Trying to get a Heiarchy grid to update the nested grid

[jms]

Situation,
  I have a hierarchy grid where in the nested grid a link pops up a modal pop-up so the user can edit all of the contents of the object, the nested grid only shows a selected portion.  upon saving all is good except the nested grid, I cannot seem to figure out how to refresh it, unless I reload the entire page which I guess would work but not preferable.  would like to just refresh the nested grid but will settle for the whole grid if need be.


Aspx Code:

<asp:UpdatePanel ID="upnlGrid" runat="server" UpdateMode="Conditional">
<ContentTemplate>
    <telerik:RadGrid ID="UnitList" runat="server" AutoGenerateColumns="False"
        DataSourceID="UnitDataSource" GridLines="None"
         Skin="Windows7">
<MasterTableView datakeynames="Id" datasourceid="UnitDataSource">
    <DetailTables>
        <telerik:GridTableView runat="server" DataKeyNames="Id"
            CssClass="GridBackground">
            <RowIndicatorColumn>
                <HeaderStyle Width="20px" />
            </RowIndicatorColumn>
            <ExpandCollapseColumn>
                <HeaderStyle Width="20px" />
            </ExpandCollapseColumn>
            <Columns>
                <telerik:GridTemplateColumn DataField="Title" HeaderText="Title"
                    UniqueName="LTitle">
                    <ItemTemplate>
                        <asp:LinkButton ID="lbtnLTitle" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "Id")%>' runat="server" OnClick="lbtnLTitle_Click" Text='<%# DataBinder.Eval(Container.DataItem, "Title") %>'></asp:LinkButton>
                    </ItemTemplate>
                </telerik:GridTemplateColumn>
                <telerik:GridBoundColumn DataField="Presenter" HeaderText="Presenter"
                    UniqueName="LPresenter">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="Location" HeaderText="Location"
                    UniqueName="LLocation">
                </telerik:GridBoundColumn>
                <telerik:GridBoundColumn DataField="Hours" HeaderText="Hours"
                    UniqueName="LHours">
                </telerik:GridBoundColumn>
                <telerik:GridCheckBoxColumn DataField="IsActive" DataType="System.Boolean"
                    HeaderText="Active" UniqueName="LIsActive">
                </telerik:GridCheckBoxColumn>
            </Columns>
        </telerik:GridTableView>
    </DetailTables>
<RowIndicatorColumn>
<HeaderStyle Width="20px"></HeaderStyle>
</RowIndicatorColumn>
<ExpandCollapseColumn visible="True">
<HeaderStyle Width="20px"></HeaderStyle>
</ExpandCollapseColumn>
    <Columns>
        <telerik:GridTemplateColumn DataField="Title" HeaderText="Title"
            UniqueName="UTitle">
             <ItemTemplate>
                        <asp:LinkButton ID="lbtnUTitle" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "Id")%>' runat="server" OnClick="lbtnUTitle_Click" Text='<%# DataBinder.Eval(Container.DataItem, "Title") %>'></asp:LinkButton>
                    </ItemTemplate>
        </telerik:GridTemplateColumn>
        <telerik:GridBoundColumn DataField="OfferDept" HeaderText="Offer Dept."
            UniqueName="UOfferDept">
        </telerik:GridBoundColumn>
        <telerik:GridBoundColumn DataField="Semester" HeaderText="Semester"
            UniqueName="USemester">
        </telerik:GridBoundColumn>
        <telerik:GridBoundColumn DataField="Type" HeaderText="Type" UniqueName="UType">
        </telerik:GridBoundColumn>
        <telerik:GridBoundColumn DataField="StudentVuNetId" HeaderText="Student Id"
            UniqueName="UStudentVuNetId">
        </telerik:GridBoundColumn>
        <telerik:GridBoundColumn DataField="Hours" HeaderText="Hours"
            UniqueName="UHours">
        </telerik:GridBoundColumn>
        <telerik:GridCheckBoxColumn DataField="IsActive" DataType="System.Boolean"
            HeaderText="Active" UniqueName="UIsActive">
        </telerik:GridCheckBoxColumn>
    </Columns>
</MasterTableView>
    </telerik:RadGrid>
    <asp:ObjectDataSource ID="UnitDataSource" runat="server"
        SelectMethod="GetAllUnits"
        TypeName="Vanderbilt.CpmmProg.CommonUtils.UnitManagement">
    </asp:ObjectDataSource>
</ContentTemplate>
</asp:UpdatePanel>

C# Code:

protected void Page_Load(object sender, EventArgs e)
        {

            //attach the event to build the nested grid
            UnitList.DetailTableDataBind += new GridDetailTableDataBindEventHandler(UnitList_DetailTableDataBind);

            if (!Page.IsPostBack)
            {
                //do some stuff not related to grid at all
            }
        }


        protected void UnitList_DetailTableDataBind(object source, GridDetailTableDataBindEventArgs e)
        {
            int unitId = (int)e.DetailTableView.ParentItem.GetDataKeyValue("Id");
            e.DetailTableView.DataSource = UnitManagement.GetUnitLectures(unitId);
        }

        protected void lbtnLTitle_Click(object sender, EventArgs e)
        {
            int Id = Int32.Parse(((LinkButton)sender).CommandArgument.ToString().Trim());

            //TODO Get data for lecture, populate the updatePanel for editing lectures
            Lecture lec = LectureManagement.GetLecture(Id);
            tbTitle.Text = lec.Title;
            tbPresenter.Text = lec.Presenter;
            tbLocation.Text = lec.Location;
            tbHours.Text = lec.Hours.ToString();
            tbCourseAdminVuNetId.Text = lec.CourseAdminVuNetId;
            rdtpTime.SelectedDate = lec.DateAndTime;
            hfEditLecId.Value = lec.Id.ToString();
            cbIsActive.Checked = lec.IsActive;
            //TODO show modal popup.
            hfEditLectureDummy_ModalPopupExtender.Show();
        }



        protected void lbtnUTitle_Click(object sender, EventArgs e)
        {
             //redirect to another page
        }

        protected void btnEditCancel_Click(object sender, EventArgs e)
        {
            //hide the modal popup
            hfEditLectureDummy_ModalPopupExtender.Hide();
        }

        protected void btnEditSave_Click(object sender, EventArgs e)
        {
            //get the lecture
            //save the lecture to persistence

            //hide modal popup
            hfEditLectureDummy_ModalPopupExtender.Hide();

            //update the updatepanel
            upnlGrid.Update();
        }

thanks,
jms

[Radoslav]

Hello James,

You could try the following approach:

On RadGrid.ItemDataBound event handler you could store into the Session the updated item's OwnerTableView:

public GridTableView Item
{
     get
     {
         if(Session["GridTableView"] == null)
         {
             return null;
         }
         else
         {
             return (Session["GridTableView"] as GridTableView);
         }
     }
     set
     {
         Session["GridTableView"] = value;
     }
 }
void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
     if (e.Item.IsInEditMode)
     {
         Item = e.Item.OwnerTableView;
     }
}

Then on btnEditSave's click event you could rebind the nested table view:

protected void btnEditSave_Click(object sender, EventArgs e)
{
    //get the lecture
    //save the lecture to persistence

    //hide modal popup
    hfEditLectureDummy_ModalPopupExtender.Hide();

    //refresh the nested table view
    Item.Rebind();
}

I hope this helps

Regards,
Radoslav
the Telerik team

[jms]

Thanks for the solution, I did not think of doing that.  It worked just to let you know, but there wasa design change and  that was no longer needed.

jimm