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PasswordBox.MaxLength Property

Gets or sets the maximum length for passwords to be handled by this PasswordBox.

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
public int MaxLength { get; set; }
<object MaxLength="int" .../>

Property Value

Type: System.Int32
An integer specifying the maximum length, in characters, for passwords to be handled by this PasswordBox.
A value of zero (0) means no limit.
The default value is 0 (no length limit).

Identifier field


Metadata properties set to true


This property only restricts passwords entered manually by the user; it has no effect on programmatic manipulation of the Password property.

The following example shows how to set the MaxLength attribute of a PasswordBox element.


The following example shows how to set the MaxLength property programmatically.

// Set the new maximum input length for passwords to 128 characters.
pwdBox.MaxLength = 128;

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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