This documentation is archived and is not being maintained.

MaskedTextBox.ValidateText Method

Converts the user input string to an instance of the validating type.

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

public Object ValidateText()

Return Value

Type: System.Object
If successful, an Object of the type specified by the ValidatingType property; otherwise, null to indicate conversion failure.


A critical exception occurred during the parsing of the input string.

The ValidateText method attempts to convert the formatted string contained in the Text property to an instance of the type that is specified by the ValidatingType property. Prompt characters are ignored in the formatted string, but literals are handled in accordance with the current value of the TextMaskFormat property.

ValidateText raises the TypeValidationCompleted event after the conversion is attempted, regardless of its success.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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, 2.0