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TextBoxBase.TextChanged, événement

Occurs when content changes in the text element.

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

public event TextChangedEventHandler TextChanged
/** @event */
public void add_TextChanged (TextChangedEventHandler value)

/** @event */
public void remove_TextChanged (TextChangedEventHandler value)

En JScript, vous pouvez gérer les événements définis par une classe, mais vous ne pouvez pas définir les vôtres.
<object TextChanged="TextChangedEventHandler" .../>

Identifier Field

TextChangedEvent

Routing Strategy

Bubbling

Delegate

RoutedEventHandler

For a TextBox, this event occurs when its text changes, for a RichTextBox, this event occurs when any content or formatting changes (i.e. images, table, background color, etc).

This example shows one way to use the TextChanged event to execute a method whenever the text in a TextBox control has changed.

In the code-behind class for the XAML that contains the TextBox control that you want to monitor for changes, insert a method to call whenever the TextChanged event fires. This method must have a signature that matches what is expected by the TextChangedEventHandler delegate.

The event handler is called whenever the contents of the TextBox control are changed, either by a user or programmatically.

Note: This event fires when the TextBox control is created and initially populated with text.

In the Extensible Application Markup Language (XAML) that defines your TextBox control, specify the TextChanged attribute with a value that matches the event handler method name.

<TextBox  TextChanged="textChangedEventHandler">
  Here is the initial text in my TextBox.  Each time the contents of this TextBox are changed, 
  the TextChanged event  fires and textChangedEventHandler is called.
</TextBox>

In the code-behind class for the XAML that contains the TextBox control that you want to monitor for changes, insert a method to call whenever the TextChanged event fires. This method must have a signature that matches what is expected by the TextChangedEventHandler delegate.

// TextChangedEventHandler delegate method.
private void textChangedEventHandler(object sender, TextChangedEventArgs args)
{    
    // Omitted Code: Insert code that does something whenever
    // the text changes...
} // end textChangedEventHandler

The event handler is called whenever the contents of the TextBox control are changed, either by a user or programmatically.

Note: This event fires when the TextBox control is created and initially populated with text.

Comments

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.NET Framework

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