Rect.Equality(Rect, Rect) Operator

Definisi

Ruang nama:

System.Windows

Rakitan:

WindowsBase.dll

Membandingkan dua persegi panjang untuk kesetaraan yang tepat.

public:
 static bool operator ==(System::Windows::Rect rect1, System::Windows::Rect rect2);

public static bool operator == (System.Windows.Rect rect1, System.Windows.Rect rect2);

static member ( = ) : System.Windows.Rect * System.Windows.Rect -> bool

Public Shared Operator == (rect1 As Rect, rect2 As Rect) As Boolean

Parameter

rect1

Rect

Persegi panjang pertama yang dibandingkan.

rect2

Rect

Persegi panjang kedua untuk dibandingkan.

Mengembalikan

Boolean

truejika persegi panjang memiliki nilai dan Size yang samaLocation; jika tidak, false.

Contoh

Contoh berikut menunjukkan cara menggunakan Equality operator untuk menentukan apakah dua persegi panjang sama persis.

private Boolean overloadedEqualityOperatorExample()
{
    // Initialize new rectangle.
    Rect myRectangle = new Rect();

    // The Location property specifies the coordinates of the upper left-hand 
    // corner of the rectangle. 
    myRectangle.Location = new Point(10, 5);

    // Set the Size property of the rectangle with a width of 200
    // and a height of 50.
    myRectangle.Size = new Size(200, 50);

    // Create second rectangle to compare to the first.
    Rect myRectangle2 = new Rect();
    myRectangle2.Location = new Point(0, 0);
    myRectangle2.Size = new Size(200, 50);

    // Check if the two Rects are exactly equal using the overloaded equality operator.
    // areEqual is false because although the size of each rectangle is the same,
    // the locations are different.
    bool areEqual = (myRectangle == myRectangle2);

    // Returns false.
    return areEqual;
}

Private Function overloadedEqualityOperatorExample() As Boolean
    ' Initialize new rectangle.
    Dim myRectangle As New Rect()

    ' The Location property specifies the coordinates of the upper left-hand 
    ' corner of the rectangle. 
    myRectangle.Location = New Point(10, 5)

    ' Set the Size property of the rectangle with a width of 200
    ' and a height of 50.
    myRectangle.Size = New Size(200, 50)

    ' Create second rectangle to compare to the first.
    Dim myRectangle2 As New Rect()
    myRectangle2.Location = New Point(0, 0)
    myRectangle2.Size = New Size(200, 50)

    ' Check if the two Rects are exactly equal using the overloaded equality operator.
    ' areEqual is false because although the size of each rectangle is the same,
    ' the locations are different.
    Dim areEqual As Boolean = (myRectangle = myRectangle2)

    ' Returns false.
    Return areEqual

End Function

Keterangan

Operasi ini menguji kesetaraan objek.

Dalam perbandingan Double.NaN ini, dua instans dianggap sama.

Catatan

Posisi dan dimensi persegi panjang dijelaskan oleh Double nilai. Karena Double nilai dapat kehilangan presisi saat dioperasikan, perbandingan antara dua nilai yang secara logis sama mungkin gagal.

Metode yang setara untuk operator ini adalah Rect.Equals(Rect, Rect)