MessageQueuePermissionEntryCollection.Contains 方法

定義

命名空間:

System.Messaging

組件:

System.Messaging.dll

判斷這個集合是否含有指定的 MessageQueuePermissionEntry。

public:
 bool Contains(System::Messaging::MessageQueuePermissionEntry ^ value);

public bool Contains (System.Messaging.MessageQueuePermissionEntry value);

member this.Contains : System.Messaging.MessageQueuePermissionEntry -> bool

Public Function Contains (value As MessageQueuePermissionEntry) As Boolean

參數

value

MessageQueuePermissionEntry

要尋找的 MessageQueuePermissionEntry。

傳回

Boolean

如果指定的 MessageQueuePermissionEntry 屬於這個集合，則為 true，否則為 false。

範例

下列程式碼範例示範 Contains 的用法。

// 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.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));