TextPattern.GetSelection 方法

定义

命名空间:

System.Windows.Automation

程序集:

UIAutomationClient.dll

检索与当前文本选择（或多个文本选择）关联的不连续文本范围的集合。

public:
 cli::array <System::Windows::Automation::Text::TextPatternRange ^> ^ GetSelection();

public System.Windows.Automation.Text.TextPatternRange[] GetSelection ();

member this.GetSelection : unit -> System.Windows.Automation.Text.TextPatternRange[]

Public Function GetSelection () As TextPatternRange()

返回

TextPatternRange[]

不连续文本范围的集合。

例外

InvalidOperationException

文本容器不支持文本选择。

示例

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

    // target --> The root AutomationElement.
    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 null;
    }
    TextPatternRange[] currentSelection = textpatternPattern.GetSelection();
    return currentSelection[0];
}

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

    ' target --> The root AutomationElement.
    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 Nothing
    End If
    Dim currentTextSelection As TextPatternRange() = textpatternPattern.GetSelection()
    Return currentTextSelection(0)
End Function

注解

如果未选择任何文本， GetSelection 则返回 (空范围) 在系统游标的位置 (文本插入点的位置) 的退化文本范围。

如果系统光标 (文本插入点) 不存在， GetSelection 可能会返回 null。

备注

使用 SupportedTextSelection 属性测试控件是否支持文本插入点的文本选择或定位。

另请参阅

• TextPatternRange