SqlCeResultSet.IsDBNull Method

Article
2009-10-22

Determines if the field at the specified ordinal position is null.

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

Syntax

'Declaration
Public Overrides Function IsDBNull ( _
    ordinal As Integer _
) As Boolean

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 null; 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 null references and empty strings.

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

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Development Platforms

Windows Vista, Windows Mobile 5.0, Windows XP Professional with Service Pack 2 (SP2), Windows Server 2003, Windows Mobile 2003 for Pocket PC, Windows CE 5.0
Version Information
.NET Framework and NET Compact Framework
Supported in 3.5
.NET Framework
Supported in 3.0
.NET Compact Framework and .Net Framework
Supported in 2.0

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