main.cs

using System;
using CoreGraphics;
using System.Net;
using Foundation;
using UIKit;
using SystemConfiguration;
using CoreFoundation;

namespace reachability {
	public partial class ReachabilityAppDelegate : UIApplicationDelegate {
		UITableView tableView;
		NetworkStatus remoteHostStatus, internetStatus, localWifiStatus;

		public override bool FinishedLaunching (UIApplication app, NSDictionary options)
		{
			AddTable ();
			UpdateStatus ();
			Reachability.ReachabilityChanged += (object sender, EventArgs e) =>  { UpdateStatus (); };

			window.MakeKeyAndVisible ();

			return true;
		}

		void UpdateStatus ()
		{
			remoteHostStatus = Reachability.RemoteHostStatus ();
			internetStatus = Reachability.InternetConnectionStatus ();
			localWifiStatus = Reachability.LocalWifiConnectionStatus ();
			tableView.ReloadData ();
		}

		void AddTable ()
		{
			CGRect tableFrame = UIScreen.MainScreen.ApplicationFrame;

			tableView = new UITableView (tableFrame, UITableViewStyle.Grouped) {
				AutoresizingMask = UIViewAutoresizing.FlexibleWidth | UIViewAutoresizing.FlexibleHeight,
				RowHeight = 44.0f,
				SeparatorStyle = UITableViewCellSeparatorStyle.None,
				SectionHeaderHeight = 28.0f,
				ScrollEnabled = false,

				Source = new DataSource (this),
			};

			contentView.InsertSubviewBelow (tableView, summaryLabel);
			contentView.BringSubviewToFront (summaryLabel);
			tableView.ReloadData ();
		}

		class DataSource : UITableViewSource {
			ReachabilityAppDelegate parent;
			UIImage imageCarrier, imageWiFi, imageStop;

			public DataSource (ReachabilityAppDelegate parent)
			{
				imageCarrier = UIImage.FromFile ("WWAN5.png");
				imageWiFi = UIImage.FromFile ("Airport.png");
				imageStop = UIImage.FromFile ("stop-32.png");

				this.parent = parent;
			}

			public override NSIndexPath WillSelectRow (UITableView view, NSIndexPath index)
			{
				return null;
			}

			public override nint RowsInSection (UITableView view, nint section)
			{
				return 1;
			}

			public override nint NumberOfSections (UITableView view)
			{
				return 3;
			}

			public override string TitleForHeader (UITableView view, nint section)
			{
				switch (section) {
				case 0:
					return Reachability.HostName;
				case 1:
					return "Access to internet hosts";
				case 2:
					return "Access to Local Bonjour Hosts";
				default:
					return "Unknown";
				}
			}

			static NSString ReachabilityTableCellIdentifier = new NSString ("ReachabilityTableCell");

			public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
			{
				var cell = tableView.DequeueReusableCell (ReachabilityTableCellIdentifier);
				if (cell == null) {
					cell = new UITableViewCell (UITableViewCellStyle.Default, ReachabilityTableCellIdentifier);
					var label = cell.TextLabel;
					label.Font = UIFont.SystemFontOfSize (12f);
					label.TextColor = UIColor.DarkGray;
					label.TextAlignment = UITextAlignment.Left;
				}

				var row = indexPath.Row;
				string text = "";
				UIImage image = null;
				switch (indexPath.Section) {
				case 0:
					switch (parent.remoteHostStatus) {
					case NetworkStatus.NotReachable:
						text = "Cannot connect to remote host";
						image = imageStop;
						break;
					case NetworkStatus.ReachableViaCarrierDataNetwork:
						text = "Reachable via data carrier network";
						image = imageCarrier;
						break;
					case NetworkStatus.ReachableViaWiFiNetwork:
						text = "Reachable via WiFi network";
						image = imageWiFi;
						break;
					}
					break;
				case 1:
					switch (parent.internetStatus) {
					case NetworkStatus.NotReachable:
						text = "Access not available";
						image = imageStop;
						break;
					case NetworkStatus.ReachableViaCarrierDataNetwork:
						text = "Available via data carrier network";
						image = imageCarrier;
						break;
					case NetworkStatus.ReachableViaWiFiNetwork:
						text = "Available via WiFi network";
						image = imageWiFi;
						break;
					}
					break;
				case 2:
					switch (parent.localWifiStatus) {
					case NetworkStatus.NotReachable:
						text = "Access not available";
						image = imageStop;
						break;
					case NetworkStatus.ReachableViaWiFiNetwork:
						text = "Available via WiFi network";
						image = imageWiFi;
						break;
					}
					break;
				}
				cell.TextLabel.Text = text;
				cell.ImageView.Image = image;
				return cell;
			}
		}

		static void Main (string[] args)
		{
			UIApplication.Main (args, null, (string)null);
		}
	}
}