TextPattern.IsReadOnlyAttribute 字段

定义

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

public: static initonly System::Windows::Automation::AutomationTextAttribute ^ IsReadOnlyAttribute;
public static readonly System.Windows.Automation.AutomationTextAttribute IsReadOnlyAttribute;
 staticval mutable IsReadOnlyAttribute : System.Windows.Automation.AutomationTextAttribute
Public Shared ReadOnly IsReadOnlyAttribute 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 GetIsReadOnlyAttribute()
{
    // 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.IsReadOnlyAttribute);
    if (oAttribute == TextPattern.MixedAttributeValue)
    {
        Console.WriteLine("Mixture of readonly and non-readonly.");
    }
    else
    {
        Console.WriteLine(oAttribute.ToString());
    }
}
Private Sub GetIsReadOnlyAttribute()
    ' 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.IsReadOnlyAttribute)
    If (oAttribute = TextPattern.MixedAttributeValue) Then
        Console.WriteLine("Mixture of readonly and non-readonly.")
    Else
        Console.WriteLine(oAttribute.ToString())
    End If
End Sub

注解

此属性表示与调用文本范围关联的文档的只读状态。This attribute represents the read-only state of the document associated with the calling text range.

备注

如果文档或文件是只读的,但仍可以对其进行编辑,并将其另存为其他文件,则不会将文本视为只读。If a document or file is read-only, but you can still edit it and save it as another file, the text is not considered read-only.

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.

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.

此属性的值的类型为 BooleanValues for this attribute are of type Boolean. 默认值为 falseThe default value is false.

适用于

另请参阅