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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.

.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.