Exemplo n.º 1
0
 private static void Parse(ILGenerator il, Type type)
 {
     if (type.GetTypeInfo().IsValueType)
     {
         //可空类型
         if (EmitUtil.IsNullable(type))
         {
             var realType = EmitUtil.GetNullableArg0(type);
             il.Emit(OpCodes.Call, realType.GetTypeInfo().GetMethod("Parse", new[] { typeof(string) }));
             // ReSharper disable once AssignNullToNotNullAttribute
             il.Emit(OpCodes.Newobj, type.GetTypeInfo().GetConstructor(new[] { realType }));
         }
         else
         {
             il.Emit(OpCodes.Call, type.GetTypeInfo().GetMethod("Parse", new[] { typeof(string) }));
         }
     }
 }
Exemplo n.º 2
0
        private static LocalBuilder GetRealLocal(ILGenerator il, Type type, Dictionary <Type, LocalBuilder> realValueDict)
        {
            LocalBuilder localBuilder;
            Type         realType = type;

            //可空类型或者Datetime类型,都需要将参数存储起来
            if (EmitUtil.IsNullable(type))
            {
                realType = EmitUtil.GetNullableArg0(type);
            }
            if (realValueDict.ContainsKey(realType))
            {
                localBuilder = realValueDict[realType];
            }
            else
            {
                localBuilder = il.DeclareLocal(realType);
                realValueDict.Add(realType, localBuilder);
            }
            return(localBuilder);
        }
Exemplo n.º 3
0
        private static void PropertyToString(ILGenerator il, Type type, Dictionary <Type, LocalBuilder> valueDict)
        {
            //值类型和可空类型
            if (type.GetTypeInfo().IsValueType)
            {
                //不可空类型,直接创建新的,可空类型就先从字典中取,取不到再新建

                var localBuilder = GetLocal(il, type, valueDict);
                il.Emit(OpCodes.Stloc_S, localBuilder);
                il.Emit(OpCodes.Ldloca_S, localBuilder);

                if (type == typeof(DateTime) || type == typeof(DateTime?))
                {
                    //可空datetime类型
                    if (type == typeof(DateTime?))
                    {
                        il.Emit(OpCodes.Call, type.GetTypeInfo().GetMethod("get_Value", new Type[] { }));
                        var realLocal = GetRealLocal(il, type, valueDict);
                        il.Emit(OpCodes.Stloc_S, realLocal);
                        il.Emit(OpCodes.Ldloca_S, realLocal);
                    }
                    il.Emit(OpCodes.Call, CultureInfo);
                    il.Emit(OpCodes.Call, DatetimeToString);
                }
                else
                {
                    if (EmitUtil.IsNullable(type))
                    {
                        il.Emit(OpCodes.Call, type.GetTypeInfo().GetMethod("get_Value", new Type[] { }));
                        var realLocal = GetRealLocal(il, type, valueDict);
                        il.Emit(OpCodes.Stloc_S, realLocal);
                        il.Emit(OpCodes.Ldloca_S, realLocal);
                    }

                    il.Emit(OpCodes.Call, EmitUtil.GetNullableArg0(type).GetTypeInfo().GetMethod("ToString", new Type[] { }));
                }
            }
        }
Exemplo n.º 4
0
        /// <summary>获取将对象转换成字典类型的委托
        /// </summary>
        public static Func <T, Dictionary <string, string> > GetDictionaryFunc <T>()
        {
            if (typeof(ICollection).GetTypeInfo().IsAssignableFrom(typeof(T)))
            {
                throw new NotSupportedException("Not support type: ICollection");
            }
            var           type          = typeof(Dictionary <string, string>);
            var           properties    = PropertyInfoUtil.GetProperties(typeof(T));
            DynamicMethod dynamicMethod = new DynamicMethod("ObjectToDictionary", type,
                                                            new Type[] { typeof(T) }, typeof(object), true)
            {
                InitLocals = true
            };
            ILGenerator il = dynamicMethod.GetILGenerator();
            //结束标签
            Label endLabel = il.DefineLabel();
            //定义变量 var user=new User();他为第0个变量
            LocalBuilder obj = il.DeclareLocal(type);
            //定义了可空类型的变量集合
            Dictionary <Type, LocalBuilder> valueDict = new Dictionary <Type, LocalBuilder>();

            // ReSharper disable once AssignNullToNotNullAttribute
            il.Emit(OpCodes.Newobj, type.GetTypeInfo().GetConstructor(Type.EmptyTypes));
            il.Emit(OpCodes.Stloc, obj);
            int index = 0;

            foreach (var property in properties)
            {
                Label endIfLabel = il.DefineLabel();

                //string,可空类型需要null判断
                if (property.PropertyType == typeof(string))
                {
                    il.Emit(OpCodes.Ldarg_0);
                    il.Emit(OpCodes.Callvirt, property.GetGetMethod());
                    il.Emit(OpCodes.Ldnull);
                    il.Emit(OpCodes.Cgt_Un);
                    var tmp = il.DeclareLocal(typeof(bool));
                    il.Emit(OpCodes.Stloc, tmp);
                    il.Emit(OpCodes.Ldloc, tmp);
                    il.Emit(OpCodes.Brfalse_S, endIfLabel);
                }
                //可空类型
                if (EmitUtil.IsNullable(property.PropertyType))
                {
                    var hasValue = il.DeclareLocal(typeof(bool));
                    il.Emit(OpCodes.Ldarg_0);
                    il.Emit(OpCodes.Callvirt, property.GetGetMethod());
                    var local = GetLocal(il, property.PropertyType, valueDict);
                    il.Emit(OpCodes.Stloc_S, local);
                    il.Emit(OpCodes.Ldloca_S, local);
                    il.Emit(OpCodes.Call, property.PropertyType.GetTypeInfo().GetMethod("get_HasValue", new Type[] { }));
                    if (index == 0)
                    {
                        il.Emit(OpCodes.Stloc, hasValue);
                        il.Emit(OpCodes.Ldloc, hasValue);
                    }
                    else
                    {
                        il.Emit(OpCodes.Stloc_S, hasValue);
                        il.Emit(OpCodes.Ldloc_S, hasValue);
                    }
                    index++;
                    il.Emit(OpCodes.Brfalse_S, endIfLabel);
                }

                il.Emit(OpCodes.Ldloc, obj);
                il.Emit(OpCodes.Ldstr, property.Name);
                il.Emit(OpCodes.Ldarg_0);
                il.Emit(OpCodes.Callvirt, property.GetGetMethod()); //取对象属性值
                PropertyToString(il, property.PropertyType, valueDict);
                il.Emit(OpCodes.Callvirt, DictionaryAddItem);
                il.MarkLabel(endIfLabel);
            }
            var result = il.DeclareLocal(type);

            il.Emit(OpCodes.Ldloc, obj);
            il.Emit(OpCodes.Stloc_S, result);
            il.Emit(OpCodes.Br_S, endLabel);
            il.MarkLabel(endLabel);
            il.Emit(OpCodes.Ldloc_S, result);
            il.Emit(OpCodes.Ret);

            var func =
                dynamicMethod.CreateDelegate(typeof(Func <T, Dictionary <string, string> >)) as Func <T, Dictionary <string, string> >;

            if (func == null)
            {
                throw new VerificationException();
            }
            return(func);
        }