C# Label.SetBinding方法代码示例

        public ClubMemberViewCell()
        {

            nameTGR = new TapGestureRecognizer();
            nameTGR.Tapped += NameTGR_Tapped;

            ch = new ColorHandler();
            iEmoji = new Image
            {
                Aspect = Aspect.AspectFit,
                WidthRequest = 75,
                HorizontalOptions = LayoutOptions.StartAndExpand,
                VerticalOptions = LayoutOptions.Center
            };
            iEmoji.SetBinding(Image.SourceProperty, "Emoji");
            lUsername = new Label
            {
                HorizontalOptions = LayoutOptions.CenterAndExpand,
                FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)),
                VerticalOptions = LayoutOptions.Center
            };
            lUsername.SetBinding(Label.TextProperty, "Username");
            lUsername.SetBinding(Label.TextColorProperty, "UserColor", converter: new ColorConverter());
            lUsername.GestureRecognizers.Add(nameTGR);
            updateView();
        }

        public IdeaItemCell()
        {
            var ideaLabel = new Label
            {
                TextColor = StyleKit.PrimaryTextColor,
                FontSize = Device.GetNamedSize(NamedSize.Medium, typeof(Label))
            };
            ideaLabel.SetBinding(Label.TextProperty, new Binding("Name"));

            var ratingLabel = new Label
            {
                TextColor = StyleKit.SecondaryTextColor,
                FontSize = Device.GetNamedSize(NamedSize.Small, typeof(Label))
            };
            ideaLabel.SetBinding(Label.TextProperty, new Binding("Rating", BindingMode.OneWay, null, null, "Rating: {0}"));

            var layout = new StackLayout
            {
                Padding = new Thickness(20, 0, 0, 0),
                Orientation = StackOrientation.Vertical,
                HorizontalOptions = LayoutOptions.StartAndExpand,
                Children = { ideaLabel, ratingLabel }
            };

            View = layout;
        }

        private void updateView()
        {
            iEmoji = new Image
            {
                Aspect = Aspect.AspectFit,
                WidthRequest = 75,
                HorizontalOptions = LayoutOptions.StartAndExpand,
                VerticalOptions = LayoutOptions.Center
            };
            iEmoji.SetBinding(Image.SourceProperty, "Emoji");

            lUsername = new Label
            {
                HorizontalOptions = LayoutOptions.CenterAndExpand,
                FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)),
                VerticalOptions = LayoutOptions.Center
            };
            lUsername.SetBinding(Label.TextProperty, "Username");
            lUsername.SetBinding(Label.TextColorProperty, "UserColor", converter: new ColorConverter());

            bAddFriend = new Button
            {
                Text = "+",
                FontAttributes = FontAttributes.Bold,
                TextColor = ch.fromStringToColor("gray"),
                BackgroundColor = ch.fromStringToColor("white"),
                HorizontalOptions = LayoutOptions.EndAndExpand,
                VerticalOptions = LayoutOptions.Center
            };
            bAddFriend.Clicked += BAddFriend_Clicked;

            bFriendsIndicator = new Button
            {
                BackgroundColor = ch.fromStringToColor("yellow"),
                BorderRadius = 100,
                HeightRequest = 20,
                WidthRequest = 20,
                HorizontalOptions = LayoutOptions.EndAndExpand,
                VerticalOptions = LayoutOptions.Center,
                IsVisible = false
            };

            View = new StackLayout
            {
                Children ={
                    iEmoji,
                    lUsername,
                    bAddFriend,
                    bFriendsIndicator
                },
                Orientation = StackOrientation.Horizontal,
                HorizontalOptions = LayoutOptions.FillAndExpand,
                Padding = new Thickness(10, 0, 10, 0),
                BackgroundColor = ch.fromStringToColor("white")
            };
        }

		protected override void Init ()
		{
			var listView = new ListView ();

			var selection = new Selection ();
			listView.SetBinding (ListView.ItemsSourceProperty, "Items");

			listView.ItemTemplate = new DataTemplate (() => {
				var cell = new SwitchCell ();
				cell.SetBinding (SwitchCell.TextProperty, "Name");
				cell.SetBinding (SwitchCell.OnProperty, "IsSelected", BindingMode.TwoWay);
				return cell;
			});

			var instructions = new Label {
				FontSize = 16,
				Text =
					"The label at the bottom should equal the number of switches which are in the 'on' position. Flip some of the switches. If the number at the bottom does not equal the number of 'on' switches, the test has failed."
			};

			var label = new Label { FontSize = 24 };
			label.SetBinding (Label.TextProperty, "SelectedCount");

