MessageQueuePermissionEntryCollection.Contains-Methode

Bestimmt, ob diese Auflistung einen angegebenen MessageQueuePermissionEntry enthält.

Namespace: System.Messaging
Assembly: System.Messaging (in system.messaging.dll)

Syntax

'Declaration
Public Function Contains ( _
    value As MessageQueuePermissionEntry _
) As Boolean
'Usage
Dim instance As MessageQueuePermissionEntryCollection
Dim value As MessageQueuePermissionEntry
Dim returnValue As Boolean

returnValue = instance.Contains(value)

public bool Contains (
    MessageQueuePermissionEntry value
)

public:
bool Contains (
    MessageQueuePermissionEntry^ value
)

public boolean Contains (
    MessageQueuePermissionEntry value
)

public function Contains (
    value : MessageQueuePermissionEntry
) : boolean

Parameter

• value
  Der zu suchende MessageQueuePermissionEntry.

Rückgabewert

true, wenn der angegebene MessageQueuePermissionEntry zu dieser Auflistung gehört, andernfalls false.

Beispiel

Im folgenden Codebeispiel wird die Verwendung des Contains veranschaulicht.

// Connect to a queue on the local computer.
MessageQueue queue = new MessageQueue(".\\exampleQueue");

// Create a new instance of MessageQueuePermission.
MessageQueuePermission permission = new MessageQueuePermission();

// Get an instance of MessageQueuePermissionEntryCollection from the
// permission's PermissionEntries property.
MessageQueuePermissionEntryCollection collection =
    permission.PermissionEntries;

// Create a new instance of MessageQueuePermissionEntry.
MessageQueuePermissionEntry entry = new MessageQueuePermissionEntry(
    MessageQueuePermissionAccess.Receive,
    queue.MachineName,
    queue.Label,
    queue.Category.ToString());

// Add the entry to the collection.
collection.Add(entry);

// Show that the collection contains the entry.
Console.WriteLine("Collection contains first entry (true/false): {0}",
    collection.Contains(entry));

// Create another new instance of MessageQueuePermissionEntry.
MessageQueuePermissionEntry newEntry = new MessageQueuePermissionEntry(
    MessageQueuePermissionAccess.Send,
    queue.MachineName,
    queue.Label,
    queue.Category.ToString());

// Show that the collection does not contain the new entry.
Console.WriteLine("Collection contains second entry (true/false): {0}",
    collection.Contains(newEntry));

// Connect to a queue on the local computer.
MessageQueue^ queue = gcnew MessageQueue(".\\exampleQueue");

// Create a new instance of MessageQueuePermission.
MessageQueuePermission^ permission = gcnew MessageQueuePermission();

// Get an instance of MessageQueuePermissionEntryCollection from the
// permission's PermissionEntries property.
MessageQueuePermissionEntryCollection^ collection =
    permission->PermissionEntries;

// Create a new instance of MessageQueuePermissionEntry.
MessageQueuePermissionEntry^ entry = gcnew MessageQueuePermissionEntry(
    MessageQueuePermissionAccess::Receive, 
    queue->MachineName, 
    queue->Label, 
    queue->Category.ToString());

// Add the entry to the collection.
collection->Add(entry);

// Show that the collection contains the entry.
Console::WriteLine("Collection contains first entry (true/false): {0}",
    collection->Contains(entry));

// Create another new instance of MessageQueuePermissionEntry.
MessageQueuePermissionEntry^ newEntry = 
    gcnew MessageQueuePermissionEntry(
    MessageQueuePermissionAccess::Send, 
    queue->MachineName, 
    queue->Label, 
    queue->Category.ToString());

// Show that the collection does not contain the new entry.
Console::WriteLine(
    "Collection contains second entry (true/false): {0}",
    collection->Contains(newEntry));

queue->Close();

// Connect to a queue on the local computer.
MessageQueue queue = new MessageQueue(".\\exampleQueue");
// Create a new instance of MessageQueuePermission.
MessageQueuePermission permission = new MessageQueuePermission();
// Get an instance of MessageQueuePermissionEntryCollection from the
// permission's PermissionEntries property.
MessageQueuePermissionEntryCollection collection =
    permission.get_PermissionEntries();
// Create a new instance of MessageQueuePermissionEntry.
MessageQueuePermissionEntry entry =
    new MessageQueuePermissionEntry(MessageQueuePermissionAccess.Receive,
    queue.get_MachineName(), queue.get_Label(),
    queue.get_Category().ToString());
// Add the entry to the collection.
collection.Add(entry);
// Show that the collection contains the entry.
Console.WriteLine("Collection contains first entry (true/false): {0}",
    ((System.Boolean)collection.Contains(entry)).ToString());
// Create another new instance of MessageQueuePermissionEntry.
MessageQueuePermissionEntry newEntry =
    new MessageQueuePermissionEntry(MessageQueuePermissionAccess.Send,
    queue.get_MachineName(), queue.get_Label(),
    queue.get_Category().ToString());
// Show that the collection does not contain the new entry.
Console.WriteLine("Collection contains second entry (true/false): {0}",
    ((System.Boolean)collection.Contains(newEntry)).ToString());

.NET Framework-Sicherheit

• Volle Vertrauenswürdigkeit für den unmittelbaren Aufrufer. Dieser Member kann von nur teilweise vertrauenswürdigem Code nicht verwendet werden. Weitere Informationen finden Sie unter .

Plattformen

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

MessageQueuePermissionEntryCollection-Klasse
MessageQueuePermissionEntryCollection-Member
System.Messaging-Namespace