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📜  C＃2.0 partial-types

📅  最后修改于: 2020-11-01 03:00:52             🧑  作者: Mango

C＃partial-types

C＃提供了一种概念，可以将源代码编写在单独的文件中，然后将其编译为一个单元。此功能称为部分类型，并包含在C＃2.0中。局部关键字用于创建局部类型。

它允许我们在两个或更多单独的源文件中编写部分类，接口，结构和方法。编译应用程序时，将所有部分组合在一起。

让我们来看一个例子。在这里，我们正在创建一个部分类，该类包括在Customer.cs文件中的depositeAmount()函数和在Customer2.cs文件中的withdraw()函数。这两个函数都存储在单独的文件中，并在编译时合并。

C＃partial-types示例

// Customer.cs

using System;
namespace CSharpFeatures
{
   partial class Customer
    {
        // Deposit function
        public void depositAmount(int d_amount)
        {
            amount += d_amount;
            Console.WriteLine(d_amount+" amount is deposited");
            Console.WriteLine("Available balance is: "+amount);
        }
    }
}

// Customer2.cs

using System;
namespace CSharpFeatures
{
    partial class Customer
    {
        private int amount;
        public int Amount { get => amount; set => amount = value; }
        // Withdraw function
        public void withdraw(int w_amount)
        {
            amount -= w_amount;
            Console.WriteLine(w_amount+" is withdrawn");
            Console.WriteLine("Available balance is: "+amount);
        }
    }
}

using System;
namespace CSharpFeatures
{
    class Program
    {
        static void Main(string[] args)
        {
            Customer customer = new Customer();
            customer.Amount = 2000;
            Console.WriteLine("Current balance is: "+ customer.Amount);
            customer.depositAmount(1000);
            // Accessing seperate file function
            customer.withdraw(500);
        }
    }
}

输出：

Current balance is: 2000
amount is deposited
Available balance is: 3000
500 is withdrawn
Available balance is: 2500