TextRange.Contains(TextPointer) Methode

Definition

Namespace:

System.Windows.Documents

Assembly:

PresentationFramework.dll

Überprüft, ob sich eine Position (von einem TextPointer angegeben) innerhalb der aktuellen Auswahl befindet.

public:
 bool Contains(System::Windows::Documents::TextPointer ^ textPointer);

public bool Contains (System.Windows.Documents.TextPointer textPointer);

member this.Contains : System.Windows.Documents.TextPointer -> bool

Public Function Contains (textPointer As TextPointer) As Boolean

Parameter

textPointer

TextPointer

Eine Position, die daraufhin getestet wird, ob sie in der aktuellen Auswahl enthalten ist.

Gibt zurück

Boolean

true, wenn sich die angegebene Position innerhalb der aktuellen Auswahl befindet, andernfalls false.

Ausnahmen

ArgumentException

Tritt auf, wenn sich textPointer nicht in demselben Dokument wie die aktuelle Auswahl befindet.

Beispiele

Im folgenden Beispiel wird die Verwendung der Contains-Methode gezeigt.

// This method returns true if two specified selections overlap, including when the
// end of one selection serves as the beginning of the other.
bool DoSelectionsOverlap(TextRange selection1, TextRange selection2)
{
    // Is either end of selection2 contained by selection1?
    if (selection1.Contains(selection2.Start) || selection1.Contains(selection2.End))
    {
        // If so, the selections overlap.
        return true;
    }
    // If not, selection2 may still entirely contain selection1.
    // Is either end of selection1 contained by seleciotn2?
    else if (selection2.Contains(selection1.Start) || selection2.Contains(selection1.End))
    {
        // If so, the selections overlap.
        return true;
    }
    // If neither selection contains the begging or end of the other selection, 
    //the selections do not overlap.
    else
    {
        return false;
    }
}

' This method returns true if two specified selections overlap, including when the
' end of one selection serves as the beginning of the other.
Private Function DoSelectionsOverlap(ByVal selection1 As TextRange, ByVal selection2 As TextRange) As Boolean
    ' Is either end of selection2 contained by selection1?
    If selection1.Contains(selection2.Start) OrElse selection1.Contains(selection2.End) Then
        ' If so, the selections overlap.
        Return True
        ' If not, selection2 may still entirely contain selection1.
        ' Is either end of selection1 contained by seleciotn2?
    ElseIf selection2.Contains(selection1.Start) OrElse selection2.Contains(selection1.End) Then
        ' If so, the selections overlap.
        Return True
        ' If neither selection contains the begging or end of the other selection, 
        'the selections do not overlap.
    Else
        Return False
    End If
End Function

Hinweise

Positionen an beiden Enden der aktuellen Auswahl (angegeben durch Start und End) werden als Teil der aktuellen Auswahl betrachtet.