Question

So i have this class

namespace WindowsFormsApplication2
{ 
    public class Records
    {
        public string name, surname;

        public int num;
    }
}

And i want to create an array of this class, tried everything and it still doesn’t work, i started to think it is a bug, i am using Visual Studio 2012, here is my code.Any help would be appreciated.

(there is a datagrid of records on a form, which i’m reading from a textbox, informations are seperated with tab character)

namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        Records[] userRecs = new Records[20];

        public int count = 0;


        private void Form1_Load(object sender, EventArgs e)
        {
            getText();
        }

        public void getText() 
        {
            FileStream fs = new FileStream("D:\\filestr.txt",FileMode.Open);

            StreamReader sr = new StreamReader(fs);

            for (string readed = sr.ReadLine(); readed != null; readed = sr.ReadLine())
            {
                string[] tempStr = readed.Split('\t');

                userRecs[count].num = Convert.ToInt32(tempStr[0]);

                userRecs[count].name = tempStr[1];

                userRecs[count].surname = tempStr[2];

                count++;
            }

            for (int i = 0; i < count; i++)
            {
                dataGridView1.Rows.Add(userRecs[count].num, userRecs[count].name, userRecs[count].surname);
            }

            sr.Close();
            fs.Close();
        }
    }
}

Answer 1

This allocates memory for the array, but does not create Record instances:

Records[] userRecs = new Records[20];

Now when you’re iterating through your file lines, you need to instantiate your class:

userRecs[count] = new Records();
userRecs[count].num = ...
...