C# CodeGenerator.Call方法代码示例

        public void SetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, LocalBuilder memberValue)
        {
            generator.Ldarg(targetObject);
            generator.Load(memberName);
            generator.Ldloc(memberValue);

            // Type originalType = memberValue.LocalType.IsEnum ? typeof(int) : memberValue.LocalType;
            if (memberValue.LocalType.IsValueType)
            {
                generator.Box(memberValue.LocalType.IsEnum ? typeof(int) : memberValue.LocalType);
            }
            //���ֵΪ�գ����ܵ���ToString
            generator.Load(null);
            generator.If(Cmp.NotEqualTo);
            generator.Ldloc(memberValue);

            // Type originalType = memberValue.LocalType.IsEnum ? typeof(int) : memberValue.LocalType;
            if (memberValue.LocalType.IsValueType)
            {
                generator.Box(memberValue.LocalType.IsEnum ? typeof(int) : memberValue.LocalType);
            }
            generator.Call(typeof(object).GetMethod("ToString", Type.EmptyTypes));
            generator.Else();
            generator.LoadDefaultValue(memberValue.LocalType);
            if (memberValue.LocalType.IsValueType)
            {
                generator.Box(memberValue.LocalType.IsEnum ? typeof(int) : memberValue.LocalType);
            }
            generator.EndIf();
            generator.Call(typeof(NameValueCollection).GetMethod("Add", new Type[] { typeof(string), typeof(string) }));
        }

        public void EndSetMembers(CodeGenerator generator, ArgBuilder targetObject)
        {
            generator.Ldarg(targetObject);
            generator.Load(null);
            generator.If(Cmp.EqualTo);
            generator.Pop();
            LocalBuilder dataRow = generator.DeclareLocal(typeof(DataRow));
            generator.Ldloc(locDataTable);
            generator.Call(typeof(DataTable).GetMethod("NewRow"));
            generator.Stloc(dataRow);

            LocalBuilder locCurrent = generator.DeclareLocal(typeof(string));
            LocalBuilder locEnumerator = generator.DeclareLocal(typeof(Dictionary<string, object>.KeyCollection.Enumerator));

            generator.Ldloc(locMemberValues);
            generator.Call(typeof(Dictionary<string, object>).GetMethod("get_Keys"));
            generator.Call(typeof(Dictionary<string, object>.KeyCollection).GetMethod("GetEnumerator"));
            generator.Stloc(locEnumerator);
            MethodInfo getCurrentMethod = typeof(Dictionary<string, object>.KeyCollection.Enumerator).GetMethod("get_Current");
            MethodInfo moveNextMethod = typeof(Dictionary<string, object>.KeyCollection.Enumerator).GetMethod("MoveNext");
            generator.ForEach(locCurrent, typeof(string), typeof(Dictionary<string, object>.KeyCollection.Enumerator), locEnumerator, getCurrentMethod);

            generator.Ldloc(dataRow);
            generator.Ldloc(locCurrent);

            generator.Ldloc(locMemberValues);
            generator.Ldloc(locCurrent);
            generator.Call(typeof(Dictionary<string, object>).GetMethod("get_Item"));

            generator.Call(typeof(DataRow).GetMethod("set_Item", new Type[] { typeof(string), typeof(object) }));
            generator.EndForEach(moveNextMethod);
            generator.Ldloc(dataRow);
            generator.EndIf();
        }

        public void GetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, ref LocalBuilder memberValue)
        {
            LocalBuilder locValue = generator.DeclareLocal(typeof(string));
            Type targetType = memberValue.LocalType;
            Type originalType = ConvertorGeneratorHelper.GetOriginalType(targetType);

            generator.Ldarg(targetObject);
            generator.Load(memberName);
            generator.Call(typeof(NameValueCollection).GetMethod("get_Item", new Type[] { typeof(string) }));
            generator.Stloc(locValue);

            if (targetType.IsAssignableFrom(typeof(string)))
            {
                generator.Ldloc(locValue);
                generator.Stloc(memberValue);
                return;
            }
            else
            {
                generator.Ldloc(locValue);
                generator.Call(typeof(string).GetMethod("IsNullOrEmpty"));
                generator.Load(true);
                generator.If(Cmp.NotEqualTo);
                if (targetType == typeof(Guid))
                {
                    generator.Ldloc(locValue);
                    generator.New(typeof(Guid).GetConstructor(new Type[] { typeof(string) }));
                    generator.Stloc(memberValue);
                }
                else
                {
                    MethodInfo parseMethod = targetType.GetMethod("Parse", new Type[] { typeof(string) });
                    if (parseMethod != null)
                    {
                        generator.Ldloc(locValue);
                        generator.Call(parseMethod);
                        generator.Stloc(memberValue);
                    }
                    else
                    {
                        generator.Ldloc(locValue);
                        generator.Load(originalType);
                        generator.Call(typeof(Convert).GetMethod("ChangeType", new Type[] { typeof(object), typeof(Type) }));
                        if (targetType.IsValueType)
                        {
                            generator.UnboxAny(targetType);
                        }
                        generator.Stloc(memberValue);
                    }
                }
                generator.Else();
                generator.LoadDefaultValue(targetType);
                generator.Stloc(memberValue);
                generator.EndIf();
            }
        }

