ArrayLists + Inner Structs

This is a discussion on ArrayLists + Inner Structs within the C# Programming forums, part of the General Programming Boards category; I've created an ArrayList of structs of structs. What's the best way to access the inner structs ? an Enumerator ...

  1. #1
    Something Clever ginoitalo's Avatar
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    ArrayLists + Inner Structs

    I've created an ArrayList of structs of structs.

    What's the best way to access the inner structs ?
    an Enumerator is iterating through the ArrayList,
    and you can access current.

    I'm guessing you need get/set functions
    (accessors i think) for both structs to do this ?

    The Idea in C++ :
    Code:
    iter_x->struct1_NAME->part_x = "I want to Change this container"

  2. #2
    the hat of redundancy hat nvoigt's Avatar
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    I have not used structs widely in my programs, because they are value types and copy their data each time they are given to a function, but with a class with inner classes, you could make each inner class a property of the outer class with set/get accessors. Maybe only get accessors if you don't need writing access.

    PHP Code:
    using System;
    using System.Collections

    namespace 
    ConsoleApplication1
    {
        public class 
    B
        
    {
            private 
    string m_Name;
        
            public 
    Bstring aName )
            {
                
    m_Name aName;
            }

            public 
    string Name
            
    {
                
    get { return m_Name; }
                
    set m_Name value; }
            }
        }

        public class 
    A
        
    {
            private 
    B m_InnerClass;
            
            public 
    Astring BName )
            {
                
    m_InnerClass = new BBName );
            }

            public 
    B InnerClass
            
    {
                
    get { return m_InnerClass; }
                
    set m_InnerClass value; }
            }
        }

        class 
    Class1
        
    {
            [
    STAThread]
            static 
    void Main(string[] args)
            {
                
    ArrayList list = new ArrayList();

                for( 
    int i 10 i++ )
                {
                    
    // Add a new Instance of class A to the ArrayList
                    
    list.Add( new A"Class #" i.ToString() ) );
                    
    Console.WriteLine"Class #" i.ToString() + "created." ); 
                }

                
    Console.WriteLine"Elements in list:" ); 

                foreach( 
    A Element in list )
                {
                    
    // this is your C++ line:
                    // Element is the object
                    // .InnerClass calls the property and returns the Innerclass
                    // .Name returns the Name of the InnerClass
                    
    Console.WriteLineElement.InnerClass.Name );
                }

                
    Console.WriteLine"Done now, Garbage collection takes care of the rest" ); 
                
    Console.Read(); 
            }
        }

    hth
    -nv

    She was so Blonde, she spent 20 minutes looking at the orange juice can because it said "Concentrate."

    When in doubt, read the FAQ.
    Then ask a smart question.

  3. #3
    Registered User CompiledMonkey's Avatar
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    I agree with nvoigt. I would use a class instead of structs. Throughout my C# programming (only a few weeks) I haven't seen much use for structs. Classes have been fine for me so far.

  4. #4
    Something Clever ginoitalo's Avatar
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    Isn't there a way to do the same thing but with array indexers

    //The 3rd element in the array list

    list[3].A.B-stuff

    p.s.
    Rough Idea/Guess

  5. #5
    Something Clever ginoitalo's Avatar
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    more basic...

    Having the ability to iterate easily one by one
    and being able to tell if i'm at the first/last rec is necessary.

    is an ArrayList() the best method of storage ?

  6. #6
    the hat of redundancy hat nvoigt's Avatar
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    Hannover, Germany
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    Yes, you can do it with an ArrayIndexer like in plain old C.

    An ArrayList is the best method of storage if you have a number of elements that is growing or shrinking only by manipulating the last element ( i.e. adding at the end, deleting from the end ).
    hth
    -nv

    She was so Blonde, she spent 20 minutes looking at the orange juice can because it said "Concentrate."

    When in doubt, read the FAQ.
    Then ask a smart question.

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