Control.FontSize Property

Reference

Definition

Namespace:: System.Windows.Controls

Assembly:: PresentationFramework.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

Item	Value
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".

Applies to

通过