如何在 C# 中声明和使用接口?
接口定义属性、方法和事件,这些都是接口的成员。接口仅包含成员的声明。定义成员是派生的类的职责。
让我们声明接口 −
public interface ITransactions { // interface members void showTransaction(); double getAmount(); }
以下是一个示例,演示如何在 C# 中声明和使用接口 −
示例
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(); } } }
输出
Transaction: 001 Date: 8/10/2012 Amount: 78900 Transaction: 002 Date: 9/10/2012 Amount: 451900
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