FormattedText.SetFontSize 方法

定义

命名空间:

System.Windows.Media

程序集:

PresentationCore.dll

设置字号。

重载

SetFontSize(Double)	设置 FormattedText 对象中整个字符集的字号。
SetFontSize(Double, Int32, Int32)	设置 FormattedText 对象中指定的字符子集的字号。

SetFontSize(Double)

设置 FormattedText 对象中整个字符集的字号。

public:
 void SetFontSize(double emSize);

public void SetFontSize (double emSize);

member this.SetFontSize : double -> unit

Public Sub SetFontSize (emSize As Double)

参数

emSize

Double

字体“em”度量值大小，以与设备无关的单位提供 (每单位) 1/96 英寸。

注解

此方法设置整个文本字符串的字号值。 若要设置文本字符串子集的字号值，请使用 SetFontSize 方法。

SetFontSize(Double, Int32, Int32)

设置 FormattedText 对象中指定的字符子集的字号。

public:
 void SetFontSize(double emSize, int startIndex, int count);

public void SetFontSize (double emSize, int startIndex, int count);

member this.SetFontSize : double * int * int -> unit

Public Sub SetFontSize (emSize As Double, startIndex As Integer, count As Integer)

参数

emSize

Double

字体“em”度量值大小，以与设备无关的单位提供 (每单位) 1/96 英寸。

startIndex

Int32

要向其应用字号的初始字符的起始索引。

count

Int32

要向其应用字号的字符数。

示例

以下示例创建 一个 FormattedText 对象，然后将多个格式样式应用于文本，包括 SetFontSize。

protected override void OnRender(DrawingContext drawingContext)
{
    string testString = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor";

    // Create the initial formatted text string.
    FormattedText formattedText = new FormattedText(
        testString,
        CultureInfo.GetCultureInfo("en-us"),
        FlowDirection.LeftToRight,
        new Typeface("Verdana"),
        32,
        Brushes.Black);

    // Set a maximum width and height. If the text overflows these values, an ellipsis "..." appears.
    formattedText.MaxTextWidth = 300;
    formattedText.MaxTextHeight = 240;

    // Use a larger font size beginning at the first (zero-based) character and continuing for 5 characters.
    // The font size is calculated in terms of points -- not as device-independent pixels.
    formattedText.SetFontSize(36 * (96.0 / 72.0), 0, 5);

    // Use a Bold font weight beginning at the 6th character and continuing for 11 characters.
    formattedText.SetFontWeight(FontWeights.Bold, 6, 11);

    // Use a linear gradient brush beginning at the 6th character and continuing for 11 characters.
    formattedText.SetForegroundBrush(
                            new LinearGradientBrush(
                            Colors.Orange,
                            Colors.Teal,
                            90.0),
                            6, 11);

    // Use an Italic font style beginning at the 28th character and continuing for 28 characters.
    formattedText.SetFontStyle(FontStyles.Italic, 28, 28);

    // Draw the formatted text string to the DrawingContext of the control.
    drawingContext.DrawText(formattedText, new Point(10, 0));
}

Protected Overrides Sub OnRender(ByVal drawingContext As DrawingContext)
    Dim testString As String = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor"

    ' Create the initial formatted text string.
    Dim formattedText As New FormattedText(testString, CultureInfo.GetCultureInfo("en-us"), FlowDirection.LeftToRight, New Typeface("Verdana"), 32, Brushes.Black)

    ' Set a maximum width and height. If the text overflows these values, an ellipsis "..." appears.
    formattedText.MaxTextWidth = 300
    formattedText.MaxTextHeight = 240

    ' Use a larger font size beginning at the first (zero-based) character and continuing for 5 characters.
    ' The font size is calculated in terms of points -- not as device-independent pixels.
    formattedText.SetFontSize(36 * (96.0 / 72.0), 0, 5)

    ' Use a Bold font weight beginning at the 6th character and continuing for 11 characters.
    formattedText.SetFontWeight(FontWeights.Bold, 6, 11)

    ' Use a linear gradient brush beginning at the 6th character and continuing for 11 characters.
    formattedText.SetForegroundBrush(New LinearGradientBrush(Colors.Orange, Colors.Teal, 90.0), 6, 11)

    ' Use an Italic font style beginning at the 28th character and continuing for 28 characters.
    formattedText.SetFontStyle(FontStyles.Italic, 28, 28)

    ' Draw the formatted text string to the DrawingContext of the control.
    drawingContext.DrawText(formattedText, New Point(10, 0))
End Sub

注解

若要设置整个文本字符串的字号值，请使用 SetFontSize 方法。