嵌套Repeater显示数据

    protected void Page_Load(object sender, EventArgs e)
    {
        string sqlcmd;
        sqlcmd = "select * from userinfo";
        Repeater1.DataSource = userSql.db.ExecuteDataview(sqlcmd);
        Repeater1.DataBind();
    }

    protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        ((Label)e.Item.FindControl("Label1")).Text = ((DataRowView)e.Item.DataItem).Row["Username"].ToString() + "<br />";

        string sqlcmd;
        string k;
        k = ((DataRowView)e.Item.DataItem).Row["Username"].ToString();
        sqlcmd = "select * from BlogArticle where username = @Username";
        SqlParameter[] param = {
                                   new SqlParameter("Username",k),
                               };
        Repeater Repeater2 = (Repeater)e.Item.FindControl("Repeater2");
        Repeater2.DataSource = userSql.db.ExecuteDataview(sqlcmd, param);
        Repeater2.DataBind();
    }