TextPattern.HorizontalTextAlignmentAttribute 字段

定义

标识文本范围的 HorizontalTextAlignment 特性。Identifies the HorizontalTextAlignment attribute of a text range.

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

字段值

示例

下面的示例演示如何获取 Microsoft Notepad 中文本范围的属性值。The following example shows how to obtain an attribute value for a range of text in Microsoft Notepad.

备注

仅出于举例目的, Microsoft Notepad 用作文本提供程序。Microsoft Notepad is used as the text provider for example purposes only. 不保证 Microsoft 记事本支持所请求的属性值。Microsoft Notepad is not guaranteed to support the attribute value being requested.

private void GetHorizontalTextAlignmentAttribute()
{
    // Start application.
    Process p = Process.Start("Notepad.exe", "text.txt");

    // target --> The root AutomationElement.
    AutomationElement target = AutomationElement.FromHandle(p.MainWindowHandle);

    // Specify the control type we're looking for, in this case 'Document'
    PropertyCondition cond = new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Document);

    AutomationElement textProvider = target.FindFirst(TreeScope.Descendants, cond);

    TextPattern textpatternPattern = textProvider.GetCurrentPattern(TextPattern.Pattern) as TextPattern;

    if (textpatternPattern == null)
    {
        Console.WriteLine("Root element does not contain a descendant that supports TextPattern.");
        return;
    }

    Object oAttribute = textpatternPattern.DocumentRange.GetAttributeValue(TextPattern.HorizontalTextAlignmentAttribute);
    if (oAttribute == TextPattern.MixedAttributeValue)
    {
        Console.WriteLine("Mixed horizontal alignments.");
    }
    else
    {
        Console.WriteLine(oAttribute.ToString());
    }
}
Private Sub GetHorizontalTextAlignmentAttribute()
    ' Start application.
    Dim p As Process = Process.Start("Notepad.exe", "text.txt")

    ' target --> The root AutomationElement.
    Dim target As AutomationElement = AutomationElement.FromHandle(p.MainWindowHandle)

    ' Specify the control type we're looking for, in this case 'Document'
    Dim cond As PropertyCondition = New PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Document)

    Dim textProvider As AutomationElement = target.FindFirst(TreeScope.Descendants, cond)

    Dim textpatternPattern As TextPattern = CType(textProvider.GetCurrentPattern(TextPattern.Pattern), TextPattern)

    If (textpatternPattern Is Nothing) Then
        Console.WriteLine("Root element does not contain a descendant that supports TextPattern.")
        Return
    End If

    Dim oAttribute As Object = textpatternPattern.DocumentRange.GetAttributeValue(TextPattern.HorizontalTextAlignmentAttribute)
    If (oAttribute = TextPattern.MixedAttributeValue) Then
        Console.WriteLine("Mixed horizontal alignments.")
    Else
        Console.WriteLine(oAttribute.ToString())
    End If
End Sub

注解

此属性表示应用于与调用文本范围相关联的段落的水平文本对齐方式。This attribute represents the horizontal text alignment applied to the paragraph(s) associated with the calling text range.

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中TextPatternIdentifiers使用等效字段。UI Automation providers should use the equivalent field in TextPatternIdentifiers.

UI 自动化客户端通过调用GetAttributeValue获取属性的值。UI Automation clients get the value of the attribute by calling GetAttributeValue.

此属性的值为类型HorizontalTextAlignmentValues for this attribute are of type HorizontalTextAlignment. 默认值为 LeftThe default value is Left

适用于

另请参阅