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我写了这段代码:

    AssemblyName assemblyName = new AssemblyName("SamAsm");
    AssemblyBuilder assemblyBuilder =      Thread.GetDomain().DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
    TypeBuilder typeBuilder = assemblyBuilder.DefineDynamicModule("SamAsm.exe").DefineType("SamAsmType", TypeAttributes.Public);
    MethodBuilder methodBuilder1 = typeBuilder.DefineMethod("Main", MethodAttributes.Static | MethodAttributes.Public, typeof(void), new Type[] { typeof(string) });
    ILGenerator gen = methodBuilder1.GetILGenerator();
    FieldInfo field1 = typeof(Form1).GetField("TextBox1", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);

    MethodInfo method2 = typeof(Control).GetProperty("Text", BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic).GetGetMethod();
    MethodInfo method3 = typeof(String).GetMethod(
        "op_Equality",
        BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic,
        null,
        new Type[]
        {
            typeof(String),
            typeof(String)
        },
        null
    );
    MethodInfo method4 = typeof(MessageBox).GetMethod(
        "Show",
        BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic,
        null,
        new Type[]
        {
            typeof(String)
        },
        null
    );

    LocalBuilder a = gen.DeclareLocal(typeof(Boolean));

    System.Reflection.Emit.Label label42 = gen.DefineLabel();

    gen.Emit(OpCodes.Nop);
    gen.Emit(OpCodes.Ldarg_0);
    gen.Emit(OpCodes.Ldfld, field1);
    gen.Emit(OpCodes.Callvirt, method2);
    gen.Emit(OpCodes.Ldstr, "HI");
    gen.Emit(OpCodes.Call, method3);
    gen.Emit(OpCodes.Ldc_I4_0);
    gen.Emit(OpCodes.Ceq);
    gen.Emit(OpCodes.Stloc_0);
    gen.Emit(OpCodes.Ldloc_0);
    gen.Emit(OpCodes.Brtrue_S, label42);
    gen.Emit(OpCodes.Nop);
    gen.Emit(OpCodes.Ldstr, "You cracked me");
    gen.Emit(OpCodes.Call, method4);
    gen.Emit(OpCodes.Pop);
    gen.Emit(OpCodes.Nop);
    gen.MarkLabel(label42);
    gen.Emit(OpCodes.Ret);

    typeBuilder.CreateType().GetMethod("Main").Invoke(null, new string[] { null });
    assemblyBuilder.SetEntryPoint(methodBuilder1, PEFileKinds.WindowApplication);}

当我运行它停止

typeBuilder.CreateType().GetMethod("Main").Invoke(null, new string[] { null });

出现此错误:

从呼叫目的地生成的异常。

我检查了发出的 IL 代码,我认为没问题。我应该怎么做才能解决这个问题?

4

1 回答 1

1

一方面,您似乎在声明您的方法在应该采用 a 时采用字符​​串参数Form1(基于您对 的使用ldfld)。

于 2012-12-12T21:19:22.007 回答