C# Controls.TextBox类代码示例

        /// <summary>
        /// Called when [element changed].
        /// </summary>
        /// <param name="e">The e.</param>
        protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
        {
            base.OnElementChanged(e);
            if(Element == null )
            {
                return;
            }
            var view = (ExtendedEntry)Element;

            //Because Xamarin EntryRenderer switches the type of control we need to find the right one
            if (view.IsPassword)
            {
                _thisPasswordBox = (PasswordBox) (Control.Content as Windows.UI.Xaml.Controls.Grid).Children.FirstOrDefault(c => c is PasswordBox);
            }
            else
            {
                _thisPhoneTextBox = (TextBox) (Control.Content as Windows.UI.Xaml.Controls.Grid).Children.FirstOrDefault(c => c is TextBox); 
            }

            SetFont(view);
            SetTextAlignment(view);
            SetBorder(view);
            SetPlaceholderTextColor(view);
            SetMaxLength(view);
            SetIsPasswordRevealButtonEnabled(view);

        }

 /// <summary>
 /// Применить к текстовому полю.
 /// </summary>
 /// <param name="box">Текстовое поле.</param>
 public void ApplyToTextBox(TextBox box)
 {
     if (box != null)
     {
         box.Text = provider.SetMarkup(box.Text, tag, box.SelectionStart, box.SelectionLength);
     }
 }

 private void addImage_Tapped(object sender, TappedRoutedEventArgs e)
 {
     numIngredients++;
     TextBox newTxtBox = new TextBox();
     newTxtBox.Name = "Ingredient"+ numIngredients;
     newTxtBox.Margin = new Thickness(10, 0, 0, 0);
     if (!flagColumn)
     {
         newTxtBox.SetValue(Grid.RowProperty, addImage.GetValue(Grid.RowProperty));
         newTxtBox.SetValue(Grid.ColumnProperty, 0);
         IngredientsGrid.RowDefinitions.Add(new RowDefinition());
         addImage.SetValue(Grid.RowProperty, ((int)addImage.GetValue(Grid.RowProperty) + 1));
     }
     else
     {
         newTxtBox.SetValue(Grid.RowProperty, lastRow);
         newTxtBox.SetValue(Grid.ColumnProperty, 1);
         lastRow++;
     }
     IngredientsGrid.Children.Remove(addImage);
     IngredientsGrid.UpdateLayout();
     IngredientsGrid.Children.Add(newTxtBox);
     IngredientsGrid.UpdateLayout();
     IngredientsGrid.Children.Add(addImage);
     IngredientsGrid.UpdateLayout();
     IngredientsPanel.UpdateLayout();
     numberTxtBox++;
     if(numberTxtBox % 4 == 0)
     {
         flagColumn = !flagColumn;
     }
    // IngredientsPanel.Children.Add(addImage);
 }

        static public bool HandleException(Exception exception, TextBox outputField, MainPage rootPage)
        {
            SyndicationErrorStatus status = SyndicationError.GetStatus(exception.HResult);
            if (status != SyndicationErrorStatus.Unknown)
            {
                outputField.Text += "The response content is not valid. " +
                    "Please make sure to use a URI that points to an Atom feed.\r\n";
            }
            else
            {
                WebErrorStatus webError = WebError.GetStatus(exception.HResult);

                if (webError == WebErrorStatus.Unauthorized)
                {
                    outputField.Text += "Incorrect username or password.\r\n";
                }
                else if (webError == WebErrorStatus.Unknown)
                {
                    // Neither a syndication nor a web error.
                    return false;
                }
            }

            rootPage.NotifyUser(exception.Message, NotifyType.ErrorMessage);

            return true;
        }

        public void InitializeComponent()
        {
            if (_contentLoaded)
                return;

