TextRange.Contains(TextPointer) Método

Definição

Namespace:

System.Windows.Documents

Assembly:

PresentationFramework.dll

Verifica se uma posição (especificada por um TextPointer) está localizada na seleção atual.

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

Parâmetros

textPointer

TextPointer

Uma posição para testar quanto à inclusão na seleção atual.

Retornos

Boolean

true se a posição especificada estiver localizada em uma seleção atual; caso contrário, false.

Exceções

ArgumentException

Ocorre quando textPointer não está no mesmo documento que a seleção atual.

Exemplos

O exemplo a seguir demonstra o uso do método Contains.

// 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

Comentários

As posições em ambas as extremidades da seleção atual (indicada por Start e End) são consideradas parte da seleção atual.