SumFunction not working

[Jeffrey]

I'm trying to use the RadGridView AggregateFunctions. I've tested Count, Min and Max functions successfully. However, when I try using SumFunction or AverageFunction, nothing is displayed on the column footer (including the previously added Count, Min, Max functions).

I'm binding a DataTable to the grid from C# like this:

this.radGrid1.ItemsSource = dtData;

This is the XAML for the GridView:

<telerikGrid:RadGridView
            x:Name="radGrid1"
            MultipleSelect="True"
            AutoGenerateColumns="False"
            ShowColumnFooters="True" ShowGroupFooters="True">

            <telerikGrid:RadGridView.Columns>

                <telerikGrid:GridViewDataColumn Header="AccountNo" DataMemberBinding="{Binding AccountNo}">
                    <telerikGrid:GridViewDataColumn.AggregateFunctions>
                        <telerikData:CountFunction Caption="Count:" />
                    </telerikGrid:GridViewDataColumn.AggregateFunctions>
                </telerikGrid:GridViewDataColumn>

                <telerikGrid:GridViewDataColumn Header="InvestmentCost" DataMemberBinding="{Binding InvestmentCost}" DataFormatString="{}{0:c}" TextAlignment="Right">
                    <telerikGrid:GridViewDataColumn.AggregateFunctions>
                        <telerikData:SumFunction ResultFormatString="{}{0:c}" SourceField="InvestmentCost" />
                        <telerikData:MinFunction ResultFormatString="{}{0:c}" SourceField="InvestmentCost" />
                        <telerikData:MaxFunction ResultFormatString="{}{0:c}" SourceField="InvestmentCost" />
                    </telerikGrid:GridViewDataColumn.AggregateFunctions>
                </telerikGrid:GridViewDataColumn>

            </telerikGrid:RadGridView.Columns>
        </telerikGrid:RadGridView>

Edit: 

DataType for InvestmentCost column in dtData is Decimal.

I'm using RadControls for WPF Q3 2009 SP1

[Pavel Pavlov]

Hello Jeffrey Lewis,

I have tried to reproduce the problem here but with my test project it seems to work ok .
Please find the test project attached .  Maybe I am missing something to be able to  reproduce the problem ?

Regards,
Pavel Pavlov
the Telerik team

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[Jeffrey]

Thanks, got it to work following your example. The problem was I didn't put this in my SumFunction.

SourceFieldType="{x:Type s:Decimal}"