DataColumn.AllowDBNull Property
Gets or sets a value that indicates whether null values are allowed in this column for rows that belong to the table.
Assembly: System.Data (in System.Data.dll)
'Declaration Public Property AllowDBNull As Boolean 'Usage Dim instance As DataColumn Dim value As Boolean value = instance.AllowDBNull instance.AllowDBNull = value
Property Value
Type: System.Booleantrue if null values values are allowed; otherwise, false. The default is true.
The following example creates a new DataColumn and sets its AllowDBNull property to true.
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, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
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.