TextPattern.GetSelection 方法
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
擷取與目前文字選取範圍關聯之斷續文字範圍的集合。
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()
傳回
斷續文字範圍的集合。
例外狀況
文字容器不支援文字選取範圍。
範例
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
備註
如果未選取任何文字, GetSelection 則會傳回空範圍 (空範圍) 系統游標的位置 (文字插入點) 。
如果系統游標 (文字插入點) 不存在, GetSelection 可能會傳回 null
。
注意
SupportedTextSelection使用 屬性來測試控制項是否支援文字插入點的文字選取範圍或位置。