C#代码解释器

来源：互联网发布：连接Mac 编辑：程序博客网时间：2024/05/10 14:15

1、C#代码解释器简介

能够动态执行 C#代码是一件很酷的功能，比如，我们可以在控制台中输入一行 C#代码，然后程序自动编译并执行这一行代码，将结果显示给我们。这差不多就是一个最简单的 C#代码解释器了。

动态执行 C#代码又是一件很有用的功能，比如，我们可以将某些代码写在某个文件之中，由程序集在执行时进行加载，改变这些代码不用中止程序，当程序再次加载这些代码时，就自动执行的是新代码了。

2、简单的 C#代码解释器

ASDF

usingSystem;  usingSystem.Collections.Generic;  usingSystem.Reflection;  usingSystem.Globalization;  usingMicrosoft.CSharp;  usingSystem.CodeDom;  usingSystem.CodeDom.Compiler;  usingSystem.Text;  usingSystem.IO;  usingSystem.Xml;   namespaceTest  {  classProgram  {  staticvoidMain(string[]args)  {  Console.Write(">>");  Stringcmd;  Contextcxt=newContext();  while((cmd=Console.ReadLine().Trim())!="exit")  {  if(!String.IsNullOrEmpty(cmd))  {  Console.WriteLine();  cxt.Invoke(cmd);  }  Console.Write("\n>>");  }  }  }   publicclassContext  {  publicCSharpCodeProviderCodeProvider{get;set;}  publicIDictionary<String,Assembly>Assemblys{get;set;}   publicContext()  {  CodeProvider=newCSharpCodeProvider(newDictionary<string,string>(){{"CompilerVersion","v3.5"}});  Assemblys=newDictionary<String,Assembly>();  Assembly[]al=AppDomain.CurrentDomain.GetAssemblies();  foreach(Assemblyainal)  {  AddAssembly(a);  }  AppDomain.CurrentDomain.AssemblyLoad+=newAssemblyLoadEventHandler(CurrentDomain_AssemblyLoad);  }   privatevoidAddAssembly(Assemblya)  {  if(a!=null)  {  Assemblys.Add(a.FullName,a);  }  }   voidCurrentDomain_AssemblyLoad(objectsender,AssemblyLoadEventArgsargs)  {  Assemblya=args.LoadedAssembly;  if(!Assemblys.ContainsKey(a.FullName))  {  AddAssembly(a);  }  }   publicCompilerParametersCreateCompilerParameters()  {  CompilerParameterscp=newCompilerParameters();  cp.GenerateExecutable=false;  cp.GenerateInMemory=true;  if(Assemblys!=null)  {  foreach(AssemblyainAssemblys.Values)  {  cp.ReferencedAssemblies.Add(a.Location);  }  }  returncp;  }   publicvoidInvoke(Stringcmd)  {  StringinputCmdString=cmd.Trim();  if(String.IsNullOrEmpty(inputCmdString))return;   StringfullCmd=BuildFullCmd(inputCmdString);   CompilerResultscr=CodeProvider.CompileAssemblyFromSource(CreateCompilerParameters(),fullCmd);   if(cr.Errors.HasErrors)  {  BooleanrecompileSwitch=true;   foreach(CompilerErrorerrincr.Errors)  {  //CS0201:Onlyassignment,call,increment,decrement,andnewobjectexpressionscanbe  //usedasastatement  if(!err.ErrorNumber.Equals("CS0201"))  {  recompileSwitch=false;  break;  }  }   //重新编译  if(recompileSwitch)  {  StringdynaName="TempArg_Dynamic_"+DateTime.Now.Ticks.ToString();  inputCmdString=String.Format("var{0}=",dynaName)+inputCmdString;  inputCmdString+=";\nSystem.Console.WriteLine("+dynaName+");";   fullCmd=BuildFullCmd(inputCmdString);  cr=CodeProvider.CompileAssemblyFromSource(CreateCompilerParameters(),fullCmd);  }   if(cr.Errors.HasErrors)  {  Console.WriteLine("编译错误：");  foreach(CompilerErrorerrincr.Errors)  {  Console.WriteLine(err.ErrorNumber);  Console.WriteLine(err.ErrorText);  }   return;  }  }   Assemblyassem=cr.CompiledAssembly;  ObjectdynamicObject=assem.CreateInstance("Test.DynamicClass");  Typet=assem.GetType("Test.DynamicClass");  MethodInfominfo=t.GetMethod("MethodInstance");  minfo.Invoke(dynamicObject,null);  }   privateStringBuildFullCmd(StringinputCmdString)  {  StringStringfullCmd=String.Empty;   fullCmd+=@"  namespaceTest  {  publicclassDynamicClass  {  publicvoidMethodInstance()  {  "+inputCmdString+@";  }  }  }";  returnfullCmd;  }  }  }