TextChangedEventArgs TextChangedEventArgs TextChangedEventArgs TextChangedEventArgs Class

Definición

Proporciona datos para el evento TextChanged.Provides data for the TextChanged event.

public ref class TextChangedEventArgs : System::Windows::RoutedEventArgs
public class TextChangedEventArgs : System.Windows.RoutedEventArgs
type TextChangedEventArgs = class
    inherit RoutedEventArgs
Public Class TextChangedEventArgs
Inherits RoutedEventArgs
Herencia
TextChangedEventArgsTextChangedEventArgsTextChangedEventArgsTextChangedEventArgs

Ejemplos

El ejemplo siguiente muestra el número de veces que el texto en un TextBox cambios.The following example displays the number of times the text in a TextBox changes. A continuación es el código XAML del ejemplo.Below is the XAML code for the example.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    
  x:Class="SDKSample.DetectChangedTextExample"
  Title="DetectChangedText">
  <StackPanel>
    <TextBox
      Name="tbCountingChanges"    
      TextChanged="textChangedEventHandler"
      TextWrapping="Wrap">
      Here is the initial text in the textbox.  Each time the contents of this box is changed, a change counter will
      be incremented and displayed in the TextBox below.  Note that the TextChanged event is called when the TextBox
      control is initially populated with text, so the changes counter starts of at 1.
    </TextBox>
    <TextBox Name="tbCounterText">0</TextBox>
    
  </StackPanel>  
</Page>

A continuación, se muestra el código subyacente para el ejemplo.Below is the code behind for the example.

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;

namespace SDKSample
{
 
    public partial class DetectChangedTextExample : Page
    {

        // This is a counter for the number of times the TextChanged fires
        // for the tbCountingChanges TextBox.
        private int uiChanges = 0;

        // Event handler for TextChanged Event.
        private void textChangedEventHandler(object sender, TextChangedEventArgs args)
        {

            uiChanges++;
            if (tbCounterText != null)
            {
                tbCounterText.Text = uiChanges.ToString();
            }

        }
    }
}

Namespace SDKSample

    Partial Public Class DetectChangedTextExample
        Inherits Page

        ' This is a counter for the number of times the TextChanged fires
        ' for the tbCountingChanges TextBox.
        Private uiChanges As Integer = 0

        ' Event handler for TextChanged Event.
        Private Sub textChangedEventHandler(ByVal sender As Object,
                                            ByVal args As TextChangedEventArgs)

            uiChanges += 1
            If tbCounterText IsNot Nothing Then
                tbCounterText.Text = uiChanges.ToString()
            End If

        End Sub
    End Class
End Namespace

Constructores

TextChangedEventArgs(RoutedEvent, UndoAction) TextChangedEventArgs(RoutedEvent, UndoAction) TextChangedEventArgs(RoutedEvent, UndoAction) TextChangedEventArgs(RoutedEvent, UndoAction)

Inicializa una nueva instancia de la clase TextChangedEventArgs, usando el identificador de evento y la acción de deshacer especificados.Initializes a new instance of the TextChangedEventArgs class, using the specified event ID and undo action.

TextChangedEventArgs(RoutedEvent, UndoAction, ICollection<TextChange>) TextChangedEventArgs(RoutedEvent, UndoAction, ICollection<TextChange>) TextChangedEventArgs(RoutedEvent, UndoAction, ICollection<TextChange>) TextChangedEventArgs(RoutedEvent, UndoAction, ICollection<TextChange>)

Inicializa una nueva instancia de la clase TextChangedEventArgs, usando el identificador de evento, la acción de deshacer y los cambios de texto especificados.Initializes a new instance of the TextChangedEventArgs class, using the specified event ID, undo action, and text changes.

Propiedades

Changes Changes Changes Changes

Obtiene una colección de objetos que contiene información sobre los cambios efectuados.Gets a collection of objects that contains information about the changes that occurred.

Handled Handled Handled Handled

Obtiene o establece un valor que indica el estado actual del control de eventos para un evento enrutado cuando recorre la ruta.Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route.

(Inherited from RoutedEventArgs)
OriginalSource OriginalSource OriginalSource OriginalSource

Obtiene el origen inicial de los informes determinado por pruebas de acceso puro, antes de que una clase primaria realice posibles ajustes de Source.Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class.

(Inherited from RoutedEventArgs)
RoutedEvent RoutedEvent RoutedEvent RoutedEvent

Obtiene o establece el RoutedEvent asociado a esta instancia RoutedEventArgs.Gets or sets the RoutedEvent associated with this RoutedEventArgs instance.

(Inherited from RoutedEventArgs)
Source Source Source Source

Obtiene o establece una referencia al objeto que generó el evento.Gets or sets a reference to the object that raised the event.

(Inherited from RoutedEventArgs)
UndoAction UndoAction UndoAction UndoAction

Obtiene cómo se produce la pila de deshacer o se ve afectada por este cambio de textoGets how the undo stack is caused or affected by this text change

Métodos

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el objeto especificado es igual al objeto actual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Inherited from Object)
InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object)

Realiza la conversión de tipos adecuada para llamar al delegado TextChangedEventHandler con seguridad de tipos para el evento TextChanged.Performs the proper type casting to call the type-safe TextChangedEventHandler delegate for the TextChanged event.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficial del Object actual.Creates a shallow copy of the current Object.

(Inherited from Object)
OnSetSource(Object) OnSetSource(Object) OnSetSource(Object) OnSetSource(Object)

Cuando se invalida en una clase derivada, proporciona una entrada de devolución de llamada de notificación cada vez que seleccione el valor de la Source propiedad de los cambios de la instancia.When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.

(Inherited from RoutedEventArgs)
ToString() ToString() ToString() ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Inherited from Object)

Se aplica a