判断C#中可以进行隐式类型转换的类型

来源：互联网发布：windows系统即将过期编辑：程序博客网时间：2024/05/22 05:18
在我们采用反射动态调用一些方法时，常常涉及到类型的转换，直接判断类型是否相符有时不能判断调用方法是否合适
C#中，有些类型是可以隐式转换的，我整理了这些可以隐式转换的类型，供大家参考
        static private bool CanConvert(Type from, Type to)        {            if (from.IsPrimitive && to.IsPrimitive)            {                TypeCode typeCodeFrom = Type.GetTypeCode(from);                TypeCode typeCodeTo = Type.GetTypeCode(to);                if (typeCodeFrom == typeCodeTo)                    return true;                if (typeCodeFrom == TypeCode.Char)                    switch (typeCodeTo)                    {                        case TypeCode.UInt16: return true;                        case TypeCode.UInt32: return true;                        case TypeCode.Int32: return true;                        case TypeCode.UInt64: return true;                        case TypeCode.Int64: return true;                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from Byte follow.                if (typeCodeFrom == TypeCode.Byte)                    switch (typeCodeTo)                    {                        case TypeCode.Char: return true;                        case TypeCode.UInt16: return true;                        case TypeCode.Int16: return true;                        case TypeCode.UInt32: return true;                        case TypeCode.Int32: return true;                        case TypeCode.UInt64: return true;                        case TypeCode.Int64: return true;                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from SByte follow.                if (typeCodeFrom == TypeCode.SByte)                    switch (typeCodeTo)                    {                        case TypeCode.Int16: return true;                        case TypeCode.Int32: return true;                        case TypeCode.Int64: return true;                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from UInt16 follow.                if (typeCodeFrom == TypeCode.UInt16)                    switch (typeCodeTo)                    {                        case TypeCode.UInt32: return true;                        case TypeCode.Int32: return true;                        case TypeCode.UInt64: return true;                        case TypeCode.Int64: return true;                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from Int16 follow.                if (typeCodeFrom == TypeCode.Int16)                    switch (typeCodeTo)                    {                        case TypeCode.Int32: return true;                        case TypeCode.Int64: return true;                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from UInt32 follow.                if (typeCodeFrom == TypeCode.UInt32)                    switch (typeCodeTo)                    {                        case TypeCode.UInt64: return true;                        case TypeCode.Int64: return true;                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from Int32 follow.                if (typeCodeFrom == TypeCode.Int32)                    switch (typeCodeTo)                    {                        case TypeCode.Int64: return true;                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from UInt64 follow.                if (typeCodeFrom == TypeCode.UInt64)                    switch (typeCodeTo)                    {                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from Int64 follow.                if (typeCodeFrom == TypeCode.Int64)                    switch (typeCodeTo)                    {                        case TypeCode.Single: return true;                        case TypeCode.Double: return true;                        default: return false;                    }                // Possible conversions from Single follow.                if (typeCodeFrom == TypeCode.Single)                    switch (typeCodeTo)                    {                        case TypeCode.Double: return true;                        default: return false;                    }            }            return false;        }