C#通用类型转换 Convert.ChangeType 转自网络

static public object ChangeType(object value, Type type)

        {

            if (value == null && type.IsGenericType) return Activator.CreateInstance(type);

            if (value == null) return null;

            if (type == value.GetType()) return value;

            if (type.IsEnum)

            {

                if (value is string)

                    return Enum.Parse(type, value as string);

                else

                    return Enum.ToObject(type, value);

            }

            if (!type.IsInterface && type.IsGenericType)

            {

                Type innerType = type.GetGenericArguments()[0];

                object innerValue = ChangeType(value, innerType);

                return Activator.CreateInstance(type, new object[] { innerValue });

            }

            if (value is string && type == typeof(Guid)) return new Guid(value as string);

            if (value is string && type == typeof(Version)) return new Version(value as string);

            if (!(value is IConvertible)) return value;

            return Convert.ChangeType(value, type);

        }