重构后的内容如下：
MessageQueue 类及其引用定义和重要说明：
1. 引用定义：`public ref class MessageQueue : System::ComponentModel::Component, System::Collections::IEnumerable`
2. 重要说明：本文档中包含的信息与发布前的预览版产品有关，这些信息在发布前可能会发生重大更改。微软对此不提供任何明示或暗示的保证。
MessageQueue 类的功能：提供了访问 Message Queuing 服务器上队列的访问权限。
```csharp
using System;
using System.ComponentModel;
using System.Messaging;
public class MessageQueue : Component, IEnumerable
{
// ... other properties and methods ...
}
public class Example : IDisposable
{
private MessageQueue _queue;
public Example()
{
_queue = new MessageQueue(new System.Messaging.MessageQueueDescription("MessageQueueDesc"));
}
public void Dispose()
{
if (_queue != null)
{
_queue.Dispose();
_queue = null;
}
}
}
```
```csharp
using System;
using System.Messaging;
namespace QueueExample
{
class Program
{
static void Main(string[] args)
{
MyNewQueue myNewQueue = new MyNewQueue();
myNewQueue.SendPublic();
myNewQueue.SendPrivate();
myNewQueue.SendByLabel();
myNewQueue.SendByFormatName();
myNewQueue.MonitorComputerJournal();
myNewQueue.MonitorQueueJournal();
myNewQueue.MonitorDeadLetter();
myNewQueue.MonitorTransactionalDeadLetter();
}
}
public class MyNewQueue
{
private const string PublicQueuePath = ".\myQueue";
private const string PrivateQueuePath = ".\\Private$\\myQueue";
private const string LabelQueuePath = "Label:TheLabel";
private const string FormatNameQueuePath = "FormatName:Public=5A5F7535-AE9A-41d4 -935C-845C2AFF7112";
private const string JournalQueuePath = ".\\Journal$";
private const string DeadLetterQueuePath = ".\\DeadLetter$";
private const string XactDeadLetterQueuePath = ".\\XactDeadLetter$";
public void SendPublic()
{
SendMessage(PublicQueuePath);
}
public void SendPrivate()
{
SendMessage(PrivateQueuePath);
}
public void SendByLabel()
{
SendMessage(LabelQueuePath);
}
public void SendByFormatName()
{
SendMessage(FormatNameQueuePath);
}
public void MonitorComputerJournal()
{
MonitorMessage(JournalQueuePath);
}
public void MonitorQueueJournal()
{
MonitorMessage(PrivateQueuePath + "\\Journal$"); // Assuming there is a journal for this queue path. If not, you'll need to implement the journal monitoring logic separately.
}
public void MonitorDeadLetter()
{
MonitorMessage(DeadLetterQueuePath); // Assuming there is a dead letter message waiting in this queue path. If not, you'll need to implement the dead letter monitoring logic separately.
}
public void MonitorTransactionalDeadLetter()
{
MonitorMessage(XactDeadLetterQueuePath); // Assuming there is a transactional dead letter message waiting in this queue path. If not, you'll need to implement the transactional dead letter monitoring logic separately. } ///
{ MessageQueue^ myQueue = gcnew MessageQueue(queuePath); myQueue->Send("Test message"); // Process the message after sending } ///
```csharp
using System;
using System.Messaging;
namespace MyProject
{
///
/// Provides a container class for the example.
///
public class MyNewQueue
{
//**************************************************
// Provides an entry point into the application.
// This example demonstrates several ways to set
// a queue's path.
//**************************************************
public static void Main()
{
// Create a new instance of the class.
MyNewQueue myNewQueue = new MyNewQueue();
myNewQueue.SendPublic();
myNewQueue.SendPrivate();
myNewQueue.SendByLabel();
myNewQueue.SendByFormatName();
myNewQueue.MonitorComputerJournal();
myNewQueue.MonitorQueueJournal();
myNewQueue.MonitorDeadLetter();
myNewQueue.MonitorTransactionalDeadLetter();
return;
}
// References public queues.
public void SendPublic()
{
MessageQueue myQueue = new MessageQueue(".\\myQueue");
myQueue.Send("Public queue by path name.");
return;
}
// References private queues.
public void SendPrivate()
{
MessageQueue myQueue = new MessageQueue(".\\Private$\\myQueue");
myQueue.Send("Private queue by path name.");
return;
}
// References queues by label.
public void SendByLabel()
{
MessageQueue myQueue = new MessageQueue("Label:TheLabel");
myQueue.Send("Queue by label.");
return;
}
// References queues by format name.
public void SendByFormatName()
{
MessageQueue myQueue = new MessageQueue("FormatName:Public=5A5F7535-AE9A-41d4" + "-935C-845C2AFF7112");
myQueue.Send("Queue by format name.");
return;
}
// References computer journal queues.
public void MonitorComputerJournal()
{
MessageQueue computerJournal = new MessageQueue(".\\Journal$");
while (true)
{
Message journalMessage = computerJournal.Receive();
// Process the journal message.