			Content = new StackLayout {
				VerticalOptions = LayoutOptions.Fill,
				Children = {
					instructions,
					listView,
					label
				}
			};

			BindingContext = selection;
		}

		protected override void Init ()
		{
			var entry = new Entry {
				Text = "Setec Astronomy",
				FontFamily = "Comic Sans MS",
				HorizontalTextAlignment = TextAlignment.Center,
				Keyboard = Keyboard.Chat
			};

			var label = new Label ();
			var binding = new Binding ("Text") { Source = entry };

			var otherEntry = new Entry ();
			var otherBinding = new Binding ("Text") { Source = entry, Mode = BindingMode.TwoWay };
			otherEntry.SetBinding (Entry.TextProperty, otherBinding);

			label.SetBinding (Label.TextProperty, binding);

			var explanation = new Label() {Text = @"The Text value of the entry at the top should appear in the label and entry below, regardless of whether 'IsPassword' is on. 
Changes to the value in the entry below should be reflected in the entry at the top."};

			var button = new Button { Text = "Toggle IsPassword" };
			button.Clicked += (sender, args) => { entry.IsPassword = !entry.IsPassword; };

			Content = new StackLayout {
				Children = { entry, button, explanation, label, otherEntry }
			};
		}

        public FacebookLoginPage(FacebookConnection connection)
        {
            this.Title = "FacebookLoginPage";

         //   Connection = new FacebookConnection(key, secret, scope);
         //   connection.SignInCompleted += Connection_SignInCompleted;
            
            this._Connection = connection;

            this._Browser = new WebView();
			//_Browser.Source = new UrlWebViewSource() { Url = _Connection.LoginUri().AbsoluteUri };
            this._Connection.SignIn(this._Browser);

			Label lbl = new Label ()
			{ Text = "Connecting..." };
			lbl.SetBinding(Label.IsVisibleProperty, "IsVisible", BindingMode.OneWay, new BooleanInverterConverter());
            lbl.BindingContext = this._Browser;

            this._BaseLayout = new StackLayout()
            {
				Orientation = StackOrientation.Vertical,
				HorizontalOptions = LayoutOptions.FillAndExpand,
				VerticalOptions = LayoutOptions.FillAndExpand,
			};

            this._BaseLayout.Children.Add(lbl);
            this._BaseLayout.Children.Add(this._Browser);

            this._Browser.IsVisible = false;
                        	

            Padding = new Thickness(0, Device.OnPlatform(20, 0, 0), 0, 0);  // Accomodate iPhone status bar.
            Content = this._BaseLayout;
        }

		public PersonCell ()
		{
			var grid = new Grid{ 
				RowDefinitions = new RowDefinitionCollection {
					new RowDefinition {Height = new GridLength (1, GridUnitType.Star)},
					new RowDefinition {Height = GridLength.Auto},
				},
				ColumnDefinitions = new ColumnDefinitionCollection {
					new ColumnDefinition {Width = new GridLength (1, GridUnitType.Star)},
					new ColumnDefinition {Width = GridLength.Auto},
				}
			};
			Label label;
			grid.Children.Add (label = new Label {BackgroundColor = Color.Lime});
			label.SetBinding (Label.TextProperty, "FirstName");			

			grid.Children.Add (label = new Label (),0,1);
			label.SetBinding (Label.TextProperty, "LastName");			

#pragma warning disable 618
			grid.Children.Add (label = new Label {XAlign = TextAlignment.End},1,0);
#pragma warning restore 618
			label.SetBinding (Label.TextProperty, "Zip");			

#pragma warning disable 618
			grid.Children.Add (label = new Label {XAlign = TextAlignment.End},1,1);
#pragma warning restore 618
			label.SetBinding (Label.TextProperty, "City");
			View = grid;

