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Classe DataColEnumerator

This class is used when the ADO enumerator returns a Dataset or Recordset. This enumerator allows you to enumerate over the columns. This class cannot be inherited.

Namespace:  Microsoft.SqlServer.Dts.Runtime.Enumerators.ADO
Assembly:  Microsoft.SqlServer.ForEachADOEnumerator (em Microsoft.SqlServer.ForEachADOEnumerator.dll)

Sintaxe

'Declaração
Public NotInheritable Class DataColEnumerator _
    Implements IEnumerator
'Uso
Dim instance As DataColEnumerator

public sealed class DataColEnumerator : IEnumerator

public ref class DataColEnumerator sealed : IEnumerator

[<SealedAttribute>]
type DataColEnumerator =  
    class
        interface IEnumerator
    end

public final class DataColEnumerator implements IEnumerator

Comentários

The members of this class cannot be used directly. This class is used by the foreach keyword (For Each in Visual Basic). The following code example is a piece of a foreach loop showing simply how to use indexing to place a data column into the enumerator and iterate over it.

Vardisp.LockOneForWrite("VariableThatHadIndexSetToMinus1", vars)

DataColEnumerator dcEnum = (DataColEnumerator)vars[0]
foreach (object o in dcEnum)
{
    // Do something with o, 
    // where o is the value of the column, just as you would get
    // if you had a variable for a specific index.
}

You must set the index for the variable mapping to -1 to retrieve the entire collection into the variable, instead of retrieving just a column which is based on an index, so then you can access it directly.

Hierarquia de herança

System. . :: . .Object
  Microsoft.SqlServer.Dts.Runtime.Enumerators.ADO..::..DataColEnumerator

Segurança de thread

Quaisquer membros static (Shared no Visual Basic) públicos deste tipo são thread-safe. Não há garantia de que qualquer membro de instância seja thread-safe.