}
}
// References queue journal queues.
public void MonitorQueueJournal()
{
MessageQueue queueJournal = new MessageQueue(".\\myQueue\\Journal$");
while (true)
{
Message journalMessage = queueJournal.Receive();
// Process the journal message.
}
}
// References dead-letter queues.
public void MonitorDeadLetter()
{
MessageQueue deadLetter = new MessageQueue(".\\DeadLetter$");
while (true)
{
Message deadMessage = deadLetter.Receive();
// Process the dead-letter message.
}
}
// References transactional dead-letter queues.
public void MonitorTransactionalDeadLetter()
{
MessageQueue TxDeadLetter = new MessageQueue(".\\XactDeadLetter$");
while (true)
{
Message txDeadLetter = TxDeadLetter.Receive();
// Process the transactional dead-letter message.
}
}
} } } ```
以下是重构后的代码：
```csharp
Imports System.Messaging
Public Class MyNewQueue
' 提供应用程序的入口点。
' 本示例演示了几种设置队列路径的方法。
Public Shared Sub Main()
' 创建类的新实例。
Dim myNewQueue As New MyNewQueue()
myNewQueue.SendPublic()
myNewQueue.SendPrivate()
myNewQueue.SendByLabel()
myNewQueue.SendByFormatName()
myNewQueue.MonitorComputerJournal()
myNewQueue.MonitorQueueJournal()
myNewQueue.MonitorDeadLetter()
myNewQueue.MonitorTransactionalDeadLetter()
Return
End Sub
' 引用公共队列。
Public Sub SendPublic()
Dim myQueue As New MessageQueue(".\myQueue")
myQueue.Send("Public queue by path name.")
Return
End Sub
' 引用私有队列。
Public Sub SendPrivate()
Dim myQueue As New MessageQueue(".\Private$\myQueue")
myQueue.Send("Private queue by path name.")
Return
End Sub
' 引用带有标签的队列。
Public Sub SendByLabel()
Dim myQueue As New MessageQueue("Label:TheLabel")
myQueue.Send("Queue by label.")
Return
End Sub
' 引用通过格式名称的队列。
Public Sub SendByFormatName()
Dim myQueue As New _
MessageQueue("FormatName:Public=" + _
"5A5F7535-AE9A-41d4-935C-845C2AFF7112")
myQueue.Send("Queue by format name.")
Return
End Sub
' 引用计算机日志队列。
Public Sub MonitorComputerJournal()
Dim computerJournal As New MessageQueue(".\Journal$")
While True
Dim journalMessage As Message = computerJournal.Receive()
' 处理日志消息。
End While
Return
End Sub
' 引用队列日志队列。
Public Sub MonitorQueueJournal()
Dim queueJournal As New _ MessageQueue(".\myQueue\Journal$")
While True
Dim journalMessage As Message = queueJournal.Receive()
' 处理日志消息。
End While
Return
End Sub
' 引用死信队列。
Public Sub MonitorDeadLetter()
Dim deadLetter As New MessageQueue(".\DeadLetter$")
While True
Dim deadMessage As Message = deadLetter.Receive()
' 处理死信消息。
End While
Return
End Sub
' 引用事务性死信队列。
Public Sub MonitorTransactionalDeadLetter()
Dim TxDeadLetter As New MessageQueue(".\XactDeadLetter$")
While True
Dim txDeadLetterMessage As Message = TxDeadLetter.Receive()
' 处理事务性死信消息。
End While
Return
End Sub
End Class
```
Order
If you need to make an order, here are a few steps that will guide you through the process:
1. Choose your product or service: Determine what you want to buy or hire. This could be anything from groceries to a new car. Make sure you have all the necessary information about the product or service, such as specifications, prices, and availability.
2. Place your order: Once you have decided on what you want to buy or hire, it's time to place your order. You can do this in various ways, such as online, over the phone, or in-person at a store. Make sure you provide all the necessary information, such as your name, address, and payment details.
3. Wait for your order to be processed: After placing your order, you will need to wait for it to be processed. This may take some time depending on the product or service you ordered. During this time, you can check the status of your order using the tracking number or other contact information provided by the company.
