DataColEnumerator-Klasse
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 (in Microsoft.SqlServer.ForEachADOEnumerator.dll)
Syntax
'Declaration
Public NotInheritable Class DataColEnumerator _
Implements IEnumerator
'Usage
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
Hinweise
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.
Vererbungshierarchie
System. . :: . .Object
Microsoft.SqlServer.Dts.Runtime.Enumerators.ADO..::..DataColEnumerator
Threadsicherheit
Alle öffentlichen static (Shared in Visual Basic) Member dieses Typs sind threadsicher. Bei Instanzmembern ist die Threadsicherheit nicht gewährleistet.