webform1.aspx.cs

Professional C# 2nd Edition

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using PCSWebApp4.eventDataService;

namespace PCSWebApp4
{
	/// <summary>
	/// Summary description for WebForm1.
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox nameBox;
		protected System.Web.UI.WebControls.RequiredFieldValidator validateName;
		protected System.Web.UI.WebControls.Calendar calendar;
		protected System.Web.UI.WebControls.TextBox eventBox;
		protected System.Web.UI.WebControls.RequiredFieldValidator validateEvent;
		protected System.Web.UI.WebControls.DropDownList roomList;
		protected System.Web.UI.WebControls.RequiredFieldValidator validateRoom;
		protected System.Web.UI.WebControls.ListBox attendeeList;
		protected System.Web.UI.WebControls.RequiredFieldValidator validateAttendees;
		protected System.Web.UI.WebControls.Button submitButton;
		protected System.Web.UI.WebControls.ValidationSummary validationSummary;
		protected System.Web.UI.WebControls.Label resultLabel;
		protected System.Data.DataSet ds;
		protected System.Data.DataTable eventTable;
		protected System.Web.UI.WebControls.DataGrid eventDetails1;
		protected System.Web.UI.WebControls.DataList eventDetails2;
		protected System.Web.UI.WebControls.Label edName;
		protected System.Web.UI.WebControls.Label edDate;
		protected System.Web.UI.WebControls.Label edRoom;
		protected System.Web.UI.WebControls.Label edAttendees;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			ds = (DataSet)Application["ds"];
			attendeeList.DataSource = ds.Tables["Attendees"];
			roomList.DataSource = ds.Tables["Rooms"];
            eventTable = ds.Tables["Events"];
			eventDetails1.DataSource = eventTable;
			eventDetails2.DataSource = eventTable;
			if (!this.IsPostBack)
			{
				System.DateTime trialDate = System.DateTime.Now;
				calendar.SelectedDate = getFreeDate(trialDate);
				this.DataBind();
			}
			else
			{
				eventDetails1.DataBind();
				eventDetails2.DataBind();
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			// 
			// oleDbConnection1
			// 
			this.calendar.DayRender += new System.Web.UI.WebControls.DayRenderEventHandler(this.calendar_DayRender);
			this.calendar.SelectionChanged += new System.EventHandler(this.calendar_SelectionChanged);
			this.submitButton.Click += new System.EventHandler(this.submitButton_Click);
			this.eventDetails2.SelectedIndexChanged += new System.EventHandler(this.eventDetails2_SelectedIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void submitButton_Click(object sender, System.EventArgs e)
		{
			if (this.IsValid)
			{
				String attendees = "";
				foreach (ListItem attendee in attendeeList.Items)
				{
					if (attendee.Selected)
					{
						attendees += attendee.Text + " (" + attendee.Value + "), ";
					}
				}
				attendees += " and " + nameBox.Text;
				String dateString =
					calendar.SelectedDate.Date.Date.ToShortDateString();
				Service1 dataService = new Service1();
				int queryResult = dataService.AddEvent(eventBox.Text,
					roomList.SelectedItem.Value,
					attendees,
					dateString);
				if (queryResult == 1)
				{
					resultLabel.Text = "Event Added.";
					ds = dataService.GetData();
					Application.Lock();
					Application["ds"] = ds;
					Application.UnLock();
					eventTable = ds.Tables["Events"];
					calendar.SelectedDate =
						getFreeDate(calendar.SelectedDate.AddDays(1));
					eventDetails1.DataSource = eventTable;
					eventDetails1.DataBind();
					eventDetails2.DataSource = eventTable;
					eventDetails2.DataBind();
				}
				else
				{
                    resultLabel.Text = "Event not added due to DB access problem.";
				}
			}
		}

		private System.DateTime getFreeDate(System.DateTime trialDate)
		{
			if (eventTable.Rows.Count > 0)
			{
				System.DateTime testDate;
				bool trialDateOK = false;
				while (!trialDateOK)
				{
					trialDateOK = true;
					foreach (System.Data.DataRow testRow in eventTable.Rows)
					{
						testDate = (System.DateTime)testRow["EventDate"];
						if (testDate.Date == trialDate.Date)
						{
							trialDateOK = false;
							trialDate = trialDate.AddDays(1);
						}
					}

				}
			}
			return trialDate;
		}

		private void calendar_SelectionChanged(object sender, System.EventArgs e)
		{
			System.DateTime trialDate = calendar.SelectedDate;
			calendar.SelectedDate = getFreeDate(trialDate);
		}

		private void calendar_DayRender(object sender, System.Web.UI.WebControls.DayRenderEventArgs e)
		{
			if (eventTable.Rows.Count > 0)
			{
				System.DateTime testDate;
				foreach (System.Data.DataRow testRow in eventTable.Rows)
				{
					testDate = (System.DateTime)testRow["EventDate"];
					if (testDate.Date == e.Day.Date)
					{
						e.Cell.BackColor = Color.Red;
					}
				} 
			}
		}

		protected void eventDetails2_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			eventDetails2.DataBind();
			DataRow selectedEventRow =
				eventTable.Rows[eventDetails2.SelectedIndex];
			edName.Text = (string)selectedEventRow["Name"];
			edDate.Text = "<b>Date:</b> " +
				((DateTime)selectedEventRow["EventDate"]).ToLongDateString();
			edAttendees.Text = "<b>Attendees:</b> " +
				(string)selectedEventRow["AttendeeList"];
			DataRow selectedEventRoomRow =
				ds.Tables["Rooms"].Rows[(int)selectedEventRow["Room"] - 1];
			edRoom.Text = "<b>Room:</b> " + selectedEventRoomRow["Room"];
		}
	}
}