I'm having a problem in radtreelist and it isn't loading on page load
the radtreelist is inside a radmultipage the code is like this :
server side :
<
telerik:RadTabStrip
ID
=
"RadTabStrip1"
runat
=
"server"
MultiPageID
=
"RadMultiPage1"
SelectedIndex
=
"0"
ReorderTabsOnSelect
=
"true"
Align
=
"Justify"
Width
=
"220px"
>
<
Tabs
>
<
telerik:RadTab
Text="<%$Resources:Strings,Stores %>" >
</
telerik:RadTab
>
<
telerik:RadMultiPage
ID
=
"RadMultiPage1"
runat
=
"server"
Width
=
"100%"
>
<
telerik:RadPageView
ID
=
"StoresPageView"
runat
=
"server"
>
<
telerik:RadAjaxPanel
ID
=
"Ajpanel"
runat
=
"server"
>
<
telerik:RadTreeList
ID
=
"StoreTreeList"
runat
=
"server"
HideExpandCollapseButtonIfNoChildren
=
"true"
ParentDataKeyNames
=
"PARENT_STORE_ID"
DataKeyNames
=
"STORE_ID"
AllowPaging
=
"false"
GridLines
=
"Horizontal"
AutoGenerateColumns
=
"false"
AllowSorting
=
"true"
AllowMultiItemSelection
=
"true"
OnNeedDataSource
=
"StoreTreeList_NeedDataSource"
>
<
ItemStyle
HorizontalAlign
=
"Left"
/>
<
ClientSettings
><
Scrolling
UseStaticHeaders
=
"true"
AllowScroll
=
"true"
/> </
ClientSettings
>
<
Columns
>
<
telerik:TreeListSelectColumn
></
telerik:TreeListSelectColumn
>
<
telerik:TreeListTemplateColumn
Display
=
"false"
>
<
ItemTemplate
>
<
asp:HiddenField
ID
=
"hf_StoreID"
runat
=
"server"
Value='<%# Eval("STORE_ID") %>' />
</
ItemTemplate
>
</
telerik:TreeListTemplateColumn
>
<
telerik:TreeListBoundColumn
DataField
=
"STORE_NAME"
HeaderText
=
"Stores"
>
</
telerik:TreeListBoundColumn
>
</
Columns
>
</
telerik:RadTreeList
>
</
telerik:RadAjaxPanel
>
</
telerik:RadPageView
>
protected void StoreTreeList_NeedDataSource(object sender,TreeListNeedDataSourceEventArgs e)
{
BindTreeList();
}
private void BindTreeList()
{
StoresDT.Select("STORE_ID=" + new WebSiteDataHelper().SelectedStoreID.Value)[0]["PARENT_STORE_ID"] = 0;
StoreTreeList.DataSource = StoresDT;
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
StoreTreeList.ExpandAllItems();
}
}