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DataKey problem in grid with hierarchy

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Torben Frølund
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Torben Frølund asked on 25 Nov 2008, 03:16 PM
Has anyone experienced problems with DataKeys in grids hierachical grids? I have a grid somewhat like this:

Role1
 - User1
 - User2
Role2
 - User2
 - User4
Role 3
 - User1

On the parent level I have a column with a LinkButton and in the ItemCommand event I want to get the DataKey value for the row (eg. "RoleId1") when the button is pressed. This works fine until I click a role and and exand to see users. If I click Role1 row button the detail view is expaned and data is fetched for the details view. In the ItemCommand event I can get the DataKey for Role1, but if I subsequently click the button on Role2 or Role3 their DataKey is missing and when I look into the Item object its seems as though the item is one of their siblings.

Hope somebody has a clue, thanks in advance!

        <telerik:RadGrid id="uiRoleSummaryRadGrid" runat="server" allowsorting="True" width="95%"
            cssclass="GVTableLayout3" skin="" enableajax="True" showfooter="True" allowpaging="True"
            allowmultirowselection="True" gridlines="None" autogeneratecolumns="false" onitemcommand="uiRoleSummaryRadGrid_ItemCommand"
            ondetailtabledatabind="uiRoleSummaryRadGrid_DetailTableDataBind"
            onneeddatasource="uiRoleSummaryRadGrid_NeedDataSource" Font-Size="Medium"
            ForeColor="Red">
            <PagerStyle Mode="NumericPages"></PagerStyle>
            <MasterTableView DataKeyNames="Id,Name">
                <DetailTables>
                    <telerik:GridTableView DataKeyNames="ProfileUserId,ContactFullName" Name="UserDetails" Width="100%">
                        <RowIndicatorColumn Visible="False">
                            <HeaderStyle Width="20px"></HeaderStyle>
                        </RowIndicatorColumn>
                        <ExpandCollapseColumn Visible="False" Resizable="False">
                        <HeaderStyle Width="20px"></HeaderStyle>
                        </ExpandCollapseColumn>
                        <Columns>
                            <telerik:GridTemplateColumn UniqueName="ContactFullName" HeaderText="UserName" SortExpression="ContactFullName"
                            HeaderButtonType="LinkButton" SortAscImageUrl="~/SelfServiceB2B/Test/Images/asc.gif"
                            SortDescImageUrl="~/SelfServiceB2B/Test/Images/desc.gif" ItemStyle-ForeColor ="Black" >
                            <ItemTemplate>
                                <asp:LinkButton ID="uiViewRoleNameLinkButton" runat="server" Text='<%# Eval("ContactFullName") %>'
                                    CommandName="ViewUser" CommandArgument='<%# Eval("ProfileUserId") %>' ></asp:LinkButton>
                            </ItemTemplate>
                            <ItemStyle ForeColor="Black"></ItemStyle>
                            </telerik:GridTemplateColumn>
                        </Columns>

                        <EditFormSettings>
                            <PopUpSettings ScrollBars="None"></PopUpSettings>
                        </EditFormSettings>
                    </telerik:GridTableView>
                </DetailTables>
                <RowIndicatorColumn Visible="False">
                    <HeaderStyle Width="20px"></HeaderStyle>
                </RowIndicatorColumn>
                <ExpandCollapseColumn Resizable="False">
                <HeaderStyle Width="20px"></HeaderStyle>
                </ExpandCollapseColumn>
                <Columns>
                    <telerik:GridTemplateColumn UniqueName="Name" HeaderText="Role" SortExpression="Name"
                        HeaderButtonType="LinkButton" SortAscImageUrl="~/SelfServiceB2B/Test/Images/asc.gif"
                        SortDescImageUrl="~/SelfServiceB2B/Test/Images/desc.gif">
                        <ItemTemplate>
                            <asp:LinkButton ID="uiViewRoleLinkButton" runat="server" Text='<%# Eval("Name") %>'
                                CommandName="ViewRole"></asp:LinkButton>
                        </ItemTemplate>
                    </telerik:GridTemplateColumn>
                    <telerik:GridButtonColumn ButtonType=PushButton Text = "Edit" UniqueName="ID"
                        HeaderText="Edit" CommandName="EditRole" HeaderButtonType="LinkButton">
                    </telerik:GridButtonColumn>
                    <telerik:GridButtonColumn ButtonType=PushButton Text = "Show Id" UniqueName="ID"
                        HeaderText="Delete" CommandName="DeleteRole" HeaderButtonType="LinkButton">
                    </telerik:GridButtonColumn>
                </Columns>
                <EditFormSettings>
                    <PopUpSettings ScrollBars="None"></PopUpSettings>
                </EditFormSettings>
            </MasterTableView>
            <PagerStyle PageButtonCount="5" AlwaysVisible="true" Mode="NextPrevAndNumeric" HorizontalAlign="Center" Position="Bottom" ShowPagerText="false" />
        </telerik:RadGrid>



        protected void uiRoleSummaryRadGrid_ItemCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)
        {
            try
            {
                switch (e.CommandName)
                {
                    case "DeleteRole":
                        {

                            Telerik.Web.UI.GridDataItem item = uiRoleSummaryRadGrid.Items[e.Item.ItemIndex];

                            if (null != item.GetDataKeyValue("Id"))
                            {
                                uiResultLabel.Text = "Role Id" + item.GetDataKeyValue("Id").ToString() ;
                            }
                            else
                            {
                                if (null != item.GetDataKeyValue("ProfileUserId"))
                                {
                                    uiResultLabel.Text = "Error while get data key value for Id, but actual key value is " + item.GetDataKeyValue("ProfileUserId").ToString();
                                }
                                else
                                {
                                    uiResultLabel.Text = "Error while get data key values";
                                }
                              
                            }
                        }
                        break;
                }
            }
            catch (Exception ex)
            {

            }
        }

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Vlad
Telerik team
answered on 25 Nov 2008, 03:34 PM
Hello Michael,

Please try e.Item.ItemIndexHierarchical instead. The grid Items collection is hierarchical.

All the best,
Vlad
the Telerik team

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Torben Frølund
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Vlad
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