            public JsonFormatClassReaderDelegate GenerateClassReader(ClassDataContract classContract)
            {
                _ilg = new CodeGenerator();
                bool memberAccessFlag = classContract.RequiresMemberAccessForRead(null);
                try
                {
                    BeginMethod(_ilg, "Read" + DataContract.SanitizeTypeName(classContract.StableName.Name) + "FromJson", typeof(JsonFormatClassReaderDelegate), memberAccessFlag);
                }
                catch (SecurityException securityException)
                {
                    if (memberAccessFlag)
                    {
                        classContract.RequiresMemberAccessForRead(securityException);
                    }
                    else
                    {
                        throw;
                    }
                }
                InitArgs();
                CreateObject(classContract);
                _ilg.Call(_contextArg, XmlFormatGeneratorStatics.AddNewObjectMethod, _objectLocal);
                InvokeOnDeserializing(classContract);
                if (classContract.IsISerializable)
                    ReadISerializable(classContract);
                else
                    ReadClass(classContract);

                if (Globals.TypeOfIDeserializationCallback.IsAssignableFrom(classContract.UnderlyingType))
                {
                    _ilg.Call(_objectLocal, JsonFormatGeneratorStatics.OnDeserializationMethod, null);
                }

                InvokeOnDeserialized(classContract);
                if (!InvokeFactoryMethod(classContract))
                {
                    _ilg.Load(_objectLocal);
                    // Do a conversion back from DateTimeOffsetAdapter to DateTimeOffset after deserialization.
                    // DateTimeOffsetAdapter is used here for deserialization purposes to bypass the ISerializable implementation
                    // on DateTimeOffset; which does not work in partial trust.

                    if (classContract.UnderlyingType == Globals.TypeOfDateTimeOffsetAdapter)
                    {
                        _ilg.ConvertValue(_objectLocal.LocalType, Globals.TypeOfDateTimeOffsetAdapter);
                        _ilg.Call(XmlFormatGeneratorStatics.GetDateTimeOffsetMethod);
                        _ilg.ConvertValue(Globals.TypeOfDateTimeOffset, _ilg.CurrentMethod.ReturnType);
                    }
                    //Copy the KeyValuePairAdapter<K,T> to a KeyValuePair<K,T>. 
                    else if (classContract.IsKeyValuePairAdapter)
                    {
                        _ilg.Call(classContract.GetKeyValuePairMethodInfo);
                        _ilg.ConvertValue(Globals.TypeOfKeyValuePair.MakeGenericType(classContract.KeyValuePairGenericArguments), _ilg.CurrentMethod.ReturnType);
                    }
                    else
                    {
                        _ilg.ConvertValue(_objectLocal.LocalType, _ilg.CurrentMethod.ReturnType);
                    }
                }
                return (JsonFormatClassReaderDelegate)_ilg.EndMethod();
            }

 public void SetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, LocalBuilder memberValue)
 {
     generator.Ldarg(targetObject);
     generator.Load(memberName);
     generator.Ldloc(memberValue);
     if (memberValue.LocalType.IsValueType)
     {
         generator.Box(memberValue.LocalType.IsEnum ? typeof(int) : memberValue.LocalType);
     }
     generator.Call(typeof(IDictionary).GetMethod("Add"));
 }

        public void GetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, ref LocalBuilder memberValue)
        {
            Type inputType = targetObject.ArgType;
            MemberInfo memberInfo = ConvertorGeneratorHelper.GetMemberInfo(inputType, memberName);
            if (memberInfo == null)
            {
                return;
            }
            Type srcMemberType = ConvertorGeneratorHelper.GetMemberType(memberInfo);
            Type destMemberType = memberValue.LocalType;
            if (memberValue.LocalType.IsAssignableFrom(srcMemberType))
            {
                generator.Ldarg(targetObject);
                generator.LoadMember(memberInfo);
                generator.Stloc(memberValue);
                return;
            }