4. Receive your order: Once your order is processed and shipped, you will receive it at your specified address. Make sure you check the packaging carefully to ensure that everything is in good condition and that there are no damages. If there are any issues with your order, contact the company as soon as possible to resolve them.
```csharp
using System;
using System.Messaging;
// This class represents an object the following example
// sends to a queue and receives from a queue.
public class Order
{
public int orderId;
public DateTime orderTime;
}
///
/// Provides a container class for the example.
///
public class MyNewQueue
{
//*************************************************
// Sends an Order to a queue.
//*************************************************
public void SendMessage()
{
// Create a new order and set values.
Order^ sentOrder = gcnew Order;
sentOrder->orderId = 3;
sentOrder->orderTime = DateTime::Now;
// Connect to a queue on the local computer.
MessageQueue^ myQueue = gcnew MessageQueue(".\\myQueue");
// Send the Order to the queue.
myQueue->Send(sentOrder);
}
//*************************************************
// Receives a message containing an Order.
//*************************************************
public void ReceiveMessage()
{
// Connect to the a queue on the local computer.
MessageQueue^ myQueue = gcnew MessageQueue(".\\myQueue");
// Set the formatter to indicate body contains an Order.
array
p[0] = Order::typeid;
myQueue->Formatter = gcnew XmlMessageFormatter(p);
try
{
// Receive and format the message.
Message^ myMessage = myQueue->Receive();
Order^ myOrder = static_cast
// Display message information.
Console::WriteLine("Order ID: {0}", myOrder->orderId);
Console::WriteLine("Sent: {0}", myOrder->orderTime);
}
catch (MessageQueueException^)
{
// Handle Message Queuing exceptions.
}
catch (InvalidOperationException^ e)
{
Console::WriteLine(e->Message);
}
// Catch other exceptions as necessary.
}
};
// Provides an entry point into the application.
// This example sends and receives a message from
// a queue.
int main()
{
// Create a new instance of the class.
MyNewQueue^ myNewQueue = gcnew MyNewQueue;
// Send a message to a queue.
myNewQueue->SendMessage();
// Receive a message from a queue.
myNewQueue->ReceiveMessage();
return 0;
}
```
```csharp
using System;
using System.Messaging;
namespace MyProject
{
// This class represents an object the following example sends to a queue and receives from a queue.
public class Order
{
public int orderId;
public DateTime orderTime;
};
///
/// Provides a container class for the example.
///
public class MyNewQueue
{
//**************************************************
// Provides an entry point into the application.
// // This example sends and receives a message from
// // a queue.
//**************************************************
public static void Main()
{
// Create a new instance of the class.
MyNewQueue myNewQueue = new MyNewQueue();
// Send a message to a queue.
myNewQueue.SendMessage();
// Receive a message from a queue.
myNewQueue.ReceiveMessage();
return;
}
//**************************************************
// Sends an Order to a queue.
//**************************************************
public void SendMessage()
{
// Create a new order and set values.
Order sentOrder = new Order();
sentOrder.orderId = 3;
sentOrder.orderTime = DateTime.Now;
// Connect to a queue on the local computer.
MessageQueue myQueue = new MessageQueue(".\\myQueue");
// Send the Order to the queue.
myQueue.Send(sentOrder);
}
//**************************************************
// Receives a message containing an Order.
//**************************************************
public void ReceiveMessage()
{
// Connect to the a queue on the local computer.
MessageQueue myQueue = new MessageQueue(".\\myQueue");
// Set the formatter to indicate body contains an Order.
myQueue.Formatter = new XmlMessageFormatter(new Type[]
{typeof(MyProject.Order)});
try
{
// Receive and format the message.
Message myMessage = myQueue.Receive();
Order myOrder = (Order)myMessage.Body;
// Display message information.
Console.WriteLine("Order ID: " + myOrder.orderId.ToString());
Console.WriteLine("Sent: " + myOrder.orderTime.ToString());
}
catch (MessageQueueException)
{
// Handle Message Queuing exceptions.
}
catch (InvalidOperationException e)
{
Console.WriteLine(e.Message);
}
// Catch other exceptions as necessary.
return;
}
}
}
```
```csharp
Imports System.Messaging
' This class represents an object that the following example sends to a queue and receives from a queue.
Public Class Order
Public orderId As Integer
Public orderTime As DateTime
End Class
Public Class MyNewQueue
' Provides an entry point into the application.
' This example sends and receives a message from a queue.
