C#实现动态生成静态页面的类详解

 using System; using System.Collections.Generic; using System.Text; using System.Text.RegularExpressions; using System.Collections; using System.IO; /// 
 /// 表示一个文本模板，该类使用一个字符串作为模板，通过将模板中的标志替换为对应的值（模板中的标志用 {标志名} 表示）生成新的文本 /// 
 /// 以下代码用文本模板生成IMG标志 ///  /// static class Program /// { ///  [STAThread] ///  static void Main() ///  { ///   TextTemplate temp = new TextTemplate(""); ///   Console.WriteLine(temp.Render("pic.bmp","Image")); ///   Hashtable values = new Hashtable(); ///   values.Add("src", "pic.bmp"); ///   values.Add("alt", "image"); ///   Console.WriteLine(temp.Render(values)); ///  } /// } /// /// 输出为： ///  ///  /// ///  ///  public class TextTemplate { TextTemplateTag[] _tags; String[] _contentParts; int _tagCount; private TextTemplate() { _tagCount = 0; _tags = null; _contentParts = null; } /// 
 /// 用指定的模板初始化TextTemplate /// 
 /// 模板内容 public TextTemplate(String content) { FromString(content); } /// 
 /// 用指定的模板初始化TextTemplate,模板内容重文件读入 /// 
 /// 模板文件位置 /// 文件使用的编码 public TextTemplate(string file, Encoding encoding) { StreamReader sr = new StreamReader(file, encoding); try { string content = sr.ReadToEnd(); FromString(content); } catch (Exception) { sr.Close(); throw; } sr.Close(); } /// 
 /// 读入模板并以标志为分割点分割模板 /// 
 ///  private void FromString(String content) { MatchCollection mc = Regex.Matches(content, "{\\w+}"); _tagCount = mc.Count; _tags = new TextTemplateTag[mc.Count]; _contentParts = new string[mc.Count + 1]; int index = 0; foreach (Match m in mc) { _tags[index++] = new TextTemplateTag(m.Value.Substring(1, m.Value.Length - 2), m.Index, m.Length); } int start = 0; index = 0; foreach (TextTemplateTag con in _tags) { _contentParts[index] = content.Substring(start, con.Position - start); start = con.Position + con.Length; index++; } if (start  /// 用指定的值生成文本 ///  /// 各标志对应的值（用标志名作为key） /// 生成的文本 /// 以下代码用文本模板生成IMG标志 ///  /// static class Program /// { ///  [STAThread] ///  static void Main() ///  { ///   TextTemplate temp = new TextTemplate(""); ///   Console.WriteLine(temp.Render("pic.bmp","Image")); ///   Hashtable values = new Hashtable(); ///   values.Add("src", "pic.bmp"); ///   values.Add("alt", "image"); ///   Console.WriteLine(temp.Render(values)); ///  } /// } /// /// 输出为： ///  ///  /// ///  ///  public string Render(Hashtable values) { StringBuilder result = new StringBuilder(8 * 1024); int i = 0; for (i = 0; i <_tagCount; i++) { result.Append(_contentParts[i]); if (values[_tags[i].Name] != null) result.Append(values[_tags[i].Name]); else result.Append("{" + _tags[i].Name + "}"); } result.Append(_contentParts[i]); return result.ToString(); } /// 
 /// 用指定的值生成文本 /// 
 /// 各标志对应的值(忽略标志名，第一个标志对应第一个参数，以此类推) /// 生成的文本 /// 以下代码用文本模板生成IMG标志 ///  /// static class Program /// { ///  [STAThread] ///  static void Main() ///  { ///   TextTemplate temp = new TextTemplate(""); ///   Console.WriteLine(temp.Render("pic.bmp","Image")); ///   Hashtable values = new Hashtable(); ///   values.Add("src", "pic.bmp"); ///   values.Add("alt", "image"); ///   Console.WriteLine(temp.Render(values)); ///  } /// } /// /// 输出为： ///  ///  /// ///  ///  public string Render(params object[] args) { StringBuilder result = new StringBuilder(2 * 1024); int i = 0; for (i = 0; i <_tagCount; i++) { result.Append(_contentParts[i]); result.Append(args[i].ToString()); } result.Append(_contentParts[i]); return result.ToString(); } /// 
 /// 用指定的值生成文本，并保存到文件中 /// 
 /// 要保存的文件路径 /// 文件的编码 /// 各标志对应的值（用标志名作为key） public void SaveAs(string file, Encoding encoding, Hashtable values) { StreamWriter sw = new StreamWriter(file, false, encoding); try { String content = Render(values); sw.Write(content); } catch (Exception) { sw.Close(); throw; } sw.Close(); } /// 
 /// 用指定的值生成文本，并保存到文件中 /// 
 /// 要保存的文件路径 /// 文件的编码 /// 各标志对应的值(忽略标志名，第一个标志对应第一个参数，以此类推) public void SaveAs(string file, Encoding encoding, params object[] args) { StreamWriter sw = new StreamWriter(file, false, encoding); try { String content = Render(args); sw.Write(content); } catch (Exception) { sw.Close(); throw; } sw.Close(); } /// 
 /// 将模板以指定的分隔标志分隔成小模板 /// 
 ///  ///  public TextTemplate[] Split(string splitTag) { List temps = new List(); List contentParts = new List(); List tags = new List(); int i = 0; foreach (string content in _contentParts) { contentParts.Add(content); if (i >= _tags.Length || _tags[i].Name == splitTag) { TextTemplate newTemp = new TextTemplate(); newTemp._contentParts = contentParts.ToArray(); newTemp._tags = tags.ToArray(); newTemp._tagCount = tags.Count; temps.Add(newTemp); contentParts.Clear(); tags.Clear(); } else tags.Add(new TextTemplateTag(_tags[i].Name, _tags[i].Position, _tags[i].Length)); i++; } return temps.ToArray(); } } internal class TextTemplateTag { int _position, _length; string _name; public TextTemplateTag(string name, int pos, int len) { _name = name; _position = pos; _length = len; } public string Name { get { return _name; } } public int Position { get { return _position; } } public int Length { get { return _length; } } } 

 static class Program { [STAThread] static void Main() { TextTemplate temp = new TextTemplate(""); Console.WriteLine(temp.Render("pic.bmp","Image")); Hashtable values = new Hashtable(); values.Add("src", "pic.bmp"); values.Add("alt", "image"); Console.WriteLine(temp.Render(values)); } } 

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