/// <summary>
/// update method to update the data in the database
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void UpdateButton(object sender, EventArgs e)
{
em.empid = int.Parse(txtEmpId.Text);
AddDataToEmployee();
user.UpdateEmployeeBAL(em);
user.GetData();
DataTable dt = new DataTable();
dt = user.GetData();
empGrid.DataSource = dt;
ClearData();
}