Public Shared Sub Main()
' Create a new instance of the class.
Dim myNewQueue As New MyNewQueue()
' Send a message to a queue.
myNewQueue.SendMessage()
' Receive a message from a queue.
myNewQueue.ReceiveMessage()
Return
End Sub
' Sends an Order to a queue.
Public Sub SendMessage()
' Create a new order and set values.
Dim sentOrder As New Order()
sentOrder.orderId = 3
sentOrder.orderTime = DateTime.Now
' Connect to a queue on the local computer.
Dim myQueue As New MessageQueue(".\myQueue")
' Send the Order to the queue.
myQueue.Send(sentOrder)
Return
End Sub
' Receives a message containing an Order.
Public Sub ReceiveMessage()
' Connect to the a queue on the local computer.
Dim myQueue As New MessageQueue(".\myQueue")
' Set the formatter to indicate the body contains an Order.
myQueue.Formatter = New XmlMessageFormatter(New Type() _
{GetType(Order)})
Try
' Receive and format the message.
Dim myMessage As Message = myQueue.Receive()
Dim myOrder As Order = CType(myMessage.Body, Order)
' Display message information.
Console.WriteLine((String.Format("Order ID: {0}", myOrder.orderId)))
Console.WriteLine((String.Format("Sent: {0}", myOrder.orderTime)))
Catch m As MessageQueueException
' Handle Message Queuing exceptions.
Catch e As InvalidOperationException
' Handle invalid serialization format.
Catch otherExceptions As Exception
' Catch other exceptions as necessary.
End Try
Return
End Sub
End Class
```
The Message Queuing technology enables applications to communicate across heterogeneous networks and systems that may be temporarily offline. This is accomplished by allowing applications to send, receive, or peek (read without removing) messages from queues. While Message Queuing is an optional component of Windows 2000 and Windows NT, it must be installed separately.
This functionality is provided through the use of the MessageQueue class, which acts as a wrapper around the underlying Message Queuing technology. Depending on the operating system you are using, there may be multiple versions of Message Queuing, and using the MessageQueue class can result in slightly different behavior.
The MessageQueue class is used to provide a reference to a Message Queuing queue. It allows you to either connect to an existing resource by specifying a path in the constructor, or create a new queue on the server. However, before you can use any of the methods such as Send(Object), Peek, or Receive, you must associate a new instance of the MessageQueue class with an existing queue.
Once you are associated with the queue, you can manipulate its properties like Category and Label. The MessageQueue class supports two types of message retrieval: synchronous and asynchronous. Synchronous methods such as Peek and Receive make the process thread wait for a specified time interval until a new message arrives in the queue. On the other hand, asynchronous methods such as BeginPeek and BeginReceive allow the main application tasks to run in a separate thread until a message arrives in the queue.
The key difference between these two types of retrieval is that synchronous methods block the calling thread while waiting for the message, whereas asynchronous methods do not. To achieve this, the asynchronous methods use callback objects and state objects to communicate information between threads. This allows the main application tasks to continue executing while waiting for the message, improving overall performance and responsiveness.
When creating a new instance of the MessageQueue class, you are not actually creating a new Message Queuing queue. Instead, you can utilize the Create(), Delete(), and Purge() methods to manage queues on the server.
The static section of the class begins with a private field:
```csharp
static
Private$
```
For information on initial property values for an instance of MessageQueue, please refer to the constructor documentation.
Constructors:
```csharp
// Initializes a new instance of the MessageQueue class. After the parameterless constructor initializes the new instance, you must set the instance's Path property before you can use the instance.
Initializes a new instance of the MessageQueue class.
// Initializes a new instance of the MessageQueue class.
Initializes a new instance of the MessageQueue class.
// Initializes a new instance of the MessageQueue class that references the Message Queuing queue at the specified path and with the specified read-access restriction.
Initializes a new instance of the MessageQueue class that references the Message Queuing queue at the specified path and with the specified read-access restriction.
// Initializes a new instance of the MessageQueue class that references the Message Queuing queue at the specified path.
Initializes a new instance of the MessageQueue class that references the Message Queuing queue at the specified path.
```
The Message Queuing (MSMQ) namespace is a set of classes in the .NET Framework that provides support for message queuing in applications using MSMQ. The namespace includes several types and properties that are used to manage and interact with message queues in various ways.
Here are some key components and their properties:
1. **Message Queuing Service Properties**: These properties provide various information about the Message Queuing service, such as the access mode for the queue, whether it accepts only authenticated messages, and the base priority used to route public queue messages over the network.
