我需要参考什么来访问CustomTextParagraphProperties？

Question

使用TextFormatter，我来到this article on MSDN，显示以下示例代码：

// Create a TextFormatter object.
TextFormatter formatter = TextFormatter.Create();

// Create common paragraph property settings.
CustomTextParagraphProperties customTextParagraphProperties
    = new CustomTextParagraphProperties();

// Format each line of text from the text store and draw it.
while (textStorePosition < customTextSource.Text.Length)
{
    // Create a textline from the text store using the TextFormatter object.
    using (TextLine myTextLine = formatter.FormatLine(
        customTextSource,
        textStorePosition,
        96 * 6,
        customTextParagraphProperties,
        null))
    {
        // Draw the formatted text into the drawing context.
        myTextLine.Draw(drawingContext, linePosition, InvertAxes.None);

        // Update the index position in the text store.
        textStorePosition += myTextLine.Length;

        // Update the line position coordinate for the displayed line.
        linePosition.Y += myTextLine.Height;
    }
}

我遇到的问题是，在引用System.Windows.Media.TextFormatting之后，没有使用CustomTextParagraphProperties的类/对象，因此该行会抛出错误（当然因为它不存在）

访问此课程还需要参考什么？

这是我的using列表：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.Drawing.Printing;
using System.ComponentModel;
using System.Windows.Media.TextFormatting;
using System.IO;

这是我的参考文献清单：

我找到了TextParagraphProperties，但这是一个abstract类，因此无法使用new创建，这意味着它不能代替CustomTextParagraphProperties替换为TextParagraphProperties tp = new TextParagraphProperties(); 示例显示，以下行不起作用：

