How to Disable comboBox if other comboBox is selected (C#)

Question

Is there anyway to disable a combobox if a different combobox has some sort of text or value in it. I have tried a couple things and can\'t seem to get it to work.

B

Answer 1

Something similar to this, only set whatever property you want, or don't clear it, or whatever. (test combos were not data bound)

    public partial class Form1 : Form
{
    bool fireEvents = true;
    public Form1()
    {
        InitializeComponent();
    }

    private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (fireEvents) doCheck(sender, e);
    }

    private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (fireEvents) doCheck(sender, e);
    }

    private void doCheck(object sender, EventArgs e)
    {
        fireEvents = false; // because we don't have a way to cancel event bubbling
        if (sender == comboBox1)
        {
            comboBox2.SelectedIndex = -1;
        }
        else if (sender == comboBox2)
        {
            comboBox1.SelectedIndex = -1;
        }
        fireEvents = true;
    }

}