ComboBox.IsReadOnly Property

Reference

Definition

Namespace:: System.Windows.Controls

Assembly:: PresentationFramework.dll

Important

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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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