Control.FontSize Property

Definition

Namespace:

System.Windows.Controls

Assembly:

PresentationFramework.dll

Gets or sets the font size.

public:
 property double FontSize { double get(); void set(double value); };

[System.ComponentModel.Bindable(true)]
[System.ComponentModel.TypeConverter(typeof(System.Windows.FontSizeConverter))]
[System.Windows.Localizability(System.Windows.LocalizationCategory.None)]
public double FontSize { get; set; }

[<System.ComponentModel.Bindable(true)>]
[<System.ComponentModel.TypeConverter(typeof(System.Windows.FontSizeConverter))>]
[<System.Windows.Localizability(System.Windows.LocalizationCategory.None)>]
member this.FontSize : double with get, set

Public Property FontSize As Double

Property Value

Double

The size of the text in the Control. The default is MessageFontSize. The font size must be a positive number.

Attributes

BindableAttribute TypeConverterAttribute LocalizabilityAttribute

Examples

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

<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.";
    }
}

Private Sub ChangeFontSize(ByVal Sender As Object, ByVal e As RoutedEventArgs)

    fsize = btn3.FontSize
    If (fsize = 16.0) Then

        btn3.FontSize = 10.0
        btn3.Content = "FontSize"

    Else

        btn3.FontSize = 16.0
        btn3.Content = "Control font size changes from 10 to 16."
    End If
End Sub

Remarks

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

Dependency Property Information

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

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".