            Type converTargetType = ConvertorGeneratorHelper.GetOriginalType(destMemberType);

            Type convertSourceType = ConvertorGeneratorHelper.GetOriginalType(srcMemberType);

            //ת������
            if (typeof(IConvertible).IsAssignableFrom(convertSourceType))
            {
                generator.Ldarg(targetObject);
                generator.LoadMember(memberInfo);
                if (convertSourceType.IsValueType)
                {
                    generator.Box(srcMemberType);
                }
                //�Ƿ�Ϊ��
                generator.Load(null);
                generator.If(Cmp.NotEqualTo);
                //�����Ϊ�գ���������ת��
                generator.Ldarg(targetObject);
                generator.LoadMember(memberInfo);
                if (convertSourceType.IsValueType)
                {
                    generator.Box(srcMemberType);
                }
                generator.Load(converTargetType);
                generator.Call(typeof(Convert).GetMethod("ChangeType", new Type[] { typeof(object), typeof(Type) }));
                if (destMemberType.IsValueType)
                {
                    generator.UnboxAny(destMemberType);
                }
                generator.Stloc(memberValue);
                //���Ϊ�գ������Ĭ��ֵ
                generator.Else();
                generator.LoadDefaultValue(destMemberType);
                generator.Stloc(memberValue);
                generator.EndIf();
            }
        }

            public JsonFormatClassReaderDelegate GenerateClassReader(ClassDataContract classContract)
            {
                ilg = new CodeGenerator();
                bool memberAccessFlag = classContract.RequiresMemberAccessForRead(null);
                try
                {
                    BeginMethod(ilg, "Read" + classContract.StableName.Name + "FromJson", typeof(JsonFormatClassReaderDelegate), memberAccessFlag);
                }
                catch (SecurityException securityException)
                {
                    if (memberAccessFlag && securityException.PermissionType.Equals(typeof(ReflectionPermission)))
                    {
                        classContract.RequiresMemberAccessForRead(securityException);
                    }
                    else
                    {
                        throw;
                    }
                }
                InitArgs();
                DemandSerializationFormatterPermission(classContract);
                DemandMemberAccessPermission(memberAccessFlag);
                CreateObject(classContract);
                ilg.Call(contextArg, XmlFormatGeneratorStatics.AddNewObjectMethod, objectLocal);
                InvokeOnDeserializing(classContract);
                if (classContract.IsISerializable)
                    ReadISerializable(classContract);
                else
                    ReadClass(classContract);
                if (Globals.TypeOfIDeserializationCallback.IsAssignableFrom(classContract.UnderlyingType))
                    ilg.Call(objectLocal, JsonFormatGeneratorStatics.OnDeserializationMethod, null);
                InvokeOnDeserialized(classContract);
                if (!InvokeFactoryMethod(classContract))
                {
                    ilg.Load(objectLocal);
                    // Do a conversion back from DateTimeOffsetAdapter to DateTimeOffset after deserialization.
                    // DateTimeOffsetAdapter is used here for deserialization purposes to bypass the ISerializable implementation
                    // on DateTimeOffset; which does not work in partial trust.

                    if (classContract.UnderlyingType == Globals.TypeOfDateTimeOffsetAdapter)
                    {
                        ilg.ConvertValue(objectLocal.LocalType, Globals.TypeOfDateTimeOffsetAdapter);
                        ilg.Call(XmlFormatGeneratorStatics.GetDateTimeOffsetMethod);
                        ilg.ConvertValue(Globals.TypeOfDateTimeOffset, ilg.CurrentMethod.ReturnType);
                    }
                    else
                    {
                        ilg.ConvertValue(objectLocal.LocalType, ilg.CurrentMethod.ReturnType);
                    }
                }
                return (JsonFormatClassReaderDelegate)ilg.EndMethod();
            }

        public void GetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, ref LocalBuilder memberValue)
        {
            LocalBuilder tempLocal = generator.DeclareLocal(typeof(object), "dataColumn");
            Type targetType = memberValue.LocalType;
            Type originalType = ConvertorGeneratorHelper.GetOriginalType(targetType);

            generator.Ldarg(targetObject);
            generator.Load(memberName);
            generator.Call(typeof(DataRow).GetMethod("get_Item", new Type[] { typeof(string) }));
            generator.Stloc(tempLocal);

            generator.Ldloc(tempLocal);
            generator.LoadMember(typeof(DBNull).GetField("Value", BindingFlags.Static | BindingFlags.Public));
            generator.If(Cmp.EqualTo);
            generator.LoadDefaultValue(targetType);
            generator.Stloc(memberValue);
            generator.Else();
            generator.Ldloc(tempLocal);

