TextBlock.FontSize Property
Gets or sets the top-level font size for the TextBlock. This is a dependency property. This is a dependency property.
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
[TypeConverterAttribute(typeof(FontSizeConverter))] [LocalizabilityAttribute(LocalizationCategory.None)] public double FontSize { get; set; }
<object FontSize="double"/> - or - <object FontSize="qualifiedDouble"/>
XAML Values
Property Value
Type: System.DoubleThe desired font size to use in device independent pixels). The default is determined by the SystemFonts.MessageFontSize value.
Any FontSize settings on child elements override this top-level setting.
This dependency property also has an attached property usage. In XAML, the usage is <object TextBlock.FontSize="value".../>, where object is an object element (typically a flow element) contained within a TextBlock, and value is one of the string-format values as explained in XAML Values. In code, the attached property usage is supported by GetFontSize and SetFontSize. The attached property usage is not common, because most elements that can be contained in a TextBlock support an analogous nonattached FontSize property, which the TextBlock uses for rendering.
The following example shows how to set the FontSize attribute of a TextBlock element.
<TextBlock Name="textBlock" Background="AntiqueWhite" Foreground="Navy" FontFamily="Century Gothic" FontSize="12" FontStretch="UltraExpanded" FontStyle="Italic" FontWeight="UltraBold" LineHeight="Auto" Padding="5,10,5,10" TextAlignment="Center" TextWrapping="Wrap" Typography.NumeralStyle="OldStyle" Typography.SlashedZero="True" > <Run Background="LightGreen">Text run 1.</Run> <LineBreak/><Run Background="LightBlue">Text run 2.</Run> <LineBreak/><Run Background="LightYellow">Text run 3.</Run> </TextBlock>
The following example shows how to set the FontSize property programmatically.
TextBlock textBlock = new TextBlock(new Run("A bit of text content...")); textBlock.Background = Brushes.AntiqueWhite; textBlock.Foreground = Brushes.Navy; textBlock.FontFamily = new FontFamily("Century Gothic"); textBlock.FontSize = 12; textBlock.FontStretch = FontStretches.UltraExpanded; textBlock.FontStyle = FontStyles.Italic; textBlock.FontWeight = FontWeights.UltraBold; textBlock.LineHeight = Double.NaN; textBlock.Padding = new Thickness(5, 10, 5, 10); textBlock.TextAlignment = TextAlignment.Center; textBlock.TextWrapping = TextWrapping.Wrap; textBlock.Typography.NumeralStyle = FontNumeralStyle.OldStyle; textBlock.Typography.SlashedZero = true;
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
