TextSelection.IsEmpty Property

Reference

Definition

Namespace:: EnvDTE

Assembly:: EnvDTE.dll

Assembly:: Microsoft.VisualStudio.Interop.dll

Package:: Microsoft.VisualStudio.Interop v17.12.40391

Important

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Gets whether the anchor point is equal to the active point.

public:
 property bool IsEmpty { bool get(); };

public:
 property bool IsEmpty { bool get(); };

[System.Runtime.InteropServices.DispId(10)]
public bool IsEmpty { [System.Runtime.InteropServices.DispId(10)] get; }

[<System.Runtime.InteropServices.DispId(10)>]
[<get: System.Runtime.InteropServices.DispId(10)>]
member this.IsEmpty : bool

Public ReadOnly Property IsEmpty As Boolean

Property Value

Boolean

A Boolean value indicating True if the anchor point is equal to the active point, False if not.

Attributes: DispIdAttribute

Examples

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   
        ' text selection.  
        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

Remarks

IsEmpty returns whether the text selection's anchor and active ends are at the same location in the text document.

Applies to

Partilhar via