gridview 嵌套datalist问题

Question

GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        
        if (e.Row.RowIndex > -1)
        {
            dataclass dclass = new dataclass();
            #region 控件查找 读取值
            DataList dt = (DataList)e.Row.FindControl("datalist2");
            DataRowView row = (DataRowView)e.Row.DataItem;
            string mainID = row["partno"].ToString();
          
            string sqll = "select photo from tablingshi where partno='" + mainID + "'";
          
            #endregion
           ？？？ DataRow dr = dclass.dt(sqll, "srt").Rows[0];
           ？？？？ Response.Write(dr[0]);
           ？？？？ Response.End();
           
            #region 定义数组            string s = dr[0].ToString();
            Int32 t = s.Split(',').Length;
            string[] arrary = s.Split(',');            #endregion            #region 手动绑定内层的DATALIST            DataTable table = new DataTable();
            DataColumn column;
            DataRow rw;
            column = new DataColumn();
            column.DataType = Type.GetType("System.String");
            column.ColumnName = "name";
            table.Columns.Add(column);
            for (int i = 0; i < t; i++)
            {
                rw = table.NewRow();
                rw["name"] = arrary[i];
                table.Rows.Add(rw);
                Response.Write(arrary[0]);
               Response.End();            }            dt.DataSource = table;
            dt.DataBind();            #endregion
        }    }代码如上 ？？？这里怎么不执行哦 ？？？

Answer 1

dataclass(); public DataTable dt(string mysql,string tb)
    {
        DataSet ds = this.ds(mysql, tb);
        DataTable dtable = ds.Tables[tb];
        return dtable;
     }

Answer 2

做法不对，要找到控件，最起码要protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    { 
    //在这里你的操作
    }
}

Answer 3

比较简单的做法
<asp:GridView ID="GridView1" runat="server" DataSourceID="sdsProducts" AutoGenerateColumns="False" DataKeyNames="productid" >  
    <Columns>
        <asp:BoundField DataField="productName" /> 
        <asp:TemplateField>
            <ItemTemplate>
                <asp:DataList ID="DataList1" runat="server" DataSource='<%# GetPicture(Convert.ToInt32(Eval("productid"))) %>'>
                    <ItemTemplate>
                        <img src='<%# Container.DataItem %>' />
                    </ItemTemplate>
                </asp:DataList>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns> 
</asp:GridView> <asp:SqlDataSource ID="sdsProducts" runat="server" ConnectionString="Data Source=.\sqlexpress;Initial Catalog=Northwind;Integrated Security=True" ProviderName="System.Data.SqlClient" SelectCommand="select top 5 * from products" >
</asp:SqlDataSource>protected string []  GetPicture(int productid)
{ 
    //这里你应该根据你的id进行查询，返回一个string数组就可以了
    string [] str = new string[]{"1.jpg","2.jpg","3.jpg"};
    return str;
}