Help, how do i return a list of a class from a method.

dobby

hi, im fairly new to c# and havent grasped al the concepts just yet:
i got stuck while making a method, which i want to return List which is declares inside the method, i just cant get it to work;

heres what im currently doing:

    class T{public String s; public int i;}
    class Main
    {
        public List makeList()
        {
            List temp = new List();
            temp.AddRange(new T());
            temp[0].s = "hello";
            temp[0].i = 1234;
            return temp;
        }
    }

Error    1    The best overloaded method match for 'System.Collections.Generic.List.AddRange(System.Collections.Generic.IEnumerable)'
Error    2    Argument '1': cannot convert from 'WindowsFormsApplication1.T' to 'System.Collections.Generic.IEnumerable'

obviously i dont need to use list in this example, however i have a project which does i just want to know how to make the method work

many thanks

3 Replies

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dobby18y ago
thanks for your help, much appriechated, unforchantly it spawned anohter porblem, (see new thread).

the issues was that the method was unable to access the struct class as it defaults to private. once i change both the main class and the struct to public all was well.
Sri18y ago

public List<T> makeList()

{

List<T> temp = new List<T>();

temp.Add(new T());

temp[0].s = "hello";

temp[0].i = 1234;

return temp;

}

Try this instead. I have used AddRange instead off Add since you are only adding one object and the return does not have to specify anything about the class. The variable declaration automatically lets the compiler know the signature of the returning variable and errors if the variable returning is something other than the one expected in the method declaration.
Alan18y ago
This should work:

        public List makeList()
        {
            List temp = new List();
            temp.Add(new T());
            temp[0].s = "hello";
            temp[0].i = 1234;
            return temp;
        }