			
		}

        public historyCell()
        {
            var NameLabel = new Label()
            {
                FontFamily = "HelveticaNeue-Medium",
                FontSize = 18,
                TextColor = Color.Black,
                HorizontalOptions = LayoutOptions.FillAndExpand
            };
            NameLabel.SetBinding(Label.TextProperty, "Name");

            var DescriptionLabel = new Label()
            {
                FontAttributes = FontAttributes.Bold,
                FontSize = 18,
                TextColor = Color.FromHex("#666"),

            };
            DescriptionLabel.SetBinding(Label.TextProperty, "omschrijving");

            var cellLayout = new StackLayout
            {
                Spacing = 0,
                Padding = new Thickness(10, 5, 10, 5),
                Orientation = StackOrientation.Vertical,
                HorizontalOptions = LayoutOptions.FillAndExpand,
                Children = { NameLabel,DescriptionLabel},
            };

            this.View = cellLayout;
        }

        public VerbruiktArtikelCell()
        {
            var nameLabel = new Label()
            {
                FontFamily = "HelveticaNeue-Medium",
                FontSize = 18,
                TextColor = Color.Black
            };
            nameLabel.SetBinding(Label.TextProperty, "Name");

            var aantalLabel = new Label()
            {
                FontAttributes = FontAttributes.Bold,
                FontSize = 18,
                TextColor = Color.Black
            };
            aantalLabel.SetBinding(Label.TextProperty, "aantal");

            var cellLayout = new StackLayout
            {
                Padding = new Thickness(10, 5, 10, 5),
                Orientation = StackOrientation.Horizontal,
                HorizontalOptions = LayoutOptions.FillAndExpand,
                Children = { nameLabel, aantalLabel },
            };

            this.View = cellLayout;
        }

        public CustomListViewCellItem()
        {
            CustomLayout masterLayout = new CustomLayout();
            masterLayout.BackgroundColor = Color.White;//Constants.LIST_BG_COLOR;
            double screenWidth = App.screenWidth;
            double screenHeight = App.screenHeight;
            Label name = new Label();
            name.SetBinding(Label.TextProperty, "Name");
            name.TextColor = Color.Black;
            name.FontFamily = Constants.HELVERTICA_NEUE_LT_STD;
            int fontSize = 15;
            //name.FontSize = 18;
            if (App.screenDensity > 1.5)
            {
                fontSize = 17;
            }
            else
            {
                fontSize = 15;
            }
            name.FontSize = Device.OnPlatform( fontSize, fontSize, 22 );

            StackLayout divider = new StackLayout();
            divider.WidthRequest = screenWidth;
            divider.HeightRequest = 1;
            divider.BackgroundColor = Color.FromRgb(220, 220, 220);

            masterLayout.WidthRequest = screenWidth * 60 / 100;
            masterLayout.HeightRequest = screenHeight * Device.OnPlatform(30, 30, 7) / 100;

            masterLayout.AddChildToLayout(name, (float)5, (float)Device.OnPlatform(5, 5, 50), (int)masterLayout.WidthRequest, (int)masterLayout.HeightRequest);
            masterLayout.AddChildToLayout(divider, 0, (float)Device.OnPlatform(20, 20, 5), (int)masterLayout.WidthRequest, (int)masterLayout.HeightRequest);

            this.View = masterLayout;
        }

		public Issue1236 ()
		{
			Content = new Label { HeightRequest = 30, WidthRequest = 200, BackgroundColor = Color.Purple.WithLuminosity (.7) };
			Content.SetBinding (Label.TextProperty, ".");

