protected void 外层datalist_ItemDataBound(object sender, DataListItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) 
            {
                string keyid = this.dlServerFrame.DataKeys[e.Item.ItemIndex].ToString();
                DataList dls = (DataList)e.Item.FindControl("内嵌的datalistID");//先找到内嵌的
                if (dls != null) 
                {
                    //绑定吧        
                }
            }
        }

------解决方案--------------------
探讨

先绑定外层datalist这个很简单不用说了吧。 
内嵌的这样绑定 

C# code
protected void 外层datalist_ItemDataBound(object sender, DataListItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) 
            {
                string keyid = this.dlServerFrame.DataKeys[e.Item.ItemIndex].ToString();
                DataL…


------解决方案--------------------
DataList嵌套DataList的实现
http://blog.csdn.net/lee576/archive/2008/10/21/3119213.aspx