using System; using System.Collections; using System.Text; using System.IO; using System.Collections.Specialized; using System.Text.RegularExpressions; using System.Diagnostics; namespace CSS { public class App { public static void Main(string[] args) { //初始化CSS解析器 CssDocument doc = new CssDocument(); //加载现有CSS文件 doc.Load(Directory.GetCurrentDirectory() + "/test.css"); //修改CSS doc["body"].Attributes["font-size"] = "12px"; //保存CSS文件 doc.Save(Directory.GetCurrentDirectory() + "/a.css"); Console.Read(); } } public class CssParse { private string m_source; private int m_idx; public static bool IsWhiteSpace(char ch) { return( "\t\n\r ".IndexOf(ch) != -1 ); } public void EatWhiteSpace() { while ( !Eof() ) { if ( !IsWhiteSpace(GetCurrentChar()) ) return; m_idx++; } } public bool Eof() { return(m_idx>=m_source.Length ); } public string ParseElementName() { StringBuilder element = new StringBuilder(); EatWhiteSpace(); while ( !Eof() ) { if (GetCurrentChar()=='{') { m_idx++; break; } element.Append(GetCurrentChar()); m_idx++; } EatWhiteSpace(); return element.ToString().Trim(); } public string ParseAttributeName() { StringBuilder attribute = new StringBuilder(); EatWhiteSpace(); while ( !Eof() ) { if (GetCurrentChar()==':') { m_idx++; break; } attribute.Append(GetCurrentChar()); m_idx++; } EatWhiteSpace(); return attribute.ToString().Trim(); } public string ParseAttributeValue() { StringBuilder attribute = new StringBuilder(); EatWhiteSpace(); while ( !Eof() ) { if (GetCurrentChar()==';') { m_idx++; break; } attribute.Append(GetCurrentChar()); m_idx++; } EatWhiteSpace(); return attribute.ToString().Trim(); } public char GetCurrentChar() { return GetCurrentChar(0); } public char GetCurrentChar(int peek) { if( (m_idx+peek)<m_source.Length ) return m_source[m_idx+peek]; else return (char)0; } public char AdvanceCurrentChar() { return m_source[m_idx++]; } public void Advance() { m_idx++; } public string Source { get { return m_source; } set { m_source = value; } } public ArrayList Parse() { ArrayList elements = new ArrayList(); while (!Eof()) { string elementName = ParseElementName(); if (elementName == null) break; CssElement element = new CssElement(elementName); string name = ParseAttributeName(); string value = ParseAttributeValue(); while (name != null && value != null) { element.Add(name, value); EatWhiteSpace(); if (GetCurrentChar()=='}') { m_idx++; break; } name = ParseAttributeName(); value = ParseAttributeValue(); } elements.Add(element); } return elements; } } public class CssDocument { private string _Text; public string Text { get { return _Text; } set { _Text = value; } } private ArrayList _Elements; public ArrayList Elements { get { return _Elements; } set { _Elements = value; } } public CssElement this[string name] { get { for (int i = 0; i < Elements.Count; i++) { if (((CssElement)Elements[i]).Name.Equals(name)) return (CssElement)Elements[i]; } return null; } } private string _File; public string File { get { return _File; } set { _File = value; } } public CssDocument() { } public void Load(string file) { using (StreamReader sr = new StreamReader(file)) { Text = sr.ReadToEnd(); sr.Close(); } CssParse parse = new CssParse(); parse.Source = Regex.Replace(Text, @"/\*.*?\*/", "", RegexOptions.Compiled); Elements = parse.Parse(); } public void Add(CssElement element) { Elements.Add(element); } public void Save() { Save(this.File); } public void Save(string file) { using (StreamWriter sw = new StreamWriter(file, false)) { for (int i = 0; i < Elements.Count; i++) { CssElement element = (CssElement)Elements[i]; sw.WriteLine(element.Name + " {"); foreach (string name in element.Attributes.AllKeys) { sw.WriteLine("\t{0}:{1};", name, element.Attributes[name]); } sw.WriteLine("}"); } sw.Flush(); sw.Close(); } } } public class CssElement { private string _Name; public string Name { get { return _Name; } set { _Name = value; } } private NameValueCollection _Attributes; public NameValueCollection Attributes { get { return _Attributes; } set { _Attributes = value; } } public CssElement(string name) { this.Name = name; Attributes = new NameValueCollection(); } public void Add(string attribute, string value) { Attributes[attribute] = value; } } }