abstract

注意：我添加了WPF标记，因为该项目继承了WPF功能，但这不是WPF项目。

我开始深入研究一个兔子洞，发现父母所依赖的越来越多的代码new类，并且由于不能使用#region textformatter class TextRunProperties : System.Windows.Media.TextFormatting.TextRunProperties { public override Windows.Media.Brush BackgroundBrush { get; set; } public override Windows.BaselineAlignment BaselineAlignment { get { return base.BaselineAlignment; } } public override CultureInfo CultureInfo { get; set; } public override double FontHintingEmSize { get; set; } public override double FontRenderingEmSize { get; set; } public override Windows.Media.Brush ForegroundBrush { get; set; } public override Windows.Media.NumberSubstitution NumberSubstitution { get { return base.NumberSubstitution; } } public override TextDecorationCollection TextDecorations { get; set; } public override Windows.Media.TextEffectCollection TextEffects { get; set; } public override Windows.Media.Typeface Typeface { get; set; } public override Windows.Media.TextFormatting.TextRunTypographyProperties TypographyProperties { get { return base.TypographyProperties; } } } class TextRun : System.Windows.Media.TextFormatting.TextRun { public override CharacterBufferReference CharacterBufferReference { get; set; } public override int Length { get; set; } public override Windows.Media.TextFormatting.TextRunProperties Properties { get; set; } } class TextSource : System.Windows.Media.TextFormatting.TextSource { public override Windows.Media.TextFormatting.TextSpan<CultureSpecificCharacterBufferRange> GetPrecedingText( int textSourceCharacterIndexLimit ) { return new TextSpan<CultureSpecificCharacterBufferRange>( textSourceCharacterIndexLimit, new CultureSpecificCharacterBufferRange( new CultureInfo(0), Windows.Media.TextFormatting.CharacterBufferRange.Empty ) ); } public override int GetTextEffectCharacterIndexFromTextSourceCharacterIndex( int textSourceCharacterIndex ) { return 0; } public override Windows.Media.TextFormatting.TextRun GetTextRun( int textSourceCharacterIndex ) { return new TextRun(); } } class TextFormatter : System.Windows.Media.TextFormatting.TextFormatter { public override Windows.Media.TextFormatting.TextLine FormatLine( Windows.Media.TextFormatting.TextSource textSource, int firstCharIndex, double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak, TextRunCache textRunCache ) { throw new NotImplementedException(); } public override Windows.Media.TextFormatting.TextLine FormatLine( Windows.Media.TextFormatting.TextSource textSource, int firstCharIndex, double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak ) { throw new NotImplementedException(); } public override Windows.Media.TextFormatting.MinMaxParagraphWidth FormatMinMaxParagraphWidth( Windows.Media.TextFormatting.TextSource textSource, int firstCharIndex, TextParagraphProperties paragraphProperties ) { throw new NotImplementedException(); } public override Windows.Media.TextFormatting.MinMaxParagraphWidth FormatMinMaxParagraphWidth( Windows.Media.TextFormatting.TextSource textSource, int firstCharIndex, TextParagraphProperties paragraphProperties, TextRunCache textRunCache ) { throw new NotImplementedException(); } } class TextLine : System.Windows.Media.TextFormatting.TextLine { public override double Baseline { get { throw new NotImplementedException(); } } public override int DependentLength { get { throw new NotImplementedException(); } } public override double Extent { get { throw new NotImplementedException(); } } public override bool HasCollapsed { get { throw new NotImplementedException(); } } public override bool HasOverflowed { get { throw new NotImplementedException(); } } public override double Height { get { throw new NotImplementedException(); } } public override bool IsTruncated { get { return base.IsTruncated; } } public override int Length { get { throw new NotImplementedException(); } } public override double MarkerBaseline { get { throw new NotImplementedException(); } } public override double MarkerHeight { get { throw new NotImplementedException(); } } public override int NewlineLength { get { throw new NotImplementedException(); } } public override double OverhangAfter { get { throw new NotImplementedException(); } } public override double OverhangLeading { get { throw new NotImplementedException(); } } public override double OverhangTrailing { get { throw new NotImplementedException(); } } public override double Start { get { throw new NotImplementedException(); } } public override double TextBaseline { get { throw new NotImplementedException(); } } public override double TextHeight { get { throw new NotImplementedException(); } } public override int TrailingWhitespaceLength { get { throw new NotImplementedException(); } } public override double Width { get { throw new NotImplementedException(); } } public override double WidthIncludingTrailingWhitespace { get { throw new NotImplementedException(); } } // functions public override Windows.Media.TextFormatting.TextLine Collapse( params TextCollapsingProperties[] collapsingPropertiesList ) { throw new NotImplementedException(); } public override void Draw( DrawingContext drawingContext, Windows.Point origin, InvertAxes inversion ) { throw new NotImplementedException(); } public override CharacterHit GetBackspaceCaretCharacterHit( CharacterHit characterHit ) { throw new NotImplementedException(); } public override CharacterHit GetCharacterHitFromDistance( double distance ) { throw new NotImplementedException(); } public override double GetDistanceFromCharacterHit( CharacterHit characterHit ) { throw new NotImplementedException(); } public override IEnumerable<IndexedGlyphRun> GetIndexedGlyphRuns() { throw new NotImplementedException(); } public override CharacterHit GetNextCaretCharacterHit( CharacterHit characterHit ) { throw new NotImplementedException(); } public override CharacterHit GetPreviousCaretCharacterHit( CharacterHit characterHit ) { throw new NotImplementedException(); } public override IList<TextBounds> GetTextBounds( int firstTextSourceCharacterIndex, int textLength ) { throw new NotImplementedException(); } public override IList<TextCollapsedRange> GetTextCollapsedRanges() { throw new NotImplementedException(); } public override TextLineBreak GetTextLineBreak() { throw new NotImplementedException(); } public override IList<TextSpan<Windows.Media.TextFormatting.TextRun>> GetTextRunSpans() { throw new NotImplementedException(); } } #endregion 来对象进行过分析，所以必须写一堆代码，看不到尽头，这是相当令人沮丧的：

must override

我甚至不知道这是否正确，但从它看来，这些sparkling-shell方法都没有返回任何内容，那么这个类到底是做什么的呢？它是否会处理任何代码，例如获取TextEffect，或者这是所有必须手写的东西 - 也就是说，我必须组成我自己的TextEffects并将它们填充到代码中作为任何具有更多方法的抽象结构什么都不做......

Answer 1

您必须从TextParagraphProperties派生自己的类，并根据您的要求覆盖属性

public class CustomTextParagraphProperties  : TextParagraphProperties{...}

您还必须派生TextRunProperties和TextMarkerProperties来返回您自己的值。

public class CustomTextRunProperties : TextRunProperties{...}
public class CustomTextMarkerProperties : TextMarkerProperties{...}