Update value on lost focus in WPF PropertyGrid

7 May 20212 minutes to read

We can update the value of property item either immediately when the editor property changes or during the editor’s lost focus using UpdateSourceMode property of PropertyGrid. Values of UpdateSourceMode are Immediately, ReturnOrLostFocus. The default value is Immediately.

Binding modes

If the property UpdateSourceMode is Immediately, value of property item will be updated immediately when the editor property changes. Also, if the property UpdateSourceMode is ReturnOrLostFocus, value of property item will be updated only when editor lost its focus or when enter key is pressed.

XAML

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="0.6*"/>
        <ColumnDefinition Width="0.4*"/>
    </Grid.ColumnDefinitions>

    <syncfusion:PropertyGrid Margin="10" 
                             x:Name="propertyGrid"
                             UpdateSourceMode="ReturnOrLostFocus" 
                             SelectedObject="{Binding ElementName=button}" />
    
    <syncfusion:ButtonAdv  Name="button" 
                           Margin="10" 
                           Height="25" 
                           Width="200" 
                           Label="SelectedObject"
                           HorizontalAlignment="Center" 
                           VerticalAlignment="Center"
                           Grid.Column="1" 
                           syncfusion:SkinStorage.VisualStyle="Default" />
</Grid>

C#

propertyGrid.UpdateSourceMode = UpdateSourceMode.ReturnOrLostFocus;

The SelectedObject value changes immediately when the target element property changes, as shown below:

The SelectedObject value changes only when the target element lost its focus or when enter key is pressed, as shown below.