详解.NET中的动态编译技术[4]

接下来在原来基础上需要修改的是

· 将编译成的DLL保存到磁盘中

· 创建另外的AppDomain

· 获得IRemoteInterface接口的引用（将生成的DLL加载到额外的AppDomain）

· 调用InvokeMethod方法来远程调用

· 可以通过AppDomainUnload()方法卸载程序集

以下是完整的代码演示了如何应用这一方案

//get the code to compile

string strSourceCode = thistxtSourceText;

// Create an addtional AppDomain

AppDomainSetup objSetup = new AppDomainSetup();

objSetupApplicationBase = AppDomainCurrentDomainBaseDirectory;

AppDomain objAppDomain = AppDomainCreateDomain(MyAppDomain null objSetup);

// Create a new CSharpCodePrivoder instance

CSharpCodeProvider objCSharpCodePrivoder = new CSharpCodeProvider();

// Sets the runtime compiling parameters by crating a new CompilerParameters instance

CompilerParameters objCompilerParameters = new CompilerParameters();

objCompilerParametersReferencedAssembliesAdd(Systemdll);

objCompilerParametersReferencedAssembliesAdd(SystemWindowsFormsdll);

// Load the remote loader interface

objCompilerParametersReferencedAssembliesAdd(RemoteAccessdll);

// Load the resulting assembly into memory

objCompilerParametersGenerateInMemory = false;

objCompilerParametersOutputAssembly = DynamicalCodedll;

// CompilerResults: Complile the code snippet by calling a method from the provider

CompilerResults cr = objCSharpCodePrivoderCompileAssemblyFromSource(objCompilerParameters strSourceCode);

if (crErrorsHasErrors)

{

string strErrorMsg = crErrorsCountToString() + Errors:;

for (int x = ; x < crErrorsCount; x++)

{

strErrorMsg = strErrorMsg + \r\nLine: +

crErrors[x]LineToString() + +

crErrors[x]ErrorText;

}

thistxtResultText = strErrorMsg;

MessageBoxShow(There were build erros please modify your code Compiling Error);

return;

}

// Invoke the method by using Reflection

RemoteLoaderFactory factory = (RemoteLoaderFactory)objAppDomainCreateInstance(RemoteAccessRemoteAccessRemoteLoaderFactory)Unwrap();

// with help of factory create a real LiveClass instance

object objObject = factoryCreate(DynamicalCodedll DynamiclyHelloWorld null);

if (objObject == null)

{

thistxtResultText = Error: + Couldnt load class;

return;

}

// *** Cast object to remote interface avoid loading type info

IRemoteInterface objRemote = (IRemoteInterface)objObject;

object[] objCodeParms = new object[];

objCodeParms[] = Allan;

string strResult = (string)objRemoteInvoke(GetTime objCodeParms);

thistxtResultText = strResult;

//Dispose the objects and unload the generated DLLs

objRemote = null;

AppDomainUnload(objAppDomain);

SystemIOFileDelete(DynamicalCodedll);

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