C# - 接口

接口是一种约束形式，其中只包括成员定义，不包含成员实现的内容。

声明接口

接口是使用interface关键字声明的，默认情况下，接口语句是public公共的。

public interface ITransactions {
   //interface members
   void showTransaction();
   double getAmount();
}

下面的示例演示了上述接口的实现

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

namespace InterfaceApplication {
   
   public interface ITransactions {
      //interface members
      void showTransaction();
      double getAmount();
   }
   public class Transaction : ITransactions {
      private string tCode;
      private string date;
      private double amount;
      
      public Transaction() {
         tCode = " ";
         date = " ";
         amount = 0.0;
      }
      public Transaction(string c, string d, double a) {
         tCode = c;
         date = d;
         amount = a;
      }
      public double getAmount() {
         return amount;
      }
      public void showTransaction() {
         Console.WriteLine("Transaction: {0}", tCode);
         Console.WriteLine("Date: {0}", date);
         Console.WriteLine("Amount: {0}", getAmount());
      }
   }
   class Tester {
     
      static void Main(string[] args) {
         Transaction t1 = new Transaction("001", "8/10/2012", 78900.00);
         Transaction t2 = new Transaction("002", "9/10/2012", 451900.00);
         
         t1.showTransaction();
         t2.showTransaction();
         Console.ReadKey();
      }
   }
}

编译并执行上述代码时，将生成以下输出-

无涯教程网

链接：https://www.learnfk.comhttps://www.learnfk.com/csharp/csharp-interfaces.html

来源：LearnFk无涯教程网

Transaction: 001
Date: 8/10/2012
Amount: 78900
Transaction: 002
Date: 9/10/2012
Amount: 451900