Learn how to create a .NET component for generating HTML files programmatically with text and image support. Includes design, implementation, testing, and documentation.
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类设计－Paragraphs • 集合类，Paragraph对象的集合 • 继承CollectionBase • 方法 • public void Add(Paragraph paragraph) • public Paragraph this[int index] • public Paragraph this[string paragraphID] • public int IndexOf(Paragraph paragraph)
类设计－Document • 属性 • public Paragraphs Paragraphs • Public string Title • 方法 • public void Save(string path) • public void Save(stream outStream)
类设计－Text • 继承Paragraph • 属性 • public string Content • public string FontName • public int FontSize • public string Color • 方法 • public Text(string content)
类设计－Image • 继承Paragraph • 属性 • public string Src • public int Width • public int Height • 方法 • public Image(string src) • public Image(string src,int width,int height)
代码实现－Paragraph /// <summary> /// Represents a paragraph in the HTML document. /// </summary> public abstract class Paragraph { /// <summary> /// Initializes a new instance of the <see cref="Paragraph"/> class. /// </summary> public Paragraph() { }
代码实现－Paragraph /// <summary> /// The ID of the paragraph. /// </summary> private string paraID; /// <summary> /// Gets or sets a string that indicates the ID of the paragraph. /// </summary> public string ID { get { return this.paraID; } set { this.paraID = value; } }
代码实现－Paragraphs /// <summary> /// Represents a collection of <see cref="Paragraph"/> objects. /// </summary> public class Paragraphs : CollectionBase { /// <summary> /// Initializes a new instance of the <see cref="Paragraphs"/> class. /// </summary> public Paragraphs() { }
代码实现－Paragraphs /// <summary> /// Adds a new <see cref="Paragraph"/> object into the collection. /// </summary> /// <param name="paragraph">The <see cref="Paragraph"/> object to be added.</param> public void Add(Paragraph paragraph) { this.List.Add(paragraph); }
代码实现－Paragraphs /// <summary> /// Gets or sets a <see cref="Paragraph"/> object from the collection according to Paragraph index. /// </summary> public Paragraph this[int index] { get { if (index >= 0 && index < this.Count) return (Paragraph)this.List[index]; else throw new ArgumentException("Invalid index in Paragraphs indexer: " + index.ToString()); }
代码实现－Paragraphs set { if (index >= 0 && index < this.Count) this.List[index] = value; else throw new ArgumentException("Invalid index in Paragraphs indexer: " + index.ToString()); } }
代码实现－Paragraphs /// <summary> /// Gets or sets a <see cref="Paragraph"/> object from the collection according to Paragraph ID. /// </summary> public Paragraph this[string paragraphID] { get { Paragraph resultParagraph = null; foreach (Paragraph curParagraph in this) { if (String.Compare(curParagraph.ID, paragraphID,false) == 0) { resultParagraph = curParagraph; break; } }
代码实现－Paragraphs if (resultParagraph != null) return resultParagraph; else throw new ArgumentException("Paragraph ID not found in Paragraphs indexer: " + paragraphID); }
代码实现－Paragraphs set { Paragraph resultParagraph = null; foreach (Paragraph curParagraph in this) { if (String.Compare(curParagraph.ID, paragraphID, false) == 0) { resultParagraph = curParagraph; break; } } if (resultParagraph != null) resultParagraph = value; else throw new ArgumentException("Paragraph ID not found in Paragraphs indexer: " + paragraphID); } }
代码实现－Paragraphs /// <summary> /// Gets the index of a specified <see cref="Paragraph"/> object in the collection. /// </summary> /// <param name="paragraph">The specified paragraph.</param> /// <returns>The index value.</returns> public int IndexOf(Paragraph paragraph) { return this.List.IndexOf(paragraph); }
代码实现－Document /// <summary> /// Represents a HTML document. /// </summary> public class Document { /// <summary> /// Initializes a new instance of the <see cref="Document"/> class. /// </summary> public Document() { }
代码实现－Document /// <summary> /// The title of the HTML. /// </summary> private string htmlTitle; /// <summary> /// Gets or sets a string that indicates the Title of the HTML. /// </summary> public string Title { get { return htmlTitle; } set { htmlTitle = value; } }
