/// <summary>
        /// Populate comboBoxModule depending on the selected project
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void comboBoxProject_SelectedIndexChanged(object sender, EventArgs e)
        {
            comboBoxModule.Items.Clear();
            List <Module> modules = new List <Module>();

            if (DbConnector.OpenSQLConnection()) // Open connection to the database
            {
                // Connection opened
                ProjectDataAccess project = new ProjectDataAccess();
                int projectId             = project.FindProjectByProjectName(comboBoxProject.Text);
                ModuleDataAccess module   = new ModuleDataAccess();
                modules = module.FindModuleByProject(Convert.ToInt32(projectId));
            }
            else
            {
                // Connection could not be opened
                MessageBox.Show("Connection to the database could not be established", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

            if (modules != null)
            {
                // Populate comboBoxes with data
                foreach (Module m in modules)
                {
                    comboBoxModule.Items.Add(m.ModuleName);
                }
            }
        }