Question

I am trying to generate a random fruit and display it on GUI in a label. I am using this code to do it.

 partial class Form1 : Form
 {
    int MagicNumber = 0;
    List<string> NameList = new List<string>();
    Random r = new Random();

    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        NameList.Add("Apples");
        NameList.Add("Pears");
        NameList.Add("Oranges");
        NameList.Add("Bananas");
        NameList.Add("Kiwi");

        for (int i = 0; i < 8; i++)
        {
            Thread t = new Thread(new ThreadStart(Display));
            t.Start();

            label1.Text = NameList[MagicNumber];
            Thread.Sleep(1000);
        }
   }

    private void Display()
    {
        MagicNumber = r.Next(5);
    }
}

The problem is the fact that in GUI i see only the last result of fruits choice and not how they are skipped from an iteration to other. I thought that this code will give me the possibility to see how fruits changes until the last was chosen , when i is 8.

Please if you have an idea why this code is not displaying how the fruits are chosen in label give me a hand !

Thanks.

Answer 1

Just call Application.DoEvents(); after assigning text to label – that will refresh UI.

BTW I don’t understand why you are using threads to generate random numbers