Add validation as seen in picture please

CODE

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Reservation Request

Request data

Arrival Date

Departure Date

Number of people

1 2 3 4

Bed type

Special requests

Contact information

First Name

Last Name

Email address

Telephone number

Preferred method

Email Telephone

© Royal Inns and Suites

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using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls;

namespace XEx07Reservation { public partial class Request : System.Web.UI.Page { private string currentDate = DateTime.Today.ToShortDateString(); private string currentYear = DateTime.Today.Year.ToString();

protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { txtArrivalDate.Text = currentDate; lblYear.Text = currentYear; rdoKing.Checked = true; } }

protected void btnSubmit_Click(object sender, EventArgs e) { lblMessage.Text = "Thank you for your request. " + "We will get back to you within 24 hours."; }

protected void btnClear_Click(object sender, EventArgs e) { txtArrivalDate.Text = currentDate; txtDepartureDate.Text = ""; ddlNoOfPeople.SelectedIndex = -1; rdoKing.Checked = true; rdoDouble.Checked = false; rdoSingle.Checked = false; txtSpecialRequests.Text = ""; txtFirstName.Text = ""; txtLastName.Text = ""; txtEmail.Text = ""; txtPhone.Text = ""; ddlPreferredMethod.SelectedIndex = 0; lblMessage.Text = ""; } } }

Royal Inns and Suites Where you're always treated like hayag Reservation Request means that the field is required Request data Arrival Date 7/302016 Must be after arrival date Departure Date 8/1/2015 Number of people 1 Bed type King Two Queens Oone Queen Special requests Contact information First Name Last Name Must be valid email address Email address anne Use this format: 999-999-9999 Telephone number 555-555-55555 Preferred method Emai SubmitClea 2016 Royal Inns and Suites