GridView数据导入Excel/Excel数据读入GridView?

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1.导出Excel:
页面增加一个按钮,单击事件添加如下方法:
protected void Button1_Click(object sender, EventArgs e)
{
        Export("application/ms-excel", "学生成绩报表.xls");
}private void Export(string FileType, string FileName)
{
        Response.Charset = "GB2312";
        Response.ContentEncoding = System.Text.Encoding.UTF7;
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
        Response.ContentType = FileType;
        this.EnableViewState = false;
        StringWriter tw = new StringWriter();
        HtmlTextWriter hw = new HtmlTextWriter(tw);
        GridView1.RenderControl(hw);
        Response.Write(tw.ToString());
        Response.End();
}
public override void VerifyRenderingInServerForm(Control control)
{
}

//如果没有下面方法会报错类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标记内
public override void VerifyRenderingInServerForm(Control control)
{
}


还有由于是文件操作所以要引入名称空间IO和Text
2.读取Excel:
private DataSet CreateDataSource()
{
        string strCon;
        strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("excel.xls") + "; Extended Properties=Excel 8.0;";
        OleDbConnection olecon = new OleDbConnection(strCon);
        OleDbDataAdapter myda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", strCon);
        DataSet myds = new DataSet();
        myda.Fill(myds);
        return myds;
}
protected void Button1_Click(object sender, EventArgs e)
{
        GridView1.DataSource = CreateDataSource();
        GridView1.DataBind();
}

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