Populating a Combobox based on another combobox value

[eihabisaac]

Hi everyone

I'm using VS2005 C# with MySQL to do a windows application

i'm also using Devart for MySQL

i was able to populate a combobox from the database

but i really want to populate the other combobox based on the first combo value

like the picture

such as Ajax

can anybody help me

[eihabisaac]

hi all

23 View for now and nobody knew how to do that
i did and im not gonna tell you how ,, just kidding i will post it later

[tlhintoq]

I see this come up a LOT. I'm very surprised that when you do a search on Google or through Bytes that you don't find a dozen questions just like it over the last few weeks or months. Just because the answer is a couple months old doesn't make it any less valid.

Just react to the "SelectedIndexChanged" event of the first combo box. If the selected index is -1, then no item is selected. zero or greater is the index of the Items array. One way to handle it could be to create a Switch...Case construct.

        private void cbFirstComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (((ComboBox)sender).SelectedItem as string)
            {
                case "United States":
                    cbSecondComboBox.SelectedIndex = 1;
                    break;
                case "Russia":
                    cbSecondComboBox.SelectedIndex = 2;
                    break;
            }