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MaskedTextBox.PromptChar Property

Gets or sets the character used to represent the absence of user input in MaskedTextBox.

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

public char PromptChar { get; set; }

Property Value

Type: System.Char
The character used to prompt the user for input. The default is an underscore (_).

ExceptionCondition
ArgumentException

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

InvalidOperationException

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

PromptChar will be displayed in MaskedTextBox for any mask position that the user has not yet filled in.

Use the HidePromptOnLeave property to specify whether the prompt is displayed when MaskedTextBox does not have focus.

.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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