在C＃中的类之间传递10个以上的参数？

Question

I am a new to C#, I need a small help on how can I pass multiple parameters between the classes? Below is a small example but my parameters will more than the 10. Is there another way to this?

public StreamStructure(String name, string id, string classname, int number)
    {
        this.name = name;
        this.id = id;
        this.classname = classname;
        this.number = number;
    }

List ------

List<abc> don = new List<abc>();
            foreach (XmlElement abc_cdb in abc_cdbs)
            {

                abc.Name = abc_cdb.GetAttribute("NAME");
                abc.Id = abc_cdb.GetAttribute("id");
                abc.Clssname = abc_cdb.GetAttribute("classname");
                abc.number = Convert.ToInt32(abc_cdb.GetAttribute("number"));
                don.Add(abc);


               }

I have used as suggested in ans but I am trying to create a list in C# my first record gets replaced with the 2nd one, since the fields in MyDTO are defined as public. Do you have any idea how to fix this?

Answer 1

Sure, use DTO's (data transfer objects). That is, create a class that has all the fields you want to send and use an instance of it as a parameter. Added bonus is that your method signature won't change even if you change your DTO class.

Answer 2

You could pass a domain object that represents the item you are manipulating.

    public class Widget
    {
        public string Name {get;set;}
        public int Id {get;set;}
        public string ClassName {get;set;}
        public int Number {get;set;}
    }

    var myWidget = new Widget();
    myWidget.Name = "Blue Widget";
    //etc

    StreamStructure(myWidget);

Answer 3

You are probably better off using C# Initializers or a Data Transfer Object than a large number of constructor parameters. Or combine the two.

public class MyDTO
{
   String Name { get; set; }
   String Id { get; set; }
   String ClassName { get; set; }
   int Number { get; set; }
}

var MyDTO = new MyDTO() 
{
   Name      = Name,
   Id        = Id,
   ClassName = ClassName,
   Number    = Number
}

var stream = new StreamStructure(MyDTO) 

To create a list of these objects as in your example, create a new DTO within the loop body.

var don = new List<MyDTO>(); 
foreach (XmlElement abc_cdb in abc_cdbs) 
{
    var abc = new MyDTO()
    {
        Name = abc_cdb.GetAttribute("NAME");
        Id = abc_cdb.GetAttribute("id");
        ClassName = abc_cdb.GetAttribute("classname");
        Number = Convert.ToInt32(abc_cdb.GetAttribute("number"));
    };

    don.Add( abc );
}

Answer 4

You should write a new class that contains the properties you want to pass to the method, and change your method to include just that new class.

For your example, write a new class like this:

public class RequestObject
{
    public string Name { get; set; }
    public string ID { get; set; }
    public string ClassName { get; set; }
    public int Number { get; set; }
}

Then change your method like this:

public StreamStructure(RequestObject requestObject)
{
    //DoStuff
}