Unable to find ChildItem of the parent grid

[MadhuSudhan]

Hi, I am facing a issue to find the ChildItem of the parent grid in ItemCreated event of Child grid after doing paging or filtering or sorting on parent grid.
Here is my code of OnNeedDataSource for Parent Grid :
public void GetInProcessData(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{
    EffortCertificationList effortCertifications = new EffortCertificationList();
    if (Session["IPEffortCertifications"] != null)
    {   effortCertifications = (EffortCertificationList)Session["IPEffortCertifications"];  }
    else
    {   effortCertifications.CurrEmployee = Session["currEmployee"].ToString();
        effortCertifications.Load("InProcess");
        Session["IPEffortCertifications"] = effortCertifications;
    }
   grdInProcess.DataSource = effortCertifications;
}

Here is my code of OnNeedDataSource for Child Grid which is in NestedViewTemplate :
protected void GetInProcesDetails(object source, GridNeedDataSourceEventArgs e)
{
                GridDataItem parentItem = ((source as RadGrid).NamingContainer as GridNestedViewItem).ParentItem as GridDataItem;
                string _employeeId = parentItem.GetDataKeyValue("Employee").ToString();
                Label lblBeginDate = (Label)parentItem.FindControl("lblIPStartDate");
                Label lblEndDate = (Label)parentItem.FindControl("lblIPEndDate");
                EffortCertificationList objeffortCertifications = new EffortCertificationList();
               if (Session["IPEffortCertifications"] != null)
               {
               objeffortCertifications = (EffortCertificationList)Session["IPEffortCertifications"];
               var effortDetails = from ec in objeffortCertifications
                                            where ec.Employee == _employeeId && ec.CertPeriodStartDate ==                                          Convert.ToDateTime(lblBeginDate.Text) && ec.CertPeriodEndDate == Convert.ToDateTime(lblEndDate.Text)
                                            select ec;
               EffortDetailList objEffortDetails = new EffortDetailList();
               foreach (var ed in effortDetails)
               {
                       objEffortDetails = ed.Details;
               }
               (source as RadGrid).AllowFilteringByColumn = false;
               (source as RadGrid).DataSource = objEffortDetails;
    }
 protected void grdInProcesDetails_ItemCreated(object sender, GridItemEventArgs e)
 {
       if (e.Item is GridDataItem)
       {
                GridDataItem item = (GridDataItem)e.Item;
                GridDataItem parentItem = ((sender as RadGrid).NamingContainer as GridNestedViewItem).ParentItem as GridDataItem;
                if (parentItem != null && parentItem.ChildItem !=null)
                {   string _employeeId = parentItem.GetDataKeyValue("Employee").ToString();
                    CheckBox chkIPReviewed = parentItem.ChildItem.FindControl("chkInProcessReviewed") as CheckBox;
                }
     }
}

Here in this event parentItem.ChildItem is null because of which i could not add attribute for calling javascript funcation for chkIPReviewed control. This is happening only after paging or sorting or filtering.
I am using client side function to expand or collapse for showing the Inner grid which is present in Nesstedviewtemplate.

Please provide me a solution.

Thanks in advance

[Marin]

Hello MadhuSudhan,

The approach you are using is correct but you have to make sure that the ParentItem is initialized in order to access it. The ItemCreated event might be called to early and the parent grid item might not be bound yet. Try using the ItemDataBound or some other later event (e.g. PagePreRender) where you are sure that the items are created and bound properly.

Kind regards,
Marin
the Telerik team

[MadhuSudhan]

Thank you very much for the reply..I was already able to solve the issue. Yes i tried using with Item_DataBound event but it was not successful, However when used Inner grid pre_render event i got my requirements fulfill.

Thank you once again for your response...