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1 using System;
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2 using System.Reflection;
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3 using System.Reflection.Emit;
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4 using System.Threading;
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5
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6 using NUnit.Framework;
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7
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8 namespace Examples.Reflection.Emit
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9 {
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10 [TestFixture]
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11 public class HelloWorldNormal
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12 {
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13 public interface IHello
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14 {
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15 void SayHello(string toWhom);
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16 }
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17
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18 [Test]
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19 public void Test()
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20 {
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21 AssemblyName asmName = new AssemblyName();
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22
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23 asmName.Name = "HelloWorld";
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24
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25 AssemblyBuilder asmBuilder =
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26 Thread.GetDomain().DefineDynamicAssembly(asmName, AssemblyBuilderAccess.RunAndSave);
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27
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28 ModuleBuilder modBuilder = asmBuilder.DefineDynamicModule("HelloWorld");
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29
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30 TypeBuilder typeBuilder = modBuilder.DefineType(
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31 "Hello",
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32 TypeAttributes.Public,
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33 typeof(object),
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34 new Type[] { typeof(IHello) });
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35
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36 MethodBuilder methodBuilder = typeBuilder.DefineMethod("SayHello",
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37 MethodAttributes.Private | MethodAttributes.Virtual,
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38 typeof(void),
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39 new Type[] { typeof(string) });
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40
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41 typeBuilder.DefineMethodOverride(methodBuilder, typeof(IHello).GetMethod("SayHello"));
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42
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43 ILGenerator il = methodBuilder.GetILGenerator();
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44
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45 // string.Format("Hello, {0} World!", toWhom)
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46 //
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47 /*[a]*/il.Emit/*[/a]*/(OpCodes.Ldstr, "Hello, {0} World!");
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48 /*[a]*/il.Emit/*[/a]*/(OpCodes.Ldarg_1);
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49 /*[a]*/il.Emit/*[/a]*/(OpCodes.Call, typeof(string).GetMethod("Format", new Type[] { typeof(string), typeof(object) }));
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50
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51 // Console.WriteLine("Hello, World!");
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52 //
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53 /*[a]*/il.Emit/*[/a]*/(OpCodes.Call, typeof(Console).GetMethod("WriteLine", new Type[] { typeof(string) }));
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54 /*[a]*/il.Emit/*[/a]*/(OpCodes.Ret);
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55
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56 Type type = typeBuilder.CreateType();
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57
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58 IHello hello = (IHello)Activator.CreateInstance(type);
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59
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60 hello.SayHello("Emit");
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61 }
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62 }
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63 }
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