动态类型转化

最近在做项目的时候，因为懒得一个一个字段地赋值，使用了反射动态为属性赋值，但是碰到类型转换时错误，

public static object TypeRransition(Type t, object value)
        {
            object result = null;
            switch (t.Name)
            {
                case "String":
                    result = Convert.ToString(value);
                    break;
                case "Int32":
                    result = Convert.ToInt32(value);
                    break;
                case "DateTime":
                    result = Convert.ToDateTime(value);
                    break;
                case "Double":
                    result = Convert.ToDouble(value);
                    break;
                case "Decimal":
                    result = Convert.ToDecimal(value);
                    break;
                case "Byte":
                    result = Convert.ToByte(value);
                    break;
                case "Boolean":
                    result = Convert.ToBoolean(value);
                    break;
                case "Guid":
                    result = new Guid();
                    break;
            }
            return result;
        }


后来发现代码还可以精简

public static object TypeRransition(Type type, object value)
        {
            object obj = null;
            if (!Convert.IsDBNull(value))
            {
                if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
                {
                    Type t = type.GetGenericArguments()[0];
                    string a = t.Name;
                    obj = TypeRransition(t, value);
                }
                else
                {
                    obj = Convert.ChangeType(value, type);
                }
            }
            return obj;
        }