alert.cs

//
// Alerts sample in C#
//

using System;
using MonoTouch.UIKit;
using MonoTouch.Foundation;
using System.Drawing;

public partial class AlertsViewController : UITableViewController {

	// Load our definition from the NIB file
	public AlertsViewController () : base ("AlertsViewController", null)
	{
	}

	struct AlertSample {
		public string Title, Label, Source;

		public AlertSample (string t, string l, string s)
		{
			Title = t;
			Label = l;
			Source = s;
		}
	}

	static AlertSample [] samples;

	static AlertsViewController ()
	{
		samples = new AlertSample [] {
			new AlertSample ("UIActionSheet", "Show simple", "alert.cs: DialogSimpleAction ()"),
			new AlertSample ("UIActionSheet", "Show OK Cancel", "alert.cs: DialogOkCancelAction ()"),
			new AlertSample ("UIActionSheet", "Show Customized", "alert.cs: DialogOtherAction ()"),
			new AlertSample ("UIAlertView", "Show simple", "alert.cs: AlertSimpleAction ()"),
			new AlertSample ("UIAlertView", "Show OK Cancel", "alert.cs: AlertOkCancelAction ()"),
			new AlertSample ("UIAlertView", "Show Customized ", "alert.cs: AlertOtherAction ()"),
		};
	}
		
	public override void ViewDidLoad ()
	{
		base.ViewDidLoad ();
		Title = "Alerts";

		TableView.DataSource = new DataSource ();
		TableView.Delegate = new TableDelegate (this);
	}

	void DialogSimpleAction ()
	{
		var actionSheet = new UIActionSheet ("UIActionSheet <title>", null, null, "OK", null){
			Style = UIActionSheetStyle.Default
		};
		actionSheet.Clicked += delegate (object sender, UIButtonEventArgs args){
			Console.WriteLine ("Clicked on item {0}", args.ButtonIndex);
		};

		actionSheet.ShowInView (View);
	}

	void DialogOkCancelAction ()
	{
		var actionSheet = new UIActionSheet ("UIActionSheet <title>", null, "Cancel", "OK", null){
			Style = UIActionSheetStyle.Default
		};
		actionSheet.Clicked += delegate (object sender, UIButtonEventArgs args){
			Console.WriteLine ("Clicked on item {0}", args.ButtonIndex);
		};

		actionSheet.ShowInView (View);
	}

	void DialogOtherAction ()
	{
		var actionSheet = new UIActionSheet ("UIActionSheet <title>", null, "Cancel", "OK", "Other1"){
			Style = UIActionSheetStyle.Default
		};
		actionSheet.Clicked += delegate (object sender, UIButtonEventArgs args){
			Console.WriteLine ("Clicked on item {0}", args.ButtonIndex);
		};

		actionSheet.ShowInView (View);
	}
	
	void AlertSimpleAction ()
	{
		using (var alert = new UIAlertView ("UIAlertView", "<Alert Message>", null, "OK", null))
			alert.Show ();
	}

	void AlertOkCancelAction ()
	{
		using (var alert = new UIAlertView ("UIAlertView", "<Alert Message>", null, "Cancel", "OK"))
		       alert.Show ();
	}

	void AlertOtherAction ()
	{
		using (var alert = new UIAlertView ("UIAlertView", "<Alert Message>", null, "Cancel", "Button1", "Button2"))
		       alert.Show ();
		
	}
       
#region Delegates for the table
	class DataSource : UITableViewDataSource {
		static NSString kDisplayCell_ID = new NSString ("AlertCellID");
		static NSString kSourceCell_ID = new NSString ("SourceCellID");
		
		public override int NumberOfSections (UITableView tableView)
		{
			return samples.Length;
		}

		public override string TitleForHeader (UITableView tableView, int section)
		{
			return samples [section].Title;
		}

		public override int RowsInSection (UITableView tableView, int section)
		{
			return 2;
		}

		public override UITableViewCell GetCell (UITableView tableView, NSIndexPath indexPath)
		{
			UITableViewCell cell;

			if (indexPath.Row == 0){
				cell = tableView.DequeueReusableCell (kDisplayCell_ID);
				if (cell == null)
					cell = new UITableViewCell (UITableViewCellStyle.Default, kDisplayCell_ID);
				cell.TextLabel.Text = samples [indexPath.Section].Label;
			} else {
				cell = tableView.DequeueReusableCell (kSourceCell_ID);
				if (cell == null){
					cell = new UITableViewCell (UITableViewCellStyle.Default, kSourceCell_ID){
						SelectionStyle = UITableViewCellSelectionStyle.None
					};
					var label = cell.TextLabel;
					label.Opaque = false;
					label.TextAlignment = UITextAlignment.Center;
					label.TextColor = UIColor.Gray;
					label.Lines = 2;
					label.Font = UIFont.SystemFontOfSize (12f);
				}
				cell.TextLabel.Text = samples [indexPath.Section].Source;
			}

			return cell;
		}
	}

	class TableDelegate : UITableViewDelegate {
		AlertsViewController avc;
		
		public TableDelegate (AlertsViewController avc)
		{
			this.avc = avc;
		}
			
		public override float GetHeightForRow (UITableView tableView, NSIndexPath indexPath)
		{
			return indexPath.Row == 0 ? 50f : 22f;
		}

		public override void RowSelected (UITableView tableView, NSIndexPath indexPath)
		{
			// deselect current row
			tableView.DeselectRow (tableView.IndexPathForSelectedRow, true);

			if (indexPath.Row == 0){
				switch (indexPath.Section){
				case 0:
					avc.DialogSimpleAction ();
					break;
				case 1:
					avc.DialogOkCancelAction ();
					break;
					
				case 2:
					avc.DialogOtherAction ();
					break;
					
				case 3:
					avc.AlertSimpleAction ();
					break;
					
				case 4:
					avc.AlertOkCancelAction ();
					break;
					
				case 5:
					avc.AlertOtherAction ();
					break;
				}
			}
		}
	}
#endregion
}