TextPatternRange.GetText(Int32) 方法

public:
 System::String ^ GetText(int maxLength);

public string GetText(int maxLength);

member this.GetText : int -> string

Public Function GetText (maxLength As Integer) As String

參數

傳回

文本的純文字範圍，可能在指定的 maxLength。

例外狀況

範例

 private String TextFromSelection(AutomationElement target, Int32 length)
{
    // 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();

    // GetText(-1) retrieves all characters but can be inefficient
    return currentSelection[0].GetText(length);
}

Private Function TextFromSelection(ByVal target As AutomationElement, ByVal length As Int32) As String
    ' 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()
    ' GetText(-1) retrieves all characters but can be inefficient
    Return currentSelection(0).GetText(length)
End Function

備註

GetText 尊重隱藏與可見文字。 使用者介面自動化 用戶端可以檢查 IsHiddenAttribute 以確認文字可見性。

若 maxLength 大於呼叫者文字範圍的長度，回傳的字串將是該文字範圍的明文。

GetText 不會受到文本流程端點順序的影響;它總是會依邏輯文字流順序回傳文字範圍的開始端點與結束端點之間的文字。

另請參閱

• TextPatternRangeEndpoint