            generator.InternalILGenerator.Emit(OpCodes.Isinst, targetType);
            generator.InternalILGenerator.Emit(OpCodes.Ldnull);
            generator.InternalILGenerator.Emit(OpCodes.Cgt_Un);
            generator.Load(true);
            generator.If(Cmp.EqualTo);
            generator.Ldloc(tempLocal);
            if (targetType.IsValueType)
            {
                generator.UnboxAny(targetType);
            }
            generator.Stloc(memberValue);
            generator.Else();
            if (targetType == typeof(Guid))
            {
                generator.Ldloc(tempLocal);
                generator.InternalILGenerator.Emit(OpCodes.Isinst, typeof(string));
                generator.InternalILGenerator.Emit(OpCodes.Ldnull);
                generator.InternalILGenerator.Emit(OpCodes.Cgt_Un);
                generator.Load(true);
                generator.If(Cmp.EqualTo);
                generator.Ldloc(tempLocal);
                generator.New(typeof(Guid).GetConstructor(new Type[] { typeof(string) }));
                generator.Stloc(memberValue);
            }
            else
            {
                generator.Ldloc(tempLocal);
                generator.InternalILGenerator.Emit(OpCodes.Isinst, typeof(IConvertible));
                generator.InternalILGenerator.Emit(OpCodes.Ldnull);
                generator.InternalILGenerator.Emit(OpCodes.Cgt_Un);
                generator.Load(true);
                generator.If(Cmp.EqualTo);
                generator.Ldloc(tempLocal);
                generator.Load(originalType);
                generator.Call(typeof(Convert).GetMethod("ChangeType", new Type[] { typeof(object), typeof(Type) }));
                if (targetType.IsValueType)
                {
                    generator.UnboxAny(targetType);
                }
                generator.Stloc(memberValue);
            }
            generator.Else();
            generator.LoadDefaultValue(targetType);
            generator.Stloc(memberValue);
            generator.EndIf();
            generator.EndIf();
            generator.EndIf();
        }

        public void GetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, ref LocalBuilder memberValue)
        {
            MethodInfo getMethod;
            bool mustBeUnBox = false;

            switch (Type.GetTypeCode(memberValue.LocalType))
            {
                case TypeCode.Boolean:
                    getMethod = typeof(IDataRecord).GetMethod("GetBoolean");
                    break;
                case TypeCode.Byte:
                    getMethod = typeof(IDataRecord).GetMethod("GetByte");
                    break;
                case TypeCode.Char:
                    getMethod = typeof(IDataRecord).GetMethod("GetChar");
                    break;
                case TypeCode.DateTime:
                    getMethod = typeof(IDataRecord).GetMethod("GetDateTime");
                    break;
                case TypeCode.Decimal:
                    getMethod = typeof(IDataRecord).GetMethod("GetDecimal");
                    break;
                //Teddy 2008-2-2: commented the lines below, because for some database, return data type of float or real could always be System.Single or System.Double
                //case TypeCode.Double:
                //    getMethod = typeof(IDataRecord).GetMethod("GetDouble");
                //    break;
                //case TypeCode.Single:
                //    getMethod = typeof(IDataRecord).GetMethod("GetFloat");
                //    break;
                case TypeCode.Int16:
                    getMethod = typeof(IDataRecord).GetMethod("GetInt16");
                    break;
                case TypeCode.Int32:
                    getMethod = typeof(IDataRecord).GetMethod("GetInt32");
                    break;
                case TypeCode.Int64:
                    getMethod = typeof(IDataRecord).GetMethod("GetInt64");
                    break;
                case TypeCode.String:
                    getMethod = typeof(IDataRecord).GetMethod("GetString");
                    break;
                default:
                    getMethod = typeof(IDataRecord).GetMethod("GetValue");
                    mustBeUnBox = true;
                    break;
            }
            if (memberValue.LocalType == typeof(Guid))
            {
                getMethod = typeof(IDataRecord).GetMethod("GetGuid");
                mustBeUnBox = false;
            }
            if (memberValue.LocalType.IsEnum)
            {
                getMethod = typeof(IDataRecord).GetMethod("GetValue");
                mustBeUnBox = true;
            }

            generator.Ldarg(targetObject);
            generator.Load(memberName);
            generator.Call(typeof(IDataRecord).GetMethod("GetOrdinal"));
            LocalBuilder fieldOrdinalLoc = generator.DeclareLocal(typeof(int));
            generator.Stloc(fieldOrdinalLoc);
            generator.Ldarg(targetObject);
            generator.Ldloc(fieldOrdinalLoc);
            generator.Call(typeof(IDataRecord).GetMethod("IsDBNull"));
            generator.IfNot();
            generator.Ldarg(targetObject);
            generator.Ldloc(fieldOrdinalLoc);
            generator.Call(getMethod);

