C# Button.Focus方法代码示例

//.........这里部分代码省略.........
					cruiseControlPicker.Items.Add(i);
				}
				cruiseControlPicker.SelectedIndexChanged += (sender, args) =>
				{
					if (cruiseControlPicker.SelectedIndex == 0)
						car.CruiseControl = false;
					else
						car.CruiseControl = true;

					Debug.WriteLine("Cruise Control " + car.CruiseControl);
				};
				// ----------------------------
				trimLabel.Text = "Which Trim?";
				trimLabel.TextColor = Color.FromHex(ThemeColors.PrimaryText);
				List<string> trimList = new List<string> { "LE", "XLE", "SE", "Special Edition", "XSE", "Hybrid LE", "Hybrid SE", "Hybrid XLE" };
				foreach (string i in trimList)
				{
					trimPicker.Items.Add(i);
				}
				trimPicker.SelectedIndexChanged += (sender, args) =>
				{
					car.Trim = trimList.ElementAt(trimPicker.SelectedIndex);

					Debug.WriteLine("Trim: " + car.Trim);
				};
				// ----------------------------
				warrantyLabel.Text = "Warranty Package";
				warrantyLabel.TextColor = Color.FromHex(ThemeColors.PrimaryText);
				List<string> warrantyList = new List<string> { "Standard", "Premium 100k 10 Year" };
				foreach (string i in warrantyList)
				{
					warrantyPicker.Items.Add(i);
				}
				warrantyPicker.SelectedIndexChanged += (sender, args) =>
				{
					if (warrantyPicker.SelectedIndex == 0)
						car.WarrantyProgramType = "Standard";
					else
						car.WarrantyProgramType = "Premium 100k 10 Year";

					Debug.WriteLine("Warranty: " + car.WarrantyProgramType);
				};
				// ----------------------------
				rearBrakeStyleLabel.Text = "Rear Brake Type";
				rearBrakeStyleLabel.TextColor = Color.FromHex(ThemeColors.PrimaryText);
				List<string> brakeList = new List<string> { "Drum", "Disk" };
				foreach (string i in brakeList)
				{
					rearBrakeStylePicker.Items.Add(i);
				}
				rearBrakeStylePicker.SelectedIndexChanged += (sender, args) =>
				{
					if (rearBrakeStylePicker.SelectedIndex == 0)
						car.RearBrakes = "Drum";
					else
						car.RearBrakes = "Disk";

					Debug.WriteLine("Rear Brake Type: " + car.RearBrakes);
				};
				// ----------------------------
				frontBrakeStyleLabel.Text = "Front Brake Type";
				frontBrakeStyleLabel.TextColor = Color.FromHex(ThemeColors.PrimaryText);
				foreach (string i in brakeList)
				{
					frontBrakeStylePicker.Items.Add(i);
				}
				frontBrakeStylePicker.SelectedIndexChanged += (sender, args) =>
				{
					if (frontBrakeStylePicker.SelectedIndex == 0)
						car.FrontBrakes = "Drum";
					else
						car.FrontBrakes = "Disk";

					Debug.WriteLine("Front Brake Type: " + car.FrontBrakes);
				};

				orderCarButton.Clicked += async (sender, e) => {
					car.DeliveryDateToNewDealer =  DateTime.Now;;	
					activityIndicator.IsRunning = true;
					activityIndicator.IsVisible = true;
					orderCarButton.IsEnabled = false;
					await AddItem(car);
					activityIndicator.IsVisible = false;
					activityIndicator.IsRunning = false;
					orderCarConfirmation.Text = "Car Ordered. VIN#: " + car.VIN;
					orderCarConfirmationInstruction.Text = "Please write down number for reference";
					orderCarConfirmation.IsVisible = true;
					orderCarConfirmationInstruction.IsVisible = true;

					stackLayout.BackgroundColor = Color.FromHex (ThemeColors.TextIcons);
					OrderedStack.BackgroundColor = Color.FromHex (ThemeColors.PrimaryDark);
					orderCarConfirmation.BackgroundColor = Color.FromHex (ThemeColors.PrimaryDark);
					orderCarConfirmationInstruction.BackgroundColor = Color.FromHex (ThemeColors.PrimaryDark);
					orderCarConfirmation.TextColor = Color.FromHex (ThemeColors.Accent);
					orderCarConfirmation.FontSize = Device.GetNamedSize (NamedSize.Medium, typeof(Label));
					orderCarConfirmationInstruction.TextColor = Color.FromHex (ThemeColors.TextIcons);
					orderCarConfirmationInstruction.FontSize = Device.GetNamedSize (NamedSize.Micro, typeof(Label));
					orderCarButton.Focus ();
				};
			}

        public NewSurveyPage (string CID)
		{
			//InitializeComponent ();

			this.Padding = new Thickness (20, 20, 20, 5);

			if (Device.OS == TargetPlatform.Android) 
			{
				NavigationPage.SetTitleIcon (this, "opac.png");
				BackgroundColor = Color.FromHex ("#2A2A2A");
			}
            cid = CID;

            Label titleLabel = new Label
            {
                Text = "Create new Survey",
                FontAttributes = FontAttributes.Bold,
                FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)),
                HorizontalOptions = LayoutOptions.CenterAndExpand,
                VerticalOptions = LayoutOptions.StartAndExpand
            };

            editor = new Editor
            {
                Text = "Please insert the question here\n\n\n",
                HorizontalOptions = LayoutOptions.Fill
            };
            if (Device.OS == TargetPlatform.WinPhone)
            {
                editor.BackgroundColor = Color.White;
            }

            Label optionsLabel = new Label
            {
                Text = "Options/Answers",
                HorizontalOptions = LayoutOptions.CenterAndExpand
            };

            //TODO: allow dynmic adding of options for the survey!
            e1 = new Entry { Text = "Option/Answer 1" };
            e1.Completed += (o, s) => { e2.Focus(); };
            e2 = new Entry { Text = "Option/Answer 2" };
            e2.Completed += (o, s) => { e3.Focus(); };
            e3 = new Entry { Text = "" };
            e3.Completed += (o, s) => { e4.Focus(); };
            e4 = new Entry { Text = "" };
            

            Button createButton = new Button
            {
                Text = "Create Survey",
                HorizontalOptions = LayoutOptions.CenterAndExpand,
            };
            createButton.Clicked += createButton_Clicked;

            e4.Completed += (o, s) => { createButton.Focus(); };

            StackLayout stack = new StackLayout
            {
                Orientation = StackOrientation.Vertical,
                Spacing = 30,
                Children = { titleLabel, editor, optionsLabel, e1, e2, e3, e4, createButton },
                VerticalOptions = LayoutOptions.Fill
            };

            Padding = new Thickness(15, 10, 15, 5);
            ScrollView scroll = new ScrollView { Content = stack };
            Content = scroll;
		}