數據服務控件的嵌套最主要的是是內層控件數據的加載和事件的觸發。 DataList嵌套的重點是要在外層DataList的ItemDataBound事件中用e.Item.FindControl方法來找到嵌套層 DataList的id,編寫嵌套層DataList的綁定數據源事件。下面以兩層DataList為例介紹下實現的過程。效果如下圖：
---------前臺html代碼-------
--------后臺cs代碼------
內層控件數據綁定與事件聲明在外層的ItemDataBind中實現
- < asp:datalist id = "dlFileType" RepeatColumns = "2" runat = "server" >
- < ItemTemplate >
- < table border = "0" cellspacing = "0" cellpadding = "0" >
- < tr >
- < td width = "22%" height = "88" align = "center" valign = "top" >
- < img src = '<%#DataBinder.Eval(Container.DataItem,"cnvcPicURL")%>' width = "80" height = "80" >
- </ td >
- < td valign = "top" >
- < table width = "96%" border = "0" cellpadding = "0" cellspacing = "0" >
- < tr width = "100%" >
- < td colspan = "2" > < img src = '<%#PageBase.strStyleRoot+"/picture/pic_fwzn_08.gif"%>' height = "20" > < %#DataBinder.Eval(Container.DataItem,"cnvcTitle")% >
- < asp:Label id = "labFileType" runat = "server" Visible = False Text = '<%#DataBinder.Eval(Container.DataItem,"cniFileTypeID")%>' >
- </ asp:Label > </ td >
- </ tr >
- < tr >
- < td width = "300" >
- < asp:DataList id = "dlFileList" runat = "server" RepeatColumns = "1" Width = "100%" >
- < ItemTemplate >
- < TABLE cellSpacing = "1" cellPadding = "1" width = "100%" border = "0" >
- < tr >
- < td width = "7%" height = "20" align = "center" >
- < img src = '<%#PageBase.strStyleRoot+"/picture/pic_fwzn_dot.gif"%>' width = "3" height = "3" > </ td >
- < td width = "93%" >
- < font color = "#393939" >
- < %#GetTitle((string)Convert.ToString(DataBinder.Eval(Container.DataItem,"cnvcTitle")),(string)Convert.ToString(DataBinder.Eval(Container.DataItem,"cnvcFileType")),(string)Convert.ToString(DataBinder.Eval(Container.DataItem,"cniBaseFileID")),(DateTime)DataBinder.Eval(Container.DataItem,"cndtPublishTime"))% >
- </ font >
- </ td >
- </ tr >
- </ TABLE >
- </ ItemTemplate >
- </ asp:DataList >
- </ td >
- </ tr >
- < tr >
- < td colspan = "2" bgcolor = "E6E6E6" height = "1" > < img src = '<%#PageBase.strStyleRoot+"/picture/1X1.gif"%>' width = "1" > </ td >
- </ tr >
- < tr align = "center" >
- < td height = "22" colspan = "2" > < a href = "#" title = "可查看到更多相關內容" > < img src = '<%#PageBase.strStyleRoot+"/picture/more.gif"%>' width = "34" height = "11" border = "0" > </ a > </ td >
- </ tr >
- </ table >
- </ td >
- </ tr >
- </ table >
- </ ItemTemplate >
- </ asp:datalist >
--------后臺cs代碼------
內層控件數據綁定與事件聲明在外層的ItemDataBind中實現
- private void dlFileType_ItemDataBound( object sender,System.Web.UI.WebControls.DataListItemEventArgse)
- {
- if (e.Item.ItemType==ListItemType.Item||e.Item.ItemType==ListItemType.AlternatingItem)
- {
- DataListdl= null ;
- LabellabTypeID= null ;
-
- dl=(DataList)e.Item.FindControl( "dlFileList" )
- labTypeID=(Label)e.Item.FindControl( "lbFileType" );
- string typeID=labTypeID.Text.ToString();
- int iTypeID=Convert.ToInt32(typeID);
- string commandText= "select*fromtbfile" ;
- commandText=commandText+ "WhereTypeID=" +iTypeID;
- //------------
- string connString=ConfigurationSettings.AppSettings[ "dsn" ];
- SqlConnectionconn= new SqlConnection();
- conn.ConnectionString=connString;
- conn.Open();
- SqlDataAdaptermyCommand= new SqlDataAdapter(commandText,conn);
- DataSetds= new DataSet();
- myCommand.Fill(ds, "tbFile" );
- conn.Close();
- //------------
- dl.DataSource=ds.Tables[ "tbFile" ];;
- dl.DataBind();
- }
- }
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