Rect.Equality(Rect, Rect) Operator
Definition
Important
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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
The first rectangle to compare.
- rect2
- Rect
The second rectangle to compare.
Returns
true
if the rectangles have the same Location and Size values; otherwise, false
.
Examples
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
This operation tests for object equality.
In this comparison, two instances of Double.NaN are considered equal.
Note
A rectangle's position and dimensions are described by Double values. Because Double values can lose precision when operated upon, a comparison between two values that are logically equal might fail.
The equivalent method for this operator is Rect.Equals(Rect, Rect)
Applies to
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