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ScriptBuffer.IsNull Method

Returns a value that indicates whether the value of the specified column is Nothing.

Namespace:  Microsoft.SqlServer.Dts.Pipeline
Assembly:  Microsoft.SqlServer.TxScript (in Microsoft.SqlServer.TxScript.dll)

'Declaration
Protected Function IsNull ( _
	ColumnIndex As Integer _
) As Boolean
'Usage
Dim ColumnIndex As Integer 
Dim returnValue As Boolean 

returnValue = Me.IsNull(ColumnIndex)

Parameters

ColumnIndex
Type: Int32
The index of the column.

Return Value

Type: Boolean
true if the value of the specified column is Nothing; otherwise, false.

The Script component developer does not use the ScriptBuffer class directly, but indirectly, through the derived classes in the BufferWrapper project item that represent the component's input and outputs.

The developer does not have to use the IsNull method, because the derived classes contain a <ColumnX>_IsNull property for each column.

The following sample code from the autogenerated BufferWrapper project item demonstrates how the Script component uses the IsNull method.

    Public Property [city_IsNull] As Boolean
        Get
            Return IsNull(1)
        End Get
        Set
            SetNull(1)
        End Set
    End Property
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