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Is it possible to hide the group member name in the group caption?

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GridView
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Kjell
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Kjell asked on 20 Apr 2011, 07:48 PM
I am following this example:

http://www.telerik.com/help/wpf/gridview-grouping-aggregates.html

The first group caption is:

"Argentina  Entries count: 1  First entry:  Patricio Simpson"

Is it possible not to show the "Argentina" part? So it's just  "Entries count: 1  First entry:  Patricio Simpson"

Secondly, but not as important, would be cool if instead of the FirstFunction just calling the "ToString()" method, if was possible to specify a field in your business object to display. 

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Vanya Pavlova
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answered on 21 Apr 2011, 07:58 AM
Hello Kjell,

 

You may achieve the desired result by predefining the GroupHeaderTemplate at a RadGridView level and assign it to an empty DataTemplate, as shown below:

<telerik:RadGridView ItemsSource="{Binding Collection}">
        <telerik:RadGridView.GroupHeaderTemplate>
            <DataTemplate>
                </DataTemplate>
            </telerik:RadGridView.GroupHeaderTemplate>
        <telerik:RadGridView.Columns>
            <telerik:GridViewDataColumn Header="P1" DataMemberBinding="{Binding Property1}">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction Caption="Count:"/>
                    </telerik:GridViewDataColumn.AggregateFunctions>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn Header="P1" DataMemberBinding="{Binding Property2}">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction Caption="Count:"/>
                    </telerik:GridViewDataColumn.AggregateFunctions>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn Header="P1" DataMemberBinding="{Binding Property1}">
                <telerik:GridViewDataColumn.AggregateFunctions>
                    <telerik:CountFunction Caption="Count:"/>
                    </telerik:GridViewDataColumn.AggregateFunctions>
                </telerik:GridViewDataColumn>
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>


Please let me know how this works for you!

Greetings,
Vanya Pavlova
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Kjell
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answered on 05 May 2011, 09:58 PM
Thanks, your answer got me down the right path.  My ultimate goal was to be able to group on a datetime, but then format the datetime to my liking in the group row.  I setup the template as you described, but I bound it to the group.key.  Then added the following handler for the textblock loaded event:

private void TextBlock_Loaded(object sender, RoutedEventArgs e)
  {
      TextBlock block = (TextBlock)sender;
      string text = block.Text;
      DateTime dt = System.Convert.ToDateTime(text);
      block.Text = dt.ToString("M/d/yy");
  }


Probably a bit goofy but gets the job done.
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Kjell
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answered on 05 May 2011, 10:50 PM
Ok one more update in case anyone else runs into this.  All I really needed to do is set

DataFormatString

 

 

="{}{0:d}"

 


So I ended up not using my previous solution.  DateFormatString will cover both grouping and filtering.
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Kjell
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answered on 08 May 2011, 08:10 PM
Another correct, setting the dateformat doesn't work if you have blank dates because they will show as "1/1/001".  I went back to my original solution so I could have more control over what is shown.

Now sure how I am going to deal with the filtering though.
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Kjell
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Vanya Pavlova
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Kjell
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