简单的C#代码解释器

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;  
}  
}  
} 
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