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.
Hierarquia de herança
System.Object
Microsoft.SqlServer.Dts.Runtime.Enumerators.ADO.DataColEnumerator
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
O tipo DataColEnumerator expõe os membros a seguir.
Propriedades
Nome | Descrição | |
---|---|---|
Current | Infraestrutura. Gets the current object in the collection. |
Início
Métodos
Nome | Descrição | |
---|---|---|
Equals | (Herdado de Object.) | |
GetHashCode | (Herdado de Object.) | |
GetType | (Herdado de Object.) | |
MoveNext | Infraestrutura. Indicates whether the enumerator moves to the next element. | |
Reset | Infraestrutura. Resets the DataColEnumerator to its default configuration. | |
ToString | (Herdado de Object.) |
Início
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.
Segurança de thread
Qualquer membro público static (Shared no Visual Basic) desse tipo é seguro para threads. Não há garantia de que qualquer membro de instância seja seguro para threads.