UsingComboBox_Control

April 14, 2014_Monday

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

        private void Form1_Load(object sender, EventArgs e)
        {
            //The main property of ComboBox is: Items.
            //It is an array (or collection) that holds
            //a list of items to be displayed in the ComboBox
            //To display an item in the ComboBox, you should
            // add it to the ComboBox Items property
            cboCities.Items.Add("Seattle");
            cboCities.Items.Add("Portland");
            //you can use the Add method to add one item at a time.

            //If you define a string array
            //you can add the entire array in a single statement
            string[] cities = { "New York", "Vancouver", "Houston", "Dallas", "Miami", "Los Angeles", "San Fransisco", "San Diego" };
         
            //add the entire array to the ComboBox Items
            cboCities.Items.AddRange(cities);

            //Pre-select a city (default city)
           // cboCities.SelectedIndex = 0;
            //or
            cboCities.Text = "Seattle";

            //==================================================================
            string[] countries = { "USA", "Canada", "Mexico", "Brazil", "Argentina", "Peru", "UK", "Germany", "Spain", "China", "India", "Pakistan", "Russia", "Poland", "Egypt", "Syria" };
            cboCountries.Items.AddRange(countries);
            cboCountries.SelectedIndex = 0;
        }

        private void btnGetCity_Click(object sender, EventArgs e)
        {
            //get the selected city from the ComboBox
            //cboCities
            //option 1: using the Text property
            string selectedCity = cboCities.Text;

            //option 2: using the SelectedItem property
            //string selectedCity = cboCities.SelectedItem.ToString();
            //display it
            txtSelectedItem.Text = selectedCity;
        }

        private void cboCountries_SelectedIndexChanged(object sender, EventArgs e)
        {
            //code here runs every time a new selection is made
            //get selected country
            string selectedCountry = cboCountries.Text;
            //display it to the textbox.
            txtSelectedCountry.Text = selectedCountry;
        }
    }
}