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Cannot hide 'expand' indicator for nested tables with no items using SelfHierarchySettings

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Paul
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Paul asked on 17 Jul 2008, 01:58 AM
Using the below declarations ...

<telerik:RadGrid runat="server" id="grdClients"  
        OnNeedDataSource="grdClients_NeedDataSource" 
        OnItemCreated="grdClients_ItemCreated" 
        Skin="Default2006" 
        AutoGenerateColumns="False" 
        AllowPaging ="True" 
        AllowSorting="True" 
        PageSize="8"  
        GridLines="None"  
        ShowStatusBar="False" 
        Width="100%" > 
         
        <ExportSettings> 
            <Excel Format="Html" /> 
        </ExportSettings> 
         
        <PagerStyle Mode="NextPrevAndNumeric"></PagerStyle> 
             
        <ClientSettings AllowExpandCollapse="true" />  
     
        <MasterTableView DataKeyNames="Id, SuperClientId"
         
            <SelfHierarchySettings ParentKeyName="SuperClientId" KeyName="Id" MaximumDepth="0" /> 
               
            <Columns> 
                <telerik:GridHyperLinkColumn 
                    DataTextField="Id" 
                    DataTextFormatString="edit"  
                    UniqueName="colEditbasePage"  
                    DataNavigateUrlFormatString="editClient.aspx?id={0}"  
                    DataNavigateUrlFields="id"
                </telerik:GridHyperLinkColumn> 
                <telerik:GridHyperLinkColumn 
                    DataTextField="Id" 
                    DataTextFormatString="deactivate"  
                    UniqueName="colDeactivateClient"  
                    DataNavigateUrlFormatString="?deactivateid={0}"  
                    DataNavigateUrlFields="Id"
                </telerik:GridHyperLinkColumn> 
                 
                <telerik:GridBoundColumn 
                    DataField="CompanyName" 
                    DataType="System.String" 
                    HeaderText="Company Name" 
                    SortExpression="CompanyName" 
                    UniqueName="colCompanyName" > 
                </telerik:GridBoundColumn> 
                <telerik:GridBoundColumn 
                    DataField="City" 
                    DataType="System.String" 
                    HeaderText="City" 
                    SortExpression="City" 
                    UniqueName="colCity" > 
                </telerik:GridBoundColumn> 
                <telerik:GridBoundColumn 
                    DataField="Country" 
                    DataType="System.String" 
                    HeaderText="Country" 
                    SortExpression="Country" 
                    UniqueName="colCountry" > 
                </telerik:GridBoundColumn> 
                 
                <telerik:GridTemplateColumn HeaderText="Roles I fill"
                     <ItemTemplate> 
                        <table cellpadding="1" cellspacing="1" class="customTable"
                            <tr> 
                                <td style="width: 50%"
                                    <%# getRoleIndicator((int)DataBinder.Eval(Container.DataItem, "Id"), Settings.Default.role_clientCGC)%> 
                                </td> 
                                <td style="width: 50%"
                                    <%# getRoleIndicator((int)DataBinder.Eval(Container.DataItem, "Id"), Settings.Default.role_clientCC)%> 
                                </td> 
                            </tr> 
                        </table> 
                    </ItemTemplate> 
                </telerik:GridTemplateColumn> 
                 
                <telerik:GridBoundColumn 
                    DataField="NumOfRequestsBought" 
                    DataType="System.Int32" 
                    HeaderText="Number of Requests Purchased" 
                    SortExpression="NumOfRequestsBought" 
                    UniqueName="colNumOfRequestsBought" > 
                </telerik:GridBoundColumn> 
                <telerik:GridBoundColumn 
                    DataField="NumOfRequestsUsed" 
                    DataType="System.Int32" 
                    HeaderText="Number of Requests Used" 
                    SortExpression="NumOfRequestsUsed" 
                    UniqueName="colNumOfRequestsUsed" > 
                </telerik:GridBoundColumn> 
                 
                <telerik:GridCheckBoxColumn 
                    DataField="PurchasedApprovals" 
                    HeaderText="Purchased Approvals"  
                    AllowSorting="true" 
                    UniqueName="colPurchasedApprovals" > 
                </telerik:GridCheckBoxColumn> 
                <telerik:GridCheckBoxColumn 
                    DataField="PurchasedAgreements" 
                    HeaderText="Purchased Agreements"  
                    AllowSorting="true" 
                    UniqueName="colPurchasedAgreements" > 
                </telerik:GridCheckBoxColumn> 
                                     
            </Columns> 
        </MasterTableView> 
         
    </telerik:RadGrid> 


....  I've tried to programmatically hide the 'plus' sign next to top level nodes with no children nodes using this c# ....

public void Page_PreRenderComplete(object sender, EventArgs e) 
        { 
            HideExpandColumnRecursive(grdClients.MasterTableView); 
        } 
 
        public void HideExpandColumnRecursive(GridTableView tableView) 
        { 
            GridItem[] nestedViewItems = tableView.GetItems(GridItemType.NestedView); 
             
            foreach (GridNestedViewItem nestedViewItem in nestedViewItems) 
            { 
                foreach (GridTableView nestedView in nestedViewItem.NestedTableViews) 
                { 
                    if (nestedView.Items.Count == 0) 
                    { 
                        TableCell cell = nestedView.ParentItem["ExpandColumn"]; 
                        cell.Controls[0].Visible = false
                        nestedViewItem.Visible = false
                    } 
 
                    if (nestedView.HasDetailTables) 
                         
                        HideExpandColumnRecursive(nestedView); 
                    } 
                } 
            } 
        } 
 


Line 14 above ALWAYS indicates that the "nestedView.Items.Count" equals zero.  I know for a fact that some of the nodes have more than one item in their nested views.  I kn ow this because they show themselves when I comment out line 3 in the C#.

Any help would be greatly appreciated.

Paul

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Vlad
Telerik team
answered on 17 Jul 2008, 07:09 AM
Hello Paul,

You can set HierarchyLoadMode="ServerBind" to achieve this.

All the best,
Vlad
the Telerik team

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