DtsForEachEnumeratorAttribute Class

Articolo
12/15/2008

Supplies design-time information about a ForEachEnumerator object. This class cannot be inherited.

Spazio dei nomi: Microsoft.SqlServer.Dts.Runtime
Assembly : Microsoft.SqlServer.ManagedDTS (in microsoft.sqlserver.manageddts.dll)

Sintassi

'Dichiarazione
<AttributeUsageAttribute(AttributeTargets.Class, Inherited:=False, AllowMultiple:=False)> _
Public NotInheritable Class DtsForEachEnumeratorAttribute
    Inherits DtsLocalizableAttribute

[AttributeUsageAttribute(AttributeTargets.Class, Inherited=false, AllowMultiple=false)] 
public sealed class DtsForEachEnumeratorAttribute : DtsLocalizableAttribute

[AttributeUsageAttribute(AttributeTargets::Class, Inherited=false, AllowMultiple=false)] 
public ref class DtsForEachEnumeratorAttribute sealed : public DtsLocalizableAttribute

/** @attribute AttributeUsageAttribute(AttributeTargets.Class, Inherited=false, AllowMultiple=false) */ 
public final class DtsForEachEnumeratorAttribute extends DtsLocalizableAttribute

AttributeUsageAttribute(AttributeTargets.Class, Inherited=false, AllowMultiple=false) 
public final class DtsForEachEnumeratorAttribute extends DtsLocalizableAttribute

Osservazioni

Codice di esempio aggiornato:15 settembre 2007

This attribute is applied to all managed Foreach enumerator classes and identifies the class as a managed Foreach enumerator to the SQL Server (SSIS) run-time engine. This attribute provides information through its properties to control how the designer displays and interacts with the object. Because all managed enumerators derive from the ForEachEnumerator base class, the first step when creating a custom enumerator is to create a class library project and inherit from the base class. Next, apply the DtsForEachEnumeratorAttribute to the class. This attribute provides the name, description, and user interface design-time information to the designer. The UITypeName property identifies the Type that implements the user interface for the enumerator that is displayed in the ForEachLoop editor. The DisplayName property is displayed in the Toolbox in the SQL Server Business Intelligence Development Studio.

For more information about applying attributes to a class, see "Applying Attributes" in the .NET Framework Developer's Guide.

The attribute is formatted as a comma-delimited string, which can contain the following elements from the Attributes class, in addition to the other attributes declared on the DtsForEachEnumeratorAttribute, such as the UITypeName and the ForEachEnumeratorContact:

Type name
Assembly name
File version
Culture
Public key token

The following string gives an example of how the string is formatted.

[DtsForEachEnumerator(DisplayName="MyEnumerator",UITypeName="MyNamespace.MyEnumeratorClassName,MyAssemblyName",Version="1.00.000.00",Culture="neutral",PublicKeyToken="")]

You can find the values of the Culture and PublicKeyToken parameters in your assembly by examining the properties of the assembly in the global assembly cache (GAC).

Inheritance Hierarchy

System.Object
   System.Attribute
     Microsoft.SqlServer.Dts.Runtime.Localization.DtsLocalizableAttribute
      Microsoft.SqlServer.Dts.Runtime.DtsForEachEnumeratorAttribute

Esempio

The following code sample shows the attribute applied to a new class, with several properties defined, including the DisplayName, Description, ForEachEnumeratorContact, and UITypeName.

using System;
using Microsoft.SqlServer.Dts.Runtime;

namespace Microsoft.Samples.SqlServer.Dts
{
// This attribute marks the class as a managed ForEachEnumerator.
    [DtsForEachEnumerator(DisplayName = "MyEnumerator",
      Description="A managed enumerator",
      UITypeName="<FullyQualifiedTypeName>",
      ForEachEnumeratorContact="Name of company to contact")]
    public class MyEnumerator : ForEachEnumerator
    {
        // Insert your enumerator code here.
    }
}

Imports System
Imports Microsoft.SqlServer.Dts.Runtime

Namespace Microsoft.Samples.SqlServer.Dts
  ' This attribute marks the class as a managed ForEachEnumerator.
  <DtsForEachEnumerator(DisplayName:="MyEnumerator", _
    Description:="A managed enumerator", _
    UITypeName:="<FullyQualifiedTypeName>", _
    ForEachEnumeratorContact:="Name of company to contact")> _
  Public Class MyEnumerator
    Inherits ForEachEnumerator
    ' Insert your enumerator code here.
  End Class
End Namespace

Thread Safety

Any public static (Shared in Microsoft Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Piattaforme

Piattaforme di sviluppo

Per un elenco delle piattaforme supportate, vedere Requisiti hardware e software per l'Installazione di SQL Server 2005.

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