不包含构造函数，需要两个参数？ [英] Does not contain a constructor that takes 2 arguments?

问题描述

我目前在做一些类编码，不知道什么地方出了错与我的项目？

I am currently doing some class coding and wonder what went wrong with my project?

class ContactPerson
{
    string name;
    ContactNo telNo;

    public ContactPerson(string in_Name, ContactNo in_No)
    {
        name = in_Name;
        telNo = new ContactNo();


    }
    public string getName()
    {
        return name;
    }
    public ContactNo getContactInfo()
    {
        return telNo;
    }
    public void setName(string in_Name)
    {
        name = in_Name;
    }
    public void setContactInfo (ContactNo in_No)
    {
        telNo = in_No;
    }
}

}

}

class ContactNo
{
    string contactType;
    string contactNo;

    public void setContactType(string in_Type)
    {
        contactType = in_Type;
    }
    public string getContactType()
    {
        return contactType;
    }
    public void setContactNo(string in_No)
    {
        contactNo = in_No;
    }
    public string getContactNo()
    {
        return contactNo;
    }

}

}

}

class Program
{
    static void Main(string[] args)
    {

        ContactNo telNo;
        telNo =   new ContactNo("Mobile No: ", 95656565);

        ContactPerson myFriend;
        myFriend = new ContactPerson("Fred Smith", telNo);
        string strName;
        strName = myFriend.getName();

        Console.WriteLine(" " + strName);
        ContactNo outContact;
        outContact = myFriend.getContactInfo();
        outContact.getContactType();
        Console.WriteLine(outContact);
        outContact.getContactNo();
        Console.WriteLine(outContact);

        Console.ReadLine();

    }
}

}

}

在程序类
telNo =新ContactNo（手机号码：95656565）;
孤单的错误说法不包含一个构造函数2参数
可我知道为什么吗？

At the program class " telNo = new ContactNo("Mobile No: ", 95656565); " theres error saying Does not contain a constructor that takes 2 arguments may i know why?

推荐答案

这可能是因为你没有包含在这两个参数的构造函数ContactNo类，如错误提示。您可以在类一看，你会发现，没有构造存在。 。你有一个在ContactPerson类，虽然

That would be because you don't have a constructor that contains two arguments in the ContactNo class, as the error suggests. Take a look in the class, and you'll notice that there is no constructor there. You DO have one in the ContactPerson class, though.

这行： telNo =新ContactNo（手机号码：95656565）;
呼吁ContactNo采用两个参数的构造函数：一个字符串，一个int。您没有被设置为当前做一个构造函数，而这也正是你的错误。你可以通过添加

This line: telNo = new ContactNo("Mobile No: ", 95656565); is calling a constructor for ContactNo that takes two arguments: a string, and an int. You don't have a constructor that is set up to do this currently, and that's where your error is. You could create one by adding

public ContactNo(string s, int n){
   //initializations
}

或类似这种事情。或者，如果您使用的是数字的字符串（它看起来像），取代 INTñ与字符串s2 或任何你想调用它。

or something of that nature. Or, if you're using a string for the number (which it looks like), replace int n with string s2 or whatever you wish to call it.

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