• Articolo

Convert.DBNull Field

Microsoft Silverlight will reach end of support after October 2021. Learn more.

A constant representing a database column absent of data; that is, database null.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Shared ReadOnly DBNull As Object

public static readonly Object DBNull

Remarks

The DBNull field is equivalent to DBNull.Value, as the following example shows.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.