获取gridview前台特定行label绑定的值

protected void LinkBtnDelete_Click(object sender, EventArgs e)
    {
        //取得当前点击的LinkButton按钮
        LinkButton btn = (LinkButton)sender;
        //取得当前点击linkbutton按钮的所在行
        GridViewRow irow = (GridViewRow)btn.NamingContainer;
        //在当前点击linkbutton按钮的行找到label
        Label lbltag = (Label)irow.Cells[0].FindControl("Label1");
        //将label的值赋值于变量tbtag
        string tbtag = lbltag.Text.Trim();
        Conndb.Conndb conn = new Conndb.Conndb();
        conn.Open();
        string[] Sql = new string[1];
        Sql[0] = string.Format("delete from News where NewsId={0}", tbtag);

        int i = conn.ExeSql(Sql);
        if (i == 1)
        {
            Response.Write("<script>alert('删除成功');</script>");
            this.GridTitle.DataSource = Methed.datasetNew();
            this.GridTitle.DataBind();
        }
        else
        {
            Response.Write("<script>alert('删除失败');</script>");
        }
    }