Propriedade TextSelection.IsEmpty
Obtém se o ponto âncora é igual ao ponto ativo.
Namespace: EnvDTE
Assembly: EnvDTE (em EnvDTE. dll)
Sintaxe
ReadOnly Property IsEmpty As Boolean
Dim instance As TextSelection
Dim value As Boolean
value = instance.IsEmpty
bool IsEmpty { get; }
property bool IsEmpty {
bool get ();
}
function get IsEmpty () : boolean
Valor da propriedade
Tipo: System.Boolean
Um valor booleano valor indicando True se o ponto de âncora é igual para o ponto ativo, False se não.
Comentários
IsEmpty retorna se o Selecionado do texto âncora e extremidades Ativos são no mesmo local do documento de texto.
Exemplos
Sub IsEmptyExample()
' Before running this example, open a text document.
Dim objSel As TextSelection = DTE.ActiveDocument.Selection
If objSel.IsEmpty Then
' If there is no text selected, swap the words before and after
' the insertion point. We begin by selecting the word before
' the insertion point.
objSel.WordLeft(True)
If Not objSel.IsEmpty Then
' We can continue only if the selection was not already at
' the beginning of the document.
Dim strBefore As String = objSel.Text
' The text is saved in strBefore; now delete it and move
' past the following word.
objSel.Delete()
objSel.WordRight(True)
If objSel.Text.StartsWith(" ") Or objSel.Text.StartsWith(Microsoft.VisualBasic.ControlChars.Tab) Then
' The previous call to WordRight may have skipped some
' white space instead of an actual word. In that case,
' we should call it again.
objSel.WordRight(True)
End If
' Insert the new text at the end of the selection.
objSel.Insert(strBefore, vsInsertFlags.vsInsertFlagsInsertAtEnd)
End If
Else
' If some text is selected, replace the following word with the
' selected text.
Dim strSelected As String = objSel.Text
objSel.MoveToPoint(objSel.BottomPoint)
objSel.WordRight(True)
If objSel.Text.StartsWith(" ") Or objSel.Text.StartsWith(Microsoft.VisualBasic.ControlChars.Tab) Then
' The previous call to WordRight may have skipped some
' white space instead of an actual word. In that case, we
' should call it again.
objSel.WordRight(True)
End If
' Insert the text, overwriting the existing text and leaving
' the selection containing the inserted text.
objSel.Insert(strSelected, vsInsertFlags.vsInsertFlagsContainNewText)
End If
End Sub
Permissões
- Confiar total para o chamador imediato. Este membro não pode ser usado pelo código parcialmente confiável. Para obter mais informações, consulte Usando bibliotecas de códigos parcialmente Confiável.