Keyboard Navigation in WPF PropertyGrid control

7 May 20216 minutes to read

In this section, we will see available keyboard shortcuts and how to override the default navigation.

The following table explains how the navigation performed between properties,

S.No	Key	Description
1	Up	Selection will be moved from current property to previous property.
2	Down	Selection will be moved from current property to next property.
3	Home	Selection will be moved from current property to first property of the PropertyGrid.
4	End	Selection will be moved from current property to last property of the PropertyGrid.
5	Left	Selection will be moved from current property to previous property. When the property EnableGrouping is 'true' and the Header of the Category group is selected, and the group is expanded, then the Category group will be collapsed, and collapsed category group header remains selected.
6	Right	Selection will be moved from current property to next property. When the property EnableGrouping is true and the Header of the Category group is selected and the group is not expanded, then the Category group will be expanded, and expanded category group header remains selected.
7	Tab	When the PropertyName field is focused then the focus will be moved to value field and for next Tab key press, focus will move to next property Name field from current property Value field.
8	Esc	If the property’s value field is focused, then the focus has been moved to property’s name field.

Handling focus of the editors

By default, PropertyGrid will handle the keyboard navigation, so pressing keydown(Up and Down) will move the focus to next/previous editor from current editor. For all built-in editors, moving focus to next editor will be handled by PropertyGrid. For custom editors, property navigation (focus) will not happen if custom editor handles up or down key. To override keyboard navigation for custom editors, override ShouldPropertyGridTryToHandleKeyDown method from BaseTypeEditor.

For example, if you use ComboBox as custom editor, up and down key will be handled by it. So, property navigation will not happen. You can override ShouldPropertyGridTryToHandleKeyDown and return true, to allow property grid control to handle the key down events. When it returns false, the editor will handles the key down event.

C#
//Custom combobox editor
public class ComboBoxEditor : BaseTypeEditor {
    ComboBox enumCombo;
    public override void Attach(PropertyViewItem property, PropertyItem info) {
        var binding = base.CreatePropertyInfoBinding(info, enumCombo);
        BindingOperations.SetBinding(enumCombo, ComboBox.SelectedItemProperty, binding);
    }

    public override object Create(PropertyInfo PropertyInfo) {
        return this.CreateEditor(PropertyInfo.PropertyType);
    }

    public override object Create(PropertyDescriptor PropertyDescriptor) {
        return this.CreateEditor(PropertyDescriptor.PropertyType);
    }

    public override void Detach(PropertyViewItem property) {
        if (enumCombo != null) {
            BindingOperations.ClearAllBindings(enumCombo);
            BindingOperations.ClearBinding(enumCombo, ComboBox.SelectedItemProperty);
        }
        enumCombo.ItemsSource = null;
        enumCombo.Items.Clear();
        enumCombo = null;
    }

    public override bool ShouldPropertyGridTryToHandleKeyDown(Key key) {
        if (key == Key.Up || key == Key.Down) {
            return false;
        }

        return true;
    }

    /// <summary>
    /// Creates and initializes a new instance of the ComboBox editor.
    /// </summary>
    /// <param name="propertyType">The property type</param>
    /// <returns>The EnumComboEditor</returns>
    private ComboBox CreateEditor(Type propertyType)
    {
        enumCombo = new ComboBox() {
            ItemsSource = EnumHelper.GetValues(propertyType),
            BorderThickness = new Thickness(0)
        };
        return enumCombo;
    }
}

C#
//Person.cs
[Editor("Gender", typeof(ComboBoxEditor))]
public class Person {
    public Person() {
        FirstName = "Carl";
        LastName = "Johnson";
        Age = 30;
        Mobile = 91983467382;
        Email = "carljohnson@gta.com";
        ID = "0005A";
        DOB = new DateTime(1987, 10, 16);
        Gender = Gender.Male;
    }
    public Gender Gender { get; set; }
    public string Email { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string ID { get; set; }
    public DateTime DOB { get; set; }
    public long Mobile { get; set; }
    public int Age { get; set; }
}

public enum Gender {
    Male,
    Female
}

XAML
<syncfusion:PropertyGrid DefaultPropertyPath="Age"
                         SelectedPropertyItem="{Binding SelectedPropertyItem, Mode=TwoWay}">
    <syncfusion:PropertyGrid.SelectedObject>
        <local:Person />
    </syncfusion:PropertyGrid.SelectedObject>
</syncfusion:PropertyGrid>

NOTE

View Sample in GitHub.

Keyboard Navigation in WPF PropertyGrid

Keyboard Navigation between property items

Handling focus of the editors