Question

C#引用方法出现非静态的字段方法或属性要求对象引用错误

在Program中调用CanDo的时候出现错误：非静态的字段方法或属性要求对象引用
class Program
{
static void Main(string[] args)
{
Person youHongHui = new Person();
youHongHui._age = 15;
youHongHui._name = "张三";
youHongHui._gender = '男';
Person.CanDo();
}
}

class Person
{
public string _name;
public char _gender;
public int _age;

public void CanDo()
{
Console.WriteLine("我是{0}，我是{1}生，我今年{2}岁了", this. _name,this. _gender,this. _age);
}
}
如果Cando加上static，后面的占位符又报错

Answer 1

你要改成下面这样：

 class Program
    {
        static void Main(string[] args)
        {
            Person youHongHui = new Person();
            youHongHui._age = 15;
            youHongHui._name = "张三";
            youHongHui._gender = '男';
            youHongHui.CanDo();//Person.CanDo(); 要使用对象youHongHui的CanDo方法。
        }
    }

    class Person
    {
        public string _name;
        public char _gender;
        public int _age;

        public void CanDo()
        {
            Console.WriteLine("我是{0}，我是{1}生，我今年{2}岁了", this. _name,this. _gender,this. _age);
        }
    }