1using System;
  2using System.CodeDom;
  3using System.CodeDom.Compiler;
  4using Microsoft.CSharp;
  5using System.IO;
  6
  7namespace CodeDomFacade
  8{
  9    /// <summary>
 10    /// 该类封装了CodeCom相关操作，方便外部使用
 11    /// </summary>
 12    public class CodeDomHelper
 13    {
 14
 15        protected CodeCompileUnit _CodeRoot;
 16        protected CodeNamespace _cn;
 17        protected CodeDomProvider _provider;
 18        protected string _strFileName;
 19        protected CodeTypeDeclaration _ctdClass;
 20
 21        public CodeDomHelper()
 22        {
 23            _CodeRoot=new CodeCompileUnit();
 24            _ctdClass=new CodeTypeDeclaration();
 25        }
 26
 27        /// <summary>
 28        /// 生成代码输出到文件
 29        /// </summary>
 30        public void GenerateCode()
 31        {
 32            try
 33            {
 34                // Obtain an ICodeGenerator from a CodeDomProvider class.
 35                ICodeGenerator gen = _provider.CreateGenerator();
 36                // Create a TextWriter to a StreamWriter to an output file.
 37                IndentedTextWriter tw = new IndentedTextWriter(new StreamWriter(_strFileName, false), "    ");
 38                // Generate source code using the code generator.
 39                gen.GenerateCodeFromCompileUnit(_CodeRoot, tw, new CodeGeneratorOptions());
 40                // Close the output file.
 41                tw.Close();
 42            }
 43            catch(System.Exception e)
 44            {
 45                throw e;
 46            }
 47        }
 48
 49        /// <summary>
 50        /// 生成C#代码
 51        /// </summary>
 52        public void GenerateCSharpCode()
 53        {
 54            _provider=new CSharpCodeProvider();//设定生成代码为C#代码
 55            GenerateCode();//生成代码，写入指定文件
 56        }
 57        /// <summary>
 58        /// 设置代码命名空间
 59        /// </summary>
 60        /// <param name="name">命名空间名字</param>
 61        public void DefineNameSpace(string name)
 62        {
 63            try
 64            {
 65                _cn=new CodeNamespace(name);
 66                _CodeRoot.Namespaces.Add(_cn);
 67            }
 68            catch(System.Exception e)
 69            {
 70                throw e;
 71            }
 72        }
 73
 74        /// <summary>
 75        /// 添加引用命名空间
 76        /// </summary>
 77        /// <param name="name">被引用命名空间名字</param>
 78        public void AddImportNameSpace(string name)
 79        {
 80            try
 81            {
 82                _cn.Imports.Add(new CodeNamespaceImport(name));
 83            }
 84            catch(System.Exception e)
 85            {
 86                throw e;
 87            }
 88        }
 89
 90        /// <summary>
 91        /// 添加一个类
 92        /// </summary>
 93        /// <param name="classname">类名</param>
 94        public void AddClass(string classname)
 95        {
 96            try
 97            {
 98                _ctdClass.Name=classname;
 99                _cn.Types.Add(_ctdClass);
100            }
101            catch(System.Exception e)
102            {
103                throw e;
104            }
105        }
106
107        /// <summary>
108        /// 添加一个方法到类
109        /// </summary>
110        /// <param name="methodname">方法名</param>
111        /// <param name="returntype">返回值类型，如"System.Int32"</param>
112        /// <param name="visit">访问控制类型"public" or "private"</param>
113        public CodeMemberMethod AddMethod(string methodname,string returntype,string visit)
114        {
115            CodeMemberMethod cmm=new CodeMemberMethod();
116            try
117            {
118                cmm.Name=methodname;
119                cmm.ReturnType =new CodeTypeReference(returntype);
120                switch(visit)
121                {
122                    case "public":
123                        cmm.Attributes=MemberAttributes.Public|MemberAttributes.Final; 
124                        break;
125                    case "private":
126                        cmm.Attributes=MemberAttributes.Private|MemberAttributes.Final; 
127                        break;
128                    default:
129                        cmm.Attributes=MemberAttributes.Private|MemberAttributes.Final; 
130                        break;
131                }
132            
133                _ctdClass.Members.Add(cmm);
134            }
135            catch(System.Exception e)
136            {
137                throw e;
138            }
139            return cmm;
140        }
141
142        /// <summary>
143        /// 添加带有普通的get/set操作属性
144        /// </summary>
145        /// <param name="pname">属性名</param>
