TextPattern.Pattern 字段

定义

标识 TextPattern 模式。Identifies the TextPattern pattern.

public: static initonly System::Windows::Automation::AutomationPattern ^ Pattern;
public static readonly System.Windows.Automation.AutomationPattern Pattern;
 staticval mutable Pattern : System.Windows.Automation.AutomationPattern
Public Shared ReadOnly Pattern As AutomationPattern 

字段值

示例

// Set up the conditions for finding the text control.
PropertyCondition documentControl = new PropertyCondition(
    AutomationElement.ControlTypeProperty,
    ControlType.Document);
PropertyCondition textPatternAvailable = new PropertyCondition(
    AutomationElement.IsTextPatternAvailableProperty, true);
AndCondition findControl =
    new AndCondition(documentControl, textPatternAvailable);

// Get the Automation Element for the first text control found.
// For the purposes of this sample it is sufficient to find the 
// first text control. In other cases there may be multiple text
// controls to sort through.
targetDocument =
    targetWindow.FindFirst(TreeScope.Descendants, findControl);

// Didn't find a text control.
if (targetDocument == null)
{
    targetResult.Content =
        WPFTarget +
        " does not contain a Document control type.";
    targetResult.Background = Brushes.Salmon;
    startWPFTargetButton.IsEnabled = false;
    return;
}

// Get required control patterns 
targetTextPattern =
    targetDocument.GetCurrentPattern(
    TextPattern.Pattern) as TextPattern;

// Didn't find a text control that supports TextPattern.
if (targetTextPattern == null)
{
    targetResult.Content =
        WPFTarget +
        " does not contain an element that supports TextPattern.";
    targetResult.Background = Brushes.Salmon;
    startWPFTargetButton.IsEnabled = false;
    return;
}
' Set up the conditions for finding the text control.
Dim documentControl As New PropertyCondition( _
AutomationElement.ControlTypeProperty, ControlType.Document)
Dim textPatternAvailable As New PropertyCondition( _
AutomationElement.IsTextPatternAvailableProperty, True)
Dim findControl As New AndCondition(documentControl, textPatternAvailable)

' Get the Automation Element for the first text control found.
' For the purposes of this sample it is sufficient to find the 
' first text control. In other cases there may be multiple text
' controls to sort through.
targetDocument = targetWindow.FindFirst(TreeScope.Descendants, findControl)

' Didn't find a text control.
If targetDocument Is Nothing Then
    targetResult.Content = _
    WPFTarget + " does not contain a Document control type."
    targetResult.Background = Brushes.Salmon
    startWPFTargetButton.IsEnabled = False
    Return
End If

' Get required control patterns 
targetTextPattern = DirectCast( _
targetDocument.GetCurrentPattern(TextPattern.Pattern), TextPattern)

' Didn't find a text control that supports TextPattern.
If targetTextPattern Is Nothing Then
    targetResult.Content = WPFTarget + _
    " does not contain an element that supports TextPattern."
    targetResult.Background = Brushes.Salmon
    startWPFTargetButton.IsEnabled = False
    Return
End If

注解

此标识符由 UI 自动化客户端应用程序使用。This identifier is used by UI Automation client applications. UI 自动化提供程序应在 TextPatternIdentifiers中使用等效字段。UI Automation providers should use the equivalent field in TextPatternIdentifiers.

将模式标识符传递给方法(如 GetCurrentPattern),以从指定的 AutomationElement中检索相关的控件模式。The pattern identifier is passed to methods such as GetCurrentPattern to retrieve the control pattern of interest from the specified AutomationElement.

适用于