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TextChangedEventArgs, classe

Provides data for the TextChanged event.

Espace de noms: System.Windows.Controls
Assembly : PresentationFramework (dans presentationframework.dll)
Espace de noms XML :  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public class TextChangedEventArgs : RoutedEventArgs
public class TextChangedEventArgs extends RoutedEventArgs
public class TextChangedEventArgs extends RoutedEventArgs
Vous ne pouvez pas utiliser cette classe managée dans XAML.

The following example displays the number of times the text in a TextBox changes. 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>

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();
            }

        }
    }
}

System.Object
   System.EventArgs
     System.Windows.RoutedEventArgs
      System.Windows.Controls.TextChangedEventArgs

Les membres statiques publics (Shared en Visual Basic) de ce type sont thread-safe. Il n'est pas garanti que les membres d'instance soient thread-safe.

Microsoft .NET Framework 3.0 est pris en charge sur Windows Vista, Microsoft Windows XP SP2 et Windows Server 2003 SP1.

.NET Framework

Prise en charge dans : 3.0

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