Program crashed when i search using combobox autocomplete

Question

I'm trying to search in array variable have big data using combobox autocomplete.

And this is my work:

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

    Thread thread1;

    long test1 = 0;
    string randName;
    String[] ComboboxValue = new String[20001];

    private void button1_Click(object sender, EventArgs e)
    {
        thread1 = new Thread(add_combo_1);
        thread1.Start();
    }

    private static Random random = new Random();
    public static string RandomString(int length)
    {
        const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        return new string(Enumerable.Repeat(chars, length)
          .Select(s => s[random.Next(s.Length)]).ToArray());
    }

    private void add_combo_1()
    {
        while (test1++ < 20000)
        {
            randName = RandomString(1000);
            this.Invoke((MethodInvoker)delegate () {
               //comboBox1.Items.Add(randName.ToString());
               ComboboxValue[test1] = randName.ToString();
                comboBox1.AutoCompleteCustomSource.Add(ComboboxValue[test1]);
            });
        }
    }
}

This what i use setting of combobox:

I think crash happened when i searching and the program still loading data to array.

So any one have a solution?

Answer 1

you have to let the program finish going through the while loop that you set unless you insert a break; inside with or without a IF statement inside the loop