隐式类型转换 C#中判断某类型是否可以进行隐式类型转换

时间:2021-03-18 人气:1

想了解C#中判断某类型是否可以进行隐式类型转换的相关内容吗，在本文为您仔细讲解隐式类型转换的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：隐式,类型,转换，下面大家一起来学习吧。

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;
   }

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