Rect.Equality(Rect, Rect) 運算子

定義

命名空間:

System.Windows

組件:

WindowsBase.dll

比較兩個矩形是否完全相等。

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

參數

rect1

Rect

要比較的第一個矩形。

rect2

Rect

要比較的第二個矩形。

傳回

Boolean

如果矩形具有相同的 Location 和 Size 值則為 true，否則為 false。

範例

下列範例示範如何使用 Equality 運算子來判斷兩個矩形是否完全相等。

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

備註

這項作業會測試物件是否相等。

在此比較中，會將 的兩個 Double.NaN 實例視為相等。

注意

矩形的位置和維度是由 Double 值所描述。 因為值在操作時可能會失去有效位數，因此 Double 邏輯上相等的兩個值之間的比較可能會失敗。

這個運算子的對等方法為 Rect.Equals(Rect, Rect)