GridView导出Excel

1 代码

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.Globalization;
using System.Data.OracleClient;
using System.IO;
using System.Text;

using Hhxx.App_Code.DatabaseOperate;
using Hhxx.App_Code.Database;
using Hhxx.App_Code.Common;
public partial class InterFace_Reports_QiYeJiBenQingKuang : System.Web.UI.Page
...{
    protected void Page_Load(object sender, EventArgs e)
    ...{
        if (!Page.IsPostBack)
        ...{

            // 初始化默认Gridview的SQL语句
            String querySql = "SELECT 建立日期,信息标题,发布部门,经办人,信息类型,关键字,阅读次数,审批结果,SN FROM xinxi WHERE ROWNUM<11";

            fillGridView(querySql);
        }

        // gridview 换行控制
        this.GridViewXinXiLan.Attributes.Add("style", "word-break:keep-all;word-wrap:normal");
    }

    /**//// <summary>
    /// 填充GridView
    /// </summary>
    private void fillGridView(String querySql)
    ...{
        DataSet ds = new DataSet();
        ds = GetData(querySql);

        // 清空以前的数据源
        GridViewXinXiLan.DataSource = null;

        // 将ds作为信息栏GridView的数据源
        GridViewXinXiLan.DataSource = ds;

        // 绑定数据
        GridViewXinXiLan.DataBind();

        // 保存数据源 防止丢失 VS的破Bug
        ViewState["GridViewXinXiLan_DataSource"] = GridViewXinXiLan.DataSource;
        // 保存SQL语句
        ViewState["sql"] = querySql;
    }

    /**//// <summary>
    /// 转换SQL查询结果为DataSet
    /// </summary>
    /// <returns>ds</returns>
    private DataSet GetData(String querySql)
    ...{
        String connStr = OracleHelper.DatabaseConnStr;

        // 创建数据集
        DataSet ds = OracleHelper.ExeSqlForDataSet(connStr, CommandType.Text, querySql, null);

        return ds;
    }

    /**//// <summary>
    /// 导出到Excel
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void ButtonExcel_Click(object sender, EventArgs e)
    ...{
        Response.ClearContent();

        Response.AddHeader("content-disposition", "attachment; filename=MyExcelFile.xls");

        Response.ContentType = "application/excel";

        StringWriter sw = new StringWriter();

        HtmlTextWriter htw = new HtmlTextWriter(sw);

        GridViewXinXiLan.RenderControl(htw);

        Response.Write(sw.ToString());

        Response.End();

    }

    public override void VerifyRenderingInServerForm(Control control)
    ...{

    }

}