            _contentLoaded = true;
            Application.LoadComponent(this, new System.Uri("ms-appx:///CommentPage.xaml"), Windows.UI.Xaml.Controls.Primitives.ComponentResourceLocation.Application);
 
            pageRoot = (TheBellyofAuthority.Common.LayoutAwarePage)this.FindName("pageRoot");
            commentBar = (Windows.UI.Xaml.Controls.AppBar)this.FindName("commentBar");
            DeleteButton = (Windows.UI.Xaml.Controls.Button)this.FindName("DeleteButton");
            EditButton = (Windows.UI.Xaml.Controls.Button)this.FindName("EditButton");
            commentThread = (Windows.UI.Xaml.Controls.ListView)this.FindName("commentThread");
            commentLabel = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("commentLabel");
            commentBox = (Windows.UI.Xaml.Controls.TextBox)this.FindName("commentBox");
            postButton = (Windows.UI.Xaml.Controls.Button)this.FindName("postButton");
            backButton = (Windows.UI.Xaml.Controls.Button)this.FindName("backButton");
            pageTitle = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("pageTitle");
            UserPanel = (Windows.UI.Xaml.Controls.StackPanel)this.FindName("UserPanel");
            progBar = (Windows.UI.Xaml.Controls.ProgressBar)this.FindName("progBar");
            LabelBox = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("LabelBox");
            UserBox = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("UserBox");
            ApplicationViewStates = (Windows.UI.Xaml.VisualStateGroup)this.FindName("ApplicationViewStates");
            FullScreenLandscape = (Windows.UI.Xaml.VisualState)this.FindName("FullScreenLandscape");
            Filled = (Windows.UI.Xaml.VisualState)this.FindName("Filled");
            FullScreenPortrait = (Windows.UI.Xaml.VisualState)this.FindName("FullScreenPortrait");
            Snapped = (Windows.UI.Xaml.VisualState)this.FindName("Snapped");
        }

        /// <summary>
        /// Sets up the player dialog labels and text boxes for names.
        /// </summary>
        public LocalGameDialog()
        {
            this.InitializeComponent();
            PlayerNames = new List<TextBox>();

            for (var i = 0; i < 6; i++)
            {

                var block = new TextBlock()
                {
                    Text = "Player " + (i + 1),
                    Foreground = ((PlayerNumber) (i + 1)).Color(),
                    VerticalAlignment = VerticalAlignment.Center

                };

                var box = new TextBox
                {
                    VerticalAlignment = VerticalAlignment.Center,
                    Height = 32,
                    MaxLength = 8

                };

                PlayerGrid.Children.Add(block);
                Grid.SetColumn(block, 0);
                Grid.SetRow(block, i);

                PlayerGrid.Children.Add(box);
                Grid.SetColumn(box, 1);
                Grid.SetRow(box,i);

                PlayerNames.Add(box);
            }
        }

        public static void SetAlwaysScrollToEnd(TextBox textBox, bool alwaysScrollToEnd)
        {
            if (textBox == null)
                throw new ArgumentNullException(nameof(textBox));

            textBox.SetValue(AlwaysScrollToEndProperty, alwaysScrollToEnd);
        }

        public void InitializeComponent()
        {
            if (_contentLoaded)
                return;

            _contentLoaded = true;
            Application.LoadComponent(this, new System.Uri("ms-appx:///Tweet.xaml"), Windows.UI.Xaml.Controls.Primitives.ComponentResourceLocation.Application);
 
