nullable types with CellEditTemplate : cannot change value to blank one

[LE DREAU Steeve]

Hi all,

I wanted to know why when I use celledittemplates within nullable types I can't change a value to a blank one and then validate it.
Here is an example :

<telerik:GridViewDataColumn Header="DataColumn avec templates" DataMemberBinding="{Binding Age}">
                    <telerik:GridViewDataColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Age}" />
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellTemplate>
                    <telerik:GridViewDataColumn.CellEditTemplate>
                        <DataTemplate>
                            <TextBox Text="{Binding Age, Mode=TwoWay}" />
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellEditTemplate>
                </telerik:GridViewDataColumn>

The Age property type is Integer? so I should be able to delete the Age value from the cell edit template and then validate the row. This cell should display a blank cell but the old value is still here.

Could you please help me to figure why there is this problem please ?
Thanks

Regards

Steeve

[Vanya Pavlova]

Hello Steeve,

 

Indeed the behavior you get is the expected one. I believe that it is related to the TextBox control rather than to RadGridView, you may read more about this here. Basically you may create a converter to convert all empty string to null and then it will work. 


Please find attached sample project that demonstrates this approach.

Regards,
Vanya Pavlova
the Telerik team

[LE DREAU Steeve]

Thanks for your answer, it's exactly that... I totally forgotten about the converter...
Sorry for this poor question ^^