Getting attribute or GetDataKeyValue Problem OnNeedDataSource for a Listview inside other listview

[Cuneyt]

 I am trying to add a listview inside another listview itemtemplate. parent listview has openaccesslinqdatasource. inner listview has onneeddatasource. But i cant access any control custom attribute or parent GetDataKeyValue . There is old post here about it but no result avery time give me null. Thank you.
 basic structure.

***************---------------***************
<telerik:RadAjaxPanel ID="apCevapList" runat="server"
                                     ViewStateMode="Enabled"
                                     EnableViewState="true">

          <telerik:RadListView ID="lvParent" runat="server"
                                      DataKeyNames="CId"
                                      DataSourceID="OADLSParent"
                                      ViewStateMode="Enabled"
                                      EnableViewState="true"
                                      Skin="MetroTouch">
                                            <ItemTemplate>
                                                          <asp:HiddenField ID="hfCid2" runat="server" Value='<%# Eval("CId") %>' />
                                                          
                                                           <telerik:RadAjaxPanel ID="apCevapYorum" runat="server"
                                                                                ViewStateMode="Enabled" EnableViewState="true">
                                                    
                                                                        <telerik:RadListView ID="lvChild" runat="server"
                                                                                          DataKeyNames="Id"
                                                                                          EnableViewState="true"
                                                                                          ViewStateMode="Enabled"
                                                                                          InsertItemPosition="FirstItem"
                                                                                          AllowPaging="True"
                                                                                          PageSize="5"
                                                                                          Skin="Transparent"
                                                                                          OnNeedDataSource="lvChild_NeedDataSource"
                                                                                           OnItemCommand="lvChild_ItemCommand">
                                                                                         <ValidationSettings CommandsToValidate="PerformInsert"
                                                                                         ValidationGroup="insertGroup"
                                                                                         EnableValidation="true"></ValidationSettings>
                                                                       </telerik:RadListView>
                                                              </telerik:RadAjaxPanel>
                                                  </ItemTemplate>
                                 </telerik:RadListView>

</telerik:RadAjaxPanel>
***************---------------***************

Code behind something like that:

***************---------------***************
protected void lvChild_NeedDataSource(object sender, RadListViewNeedDataSourceEventArgs e)
{
RadListView lvChild = (RadListView)sender;
RadListViewDataItem parentItem = (RadListViewDataItem)lvChild.NamingContainer;

var parentDatakeyId = (int)parentItem.GetDataKeyValue("CId"); //This give me null exception
//OR
// this button is in itemtemplate of parent with custom attribute cId= '<%# Eval("CId") %>'
RadButton rb = (RadButton)parentItem.FindControl("btnShowChildLvInsertItem");
 int cId = Convert.ToInt32(rb.Attributes["cId"]);//null
//OR
 HiddenField hf = (HiddenField)parentItem.FindControl("hfCId");
string cId2 = hf.Value;//null
***************---------------***************

i can Access all cid value or other values in itemcommand event of child lv. but there is a problem  at needdatasource event of child listview. all cid null.
Thank you.

[Daniel]

Hello Cuneyt,

Posting multiple threads about the same question will make tracking the history of the ticket more complicated.
Please stick to the other thread: http://www.telerik.com/forums/getting-attribute-or-getdatakeyvalue-problem-onneeddatasource-for-a-listview-inside-other-listview-e8409596cc94
Thanks for your understanding.

Regards,
Daniel
Telerik