Articolo
11/18/2011

Rect Constructor (Double, Double, Double, Double)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Initializes a Rect structure that has the specified x-coordinate, y-coordinate, width, and height.

Namespace: System.Windows
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public Sub New ( _
    x As Double, _
    y As Double, _
    width As Double, _
    height As Double _
)

public Rect(
    double x,
    double y,
    double width,
    double height
)

Parameters

x
Type: System.Double
The x-coordinate of the top-left corner of the rectangle.

y
Type: System.Double
The y-coordinate of the top-left corner of the rectangle.

width
Type: System.Double
The width of the rectangle.

height
Type: System.Double
The height of the rectangle.

Exceptions

Exception	Condition
ArgumentException	width or height are less than 0.

Remarks

Note:
width and height can be negative if they are specified in XAML as part of the attribute string, with the result that the direction that the width or height applies to is inverted. For instance, a height of -20 will produce a Rect where the X,Y point is now the bottom left corner. However, the Rect constructor in the managed API does not permit negative values for width and height. You should adjust the coordinate reference of x,y, width and height such that the Rect can be specified using non-negative width and height values.

width and height can be negative if they are specified in XAML as part of the attribute string, with the result that the direction that the width or height applies to is inverted. For instance, a height of -20 will produce a Rect where the X,Y point is now the bottom left corner. However, the Rect constructor in the managed API does not permit negative values for width and height. You should adjust the coordinate reference of x,y, width and height such that the Rect can be specified using non-negative width and height values.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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