C＃实例化一个将ListArray保存到方法中的Class

Question

I am trying to instantiate an instance of the ListEx class in my StoreNames() method in order to get a list of names and store it in the class ListEx so other methods can access them. I recieve an error that I cannot convert a void to an int. Can someone shed a little light on this?

public class ListEx
{
    List<string> name = new List<string>();
}

string StoreNames()
{
   ListEx nm = new ListEx();
   List<string> tmpName = new List<string>();

   nm.name.add = tmpName.Add(Console.ReadLine());
}

////////////////new Code//////////////////////

class Program
{
    public static List<string> localList = new List<string>();
    static void Main(string[] args)
    {
        List<string> a = new List<string>();
        SortName(a);
        Console.Read();
    }
    public static List<string> StoreName(List<string> aString)
    {
        aString = new List<string>();
        localList.Add("c");
        localList.Add("a");
        localList.Add("b");
        localList.Add("d");

        foreach (string s in localList)
        {
            Console.WriteLine(s);
        }
        Console.Read();
        return aString;
    }
    public static List<string> SortName(List<string> aString)
    {
        StoreName(aString);
        localList.Sort();
        foreach (string s in localList)
        {
            Console.WriteLine(s);
        }
        return localList;
    }
}

Answer 1

Well, in this line:

nm.name.add = huh.Add(Console.ReadLine());

• ... you're trying to use a private field, which won't work unless StoreNames is within ListEx.

• You're then trying to assign to a subfield/property of ListEx ... what are you expecting add to refer to?

• You're trying to use huh.Add when you haven't shown what huh is

• You're trying to assign the value returned by huh.Add to nm.name.add , and I suspect that Add has a void return type.

In other words, it's pretty broken. It's not really clear what you're trying to do here, why you need ListEx , where StoreNames is, or why you're trying to assign the return value of the Add method to a field/property. Does ListEx really just consist of a private field? It's not going to be much use if so.

Answer 2

nm.name.Add( Console.ReadLine()); ?

Answer 3

Or (after reading your post again:)

public class ListEx
{
   public List<string> name = new List<string>();
}

void StoreName()
{
  ListEx nm = new ListEx();
  List<string> localList = new List<string>();

  localList.Add ( "whatever" );

  nm.name = localList;
}

void StoreNameShort()
{
  ListEx nm = new ListEx();

  nm.name.Add( "whatever" );
}

hth

Mario