NestedViewTemplate with HierarchyLoadMode="ServerOnDemand"

[jan]

Hello,

I have a grid with NestedViewTemplate and even though the parent MasterTableViews HierarchyLoadMode is set to "ServerOnDemand", it behaves like if it was "ServerSide".

For the following (simplified) code:

<

 

MasterTableView autogeneratecolumns="False" datakeynames="IdCustomer"

 

 

datasourceid="ObjectDataSource1" HierarchyLoadMode="ServerOnDemand">

 

 

 

<NestedViewTemplate>

 

 

<fieldset style="padding:10px;">

 

 

<legend style="padding:5px;"><b>Details:</b>

 

 

</legend>

 

 

 

<asp:HiddenField ID="ctl_hiddenId" runat="server" Value='<%# Eval("IdCustomer") %>' />

 

 

 

 

 

<asp:ObjectDataSource

 

 

ID="ctl_DetailObjectDataSource" runat="server" SelectMethod="GetDetail"

 

 

TypeName="DataModel.DetailDataSource">

 

 

<SelectParameters>

 

 

<asp:ControlParameter ControlID="ctl_hiddenId" DefaultValue="" Name="IdCustomer"

 

 

PropertyName="Value" Type="String" />

 

 

</SelectParameters>

 

 

</asp:ObjectDataSource>

 

 

 

<table style="width: 100%;">

 

 

<tr>

 

 

<td>

 

//something here

 

</td>

 

 

<td>

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td colspan="2">

 

 

<asp:ListView ID="ctl_photoListView" runat="server" DataSourceID="ctl_DetailsObjectDataSource">

 

 

<LayoutTemplate>

 

 

<ul class="ThumbnailsList">

 

 

<asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder>

 

 

</ul>

 

 

</LayoutTemplate>

 

 

 

<ItemTemplate>

 

 

<li>

 

 

 

//something here

 

 

</li>

 

 

</ItemTemplate>

 

 

</asp:ListView>

 

 

 

</td>

 

 

</tr>

 

 

<tr>

 

 

<td colspan="2">

 

//

 

</td>

 

 

</tr>

 

 

</table>

 

 

</fieldset>

 

 

</NestedViewTemplate>
//columns

 

</

 

MasterTableView>


It calls the GetDetail method for each row on the initial loading of whole grid (the method is called two times for each row in grid - could it be somehow set to be colled just once), and then on expanding nested template there is no more calling of this metode of the object data source.
 I need to call selecting method of my object data source only when expanding nested template - is there something else that I need to set?

Thank you
Jan

 

[Pavlina]

Hi Jan,

For more information about how to have a structure resembling a standard hierarchy, which can be greatly customized, without setting hierarchical relations between the master and detail levels, refer to the following resources:
Hierarchy with Templates 
NestedView template

Best wishes,
Pavlina
the Telerik team

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