ValuePattern.IsReadOnlyProperty 字段
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
标识 IsReadOnly 属性。
public: static initonly System::Windows::Automation::AutomationProperty ^ IsReadOnlyProperty;
public static readonly System.Windows.Automation.AutomationProperty IsReadOnlyProperty;
staticval mutable IsReadOnlyProperty : System.Windows.Automation.AutomationProperty
Public Shared ReadOnly IsReadOnlyProperty As AutomationProperty
字段值
示例
在下面的示例中,根元素传递给一个函数,该函数返回 UI 自动化元素的集合,这些元素是根的子代并满足一组属性条件。
///--------------------------------------------------------------------
/// <summary>
/// Finds all automation elements that satisfy
/// the specified condition(s).
/// </summary>
/// <param name="targetApp">
/// The automation element from which to start searching.
/// </param>
/// <returns>
/// A collection of automation elements satisfying
/// the specified condition(s).
/// </returns>
///--------------------------------------------------------------------
private AutomationElementCollection FindAutomationElement(
AutomationElement targetApp)
{
if (targetApp == null)
{
throw new ArgumentException("Root element cannot be null.");
}
PropertyCondition conditionIsReadOnly =
new PropertyCondition(
ValuePattern.IsReadOnlyProperty, false);
return targetApp.FindAll(
TreeScope.Descendants, conditionIsReadOnly);
}
'''--------------------------------------------------------------------
''' <summary>
''' Finds all automation elements that satisfy
''' the specified condition(s).
''' </summary>
''' <param name="targetApp">
''' The automation element from which to start searching.
''' </param>
''' <returns>
''' A collection of automation elements satisfying
''' the specified condition(s).
''' </returns>
'''--------------------------------------------------------------------
Private Function FindAutomationElement( _
ByVal targetApp As AutomationElement) As AutomationElementCollection
If targetApp Is Nothing Then
Throw New ArgumentException("Root element cannot be null.")
End If
Dim conditionIsReadOnly As New PropertyCondition( _
ValuePattern.IsReadOnlyProperty, False)
Return targetApp.FindAll(TreeScope.Descendants, conditionIsReadOnly)
End Function 'FindAutomationElement
注解
UI 自动化客户端应用程序使用此标识符。 UI 自动化提供程序应使用 中的 ValuePatternIdentifiers等效字段。
在客户端尝试调用 之前,控件应IsEnabledProperty将其设置为 true
,IsReadOnlyProperty并将其设置为 false
。SetValue