C# DynamicMethod.ToString方法代码示例

        static void DynamicCreateMethod()
        {
            // Create an array that specifies the types of the parameters
            // of the dynamic method. This dynamic method has a String
            // parameter and an Integer parameter.
            Type[] helloArgs = { typeof(string), typeof(int) };

            // Create a dynamic method with the name "Hello", a return type
            // of Integer, and two parameters whose types are specified by
            // the array helloArgs. Create the method in the module that
            // defines the String class.
            DynamicMethod hello = new DynamicMethod("Hello",
                typeof(int),
                helloArgs,
                typeof(string).Module);

            // Create an array that specifies the parameter types of the
            // overload of Console.WriteLine to be used in Hello.
            Type[] writeStringArgs = { typeof(string) };
            // Get the overload of Console.WriteLine that has one String parameter.
            MethodInfo writeString = typeof(Console).GetMethod("WriteLine", writeStringArgs);

            // Get an ILGenerator and emit a body for the dynamic method,
            // using a stream size larger than the IL that will be emitted.
            ILGenerator il = hello.GetILGenerator(256);
            // Load the first argument, which is a string, onto the stack.
            il.Emit(OpCodes.Ldarg_0);
            // Call the overload of Console.WriteLine that prints a string.
            il.EmitCall(OpCodes.Call, writeString, null);
            // The Hello method returns the value of the second argument;
            // to do this, load the onto the stack and return.
            il.Emit(OpCodes.Ldarg_1);
            il.Emit(OpCodes.Ret);

            // Display MethodAttributes for the dynamic method, set when
            // the dynamic method was created.
            Console.WriteLine("\r\nMethod Attributes: {0}", hello.Attributes);

            // Display the calling convention of the dynamic method, set when the dynamic method was created.
            Console.WriteLine("\r\nCalling convention: {0}", hello.CallingConvention);

            // Display the declaring type, which is always null for dynamic methods.
            if (hello.DeclaringType == null)
                Console.WriteLine("\r\nDeclaringType is always null for dynamic methods.");
            else
                Console.WriteLine("DeclaringType: {0}", hello.DeclaringType);

            // Display the default value for InitLocals.
            if (hello.InitLocals)
                Console.Write("\r\nThis method contains verifiable code.");
            else
                Console.Write("\r\nThis method contains unverifiable code.");
            Console.WriteLine(" (InitLocals = {0})", hello.InitLocals);

            // Display the module specified when the dynamic method was created.
            Console.WriteLine("\r\nModule: {0}", hello.Module);

            // Display the name specified when the dynamic method was created.
            // Note that the name can be blank.
            Console.WriteLine("\r\nName: {0}", hello.Name);

            // For dynamic methods, the reflected type is always null.
            if (hello.ReflectedType == null)
                Console.WriteLine("\r\nReflectedType is null.");
            else
                Console.WriteLine("\r\nReflectedType: {0}", hello.ReflectedType);
            if (hello.ReturnParameter == null)
                Console.WriteLine("\r\nMethod has no return parameter.");
            else
                Console.WriteLine("\r\nReturn parameter: {0}", hello.ReturnParameter);
            // If the method has no return type, ReturnType is System.Void.
            Console.WriteLine("\r\nReturn type: {0}", hello.ReturnType);

            // ReturnTypeCustomAttributes returns an ICustomeAttributeProvider
            // that can be used to enumerate the custom attributes of the
            // return value. At present, there is no way to set such custom
            // attributes, so the list is empty.
            if (hello.ReturnType == typeof(void))
                Console.WriteLine("The method has no return type.");
            else
            {
                ICustomAttributeProvider caProvider = hello.ReturnTypeCustomAttributes;
                object[] returnAttributes = caProvider.GetCustomAttributes(true);
                if (returnAttributes.Length == 0)
                    Console.WriteLine("\r\nThe return type has no custom attributes.");
                else
                {
                    Console.WriteLine("\r\nThe return type has the following custom attributes:");
                    foreach (object attr in returnAttributes)
                    {
                        Console.WriteLine("\t{0}", attr.ToString());
                    }
                }
            }

            Console.WriteLine("\r\nToString: {0}", hello.ToString());

            // Add parameter information to the dynamic method. (This is not
            // necessary, but can be useful for debugging.) For each parameter,
            // identified by position, supply the parameter attributes and a
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