How to achieve method overloading in C#?

2 years ago
Ava Mitchell
1 minute

In C#, method overloading can be used to achieve multiple methods under the same method name with different parameter types or argument numbers. The steps to implement method overloading are as follows:

  1. Define multiple methods with the same method name, but with different parameter types or number of parameters.
  2. When calling a method, which overloaded method to call is determined by the type or number of parameters passed.

The following is an example of how to implement method overloading in code.

class OverloadExample
{
    // 重载方法1：接受一个整数参数
    public void MethodOverload(int num)
    {
        Console.WriteLine("整数参数：" + num);
    }

    // 重载方法2：接受一个字符串参数
    public void MethodOverload(string str)
    {
        Console.WriteLine("字符串参数：" + str);
    }

    // 重载方法3：接受一个整数参数和一个字符串参数
    public void MethodOverload(int num, string str)
    {
        Console.WriteLine("整数参数：" + num);
        Console.WriteLine("字符串参数：" + str);
    }
}

class Program
{
    static void Main(string[] args)
    {
        OverloadExample example = new OverloadExample();

        example.MethodOverload(10); // 调用重载方法1
        example.MethodOverload("Hello"); // 调用重载方法2
        example.MethodOverload(20, "World"); // 调用重载方法3

        Console.ReadLine();
    }
}

Output results:

整数参数：10
字符串参数：Hello
整数参数：20
字符串参数：World

By using method overloading, we can call the corresponding method based on different parameter types or quantities, improving the flexibility and readability of the code.

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