數(shù)據(jù)服務(wù)控件的嵌套最主要的是是內(nèi)層控件數(shù)據(jù)的加載和事件的觸發(fā)。 DataList嵌套的重點(diǎn)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(shù)據(jù)源事件。下面以兩層DataList為例介紹下實(shí)現(xiàn)的過程。效果如下圖：
---------前臺(tái)html代碼-------
--------后臺(tái)cs代碼------
內(nèi)層控件數(shù)據(jù)綁定與事件聲明在外層的ItemDataBind中實(shí)現(xiàn)
- < 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(guān)內(nèi)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(tái)cs代碼------
內(nèi)層控件數(shù)據(jù)綁定與事件聲明在外層的ItemDataBind中實(shí)現(xiàn)
- 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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