DisplayFormat and ApplyFormatInEditMode

[CHRISTIAN]

Hi,

I´ve bound a Property like this:

[DisplayFormat(DataFormatString = "{0:F0}", ApplyFormatInEditMode = true, ConvertEmptyStringToNull = false, NullDisplayText = "0")]
decimal value{ get; set; }

to a GridViewDataColumn like this:

<telerik:GridViewDataColumn DataMemberBinding="{Binding Value}" Header="Value"/>

but in Edit Mode it shows to decimal places.
Why is "ApplyFormatInEditMode" not working?

[Maya]

Hello CHRISTIAN,

Indeed, the string format is not applied in edit mode. If otherwise, the whole editing for that specific column might be broken. Unfortunately, there are quite many possible scenarios that may lead to damaging the functionality if such support is added. However, we will definitely consider introducing such a feature if being appropriate. 
A possible workaround would be to define a CellEditTemplate and set the StringFormat for the Binding:

<telerik:GridViewDataColumn DataMemberBinding="{Binding StadiumCapacity}"
                                        Header="Stadium">
                <telerik:GridViewDataColumn.CellEditTemplate>
                    <DataTemplate>
                        <TextBox Text="{Binding StadiumCapacity, StringFormat=\{0:F0\}, Mode=TwoWay}" />
                    </DataTemplate>
                </telerik:GridViewDataColumn.CellEditTemplate>
            </telerik:GridViewDataColumn>

Still, whether this solution is appropriate depends entirely on your specific scenario and it is up to you to decide whether it fits into your requirements. 
Do let me know in case you need any further assistance.

All the best,
Maya
the Telerik team