泛型类怀疑如何传递对象并获得所需的结果 [英] Generic Class doubt how to pass object and get the desired result

问题描述

我只是想在C＃中探索Generic类。

我试图将一个对象传递给类Test并且我正在分配 _value 客户对象。



如何在下面的write方法中检索客户对象值？

I am just trying to explore Generic class in C#.
I am trying to pass an object to the class Test and I am assigning the _value the customer object.

How to retrieve the customer object value in write method below?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{

    public class Customer
    {

        public int CusomerId { get; set; }
        public string CustomerName { get; set; }
        public int CustomerAge { get; set; }
    }

    public class Test<T>
    {

        T _value;

        public Test(T t)
        {

            _value = t;
        }

//i am trying here to get the customer object from _value which i assigned in _value
//i cant even use foreach in generic class...
        public void write()
        {
       

        }

    }

    class Program
    {
        static void Main(string[] args)
        {
            Customer obj = new Customer();
            obj.CusomerId = 1001;
            obj.CustomerAge = 23;
            obj.CustomerName = "Anurag";

            Test<object> T1 = new Test<object>(obj);
            T1.write();
            Console.ReadLine();
        }
    }
}

请帮助我

推荐答案

试试这个：

Try this:

public class Test<T> where T : Customer

其中T：客户确保您只能使用 Customer 类型或从 Customer 派生的类型。



然后，在 Main 方法中更改此行：

where T : Customer makes sure you can only use the type Customer or types derived from Customer.

Then, change this line in the Main method:

Test<Customer> T1 = new Test<Customer>(obj);

更改对象进入客户，否则会出现编译错误。



现在，你将成为能够从泛型类中的 Customer 类访问属性。

Change object into Customer, otherwise you will get a compiler error.

Now, you will be able to access the properties from the Customer class from your generic class.

在write（）方法中尝试这个。

对象a = _value;

客户c =（客户）a;

Console.WriteLine（c.CustomerId）;

Console.WriteLine（c.CustomerName）;

Console.WriteLine（c.CustomerAge）;

try this in your write() method
object a = _value;
Customer c = (Customer)a;
Console.WriteLine(c.CustomerId);
Console.WriteLine(c.CustomerName);
Console.WriteLine(c.CustomerAge);

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