如何在 C# 中声明和使用接口？
接口定义属性、方法和事件，它们是接口的成员。接口只包含成员的声明。定义成员是派生类的责任。
让我们声明接口-
public interface ITransactions {
//接口成员
void showTransaction();
double getAmount();
}以下示例展示了如何在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 {
//接口成员
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();
}
}
}输出结果Transaction: 001 Date: 8/10/2012 Amount: 78900 Transaction: 002 Date: 9/10/2012 Amount: 451900