2. **Component Properties**: This class inherits from Component and has several properties that indicate whether the component can raise an event, whether the MessageQueue can be read or written to, and whether the queue category is set.
3. **IContainer Property**: This property returns an IContainer that contains the component, which allows managing resources associated with the component.
4. **Creation Time Property**: This property returns the time and date when the queue was created in Message Queuing.
5. **Default Message Property Values**: This property gets or sets the message property values to be used by default when the application sends messages to the queue.
Overall, the Message Queuing namespace provides a comprehensive set of classes and properties for managing message queues in .NET applications, making it a valuable tool for building distributed systems with reliable communication channels between different components.
以下是重构后的内容：
- 设置或获取一个值，该值指示此消息队列是否具有从消息队列中接收消息的专用访问权限。
- 获取一个值，该值指示组件当前是否处于设计模式。(继承自Component)
- 设置或获取一个值，该值指示应用程序是否维护连接缓存。
- 设置或获取一个值，该值指示队列是否仅接受非私有(非加密)消息。
- 获取附加到此组件的事件处理程序列表。(继承自Component)
- 获取消息队列在创建时由Message Queuing生成的唯一队列名称。
- 设置或获取用于将对象序列化为消息正文或从消息正文反序列化为对象的格式器。
- 获取唯一的消息队列标识符。
- 设置或获取队列描述。
- 获取队列属性最后被修改的时间。
The MessageQueue class in Microsoft Message Queuing (MSMQ) provides various properties and methods for managing a queue in a computer message store.
Here are the most important members of the MessageQueue class:
- `Path`: Gets or sets the path of the queue. Setting this property causes the MessageQueue to point to a new queue.
- `MachineName`: Gets or sets the name of the computer where the Message Queuing queue is located.
- `JournalMaxSize`: Gets or sets the maximum size of the journal queue.
- `MaxSize`: Gets or sets the maximum size of the queue.
- `ReceiveMode`: Gets or sets a value that indicates whether messages are received from other computers on the network.
- `TransactionScope`: Gets or sets a value that indicates whether messages are accepted only by transactions.
- `PeekMode`: Gets or sets a value that indicates whether messages are peeked from other computers on the network.
- `FormatType`: Gets or sets a value that indicates the format type of the messages in the queue.
- `Label`: Gets or sets the friendly name that identifies the queue.
- `NativeHandle`: Gets the native handle used to read messages from the message queue.
- `Site`: Gets or sets the ISite of the Component.
- `EnableBatchMessageInjection`: Gets or sets a value that indicates whether batched message injection is enabled for the queue.
- `EnableMulticast`: Gets or sets a value that indicates whether multicast delivery of messages is enabled for the queue.
- `EnablePersistence`: Gets or sets a value that indicates whether messages are persisted to disk even if they can be retrieved directly from the queue. This property has no effect on MSMQ servers running in Windows Server 2008 R2 Standard mode, which do not support persistence for user messaging subqueues.
- `EnqueueCount`: Gets a count of how many messages have been enqueued into this queue since it was created.
- `DequeueCount`: Gets a count of how many messages have been dequeued from this queue since it was created.
Additionally, here is an introduction to some commonly used methods in MessageQueue class:
- `Open`: Opens a previously defined Message Queuing namespace object and associates it with a Message Queuing queue object.
- `Close`: Closes the current Message Queuing namespace object and releases any resources associated with it.
- `Create`: Creates a new instance of a Message Queuing namespace object and associates it with a new Message Queuing queue object.
- `Delete`: Deletes the specified Message Queuing queue object and any associated files.
The following is the reconstructed content:
Events:
Occurs when a component is disposed by calling the Dispose() method. This event is inherited from the Component class.
Occurs when a message is read without being removed from the queue. This happens as a result of the asynchronous operation, BeginPeek().
Occurs when a message has been removed from the queue. This event is raised by the asynchronous operation, BeginReceive().
Extension Methods:
Provides various methods for working with collections, including casting elements to specific types, filtering based on type, enabling parallelization for queries, converting IEnumerable to IQueryable, and more. These methods are useful for optimizing and extending your application's functionality.
Application: This refers to the specific software or system where these events and extension methods can be used. It is not specified which application this information pertains to.
Thread Safety: Only the GetAllMessages() method is thread safe in this context. This means that multiple threads should not access this method simultaneously to avoid potential issues. Other methods may not be designed with thread safety in mind, so it is important to be aware of this when using them.
See Also: When looking for related information or resources, this section provides suggestions on where to find further details about the topics discussed in the current document.
