public static void DataGridViewDisplayDataTable(DataGridView dataGridView, restDataSet restDataSet, DataTable dataTable)
        {
            dataGridView.AutoGenerateColumns = true;
            int index = restDataSet.Tables.IndexOf(dataTable);

            dataGridView.DataSource = restDataSet;
            dataGridView.DataMember = restDataSet.Tables[index].TableName;
        }
        public static void FillComboBox(DataTable dataTable, DataGridView dataGridView, ComboBox comboBox, restDataSet restDataSet, int Col)
        {
            int index = restDataSet.Tables.IndexOf(dataTable);

            string[] combo_box_data = new string[restDataSet.Tables[index].Rows.Count];
            int      i = 0;

            foreach (DataRow r in restDataSet.Tables[index].Rows)
            {
                combo_box_data[i] = r.Field <int>(Col) + "";
                i++;
            }
            comboBox.DataSource = combo_box_data;
        }