            pageRoot = (Mu_genotype1.Common.LayoutAwarePage)this.FindName("pageRoot");
            primaryColumn = (Windows.UI.Xaml.Controls.ColumnDefinition)this.FindName("primaryColumn");
            titlePanel = (Windows.UI.Xaml.Controls.Grid)this.FindName("titlePanel");
            itemListScrollViewer = (Windows.UI.Xaml.Controls.ScrollViewer)this.FindName("itemListScrollViewer");
            itemListScrollViewer2 = (Windows.UI.Xaml.Controls.ScrollViewer)this.FindName("itemListScrollViewer2");
            PeerTweets = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("PeerTweets");
            itemListView2 = (Windows.UI.Xaml.Controls.ListView)this.FindName("itemListView2");
            TweetBox = (Windows.UI.Xaml.Controls.TextBox)this.FindName("TweetBox");
            TweetIt = (Windows.UI.Xaml.Controls.Button)this.FindName("TweetIt");
            PinPanel = (Windows.UI.Xaml.Controls.StackPanel)this.FindName("PinPanel");
            itemListView = (Windows.UI.Xaml.Controls.ListView)this.FindName("itemListView");
            PinTb = (Windows.UI.Xaml.Controls.TextBox)this.FindName("PinTb");
            VerifyPinButton = (Windows.UI.Xaml.Controls.Button)this.FindName("VerifyPinButton");
            backButton = (Windows.UI.Xaml.Controls.Button)this.FindName("backButton");
            pageTitle = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("pageTitle");
            pageSubtitle = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("pageSubtitle");
            FullScreenLandscape = (Windows.UI.Xaml.VisualState)this.FindName("FullScreenLandscape");
            Filled = (Windows.UI.Xaml.VisualState)this.FindName("Filled");
            FullScreenPortrait = (Windows.UI.Xaml.VisualState)this.FindName("FullScreenPortrait");
            FullScreenPortrait_Detail = (Windows.UI.Xaml.VisualState)this.FindName("FullScreenPortrait_Detail");
            Snapped = (Windows.UI.Xaml.VisualState)this.FindName("Snapped");
            Snapped_Detail = (Windows.UI.Xaml.VisualState)this.FindName("Snapped_Detail");
            TwitterConnectBtn = (Windows.UI.Xaml.Controls.Button)this.FindName("TwitterConnectBtn");
            RefreshButton = (Windows.UI.Xaml.Controls.Button)this.FindName("RefreshButton");
        }

 public TextBoxHelper(TextBox textBox)
 {
     textBox.TextChanged += (o, a) =>
         {
             textBox.SetValue(BindableTextProperty, textBox.Text);
         };
 }

        public void CreateField(DetailFormHelper helper, FieldData fieldData)
        {
            var text = fieldData as TextFieldData;
            int row;
            var textBlock  = helper.AddRow(text, out row);

            var textBox = new TextBox
            {
                TextWrapping = TextWrapping.Wrap,
                Text = DetailFormHelper.GetValueAsString(helper.DataElement, text.name, fieldData.defaultValue),
                Margin = new Thickness(5),
            };

            var lineHeight = Math.Max(1, text.lineHeight);
            textBox.Height = 20 * lineHeight;
            if (lineHeight > 1)
            {
                textBlock.VerticalAlignment = VerticalAlignment.Top;
                textBox.AcceptsReturn = true;
            }

            Grid.SetColumn(textBox, 1);
            Grid.SetRow(textBox, row);

            helper.GridFields.Children.Add(textBox);

            helper.BindingActions.Add(
                () => helper.DataElement.set(text.name, textBox.Text));
        }

        public void InitializeComponent()
        {
            if (_contentLoaded)
                return;

            _contentLoaded = true;
            Application.LoadComponent(this, new System.Uri("ms-appx:///HomePage.xaml"), Windows.UI.Xaml.Controls.Primitives.ComponentResourceLocation.Application);
 
