导出EXCEL

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Text;

public partial class _ss : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("col1");
        dt.Columns.Add("col2");
        dt.Columns.Add("col3");
        dt.Columns.Add("col4");
        dt.Columns.Add("col5");

        for (int i = 0; i < 5000; i++)
        {
            DataRow dr = dt.NewRow();
            dr.ItemArray = new object[]{System.Guid.NewGuid().ToString(),
            System.Guid.NewGuid().ToString(),
            System.Guid.NewGuid().ToString(),
            System.Guid.NewGuid().ToString(),
            System.Guid.NewGuid().ToString()};

            dt.Rows.Add(dr);
        }

        if (dt != null)
        {
            StringBuilder sr = new StringBuilder();
            foreach (DataColumn col in dt.Columns)
            {
                sr.Append(col.ColumnName + "\t");
            }
            sr.Append("\r\n");

            foreach (DataRow dr in dt.Rows)
            {
                foreach (object obj in dr.ItemArray)
                {
                    sr.Append(obj.ToString() + "\t");
                }
                sr.Append("\r\n");
            }

            //文本输出为csv个数，可用excel直接打开
            Response.Clear();
            Response.Buffer = true;
            Response.Charset = "gb2312";
            //定义为为附件下载
            Response.AppendHeader("Content-Disposition", "attachment;filename=\"" + HttpUtility.UrlEncode("统计报表_", System.Text.Encoding.UTF8) + DateTime.Now.ToString("yyyyMMdd-HHmmss-ffffff") + ".xls\"");
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
            Response.ContentType = "application/ms-excel";
            this.EnableViewState = false;
            //文本输出
            System.IO.StringWriter strWriter = new System.IO.StringWriter();
            strWriter.Write(sr.ToString());
            strWriter.Flush();
            //System.Web.UI.HtmlTextWriter htmlWriter = new System.Web.UI.HtmlTextWriter(strWriter);
            //this.RenderControl(htmlWriter);
            Response.Write(strWriter.ToString());
            Response.End();
        }
    }
}

 

点击下载：源码