If the Editor property is not initialized, the PropertyGrid.EditorDefinitions collection will be consulted to determine the corresponding editor to display.

The priority of the definition keys to be used in order to find the appropriate editor for the property item is as follows:

1. The value provided by the PropertyItemBase.DefinitionKey property.

2. The value of the binding result of PropertyGrid.PropertyNameBinding applied on the underlying item.

3. The value type (e.g., value.GetType()) of the binding result of PropertyGrid.PropertyValueBinding applied on the underlying item. (A lookup based on a Type instance will recursively perform the look-up using base classes to find any matching editor definition.)

4. If PropertyGrid.PropertyValueBinding is null, the type of the underlying item. (A lookup based on a Type instance will recursively perform the look-up using base classes to find any matching editor definition.)

When no specific EditorDefinitionBase is found in the PropertyGrid.EditorDefinitions collection, the PropertyGrid will try to automatically create an appropriate editor based on the type of the value. (See default editors.)

If no appropriate editor is found, the EditorDefintionBase found in the PropertyGrid.DefaultEditorDefinition will be used.

Finally, if no editor is created, a TextBlock will be used to display the value.

The following is a list of the default editors that are automatically instantiated based on the type of the targeted property (when using SelectedObject[s]) or the type of the Value of the property (when using Properties or PropertiesSource).

- bool: CheckBox
- DateTime: DateTimeUpDown
- Color: ColorPicker
- decimal: DecimalUpDown
- double: DoubleUpDown
- float: SingleUpDown
- byte: ByteUpDown
- sbyte: SByteUpDown*
- short: ShortUpDown
- ushort: UShortUpDown*
- int: IntegerUpDown
- uint: UIntegerUpDown*
- long: LongUpDown
- ulong: ULongUpDown*
- enum: ComboBox with fields in the enumeration
- FontFamily: ComboBox populated with the available font families
- FontWeight: ComboBox populated with the possible font weights
- FontStyle: ComboBox populated with the possible font styles
- FontStretch: ComboBox populated with the possible font stretches

For CLS compliance, these editor are not available on the public API.

When using SelectedObject[s] only:
- object: TextBox
- TimeSpan: DateTimeUpDown using a converter
- IList<T>:
a) When T is one of the primitive type or a string: PrimitiveTypeCollectionControl
b) When T is NOT a primitive type or a string : CollectionEditor

These are the available built-in EditorDefintionBase-derived classes that allow you to easily customize the display the editor of the properties.

- EditorTemplateDefinition

- EditorComboBoxDefinition

- EditorCheckBoxDefinition

- EditorColorPickerDefinition

- EditorTextDefinition

- EditorDateTimeUpDownDefinition

- EditorByteUpDownDefinition

- EditorDecimalUpDownDefinition

- EditorDoubleUpDownDefinition

- EditorIntegerUpDownDefinition

- EditorLongUpDownDefinition

- EditorShortUpDownDefinition

- EditorSingleUpDownDefinition

Each editor definition has its own custom properties that allow you to easily customize the display of the represented editor. With the exception of EditorTemplateDefinition, they all provide the EditingElementStyle that allows you to style and get a more in-depth customizing scenario.

System.Object
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  System.Windows.Controls.Control
                     Xceed.Wpf.Toolkit.PropertyGrid.PropertyItemBase
                        Xceed.Wpf.Toolkit.PropertyGrid.CustomPropertyItem

Target Platforms: Windows 11, Windows 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

PropertyItemBase Members
Xceed.Wpf.Toolkit.PropertyGrid Namespace