Question

I have a ComboBox with 3 hardcoded string values:

A
B
C

If I try to change the currently selected value based on SelectedValue, SelectedItem, or SelectedText, neither of them change the index to the proper item.

Currently I’m doing something like:

switch (str)
{
    case 'A':
        comboBox.SelectedIndex = 0;
        break;
    case 'B':
        comboBox.SelectedIndex = 1;
        break;
    case 'C':
        comboBox.SelectedIndex = 2;
        break;
}

But as you can see it’s a rather weak solution and will break if items are re-ordered, edited, or appended.

Any better ways?

Answer 1

You can do this:

comboBox.SelectedIndex = comboBox.Items.IndexOf("B");

but this also works on my computer:

comboBox.SelectedItem = "B";

There must be a problem with your strings that are hardcoded in the comboBox. Check if there are some unusual characters or white (blank) characters.