Thanks Luc for the useful info. I'm going to look into your suggestion about the IEnumerator. Such a steep learning curve only being new to c#:).

Haz

I have a car class with various fields some of which are colour, make, mileage. I then have a car collection which contains multiple car objects. public List<Car> CarCollection = new List<Car>(); What I want to do is pass the entire colour field array from the collection to a method CarData. (The method will be used to perform analysis on whatever array is passed in). CarData(CarCollection[].Colour); I can't get it to work. Is this possible (I guessing not)? Do I need to create a copy somehow? Please suggest an efficient solution to my problem. Thanks in advance for any help.

Haz

Sorry Greeeg I don't understand how that would help what I'm doing (please explain more - maybe I haven't explined it very well)? Basically I need to itterate through all the collection object fields in turn. I have a method that does it for one of the fields, but instead of copying it 100 times and slightly changing the field refernces I was trying to create a method that was more generic (this is the bit I can't get my head around). CardDataCollection[0].Card1 CardDataCollection[1].Card1 CardDataCollection[2].Card1 CardDataCollection[3].Card1 CardDataCollection[4].Card1 CardDataCollection[5].Card1 to end of collection Then I need to do the same for the Card2 field And so on for each of the remaining Card fields upto 100 CardDataCollection[0].Card100 CardDataCollection[1].Card100 CardDataCollection[2].Card100 CardDataCollection[3].Card100 CardDataCollection[4].Card100 CardDataCollection[5].Card100 to end of collection Put another way I need one method to prevent me creating 100 very similar methods as described below.

    public static void CalcDataCard1()
    {

        int i;

        for (i = 0; i < CardDataCollection.Count; i++)
        { 
            if (CardDataCollection\[i\].Card1 == 1)
            {
                //do data processing here
            }
        }
    }

    public static void CalcDataCard2()
    {

        int i;

        for (i = 0; i < CardDataCollection.Count; i++)
        { 
            if (CardDataCollection\[i\].Card2 == 1)
            {
                //do data processing here
            }
        }
    }

    public static void CalcDataCard3()
    {

        int i;

        for (i = 0; i < CardDataCollection.Count; i++)
        { 
            if (CardDataCollection\[i\].Card3 == 1)
            {
                //do data processing here
            }
        }
    }

Thanks again for any help.

Haz

I am really stuck trying work out and understand how to achieve the following. I have a collection of objects and want to peform some data analysis on each of the fields in turn using a method. The collection List<CardData> CardDataCollection = new List<CardData>(); CardData class contains fields called Card1,Card2,Card3 etc The code below has been simplified to show what I'm currently doing for one of the collection object fields (CardDataCollection[i].Card1).

    public static void CalcData()
    {

        int i;

        for (i = 0; i < CardDataCollection.Count; i++)
        { 
            if (CardDataCollection\[i\].Card1 == 1)
            {
                //do data processing here
            }
        }
    }

I need to perform the same exercise on each of the Card fields (for Card1 upto Card100) in the collection so I want to create a method that will allow me pass in some kind of reference to the collection object field (CardX). Note: I need access using the [i] as the data processing requires me to use for example [i-5] (i.e can't use foreach loops) I know what I want it do but just can quite get my head around how to do it. I'll try to explian below how I would change the code.

    public static void CalcData(reference to relevant card number field eg Card50)
    {

        int i;

        for (i = 0; i < CardDataCollection.Count; i++)
        { 
            if (Card50\[i\] == 1) //I know this can't be done
            {
                //do data processing here
            }
        }
    }

Please excuse any incorrect technical description as I'm only new to this C#. Thanks in advance for any help you can give me.

Haz

Thanks for that info guys, I'll go away and have a read up on it :)

Haz

Sorry Paul what do you mean by regular expressions? I'm only fairly new to this c#

Haz

I have a text file of the following format "apple","orange","pear" etc I have tried both char and string seperators but can't think of a way grab the data cleanly without including a " or , . I either end up with "apple" "orange" "pear" or "apple orange pear" The code I have been using. private static char[] charSeperator = new char[] { ',' }; private static string[] strSeperator = new string[] {"\",\""}; strArray = strLine.Split(charSeperator); strArray = strLine.Split(strSeperator,StringSplitOptions.None); Is there a simple way of grabing apple orange and pear from the text file, without having to do further data cleaning? Thanks in advance for any help you can offer

Haz

I can't seem to get my head around the following. My Frequency class has two fields Data1 and Data2. public static List ColourFreqCollection = new List(); ColourFreqCollection.Add(new Frequency(1,2)); ColourFreqCollection.Add(new Frequency(3,2));etc Is it possible to now use the IndexOf method to look in the Frequency objects Data1 field and return the index if a particular number exists? ColourFreqCollection.IndexOf(don't know what to put here! -look in object data1 field and return index if true); Else what would be the best thing to do? Thanks in advance for your help.

Haz

The default close/exit button on my form instantly closes the form when clicked. However I would like the form to ask if I would like to save changes before closing when clicking this button. I can't work out how to get access to the relevant function - assuming that is what i need to do. How should I go about solving this problem? Thanks

Haz

Thank you all :)

Haz

The pointy brackets containing the bits have been removed from the code by the editor in my previous reply, not sure how to override that when posting here.

Haz

Sorry, it is a generic collection. public static List SpinDataCollection = new List();

Haz

I am using collections for the first time and can't seem to figure out how to obtain the index of the last entry in the collection. I am guessing that I could use IndexOf() or LastIndexOf() methods, but not sure what to pass into the method. Here is the code public static class NumberProcessing { public static void UpdateSpinDataCollection() { SpinDataCollection.Add(new SpinData SpinNumber, CurrentNumber, Colour OddorEven); //Trying here to get index of last entry in collection SDCPointer = (short)SpinDataCollection.LastIndexOf(); //Test MessageBox.Show("SDCPointer:\t" + SDCPointer.ToString()); } }

Haz

Thanks for your speedy response. Your solution works really well in my program. :)

Haz

I have an array full of values of type short?[] and want to display them in a MultiLine Textbox which requires values of type string[]. I can not figure out how to convert between the two value types. Here is my code that I thought would work but I get error - "can not convert type short?[] to string[] " NumArray = new short?[37]; public void SetFormData() { textbox1.Lines = new string[37] ; textbox1.Lines = (string[])NumArray; }

Haz

Forget that I had missed off the static keyword for a method in one of the static classes. Only just realised that all static classes should have static members. Thanks again for your help :)

Haz

Thanks a lot for that, you were exactly right! I have slightly altered my code to cut down on the form reference passing. However when I try compling it it throws up an error - Compiler Error CS0120 - Error Message "An object reference is required for the nonstatic field, method, or property 'member' " and refers to line NumberProcessing.UpdateNumArray(this); I am guessing there is a problem with the "this" value? Any suggestions what is wrong??? Code is below. namespace RouletteV1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void btn1_Click(object sender, EventArgs e) { NumberAttributes.Load(1); NumberProcessing.UpdateNumArray(this); } public void SetFormData() { tboxNumArray.Text = "Hello"; } public class NumberProcessing { public void UpdateNumArray(Form1 form) { form.SetFormData(); } } } Thanks in advance for your help :)

Haz

Forget my last question. It has just clicked!!! Everything makes sense now :) Thanks

Haz

Thanks for that, everything has just clicked!!!! I understand where I was going wrong!! Fundamentals of oop :)

Haz

Can anyone else help me with this?

Haz