RadGrid GridCalculated column aggregate - Sum is not supported for type "System.Object"

by ebarcza 10/10/2011 2:19:00 PM

When you try and aggregate a radgrid GridCalculatedColumn, you might encounter this error

Sum is not supported for type "System.Object"

 

 

to fix this error all you have to do is give the column a datatype - in my case it was  a decimal. the property setting for this is DataType="System.Decimal". See Example below:

<telerik:GridCalculatedColumn DataFields="SumOfNetRev,SumOfUESFee" DataType="System.Decimal"
                        FilterControlAltText="Filter NetTotal column" UniqueName="NetTotal"
                        DataFormatString="{0:c}"
                        Expression="{0}-{1}" HeaderText="Net Total" Aggregate="Sum" FooterAggregateFormatString="{0:c}">
                        <ItemStyle HorizontalAlign="right" />
                        <HeaderStyle HorizontalAlign="Right" />
                        <FooterStyle HorizontalAlign="Right" Font-Bold="true"/>
</telerik:GridCalculatedColumn>

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