请问一下怎么获取datalist中的datalist控件

[fangfangok]

DataList1.DataSource=dl.myds();
DataList1.DataBind();

DataList dl2=DataList1.FindControl("DataList2");
dl2.DataSource=dl2.myds(); --------现在错误，没有把对象应用到对象实例??????
dl2.DataBind();

急呀

[阿云ivan]

因为
DataList dl2=DataList1.FindControl("DataList2"); //返回的dl2是null，也就是说，没找到DataList2控件

[编程有钱人了]

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if(!Page.IsPostBack)
        {
            this.ShowCategory();//绑定大类
        }
    }
    private void ShowCategory() 
    {
       this.DataList1.DataSource = GetTypeInfo.GetParentType();
       this.DataList1.DataKeyField = "Company_Category_id";
       this.DataList1.DataBind();     
    }
    protected void DataList1_ItemDataBound1(object sender, DataListItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            DataList dl = (DataList)e.Item.FindControl("DataList2");//获得控件的名称并转换成DataList类型
            dl.DataSource = GetTypeInfo.GetChildType(this.DataList1.DataKeys[e.Item.ItemIndex].ToString());
            dl.DataBind();
        }
    }
}

[koukoujiayi]

for (int i = 0; i < DataList1.Items.Count; i++)
{
DataList dl2 = (DataList)DataList1.Items[i].FindControl("DataList2");
dl2.DataSource=dl2.myds();
dl2.DataBind();
}
楼主试试!!