            pageRoot = (_8Tracks.Common.LayoutAwarePage)this.FindName("pageRoot");
            groupedItemsViewSource = (Windows.UI.Xaml.Data.CollectionViewSource)this.FindName("groupedItemsViewSource");
            passwordPrompt = (Windows.UI.Xaml.Controls.Grid)this.FindName("passwordPrompt");
            itemGridView = (Windows.UI.Xaml.Controls.GridView)this.FindName("itemGridView");
            itemListView = (Windows.UI.Xaml.Controls.ListView)this.FindName("itemListView");
            backButton = (Windows.UI.Xaml.Controls.Button)this.FindName("backButton");
            pageTitle = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("pageTitle");
            loginText = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("loginText");
            loginBox = (Windows.UI.Xaml.Controls.TextBox)this.FindName("loginBox");
            passwordText = (Windows.UI.Xaml.Controls.TextBlock)this.FindName("passwordText");
            passwordBox = (Windows.UI.Xaml.Controls.PasswordBox)this.FindName("passwordBox");
            doneButton = (Windows.UI.Xaml.Controls.Button)this.FindName("doneButton");
            ApplicationViewStates = (Windows.UI.Xaml.VisualStateGroup)this.FindName("ApplicationViewStates");
            FullScreenLandscape = (Windows.UI.Xaml.VisualState)this.FindName("FullScreenLandscape");
            Filled = (Windows.UI.Xaml.VisualState)this.FindName("Filled");
            FullScreenPortrait = (Windows.UI.Xaml.VisualState)this.FindName("FullScreenPortrait");
            Snapped = (Windows.UI.Xaml.VisualState)this.FindName("Snapped");
        }

 /// <summary>
 /// Constructor for the WP8 chat app.
 /// </summary>
 public ChatAppWinRT(TextBox currentMessageInputBox, TextBlock chatHistory, ScrollViewer chatHistoryScroller)
     : base("WinRT", ConnectionType.TCP)
 {
     this.CurrentMessageInputBox = currentMessageInputBox;
     this.ChatHistory = chatHistory;
     this.ChatHistoryScroller = chatHistoryScroller;
 }

        private void TextBox_KeyDown(object sender, Windows.UI.Xaml.Input.KeyRoutedEventArgs e)
        {
            var textBox = sender as TextBox;
            NewToDoItemNameTextBox = textBox;

            if (!string.IsNullOrEmpty(textBox.Text)
                && textBox.Text.Length > 3)
            {
                if (AddNewItemConfirmButton != null)
                    AddNewItemConfirmButton.IsEnabled = true;

                if (e.Key == Windows.System.VirtualKey.Enter)
                {
                    // Handle 'Enter' key for keyboard users
                    if (e.Key == Windows.System.VirtualKey.Enter)
                    {
                        e.Handled = true;
                        CreateNewToDoItem(textBox);
                    }
                }
            }
            else
            {
                if (AddNewItemConfirmButton != null)
                    AddNewItemConfirmButton.IsEnabled = false;
            }
        }

        // returns a rect for selected text
        // if no text is selected, returns caret location
        // textbox should not be empty
        private Rect GetTextboxSelectionRect(TextBox textbox)
        {
            Rect rectFirst, rectLast;
            if (textbox.SelectionStart == textbox.Text.Length)
            {
                rectFirst = textbox.GetRectFromCharacterIndex(textbox.SelectionStart - 1, true);
            }
            else
            {
                rectFirst = textbox.GetRectFromCharacterIndex(textbox.SelectionStart, false);
            }

            int lastIndex = textbox.SelectionStart + textbox.SelectionLength;
            if (lastIndex == textbox.Text.Length)
            {
                rectLast = textbox.GetRectFromCharacterIndex(lastIndex - 1, true);
            }
            else
            {
                rectLast = textbox.GetRectFromCharacterIndex(lastIndex, false);
            }

            rectFirst.Union(rectLast);

            GeneralTransform transform = textbox.TransformToVisual(null);
            return transform.TransformBounds(rectFirst);
        }

        public TextSearchFilter(ICollectionView filteredView, TextBox textBox)
        {
            string filterText = "";

           /* filteredView.Filter = delegate(object obj)
            {

                if (string.IsNullOrEmpty(filterText))
                    return true;

                string str = obj as string;

                if (string.IsNullOrEmpty(str))
                    return false;

                int index = str.IndexOf(filterText, 0, StringComparison.CurrentCultureIgnoreCase);

                return index > -1;

            };
            textBox.TextChanged += delegate
            {
                filterText = textBox.Text;
                filteredView.Refresh();
            };**/
        }