c# - Set combobox selected index/item according to a condition

Question

The comboBox9 gets populated with unique values from an Excel Range with the code below.

            comboBox9.Items.Clear();
            HashSet<string> distinct = new HashSet<string>();


            foreach (_Excel.Range cell in range.Cells)
            {
                string value = (cell.Value2).ToString();

                if (distinct.Add(value))
                    comboBox9.Items.Add(value);
            }

What i tried to do unsuccessfully is set the index of the combobox9 with the first item that satisfies the if condition .

            foreach (string item in comboBox9.Items)
            {
                if (278 * Variables.m3h / (Math.Pow(int.parse(item) / 2, 2) * 3.14) > Variables.maxvelocity)
                {
                    comboBox9.SelectedIndex = comboBox9.Items.IndexOf(item);
                }
            }

Any ideas on where i'm going wrong ?

Answer 1

All items match the condition will be selected. Because the selection unique, the last selected item is displayed.

When the first item is selected, you need stop the selection :

foreach (int item in comboBox9.Items)
{
    if (278 * Variables.m3h / (Math.Pow(item / 2, 2) * 3.14) > Variables.maxvelocity)
    {
        comboBox9.SelectedIndex = comboBox9.Items.IndexOf(item);
        break; // a item is selected, then stop the selection
    }
}