TextElement.FontSize Property

Definition

Namespace:

System.Windows.Documents

Assembly:

PresentationFramework.dll

Gets or sets the font size for the content of the element.

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

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

[<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 desired font size to use in device independent pixels, greater than 0.001 and less than or equal to 35791. The default depends on current system settings and depends on the MessageFontSize value.

Attributes

TypeConverterAttribute LocalizabilityAttribute

Exceptions

ArgumentException

FontSize is set to a value greater than 35791 or less than or equal to 0.001.

Examples

The following example shows how to set the FontSize attribute, using Paragraph as the example element.

<Paragraph
  FontFamily="Century Gothic, Courier New"  
  FontSize="16pt"
  FontStretch="UltraExpanded"
  FontStyle="Italic"
  FontWeight="DemiBold"
>
  <Run>
    This text will use the Century Gothic font (if available), with fallback to Courier New.  It 
    will render with a font size of 16 points in ultra-expanded demi-bold italic.
  </Run>
</Paragraph>

The following figure shows how the preceding example renders.

The following example shows how to set the FontSize property programmatically.

Run run = new Run(
    "This text will use the Century Gothic font (if available), with fallback to Courier New."
    + "It will render with a font size of 16 pixels in ultra-expanded demi-bold italic.");
Paragraph par = new Paragraph(run);

par.FontFamily = new FontFamily("Century Gothic, Courier New");
par.FontSize = 16;
par.FontStretch = FontStretches.UltraExpanded;
par.FontStyle = FontStyles.Italic;
par.FontWeight = FontWeights.DemiBold;

Dim run As New Run("This text will use the Century Gothic font (if available), with fallback to Courier New." & "It will render with a font size of 16 pixels in ultra-expanded demi-bold italic.")
Dim par As New Paragraph(run)

With par
    .FontFamily = New FontFamily("Century Gothic, Courier New")
    .FontSize = 16
    .FontStretch = FontStretches.UltraExpanded
    .FontStyle = FontStyles.Italic
    .FontWeight = FontWeights.DemiBold
End With

Remarks

This dependency property also has an attached property usage. In XAML, the usage is <object TextElement.FontSize="value".../>, where object is an object element (typically a flow element) contained within a TextElement, and value is one of the string-format values as explained in XAML Values. In code, the attached property usage is supported by the GetFontSize and SetFontSize methods. The attached property usage is not common, because most elements that can be contained in a TextElement support an analogous nonattached FontSize property, which the content host uses for rendering.

XAML Attribute Usage

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

XAML Values

double
Double

String representation of a Double value equal to or greater than 0.0 but smaller than PositiveInfinity. An unqualified value is measured in device independent pixels. Strings need not explicitly include decimal points.

qualifiedDouble
A double value as described above, followed by one of the following unit specifiers: 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

Dependency Property Information

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