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Trying to get a Heiarchy grid to update the nested grid

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jms
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jms asked on 01 Jul 2010, 08:43 PM
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

2 Answers, 1 is accepted

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Radoslav
Telerik team
answered on 07 Jul 2010, 09:16 AM
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
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jms
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answered on 18 Aug 2010, 10:33 PM
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
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jms
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Radoslav
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jms
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