PropertyCondition 构造函数

定义

命名空间:

System.Windows.Automation

程序集:

UIAutomationClient.dll

初始化 PropertyCondition 类的新实例。

重载

PropertyCondition(AutomationProperty, Object)	初始化 PropertyCondition 类的新实例。
PropertyCondition(AutomationProperty, Object, PropertyConditionFlags)	初始化 PropertyCondition 类的新实例，并使用标志。

PropertyCondition(AutomationProperty, Object)

初始化 PropertyCondition 类的新实例。

public:
 PropertyCondition(System::Windows::Automation::AutomationProperty ^ property, System::Object ^ value);

public PropertyCondition (System.Windows.Automation.AutomationProperty property, object value);

new System.Windows.Automation.PropertyCondition : System.Windows.Automation.AutomationProperty * obj -> System.Windows.Automation.PropertyCondition

Public Sub New (property As AutomationProperty, value As Object)

参数

property

AutomationProperty

要测试的属性。

value

Object

要测试属性的值。

示例

在以下示例中， PropertyCondition 指定要找到的 UI 自动化元素的控件类型 List为 。 PropertyCondition然后使用 从组合框中获取列表元素。

Condition propCondition1 = new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.List);
AutomationElement listElement = elementCombo.FindFirst(TreeScope.Children, propCondition1);

Dim propCondition1 As New PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.List)
Dim listElement As AutomationElement = elementCombo.FindFirst(TreeScope.Children, propCondition1)

注解

property 参数不能为 BoundingRectangleProperty。

PropertyCondition(AutomationProperty, Object, PropertyConditionFlags)

初始化 PropertyCondition 类的新实例，并使用标志。

public:
 PropertyCondition(System::Windows::Automation::AutomationProperty ^ property, System::Object ^ value, System::Windows::Automation::PropertyConditionFlags flags);

public PropertyCondition (System.Windows.Automation.AutomationProperty property, object value, System.Windows.Automation.PropertyConditionFlags flags);

new System.Windows.Automation.PropertyCondition : System.Windows.Automation.AutomationProperty * obj * System.Windows.Automation.PropertyConditionFlags -> System.Windows.Automation.PropertyCondition

Public Sub New (property As AutomationProperty, value As Object, flags As PropertyConditionFlags)

参数

property

AutomationProperty

要测试的属性。

value

Object

要测试属性的值。

flags

PropertyConditionFlags

影响比较的标志。

示例

以下示例使用 PropertyCondition 检索表示应用程序main形式的 Microsoft UI 自动化元素。 窗体通过不区分大小写的搜索来查找其字符串标识符。

/// <summary>
/// Find a UI Automation child element by ID.
/// </summary>
/// <param name="controlName">Name of the control, such as "button1"</param>
/// <param name="parentElement">Parent element, such as an application window, or the 
/// AutomationElement.RootElement when searching for the application window.</param>
/// <returns>The UI Automation element.</returns>
private AutomationElement FindChildElement(String controlName, AutomationElement rootElement)
{
    if ((controlName == "") || (rootElement == null))
    {
        throw new ArgumentException("Argument cannot be null or empty.");
    }
    // Set a property condition that will be used to find the main form of the
    // target application. In the case of a WinForms control, the name of the control
    // is also the AutomationId of the element representing the control.
    Condition propCondition = new PropertyCondition(
        AutomationElement.AutomationIdProperty, controlName, PropertyConditionFlags.IgnoreCase);

    // Find the element.
    return rootElement.FindFirst(TreeScope.Element | TreeScope.Children, propCondition);
}

''' <summary>
''' Find a UI Automation child element by ID.
''' </summary>
''' <param name="controlName">Name of the control, such as "button1"</param>
''' <param name="rootElement">Parent element, such as an application window, or the 
''' AutomationElement.RootElement when searching for the application window.</param>
''' <returns>The UI Automation element.</returns>
Private Function FindChildElement(ByVal controlName As String, ByVal rootElement As AutomationElement) _
    As AutomationElement
    If controlName = "" OrElse rootElement Is Nothing Then
        Throw New ArgumentException("Argument cannot be null or empty.")
    End If
    ' Set a property condition that will be used to find the main form of the
    ' target application. In the case of a WinForms control, the name of the control
    ' is also the AutomationId of the element representing the control.
    Dim propCondition As New PropertyCondition(AutomationElement.AutomationIdProperty, _
        controlName, PropertyConditionFlags.IgnoreCase)

    ' Find the element.
    Return rootElement.FindFirst(TreeScope.Element Or TreeScope.Children, propCondition)

End Function 'FindChildElement

另请参阅

• 客户端的 UI 自动化属性
• 获取 UI 自动化元素