ComboBox.IsReadOnly Property

Reference

Definition

Namespace:: System.Windows.Controls

Assembly:: PresentationFramework.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets a value that enables selection-only mode, in which the contents of the combo box are selectable but not editable.

public:
 property bool IsReadOnly { bool get(); void set(bool value); };

public bool IsReadOnly { get; set; }

member this.IsReadOnly : bool with get, set

Public Property IsReadOnly As Boolean

Property Value

Boolean

true if the ComboBox is read-only; otherwise, false. The default is false.

Examples

The following example shows a ComboBox with an editable TextBox. The IsReadOnly property is set to true, so the user cannot enter text into the TextBox.

<ComboBox Name="cb" Margin="10,10,3,3" Width="200" Height="30" Grid.Column="0" Grid.Row="2"         
          ItemsSource="{StaticResource myCities}" Text="My Cities"
          IsEditable="true"  IsReadOnly="true" 
          IsDropDownOpen="True" StaysOpenOnEdit="True">
</ComboBox>

Remarks

The IsEditable and IsReadOnly properties specify how the ComboBox behaves when the user does one of the following:

Enters a string to select an item in the ComboBox.
Enters a string that does not correspond to an item in the ComboBox.
Selects part of the string that is in the text box.
Copies or pastes a value into the text box.

The following table describes the actions the user can and cannot take, depending on the values of IsEditable and IsReadOnly.

	IsReadOnly is `true`	IsReadOnly is `false`
IsEditable is `true`	- Cannot select an item in the ComboBox by entering a string. - Cannot enter a string that does not correspond to an item in the ComboBox. - Can select part of the string in the ComboBox text box. - Can copy the string in the ComboBox text box, but cannot paste a string into the ComboBox text box.	- Can select an item in the ComboBox by entering a string. - Can enter a string that does not correspond to an item in the ComboBox. - Can select part of the string in the ComboBox text box. - Can copy or paste the string in the ComboBox text box.
IsEditable is `false`	- Can select an item in the ComboBox by entering a string. - Cannot enter a string that does not correspond to an item in the ComboBox. - Cannot select part of the string in the ComboBox. - Cannot copy or paste the string in the ComboBox.	- Can select an item in the ComboBox by entering a string. - Cannot enter a string that does not correspond to an item in the ComboBox. - Cannot select part of the string in the ComboBox. - Cannot copy or paste the string in the ComboBox.

When IsEditable is equal to false, the ComboBox uses a ContentPresenter to display the currently selected item; when IsEditable is equal to true, a TextBox is used for this purpose instead. Note that a TextBox only displays plain text, and that a ComboBoxItem may include non-plain text content, such as images.

Dependency Property Information

Item	Value
Identifier field	IsReadOnlyProperty
Metadata properties set to `true`	Inherits

Applies to

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