Articolo
11/17/2011

FontWeight Structure

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

Refers to the density of a typeface, in terms of the lightness or heaviness of the strokes.

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

Syntax

'Declaration
Public Structure FontWeight

public struct FontWeight

<object property="fontWeightsPropertyName"/>

XAML Values

fontWeightsPropertyName
A FontWeights static property name, such as Light, Normal, or Bold.

The FontWeight type exposes the following members.

Methods

	Name	Description
	Equals	Determines whether the current FontWeight object is equal to a specified object. (Overrides ValueType.Equals(Object).)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Retrieves the hash code for this object. (Overrides ValueType.GetHashCode().)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a text string that represents the value of the FontWeight object. (Overrides ValueType.ToString().)

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Operators

	Name	Description
	Equality	Compares two instances of FontWeight for equality.
	Inequality	Evaluates two instances of FontWeight to determine inequality.

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Remarks

Weight differences are generally differentiated by an increased stroke or thickness that is associated with a given character in a typeface, as compared to a "normal" character from that same typeface.

Note Not all weights are available for all typefaces. When a weight is not available for a typeface, the closest matching weight is returned.

This structure provides compatibility between Silverlight and WPF properties that specify a font weight. The compatibility requirement is that in JavaScript API for Silverlight, the relevant properties referenced FontWeight, which is an enumeration, whereas WPF relevant properties referenced FontWeights, a class with static properties.

FontWeight is the value type for Silverlight properties or attributes that specify a font weight value, but you must use static properties of FontWeights to provide a FontWeight value. In XAML, you specify the name of a FontWeights property as the attribute value. This functionality is enabled by native XAML parsing behavior that processes the string value.

FontWeights Static Property Names

Font weight	usWeightClass
Thin	100
ExtraLight	200
Light	300
Normal	400
Medium	500
SemiBold	600
Bold	700
ExtraBold	800
Black	900
ExtraBlack	950

The FontWeights values correspond to the usWeightClass definition in the OpenType specification. The usWeightClass represents an integer value between 1 and 999. Lower values indicate lighter weights; higher values indicate heavier weights.

Do not use the value UltraBold; this value is not supported by Silverlight 5.

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.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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