gistfile1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using MySql.Data.MySqlClient;

namespace Time_Sheet
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            Fillcombo();
        }

        void Fillcombo()
        {
            string constring = "datasource=localhost;port=3306;username=root;password=root";
            string Query = "select * from timesheet.activities  ;";
            MySqlConnection conDataBase = new MySqlConnection(constring);
            MySqlCommand cmdDataBase = new MySqlCommand(Query, conDataBase);
            MySqlDataReader myReader;
            try
            {
                conDataBase.Open();
                myReader = cmdDataBase.ExecuteReader();

                while (myReader.Read())
                {
                    string sActivity = myReader.GetString("activity");
                    activity_box.Items.Add(sActivity);
                }


            }

            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

    }
}