C# - Struggling yet again

toastyman · 6 Jul 2006 at 21:05

Hey to all.

Just getting back into learning C#, and i've hit this problem.
What it currently does it bring up a message box showing the following:

i is currently 0
i is currently 0
i is currently 0
i is currently 0
i is currently 1
i is currently 1
i is currently 1
i is currently 1
i is currently 2
i is currently 2
i is currently 2
i is currently 2
i is currently 3
i is currently 3
i is currently 3
i is currently 3
i is currently 4
i is currently 4
i is currently 4
i is currently 4

Then it says this:

IndexOutOfRangeException was unhandled

and points to this line:

Code:

userdetails[i] = reader.Value;

I thought this was quite odd, as I set this:

Code:

userdetails = new string[4];

Even though the array is starting at 0, so I would have thought the max value was 3 :confused:

Anyway, here is the code if anyone has the time to help with this one.

Code:

        public messenger()
        {
            InitializeComponent();
            String URLString = "http://www.routehiker.org.uk/api/help/userdetails.php";
            XmlTextReader reader = new XmlTextReader(URLString);
            string [] userdetails;
            userdetails = new string[4];
            int i = 0;
            while (reader.Read())
            {
                switch (reader.NodeType)
                {
                    case XmlNodeType.Text:
                        userdetails[i] = reader.Value;
                        i++;                        
                    break;
                }
                MessageBox.Show("i is currently " + i);
            }
            Form Other = new responses();
            Other.ShowDialog();
        }

Regards,

Rich

toastyman · 6 Jul 2006 at 21:45

Hmm... whats its doing now is its getting to 4, then going back to 0 and starting again. Its like its recalling itself :confused:

toastyman · 6 Jul 2006 at 21:49

Code:

public messenger()
        {
            InitializeComponent();
            String URLString = "http://www.routehiker.org.uk/api/help/userdetails.php";
            XmlTextReader reader = new XmlTextReader(URLString);
            string [] userdetails;
            userdetails = new string[4];
            int i = 0;
            while ((reader.Read() && i < 4))
            {
                switch (reader.NodeType)
                {
                    case XmlNodeType.Text:
                        userdetails[i] = reader.Value;
                        i++;                        
                    break;
                }
            }
        }

It's just stuck in a loop till I force the application to close! It's looping something but it doesn't make sense.

toastyman · 6 Jul 2006 at 21:53

Yes its still doing the iterations of each integer in groups of 4. I think what i'll do is research different methods of parsing XML and start again. This method seems a bit unefficient.

toastyman · 6 Jul 2006 at 22:19

I had never heard of it, but after reading through info on Wikipedia , it looks ideal. Thanks!

toastyman · 9 Jul 2006 at 22:02

Its ok I rebuilt the solution and it now works fine.

What I would really appreciate is if someone could add me on msn - richwillars @ hotm... .com and help me to finish this project. I reckon it would be half an hour's work at max, and I usually learn better by example of others.

If someone could add me on msn, i'd supply the project files and explain any details which are needed.

A summary of what needs doing:

Storing user details
Program should run in the background
Passing variables between forms
Activating some code when a socket being called upon by another computer

And thats it

Anyone willing to help?

Regards,
Rich