TextPatternRange.Clone 方法
定义
重要
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检索与原始 TextPatternRange 完全相同并且继承了其所有属性的 TextPatternRange。
public:
System::Windows::Automation::Text::TextPatternRange ^ Clone();public System.Windows.Automation.Text.TextPatternRange Clone ();member this.Clone : unit -> System.Windows.Automation.Text.TextPatternRangePublic Function Clone () As TextPatternRange返回
新的文本范围。 从不返回空引用（在 Visual Basic 中为 Nothing）。
示例
private TextPatternRange CloneSelection(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].Clone();
}
Private Function CloneSelection(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 currentSelection As TextPatternRange() = textpatternPattern.GetSelection()
Return currentSelection.Clone(0)
End Function
注解
或者，从TextPattern两个终结点创建一个新DocumentRange终结点，以与原始文本范围的终结点相对应。
新范围可以独立于原始区域进行操作。