PasswordChar Property
This documentation is archived and is not being maintained.

MaskedTextBox.PasswordChar Property

Gets or sets the character to be displayed in substitute for user input.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public char PasswordChar { get; set; }

Property Value

Type: System.Char
The Char value used as the password character.

ExceptionCondition
ArgumentException

The character specified when setting this property is not a valid password character, as determined by the IsValidPasswordChar method of the MaskedTextProvider class.

InvalidOperationException

The password character specified is the same as the current prompt character, PromptChar. The two are required to be different.

For sensitive user input, it is common practice to conceal the actual information entered by the user. If the PasswordChar property is set to a non-null character, MaskedTextBox will display this character for all input into the control. Setting this property to null will disable this functionality.

If you want to use the operating system supplied password character, which is defined in COMCTL32.dll, use the UseSystemPasswordChar property instead. If both the PasswordChar and UseSystemPasswordChar properties are activated, the latter takes precedence.

Important noteImportant

As a security consideration, the MaskedTextBox control disables cut and copy operations on password-protected strings.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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