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[Solved] Custom GridViewHeaderCellTemplate woes

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answered on 24 Jun 2009, 02:59 PM

Hello Tyree,

As for the editing of the template of the header cell there is a nice tutorial on how you can go about it here. As for the EditOtherStyles blend menu - we will consider implementing it in one of the weekly releases after Q2 hits the shelves.

As for the naming of the DataMemberBinding - we do not believe to be a big issue as long as it provides the same functionality.

Best wishes,
Kalin Milanov
the Telerik team

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answered on 28 Oct 2009, 09:16 PM

I basically have one of the same questions as Tyree but want to make the changes without using Blend.

I have altered the GridViewHeaderCell ControlTemplate in the XAML so that I can wrap the text. However, I have now lost the filtering and sorting icons (though the sorting functionality via click does still work). How do I restore the filter functionality & icon and the sort visualization in my style? Thanks. I currently have:

xmlns:tGridView="clr-namespace:Telerik.Windows.Controls.GridView;assembly=Telerik.Windows.Controls.GridView"

<Setter.Value>

<tGridView:AlignmentContentPresenter TextWrapping="Wrap" TextAlignment="Center" VerticalAlignment="Center" />

</ControlTemplate>

</Setter.Value>

</Setter>

</Style>

answered on 03 Nov 2009, 08:30 AM

Hi Tim,

In later versions of RadGridView for scenarios such as yours we have introduced some improvements.
The Header property of the column is of type object. By default it is a string and shows the header caption. However you may set it to any UI element. Header is rendered besides the sorting and filtering UI .This means you may customize the header , without affecting the whole header cell thus retaining basic column features ( sorting indicator and filtering funnel) .

The following XAML sets the header to a textbox :

<telerik:GridViewDataColumn DataMemberBinding="{Binding ID}" >

<telerik:GridViewDataColumn.Header>

<TextBlock Text="ID" />

</telerik:GridViewDataColumn.Header>

</telerik:GridViewDataColumn>

Now this thread indicates an old version 2008.1.526 . of the dlls. Please download some of the latest internal builds to able to use this approach. There is also an official Q3 release coming these days.

Kind regards,
Pavel Pavlov
the Telerik team

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answered on 03 Nov 2009, 03:00 PM

Hi, Pavel.

Thanks for your response. Shortly after I posted that message, I did find another thread that explained the new functionality and the convenience of the Header object. The change that I made worked perfectly for allowing the default filtering and sorting (actually, I HAD to make that change since the Q3 Beta 2 now creates an OnApplyTemplate() error with the old way of applying the custom HeaderCell template that I was doing before). However, it has caused other problems. Most notably, it appears that there is some odd behavior with regard to frozen columns and the height of those cell headers when I use the horizontal scroll.

I don't want to hijack this thread for that problem since I've already asked about it in another thread. if you would, please take a look at my post at the end of the thread HERE which is a follow-up message to someone else who also had to switch to the Header object due to the error in the Q3 Beta 2. If you think that providing my solution in the other thread might help you help me, please let me know.

Thanks!
-Tim