146        /// <param name="returntype">返回值类型</param>
147        /// <param name="visit">访问控制类型</param>
148        /// <param name="fieldname">访问字段名</param>
149        /// <returns>返回添加的属性，待以后操作，如添加原代码段</returns>
150        public CodeMemberProperty AddProperty(string pname,string returntype,string visit,string fieldname)
151        {    
152            CodeMemberProperty cmp=new CodeMemberProperty();
153            try
154            {
155                cmp.Name=pname;
156                cmp.Type=new CodeTypeReference(returntype);
157                switch(visit)
158                {
159                    case "public":
160                        cmp.Attributes=MemberAttributes.Public|MemberAttributes.Final; 
161                        break;
162                    case "private":
163                        cmp.Attributes=MemberAttributes.Private|MemberAttributes.Final; 
164                        break;
165                    default:
166                        cmp.Attributes=MemberAttributes.Private|MemberAttributes.Final; 
167                        break;
168                }
169                //添加get操作代码
170                cmp.GetStatements.Add(new CodeMethodReturnStatement(new CodeFieldReferenceExpression(new CodeThisReferenceExpression(),fieldname)));
171                //添加set操作代码
172                cmp.SetStatements.Add(new CodeAssignStatement(new CodeFieldReferenceExpression(new CodeThisReferenceExpression(),fieldname),new CodePropertySetValueReferenceExpression()));
173                _ctdClass.Members.Add(cmp);
174            }
175            catch(System.Exception e)
176            {
177                throw e;
178            }
179            return cmp;
180        }
181
182        /// <summary>
183        /// 添加字段
184        /// </summary>
185        /// <param name="name">字段名</param>
186        /// <param name="type">字段类型</param>
187        /// <param name="visit">访问控制类型</param>
188        /// <param name="IsCreateProperty">是否生成对应属性</param>
189        public void AddField(string name,string type,string visit,bool IsCreateProperty)
190        {
191            CodeMemberField cmf=new CodeMemberField(type,name);
192            try
193            {
194                switch(visit)
195                {
196                    case "public":
197                        cmf.Attributes=MemberAttributes.Public|MemberAttributes.Final; 
198                        break;
199                    case "private":
200                        cmf.Attributes=MemberAttributes.Private|MemberAttributes.Final; 
201                        break;
202                    default:
203                        cmf.Attributes=MemberAttributes.Private|MemberAttributes.Final; 
204                        break;
205                }
206                _ctdClass.Members.Add(cmf);
207                if(IsCreateProperty)
208                {
209                    if(name.IndexOf("_")>0)
210                        AddProperty(name.Replace("_",""),type,"public",name);
211                    else
212                        AddProperty("p" + name,type,"public",name);
213                }
214            }
215            catch(System.Exception e)
216            {
217                throw e;
218            }
219        }
220
221        /// <summary>
222        /// 从指定文件获取代码
223        /// </summary>
224        /// <param name="filename">文件路径（包含名称）</param>
225        /// <returns></returns>
226        public string GetCodeFormFile(string filename)
227        {
228            try
229            {
230                StreamReader sr = new StreamReader(filename);
231                string result = sr.ReadToEnd();//读取文件内容到文本框
232                sr.Close();
233                return result;
234            }
235            catch(System.Exception e)
236            {
237                throw e;
238                return "读取文件出错";
239            }
240        }
241
242        /// <summary>
243        /// 添加原代码片断
244        /// </summary>
245        /// <param name="cmm">要添加的地方，如方法，入口点，结构等</param>
246        /// <param name="strCode">具体代码</param>
247        public void AddCodeSnippet(CodeMemberMethod cmm,string strCode)
248        {
249            try
250            {
251                CodeSnippetStatement codebody = null;
252                codebody = new CodeSnippetStatement(strCode);
253                cmm.Statements.Add(codebody);
254            }
255            catch(System.Exception e)
256            {
257                throw e;
258            }
259        }
260        相关属性         
321    }
322}
323

最近在看CodeDom，发现其类层次很多，而且很复杂，所以写了一个Farade模式的类，希望在以后的开发中简化使用CodeDom，但由于时间有限，所以功能不够完善，也许要在以后使用中不断完善。