我试图通过在数据库中查阅记录(意图将查询数据库,并将标本的回归值定在数据库中),或者通过指明“手头”的数值,来建立能够自信的等级,而不需要数据库电话。

我先看一对夫妇的教科书,以发现这一功能的“最佳实践”,令人痛心的是,我早上来。

我撰写了两部 sample样本,反映了我认为是两种最可能的解决办法,但我并没有提出最妥善执行的想法?

样本1使用大多数书本告诉我的是“首选”方式,但与这些要求一并介绍的大多数例子实际上不符合我的情况。 我在此担心,流动不能像第2号申请那样读。

using System;

namespace TestApp
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var one = new OverloadedClassTester();
            var two = new OverloadedClassTester(42);
            var three = new OverloadedClassTester(69, "Mike", 24);

            Console.WriteLine("{0}{1}{2}", one, two, three);

            Console.ReadKey();
        }        
    }

    public class OverloadedClassTester
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public int age { get; set; }

        public OverloadedClassTester() : this(0) { }

        public OverloadedClassTester (int _ID) : this (_ID, "", 0)
        {
            this.age = 14;  // Pretend that this was sourced from a database
            this.Name = "Steve"; // Pretend that this was sourced from a database
        }

        public OverloadedClassTester(int _ID, string _Name, int _age)
        {
            this.ID = _ID;
            this.Name = _Name;
            this.age = _age;
        }

        public override string ToString()
        {
            return String.Format("ID: {0}
Name: {1}
Age: {2}

", this.ID, this.Name, this.age);
        }
    }
}

这份Sample(App #2)“耳朵”更容易读懂,因为我认为更容易看到行动的流动。 然而,从所节省的特性来看,这似乎有效率。 而且,在完全初步确定之前,使用某种物体的方法,也无危险吗?

using System;

namespace TestApp
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var one = new OverloadedClassTester();
            var two = new OverloadedClassTester(42);
            var three = new OverloadedClassTester(69, "Mike", 24);

            Console.WriteLine("{0}{1}{2}", one, two, three);

            Console.ReadKey();
        }        
    }

    public class OverloadedClassTester
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public int age { get; set; }

        public OverloadedClassTester()
        {
            initialise(0, "", 21); // use defaults.
        }

        public OverloadedClassTester (int _ID)
        {
            var age = 14;  // Pretend that this was sourced from a database (from _ID)
            var Name = "Steve"; // Pretend that this was sourced from a database (from _ID)

            initialise(_ID, Name, age);
        }

        public OverloadedClassTester(int _ID, string _Name, int _age)
        {
            initialise(_ID, _Name, _age);
        }

        public void initialise(int _ID, string _Name, int _age)
        {
            this.ID = _ID;
            this.Name = _Name;
            this.age = _age;
        }

        public override string ToString()
        {
            return String.Format("ID: {0}
Name: {1}
Age: {2}

", this.ID, this.Name, this.age);
        }
    }
}

解决这一问题的“正确”方式是什么?

感谢