Specify the display format for the property

[TechInsights]

Hello everyone,

Is it possible to specify the display format for a property in the PropertyGrid?

I've tried the [DisplayFormat], but neither DataFormatString nor NullDisplayText seems to be making any difference whatsoever.

In my particular case, I want the DateTime property to be displayed as 'yyyy - MM - dd', but (as I mentioned), decorating the property with [DisplayFormat(DataFormatString = "yyyy - MM - dd")] doesn't work.

As far as I have noticed, PropertyGrid selects RadDateTimePicker for DateTime types by default, but for some dates I'd like the 'date' part only. I don't care much about editing (although that would be nice too), but it would be great to adjust the display for read-only property grids.

Is there any way to make that work?

(Controls version used: 2013.2.724)

[Maya]

Hello,

The thing is that string format of the binding should be set differently in RadDateTimePicker (the default editing element for DateTime properties). Check out this article for a reference.  What you can try is to define the property definition like: 

<telerik:RadPropertyGrid.PropertyDefinitions>
                <telerik:PropertyDefinition Binding="{Binding Established, StringFormat=\{0:MM/dd/yyyy\}}"  IsReadOnly="True">
                    <telerik:PropertyDefinition.EditorTemplate>
                        <DataTemplate>
                            <telerik:RadDatePicker SelectedDate="{Binding Established}" IsReadOnly="{Binding IsReadOnly}"/>
                        </DataTemplate>
                    </telerik:PropertyDefinition.EditorTemplate>
                </telerik:PropertyDefinition>
            </telerik:RadPropertyGrid.PropertyDefinitions>

Is that approach suitable for your sceanrio ?

Regards,
Maya
Telerik

[TechInsights]

I didn't want to specify separate XAML views for property grids, but to re-use one auto-generated property grid view I have.

Your link pointed me in the right direction though, thanks!

I ended up hooking to OnFieldLoaded of the grid and checking the content. Then I get to the 'Binding.StringFormat' and set the DateTimeFormat in the CultureInfo of the date picker. It's a hack, but it works...

[Roman]

Hi,

is there a way to provide this format definition as Data Annotation? [DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}")] does not work ...

Regards

[Roman]

Achieved the expected behaviour with [Telerik.Windows.Controls.Data.PropertyGrid.Editor(typeof(RadDatePicker), "SelectedValue")]

 

:-)

[declan]

This might be done by subscribing to the RadPropertyGrid's  AutoGeneratingPropertyDefinition event in the constructor of ones UserControl like so:

        PropertyGrid1.AutoGeneratingPropertyDefinition += PropertyGrid1_AutoGeneratingPropertyDefinition;

 

      private void PropertyGrid1_AutoGeneratingPropertyDefinition(object sender,
         Telerik.Windows.Controls.Data.PropertyGrid.AutoGeneratingPropertyDefinitionEventArgs e)
      {
         if (e.PropertyDefinition.Binding is Binding binding && e.PropertyDefinition.SourceProperty.PropertyType == typeof(DateTime))
         {
            binding.StringFormat = "'yyyy - MM - dd";
         }
      }

N.B also works for other types (e. g double)