            //Teddy 2008-2-2: added the  code section below to convert the object to the memberValue.LocalType
            if (!memberValue.LocalType.IsEnum && getMethod == typeof(IDataRecord).GetMethod("GetValue"))
            {
                generator.Load(Type.GetTypeCode(memberValue.LocalType));
                generator.Call(typeof(Convert).GetMethod("ChangeType", BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(object), typeof(TypeCode) }, null));
            }

            if (memberValue.LocalType.IsValueType && mustBeUnBox)
            {
                generator.UnboxAny(memberValue.LocalType);
            }
            generator.Else();
            generator.LoadDefaultValue(memberValue.LocalType);
            generator.EndIf();
            generator.Stloc(memberValue);
        }

        /// <summary>
        /// Do GetStaticMethodDelegate
        /// </summary>
        /// <param name="targetModule"></param>
        /// <param name="genericMethodInfo"></param>
        /// <param name="genericParameterTypes"></param>
        /// <returns></returns>
        protected static StaticDynamicMethodProxyHandler DoGetStaticMethodDelegate(
            Module targetModule, 
            MethodInfo genericMethodInfo, 
            params Type[] genericParameterTypes)
        {
            #region Check preconditions

            Check.Require(targetModule, "targetModule");
            Check.Require(genericMethodInfo, "genericMethodInfo");
            Check.Require((genericParameterTypes == null && genericMethodInfo.GetGenericArguments().Length == 0) ||
                genericParameterTypes.Length == genericMethodInfo.GetGenericArguments().Length,
                "The number of generic type parameter of genericMethodInfo and the input types must equal!");
            Check.Require(genericMethodInfo.IsStatic, "genericMethodInfo must be static here!");

            #endregion

            //Create a dynamic method proxy delegate used to call the specified methodinfo
            CodeGenerator gen = new CodeGenerator(targetModule);
            gen.BeginMethod("dm" + Guid.NewGuid().ToString("N"), typeof(StaticDynamicMethodProxyHandler));
            MethodInfo makeGenericMethodInfo = MakeMethodGeneric(genericMethodInfo, genericParameterTypes);
            LoadParameters(gen, makeGenericMethodInfo.GetParameters(), true);
            gen.Call(makeGenericMethodInfo);
            CastValueToObject(gen, makeGenericMethodInfo.ReturnType);

            return (StaticDynamicMethodProxyHandler)gen.EndMethod();
        }

        public void SetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, LocalBuilder memberValue)
        {
            generator.Ldarg(targetObject);
            if (memberValue.LocalType.FullName.StartsWith("System.Nullable`1["))
            {
                generator.Ldloc(memberValue);
                generator.Load(null);
                generator.If(Cmp.EqualTo);
                generator.LoadMember(typeof(DBNull).GetField("Value"));
                generator.Stloc(memberValue);
                generator.EndIf();
            }
            generator.Load(null);

            generator.If(Cmp.EqualTo);
            PropertyInfo columns = typeof(DataTable).GetProperty("Columns");
            generator.Ldloc(locDataTable);
            generator.LoadMember(columns);
            generator.Load(memberName);
            generator.Ldtoken(CommonUtils.GetOriginalTypeOfNullableType(memberValue.LocalType.IsEnum ? typeof(int) : memberValue.LocalType));
            generator.Call(typeof(Type).GetMethod("GetTypeFromHandle", new Type[] { typeof(RuntimeTypeHandle) }));
            generator.Call(typeof(DataColumnCollection).GetMethod("Add", new Type[] { typeof(string), typeof(Type) }));
            generator.Pop();

            generator.Ldloc(locMemberValues);
            generator.Load(memberName);
            generator.Ldloc(memberValue);
            if (memberValue.LocalType.IsValueType)
            {
                generator.Box(memberValue.LocalType.IsEnum ? typeof(int) : memberValue.LocalType);
            }
            generator.Call(typeof(Dictionary<string, object>).GetMethod("Add"));
            generator.Else();
            generator.Ldarg(targetObject);
            generator.Load(memberName);
            generator.Ldloc(memberValue);
            if (memberValue.LocalType.IsValueType)
            {
                generator.Box(memberValue.LocalType);
            }
            generator.Call(typeof(DataRow).GetMethod("set_Item", new Type[] { typeof(string), typeof(object) }));
            generator.EndIf();
        }