[Solved] Aggrigation Function in Grid View not Work

[Ahmed]

I try Grid View Samples Demo (Totals):
http://demos.telerik.com/silverlight/#GridView/Totals

but When I try The Sample It Doesn't Work with me "Invalid Property or Field for Type : Entity"
and Where is The Function Defination "MinUnitPrice" 
        <telerik:SumFunction Caption="Sum: " ResultFormatString="{}{0:c}" SourceField="UnitPrice" />
        <telerik:AverageFunction Caption="Average: " ResultFormatString="{}{0:c}" SourceField="UnitPrice" />

[Maya]

Hi Ahmed,

Please roll on a bit more about the way you are reproducing this issue. Do you use the same settings like those in the demos ? What is the type of MinUnitPrice Property - is it of numeric type ? Which is the version you work with ?
 

Greetings,
Maya
the Telerik team

[Ahmed]

Yes The Same Settings
Yes Numeric
Q3 2010 Version
...............................
The Most Thing I want To Know is Where is The Code for That Function "MinUnitPrice" Where its Execution??
Thanks Maya And I hope That Help You

[Maya]

Hi Ahmed,

Using the example in our demos, I tried to reproduce the issue you specified.I am sending you the sample project I tested the problem on. Please take a look at it and share if there is some misunderstandings according to what you are doing. 
As for the MinUnitPrice function, it is the built-in MinFunction and the MinUnitPrice is the name set to this particular function so that it can be later used in the code-behind. In the sample project I attach, I am defining another FunctionName - MinStadiumCapacity.

Kind regards,
Maya
the Telerik team

[Ahmed]

Thanks Alot Maya for Your Help and Support