			DelayUpdatingBindingContext ();
		}

        public CSPage()
        {
            BindingContext = new ViewModel.PageViewModel();

            var editor = new Editor { Text = "", HorizontalOptions = LayoutOptions.FillAndExpand };
            editor.SetBinding(Editor.TextProperty, "Message");

            switcher = new Switch {  };
            //switcher.SetBinding(Switch.IsToggledProperty, "Toggled");
            switcher.PropertyChanged += (object sender, PropertyChangedEventArgs e) =>
            {
                sclabel.SetBinding(Label.TextProperty,
                new Binding("Message",
                    converter: new Converters.StringCaseConverter(),
                    converterParameter: switcher.IsToggled));
            };

            var label = new Label
            {
                Text = "",
                HorizontalOptions = LayoutOptions.FillAndExpand,
                FontSize = 30
            };
            label.SetBinding(Label.TextProperty, "Message");

            sclabel = new Label
            {
                Text = "",
                HorizontalOptions = LayoutOptions.FillAndExpand,
                FontSize = 30
            };

            var sllabel = new Label
            {
                Text = "",
                HorizontalOptions = LayoutOptions.FillAndExpand,
                FontSize = 30
            };
            sllabel.SetBinding(Label.TextProperty,
                new Binding("Message",
                    converter: new Converters.StringToLengthConverter(),
                    stringFormat: "{0} letters"));

            Title = "Mvvm w/ C#";
            Content = new StackLayout
            {
                Padding = new Thickness(20, 5),
                Children = {
                    editor,
                    switcher,
                    label,
                    sclabel,
                    sllabel
                }
            };
        }

        public CSViewModelConverterPage()
        {
            BindingContext = new ViewModel.CommonViewModel();

            var editor = new Editor
            {
                Text = "",
                HorizontalOptions = LayoutOptions.FillAndExpand,
            };
            editor.SetBinding(Editor.TextProperty, "Message");
            var label = new Label
            {
                Text = "",
                FontSize = 30,
                HorizontalOptions = LayoutOptions.FillAndExpand,
            };
            label.SetBinding(Label.TextProperty, "Message");
            var sclabel = new Label
            {
                Text = "",
                FontSize = 30,
                HorizontalOptions = LayoutOptions.FillAndExpand,
            };
            sclabel.SetBinding(Label.TextProperty,
                new Binding("Message",
                    converter: new Converters.StringCaseConverter(),
                    converterParameter: "True"));
            var sllabel = new Label
            {
                Text = "",
                FontSize = 30,
                HorizontalOptions = LayoutOptions.FillAndExpand,
            };
            sllabel.SetBinding(Label.TextProperty,
                new Binding("Message",
                    converter: new Converters.StringToLengthConverter(),
                    stringFormat: "{0} letters"));

            var stack = new StackLayout
            {
                Spacing = 20,
                Children = {
                    editor,
                    label,
                    sclabel,
                    sllabel,
                },
            };

            Padding = 30;
            Title = "ViewModel bindig (C#)";
            Content = stack;
        }

        public NumberItemPage()
        {
            this.SetBinding(ContentPage.TitleProperty, "Name");

            var label = new Label
            {
                HorizontalOptions = LayoutOptions.Center,
                VerticalOptions = LayoutOptions.Center
            };
            label.SetBinding(Label.TextProperty, "Name");

            this.Content = label;
        }

 public FriendsListViewCell()
 {
     ch = new ColorHandler();
     Image userEmoji = new Image
     {
         Aspect = Aspect.AspectFit,
         WidthRequest = 50,
         HorizontalOptions = LayoutOptions.Center
     };
     userEmoji.SetBinding(Image.SourceProperty, "UserEmoji");
     var lUserName = new Label
     {
         HorizontalOptions = LayoutOptions.Center,
         VerticalOptions = LayoutOptions.Center
     };
     lUserName.SetBinding(Label.TextProperty, "Username");
     lUserName.SetBinding(Label.TextColorProperty, "Color", converter: new ColorConverter());
     Button friendshipIndicator = new Button // TODO: custom renderer
     {
         HeightRequest = 50,
         WidthRequest = 50,
         HorizontalOptions = LayoutOptions.CenterAndExpand,
         VerticalOptions = LayoutOptions.Center
     };
     friendshipIndicator.SetBinding(Button.BackgroundColorProperty, "SharedClubIndicator");
     View = new StackLayout
     {
         Children =
         {
             userEmoji,
             lUserName,
             friendshipIndicator
         },
         BackgroundColor = ch.fromStringToColor("white"),
         Orientation = StackOrientation.Horizontal,
         HorizontalOptions = LayoutOptions.CenterAndExpand
     };
 }