protected void dgFaculty_ItemCommand(object sender, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            Faculty faculty = new Faculty();

            if (e.CommandName == "AddFaculty")
            {
                TextBox txtTempFaculty = (TextBox)e.Item.Cells[0].FindControl("txtFacultyNew");

                //Validation for faculty (No digit allowed and only up to 50 characters)
                Regex facRegex = new Regex(@"[a-zA-Z() ]{1,50}$");
                Match checkFac = facRegex.Match(txtTempFaculty.Text);


                if (txtTempFaculty.Text.Trim() == "")
                {
                    ClientScript.RegisterStartupScript(this.GetType(), "Error", "<script type='text/javascript'>swal('Error!', 'Please fill in the faculty name!', 'error')</script>'");
                }
                else if (!checkFac.Success)
                {
                    ClientScript.RegisterStartupScript(this.GetType(), "Error", "<script type='text/javascript'>swal('Error!', 'Faculty name can only consist characters or ().', 'error')</script>'");
                }
                else
                {
                    if (faculty.Add(txtTempFaculty.Text) == false)
                    {
                        ClientScript.RegisterStartupScript(this.GetType(), "Error", "<script type='text/javascript'>swal('Error!', 'This " + txtTempFaculty.Text + " faculty is existed!', 'error')</script>'");
                    }
                    else
                    {
                        ClientScript.RegisterStartupScript(this.GetType(), "Success", "<script type='text/javascript'>swal({title: 'Added!', text: 'This " + txtTempFaculty.Text + " faculty is added successfully', type : 'success', confirmButtonText : 'OK'}, function (isConfirm) { if (isConfirm) { window.location.href = 'cpFaculty.aspx'; }});</script>'");
                    }
                }
            }

            else if (e.CommandName == "DeleteFaculty")
            {
                Label rowFacultyID = (Label)e.Item.Cells[0].FindControl("lblID");

                if (faculty.DeleteFaculty(rowFacultyID.Text) == false)
                {
                    ClientScript.RegisterStartupScript(this.GetType(), "Error", "<script type='text/javascript'>swal('Error!', 'Delete this faculty unsuccessfully', 'error')</script>'");
                }
                else
                {
                    ClientScript.RegisterStartupScript(this.GetType(), "Success", "<script type='text/javascript'>swal({title: 'Deleted!', text: 'Deleted this faculty successfully', type : 'success', confirmButtonText : 'OK'}, function (isConfirm) { if (isConfirm) { window.location.href = 'cpFaculty.aspx'; }});</script>'");
                }
            }
        }