74 lines
3.1 KiB
C#
74 lines
3.1 KiB
C#
// ----------------------------------------------------------------------------
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ----------------------------------------------------------------------------
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//=====================================================================
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//=====================================================================
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using System;
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using System.Threading;
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using System.Reflection;
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using System.Reflection.Emit;
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public class App {
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public static void Main(String[] args) {
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AssemblyBuilder assembly;
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assembly = (AssemblyBuilder) CreateCallee(Thread.GetDomain(), AssemblyBuilderAccess.Save).Assembly;
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assembly.Save("EmittedAssembly.dll");
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}
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// Create the callee transient dynamic assembly.
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private static Type CreateCallee(AppDomain appDomain) {
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// Create a simple name for the callee assembly.
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AssemblyName assemblyName = new AssemblyName();
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assemblyName.Name = "EmittedAssembly";
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// Create the callee dynamic assembly.
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AssemblyBuilder assembly = appDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Save);
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// Create a dynamic module named "CalleeModule" in the callee assembly.
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ModuleBuilder module;
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module = assembly.DefineDynamicModule("EmittedModule", "EmittedModule.mod");
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// Define a public class named "HelloWorld" in the assembly.
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TypeBuilder helloWorldClass = module.DefineType("HelloWorld", TypeAttributes.Public);
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// Define a private String field named "Greeting" in the type.
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FieldBuilder greetingField = helloWorldClass.DefineField("Greeting", typeof(String), FieldAttributes.Private);
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// Create the constructor.
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Type[] constructorArgs = { typeof(String) };
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ConstructorBuilder constructor = helloWorldClass.DefineConstructor(
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MethodAttributes.Public, CallingConventions.Standard, constructorArgs);
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// Generate IL for the method. The constructor calls its superclass
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// constructor. The constructor stores its argument in the private field.
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ILGenerator constructorIL = constructor.GetILGenerator();
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constructorIL.Emit(OpCodes.Ldarg_0);
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ConstructorInfo superConstructor = typeof(Object).GetConstructor(new Type[0]);
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constructorIL.Emit(OpCodes.Call, superConstructor);
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constructorIL.Emit(OpCodes.Ldarg_0);
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constructorIL.Emit(OpCodes.Ldarg_1);
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constructorIL.Emit(OpCodes.Stfld, greetingField);
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constructorIL.Emit(OpCodes.Ret);
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// Create the GetGreeting method.
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MethodBuilder getGreetingMethod = helloWorldClass.DefineMethod("GetGreeting",
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MethodAttributes.Public, typeof(String), null);
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// Generate IL for GetGreeting.
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ILGenerator methodIL = getGreetingMethod.GetILGenerator();
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methodIL.Emit(OpCodes.Ldarg_0);
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methodIL.Emit(OpCodes.Ldfld, greetingField);
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methodIL.Emit(OpCodes.Ret);
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// Bake the class HelloWorld.
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return(helloWorldClass.CreateType());
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}
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}
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