Indicates whether the value of the data item at the specified index is unspecified, that is, nulla null reference (Nothing in Visual Basic).
Namespace: Microsoft.VisualStudio.Data.Framework.AdoDotNet
Assembly: Microsoft.VisualStudio.Data.Framework (in Microsoft.VisualStudio.Data.Framework.dll)
Syntax
'Declaration
Public Overrides Function IsNullItem ( _
index As Integer _
) As Boolean
'Usage
Dim instance As AdoDotNetReader
Dim index As Integer
Dim returnValue As Boolean
returnValue = instance.IsNullItem(index)
public override bool IsNullItem(
int index
)
public:
virtual bool IsNullItem(
int index
) override
public override function IsNullItem(
index : int
) : boolean
Parameters
index
Type: System.Int32Index of the data item to examine.
Return Value
Type: System.Boolean
true if the item is null, that is, unspecified; otherwise false.
Implements
IVsDataReader.IsNullItem(Int32)
Remarks
Calling this method to determine whether a value is null performs better than retrieving the value to see whether it is equal to Value because, if the value is not null, the latter technique causes the entire value to be read from the reader.
.NET Framework Security
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.