Control.FontSize Property

.NET Framework 4.6 and 4.5

Gets or sets the font size.

Namespace: System.Windows.Controls
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

Syntax

C++

JScript

[TypeConverterAttribute(typeof(FontSizeConverter))]
[BindableAttribute(true)]
[LocalizabilityAttribute(LocalizationCategory.None)]
public double FontSize { get; set; }

XAML Attribute Usage

<object FontSize="double"/>
- or –
<object FontSize ="qualifiedDouble"/>

XAML Values

double

Double

A string representation of a Double value. This is interpreted as a device-independent unit (1/96th inch) measurement. Strings need not explicitly include decimal points. For example, a value of 1 is acceptable.

The same Double range restrictions that are mentioned in the Property Value section apply here.

qualifiedDouble

A double value as previously described that is followed by one of these unit declaration strings: px, in, cm, pt.

px (default) is device-independent units (1/96th inch per unit)

in is inches; 1in==96px

cm is centimeters; 1cm==(96/2.54) px

pt is points; 1pt==(96/72) px

Note In many cases a double may be set to "Auto," but a Control.FontSize does not render if set to "Auto".

Property Value

Type: System.Double
The size of the text in the Control. The default is SystemFonts.MessageFontSize. The font size must be a positive number.

Dependency Property Information

Identifier field	FontSizeProperty
Metadata properties set to true	AffectsMeasure, AffectsRender, Inherits

Remarks

This property only affects a control whose template uses the FontSize property as a parameter. On other controls, this property has no impact.

Examples

The following example shows how to set the font size property of a control.

XAML

<Button Name="btn3" FontSize="10.0" 
        Click="ChangeFontSize">
  FontSize
</Button>

void ChangeFontSize(object sender, RoutedEventArgs e)
{
    fsize = btn3.FontSize;
    if (fsize == 16.0)
    {
        btn3.FontSize = 10.0;
        btn3.Content = "FontSize";
    }
    else
    {
        btn3.FontSize = 16.0;
        btn3.Content = "Control font size changes from 10 to 16.";
    }
}

Control.FontSize Property

Syntax

XAML Values

Property Value

Dependency Property Information

Remarks

Examples

Version Information

.NET Framework

.NET Framework Client Profile

See Also

Reference

Other Resources