办人事代理");
//CreateExcel(ds, "aa.xls");
    }
/// <summary>
/// 
/// </summary>
/// <param name="dt"></param>
/// <param name="strFileName">含.xls</param>
    public static void ExportDataToExcel(DataTable dt, string FileName)
    {
try
        {
            StringWriter sw = new StringWriter();
string colstr = "";
foreach (DataColumn col in dt.Columns)
            {
                colstr += col.ColumnName + "\t";
            }
            sw.WriteLine(colstr);
foreach (DataRow row in dt.Rows)
            {
                colstr = "";
foreach (DataColumn col in dt.Columns)
                {
                    colstr += row[col.ColumnName].ToString() + "\t";
                }
                sw.WriteLine(colstr);
            }
            sw.Close();
            HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName + ".xls", System.Text.Encoding.UTF8));
            HttpContext.Current.Response.ContentType = "application/ms-excel";
            System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.Default;
            System.Web.HttpContext.Current.Response.Write(sw);
            System.Web.HttpContext.Current.Response.End();
        }
catch (Exception ex)
        {
throw ex;
        }
    }
public static void ExportDataToExcelByWeb(DataTable dt,System.Web.UI.WebControls.DataGrid DGOutPut,string FileName)
        {
try
            {
                DGOutPut.Visible=true;
                DGOutPut.DataSource=dt;
                DGOutPut.DataBind();
                System.Web.HttpContext.Current.Response.Clear();
                System.Web.HttpContext.Current.Response.Buffer = true;
                System.Web.HttpContext.Current.Response.Charset = "GB2312";
                System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename="+FileName+".xls");
                System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文
                System.Web.HttpContext.Current.Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 
                DGOutPut.EnableViewState = false;
                System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN", true);
                System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
                System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
                DGOutPut.RenderControl(oHtmlTextWriter);
                System.Web.HttpContext.Current.Response.Write(oStringWriter.ToString());
                System.Web.HttpContext.Current.Response.End();
                DGOutPut.Visible=false;
            }
catch (Exception ex)
            {
throw ex;
            }
        }
}