FormattedText.SetForegroundBrush 方法

定义

命名空间:

System.Windows.Media

程序集:

PresentationCore.dll

更改用于绘制文本的前景画笔。

重载

SetForegroundBrush(Brush, Int32, Int32)	更改 Brush 对象中指定文本的前景 FormattedText。
SetForegroundBrush(Brush)	更改整个 Brush 对象的前景 FormattedText。

SetForegroundBrush(Brush, Int32, Int32)

更改 Brush 对象中指定文本的前景 FormattedText。

public:
 void SetForegroundBrush(System::Windows::Media::Brush ^ foregroundBrush, int startIndex, int count);

public void SetForegroundBrush (System.Windows.Media.Brush foregroundBrush, int startIndex, int count);

member this.SetForegroundBrush : System.Windows.Media.Brush * int * int -> unit

Public Sub SetForegroundBrush (foregroundBrush As Brush, startIndex As Integer, count As Integer)

参数

foregroundBrush

Brush

要用于文本前景的画笔。

startIndex

Int32

要向其应用前景画笔的初始字符的起始索引。

count

Int32

要向其应用前景画笔的字符数。

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 SetForegroundBrush。

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前景画笔，请使用 SetForegroundBrush 该方法。

SetForegroundBrush(Brush)

更改整个 Brush 对象的前景 FormattedText。

public:
 void SetForegroundBrush(System::Windows::Media::Brush ^ foregroundBrush);

public void SetForegroundBrush (System.Windows.Media.Brush foregroundBrush);

member this.SetForegroundBrush : System.Windows.Media.Brush -> unit

Public Sub SetForegroundBrush (foregroundBrush As Brush)

参数

foregroundBrush

Brush

要用于文本前景的画笔。

注解

此方法设置整个文本字符串的前景画笔。 若要设置文本字符串子集的前景画笔，请使用 SetForegroundBrush(Brush, Int32, Int32) 该方法。