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SqlParameter.IsNullable Property

Gets or sets a value that indicates whether the parameter accepts null values. IsNullable is not used to validate the parameter’s value and will not prevent sending or receiving a null value when executing a command.

Namespace:  System.Data.SqlClient
Assembly:  System.Data (in System.Data.dll)

'Declaration
Public Overrides Property IsNullable As Boolean

Property Value

Type: System.Boolean
true if null values are accepted; otherwise false. The default is false.

Implements

IDataParameter.IsNullable

Null values are handled using the DBNull class.

The following example creates a SqlParameter and sets some of its properties.

Private Sub CreateSqlParameterNullable()
    Dim parameter As New SqlParameter("Description", SqlDbType.VarChar, 88)
    parameter.IsNullable = True
    parameter.Direction = ParameterDirection.Output
End Sub

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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