Modify Grouping Header

[Marcus]

Hi All,
I have a grid with drag to-group enabled. One of the columns is a template field. The data coming from the DB is a binary mask which I'm "translating" in code-behind to "human-readable" format.
Everything works, but when the grid is grouped by the template field, the group header (obviously) displays the raw data (the binary mask). Is there a way to modify the header display? There's an 'OnGroupsChanging' event, but I can't find the correct property to modify.

Thx in advance.
Rgds - M.

Template Field:

<telerik:GridTemplateColumn SortExpression="MATCH" HeaderText="Match"
                                HeaderButtonType="TextButton"
                                UniqueName="Match" DataField="MATCH"
                                GroupByExpression="MATCH Group By MATCH">
    <ItemTemplate>
        <asp:Label ID="lblMatchColumn" runat="server" Text='<%# GetMatchCodes(Eval("MATCH").ToString()) %>' />
    </ItemTemplate>
</telerik:GridTemplateColumn>

[Marcus]

Ah, found it -> GroupHeaderTemplate

But it seems if I use the GroupHeaderTemplate I have to define it for every Group-enabled column - correct?


Edit: so I guess I need to check for null values, otherwise I get null-references. That's a lot of spaghetti-code in markup. Is there a better way of doing this?

[Pavlina]

Hi Marcus,

For more information about how to modify grid GroupHeaderItem you can refer to the article below:
http://www.telerik.com/help/aspnet-ajax/grid-customize-gridgroupheaderitem.html

Regards,
Pavlina
Telerik