代码实现－Document /// <summary> /// The paragraphs in the HTML. /// </summary> private Paragraphs parasInHTML; /// <summary> /// Gets or sets a <see cref="Paragraphs"/> object that indicates the paragraphs in the HTML. /// </summary> public Paragraphs Paragraphs { get { return parasInHTML; } set { parasInHTML = value; } }
代码实现－Document /// <summary> /// Save the HTML into file. /// </summary> /// <param name="path">The path of the HTML file.</param> public void Save(string path) { } /// <summary> /// Save the HTML into stream. /// </summary> /// <param name="outStream">The stream that the HTML is saved to.</param> public void Save(Stream outStream) { }
代码实现－Text /// <summary> /// Represents a text in HTML document. /// </summary> public class Text : Paragraph { /// <summary> /// Initializes a new instance of the <see cref="Text"/> class. /// </summary> public Text() { } /// <summary> /// Initializes a new instance of the <see cref="Text"/> class. /// </summary> public Text(string content) { textContent = content; }
代码实现－Text /// <summary> /// The content of the Text. /// </summary> private string textContent; /// <summary> /// Gets or sets a string that indicates the content of the Text. /// </summary> public string Content { get { return textContent; } set { textContent = value; } }
代码实现－Text /// <summary> /// The font name of the Text. /// </summary> private string textFontName; /// <summary> /// Gets or sets a string that indicates the font name of the Text. /// </summary> public string FontName { get { return textFontName; } set { textFontName = value; } }
代码实现－Text /// <summary> /// The font size of the Text. /// </summary> private int textFontSize＝ 0; /// <summary> /// Gets or sets a string that indicates the font size of the Text. /// </summary> public int FontSize { get { return textFontSize; } set { textFontSize = value; } }
代码实现－Text /// <summary> /// The color of the Text. /// </summary> private string textColor; /// <summary> /// Gets or sets a string that indicates the color of the Text. /// </summary> public string Color { get { return textColor; } set { textColor = value; } }
代码实现－Image /// <summary> /// Represents an image in HTML document. /// </summary> public class Image : Paragraph { /// <summary> /// Initializes a new instance of the <see cref="Image"/> class. /// </summary> public Image() { }
代码实现－Image /// <summary> /// The source of the Image. /// </summary> private string source; /// <summary> /// Gets or sets a string that indicates the source of the Image. /// </summary> public string Src { get { return source; } set { source = value; } }
代码实现－Image /// <summary> /// The width of the image. /// </summary> private int imageWidth＝ 0; /// <summary> /// Gets or sets a string that indicates the width of the image. The unit is pixel. /// </summary> public int Width { get { return imageWidth; } set { imageWidth = value; } }
代码实现－Image /// <summary> /// The height of the image. /// </summary> private int imageHeight＝ 0; /// <summary> /// Gets or sets a string that indicates the height of the image. The unit is pixel. /// </summary> public int Height { get { return imageHeight; } set { imageHeight = value; } }
代码实现－Image /// <summary> /// Initializes a new instance of the <see cref="Image"/> class. /// </summary> /// <param name="src">The source of the image.</param> public Image(string src) { this.source = src; }
代码实现－Image /// <summary> /// Initializes a new instance of the <see cref="Image"/> class. /// </summary> /// <param name="src">The source of the image.</param> /// <param name="width">The width of the image</param> /// <param name="height">The height of the image.</param> public Image(string src,int width,int height) { this.source = src; this.Width = width; this.Height = height; }
代码实现－DocumentGenerator private void WriteParagraphs() { sw.Write("<body>\n"); foreach(Paragraph para in this.htmlDoc.Paragraphs) { if (para is HTMLWriter.Text) { HTMLWriter.Text text = para as HTMLWriter.Text; TextGenerator tg = new TextGenerator(); sw.Write(tg.GenerateTextTag(text)); } else if (para is HTMLWriter.Image) { HTMLWriter.Image img = para as HTMLWriter.Image; ImageGenerator ig = new ImageGenerator(); sw.Write(ig.GenerateImageTag(img)); } sw.Write("<br />"); } sw.Write("</body>\n"); }
