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PasswordBox Class

Updated: February 2009

Represents a control designed for entering and handling passwords.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
[TemplatePartAttribute(Name = "PART_ContentHost", Type = typeof(FrameworkElement))]
public sealed class PasswordBox : Control
<PasswordBox .../>
Important noteImportant Note:

PasswordBox has built-in handling for the bubbling  MouseUp and MouseDown events. Consequently, custom event handlers that listen for MouseUp or MouseDown events from a PasswordBox will never be called. If you need to respond to these events, listen for the tunneling PreviewMouseUp and PreviewMouseDown events instead, or register the handlers with the HandledEventsToo argument (this latter option is only available through code). Do not mark the event handled unless you deliberately want to disable PasswordBox native handling of these events, and be aware that this has notable effects on the control's UI.

Dependency properties for this control might be set by the control’s default style. If a property is set by a default style, the property might change from its default value when the control appears in the application. The default style is determined by which desktop theme is used when the application is running. For more information, see Themes.

The following example shows how to specify the handler method for the PasswordChanged event.

<PasswordBox
  Name="pwdBox" 
  MaxLength="64"
  PasswordChar="#"
  PasswordChanged="PasswordChangedHandler"  
/>

The following example shows the corresponding event handler. In this case, the event handler simply increments a counter.

private int pwChanges = 0;

void PasswordChangedHandler(Object sender, RoutedEventArgs args)
{
    // Increment a counter each time the event fires.
    ++pwChanges;
}
System.Object
  System.Windows.Threading.DispatcherObject
    System.Windows.DependencyObject
      System.Windows.Media.Visual
        System.Windows.UIElement
          System.Windows.FrameworkElement
            System.Windows.Controls.Control
              System.Windows.Controls.PasswordBox
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

Date

History

Reason

February 2009

Described how default styles change dependency properties.

Customer feedback.

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