SqlCeResultSet.IsDBNull Method

Article
10/22/2007

Determines if the field at the specified ordinal position is a null reference (Nothing in Visual Basic).

Namespace: System.Data.SqlServerCe
Assembly: System.Data.SqlServerCe (in system.data.sqlserverce.dll)

Syntax

'Declaration
Public Overrides Function IsDBNull ( _
    ordinal As Integer _
) As Boolean
'Usage
Dim instance As SqlCeResultSet
Dim ordinal As Integer
Dim returnValue As Boolean

returnValue = instance.IsDBNull(ordinal)

public override bool IsDBNull (
    int ordinal
)

public:
virtual bool IsDBNull (
    int ordinal
) override

public boolean IsDBNull (
    int ordinal
)

public override function IsDBNull (
    ordinal : int
) : boolean

Parameters

ordinal
The ordinal position of the column from which to retrieve the value.

Return Value

True if the specified field is a null reference (Nothing in Visual Basic); otherwise, false.

Remarks

Returns true only if the corresponding value is equivalent to DBNull or if the object implements IsNullable and IsNull returns true.

Returns false in any other case, including a null reference (Nothing in Visual Basic) references and empty strings.

An IndexOutOfRangeException is thrown if no field exists at the specified index.

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see .

Platforms

Windows CE, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows XP Professional x64 Edition, Windows XP SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

Version Information

.NET Compact Framework

Supported in: 2.0