Hi Steve:
Sorry about my poor description. I post simplified version of code here.
I have a customized control MyControl like

 public class MyControl : WebControl
 {
   private int nMyControlID;
   private string strImagePath;
   public int MyControlID
   {
     get
     {
       return nMyControlID;
     }
     set
     {
       nMyControlID = value;
     }
   }
   public string ImagePath
   {
     get
     {
       return strImagePath;
     }
     set
     {
       strImagePath = value;
     }
   }

   protected override void Render(HtmlTextWriter writer)
   {
     writer.RenderBeginTag(HtmlTextWriterTag.A);
     writer.RenderBeginTag(HtmlTextWriterTag.Div);

     writer.AddAttribute("src", ResolveUrl(ImagePath);
     writer.RenderBeginTag(HtmlTextWriterTag.Img);
     writer.RenderEndTag(); //img

     writer.RenderEndTag(); //div
     writer.RenderEndTag(); //a
   }
 }

And In my code I have

     List<MyControl> lstResult = new List<MyControl>();

     Database db = DatabaseFactory.CreateDatabase("MyDB");

     string sqlCommand = "dbo.usp_GetAllImageList";
     DbCommand dbCommand = db.GetStoredProcCommand(sqlCommand);

     using (DataSet ds = db.ExecuteDataSet(dbCommand))
     {
       foreach (DataRow dr in ds.Tables[0].Rows)
       {
         DataRowRecord drMyControl = new DataRowRecord(dr);

         MyControl obj = new MyControl();
         obj.MyControlID = DataUtil.GetIntValue(drMyControl,
"MyControlID");
         obj.ImagePath = DataUtil.GetStringValue(drMyControl, "ImagePath");

         lstResult.Add(obj);
       }
     }

   then I databind my list with the datalist like

datalist.datasource = lstResult;
datalist.databind():

the problem I have now is the datalist do create four customized controls.
but images do not display at all. I think the value is not bound to the
control.How can I solve this problem. Do I need to create another customized
databound list control for mycontrol?

Thanks a lot
Regards
Victor