[Solved] Bug - Defining aggregates in RadGridView is dependent on order?

[Rob]

I have discovered a problem with the RadGridView.  Please see the attached picture.  Notice that the order of the ".Columns" property and the ".GroupDescriptors" property (in XAML, but also when defined in code behind) seems to break whether or not the totals are displayed...

And my XAML:

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    x:Class="SilverlightApplication139.MainPage"
    Width="800" Height="600">

    <Grid x:Name="LayoutRoot" Background="White" DataContext="{Binding Source={StaticResource SampleDataSource}}">

        <Grid.RowDefinitions>
            <RowDefinition Height="1*" />
            <RowDefinition Height="20" />
            <RowDefinition Height="1*" />
        </Grid.RowDefinitions>

        <telerik:RadGridView Grid.Row="0" ItemsSource="{Binding Collection}" AutoGenerateColumns="False" ShowColumnFooters="True" ShowGroupFooters="True">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn Header="P1" DataMemberBinding="{Binding Property1}" />
                <telerik:GridViewDataColumn Header="P2" DataMemberBinding="{Binding Property2}" />
                <telerik:GridViewDataColumn Header="P3" DataMemberBinding="{Binding Property3}">
                    <telerik:GridViewDataColumn.AggregateFunctions>
                        <telerik:SumFunction Caption="Total:" SourceField="Property3" />
                    </telerik:GridViewDataColumn.AggregateFunctions>
                </telerik:GridViewDataColumn>
            </telerik:RadGridView.Columns>
            <telerik:RadGridView.GroupDescriptors>
                <telerik:GroupDescriptor Member="Property2" DisplayContent="P2" />
            </telerik:RadGridView.GroupDescriptors>
        </telerik:RadGridView>

        <telerik:RadGridView Grid.Row="2" ItemsSource="{Binding Collection}" AutoGenerateColumns="False" ShowColumnFooters="True" ShowGroupFooters="True">
            <telerik:RadGridView.GroupDescriptors>
                <telerik:GroupDescriptor Member="Property2" DisplayContent="P2" />
            </telerik:RadGridView.GroupDescriptors>
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn Header="P1" DataMemberBinding="{Binding Property1}" />
                <telerik:GridViewDataColumn Header="P2" DataMemberBinding="{Binding Property2}" />
                <telerik:GridViewDataColumn Header="P3" DataMemberBinding="{Binding Property3}">
                    <telerik:GridViewDataColumn.AggregateFunctions>
                        <telerik:SumFunction Caption="Total:" SourceField="Property3" />
                    </telerik:GridViewDataColumn.AggregateFunctions>
                </telerik:GridViewDataColumn>
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>

    </Grid>

</UserControl>

[Rob]

Sorry forgot to mention.... we're using build '2010.3.1213.1040'

[Maya]

Hi Rob,

Indeed, you are quite correct. I have logged the issue in our Public Issue Tracking System. You may follow its progress either by its ID - 4383 or directly through this link. 
Thank you for reporting this. I hope it is not a problem for you to define the GroupDescriptor after the definition of the columns. I have updated your Telerik points accordingly.
 

All the best,
Maya
the Telerik team