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ReadOnly Property is not updating....

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Wasif Jahangir
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Wasif Jahangir asked on 13 Jul 2010, 11:59 AM
i have a "total" readonly field in my collection.
and it depends upon three other fields (quantity, Unit price, discount)
upon changing of any of these values i can see in debugging that the total property also changing,
but that is not reflecting in Grid Column of Total.
how to reflect the new value instantantly
however i have a simple Aggregate sum function in bottom which updating fine. but not the total Column field.

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Rossen Hristov
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answered on 13 Jul 2010, 12:02 PM
Hi Wasif Jahangir,

Does your business object implement INotifyPropertyChanged and do you raise it when it's needed?

Is it possible to send us a small dummy project that demonstrates this. We will debug it and see what is going on.

Thanks in advance.

Sincerely yours,
Ross
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Wasif Jahangir
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answered on 13 Jul 2010, 12:25 PM
sorry it would take me quite much time to create a sample however here some code snippet:

yes the collection have implemented INotifyPropertyChange interface.
here some code snippet.
foreach (Data.SupplierQuotationDetail detail in quotation.SupplierQuotationDetails)
{
               (detail as INotifyPropertyChanged).PropertyChanged += new PropertyChangedEventHandler(SupplierQuotation_PropertyChanged);
}

and in this event (SupplierQuotation_PropertyChanged) i can see the changes. and that collection (quotation.SupplierQuotationDetails) is bind to grid. but total field is not reflecting over there properly. do u have any sample for such case?
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Rossen Hristov
Telerik team
answered on 13 Jul 2010, 01:31 PM
Hi Wasif Jahangir,

I have prepared a sample project for you. There is a football club. It has columns for StadiumCapacity, TicketPrice and FullHouseProfit.

FullHouseProfit = StadiumCapacity * TicketPrice.

This is my calculated column.

Below the grid there is a button. Each time you click it, you will increase the ticket price of the stadium. You can clearly see how the FullHouseProfit is increased as a result of the ticket price change.

So everything works correctly. I event prepared a short video for you.

Could you please modify my sample project so that it reproduces the behavior that you are faced with.

Thanks in advance.

Regards,
Ross
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Wasif Jahangir
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Rossen Hristov
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Wasif Jahangir
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