TextPattern.IndentationLeadingAttribute 字段

定义

命名空间:

System.Windows.Automation

程序集:

UIAutomationClient.dll

标识文本范围的 IndentationLeading (TextIndent) 特性。

public: static initonly System::Windows::Automation::AutomationTextAttribute ^ IndentationLeadingAttribute;

public static readonly System.Windows.Automation.AutomationTextAttribute IndentationLeadingAttribute;

 staticval mutable IndentationLeadingAttribute : System.Windows.Automation.AutomationTextAttribute

Public Shared ReadOnly IndentationLeadingAttribute As AutomationTextAttribute 

字段值

AutomationTextAttribute

示例

以下示例演示如何在记事本Microsoft获取一系列文本的属性值。

注意

Microsoft记事本用作文本提供程序，仅用于例如目的。 Microsoft记事本不保证支持所请求的属性值。

private void GetIndentationLeadingAttribute()
{
    // 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.IndentationLeadingAttribute);
    if (oAttribute == TextPattern.MixedAttributeValue)
    {
        Console.WriteLine("Mixed leading indentation.");
    }
    else
    {
        Console.WriteLine(oAttribute.ToString());
    }
}

Private Sub GetIndentationLeadingAttribute()
    ' 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.IndentationLeadingAttribute)
    If (oAttribute = TextPattern.MixedAttributeValue) Then
        Console.WriteLine("Mixed leading indentations.")
    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关联的段落 (GraphicsUnit) () 的前导缩进点。

此标识符由UI 自动化客户端应用程序使用。 UI 自动化提供程序应使用 中的TextPatternIdentifiers等效字段。

UI 自动化客户端通过调用 GetAttributeValue获取 属性的值。

此属性的值的类型为 Double。 默认值是 zero。

另请参阅

• TextPatternRange