Rect.Equality(Rect, Rect) Operator

Definition

Проверяет точное равенство двух прямоугольников.Compares two rectangles for exact equality.

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

Parameters

rect1
Rect

Первый прямоугольник для сравнения.The first rectangle to compare.

rect2
Rect

Второй прямоугольник для сравнения.The second rectangle to compare.

Returns

Boolean

true, если прямоугольники имеют одинаковые значения свойств Location и Size; в противном случае — false.true if the rectangles have the same Location and Size values; otherwise, false.

Examples

В следующем примере показано, как использовать оператор Equality, чтобы определить, равны ли два прямоугольника.The following example shows how to use the Equality operator to determine if two rectangles are exactly equal.

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

Remarks

Эта операция проверяет равенство объектов.This operation tests for object equality.

В этом сравнении два экземпляра Double.NaN считаются равными.In this comparison, two instances of Double.NaN are considered equal.

Note

Расположение и измерения прямоугольника описываются Double значениями.A rectangle's position and dimensions are described by Double values. Поскольку значения Double могут терять точность при работе с, сравнение двух логически эквивалентных значений может завершиться ошибкой.Because Double values can lose precision when operated upon, a comparison between two values that are logically equal might fail.

Эквивалентным методом для этого оператора является Rect.Equals(Rect, Rect)The equivalent method for this operator is Rect.Equals(Rect, Rect)

Applies to