private Message[] PeekMessages(MessageQueue activeQueue, bool blnDynamicConnection, MessageFormat eMessageFormat, System.Type CustomType)
{
Message objMessage;
Message[] arrCurrentMessages = new Message[0];
Message[] arrCopyOfMessages = null;
IMessageFormatter objFormatter = null ;
MessagePropertyFilter objMessagePropertyFilter = new MessagePropertyFilter();
int intArrayIndex;
// Message Formatter
switch (eMessageFormat)
{
case MessageFormat.XMLSerialize:
if (CustomType == null)
{
objFormatter = new XmlMessageFormatter();
}
else
{
// objFormatter = new XmlMessageFormatter(new Type() [CustomType]);
}
break;
case MessageFormat.ActiveXSerialize:
objFormatter = new ActiveXMessageFormatter();
break;
case MessageFormat.BinarySerialize:
objFormatter = new BinaryMessageFormatter();
break;
}
// Messages in Private Queue
// Ensure these properties are received (CorrelationID defaults to False)
objMessagePropertyFilter.SetDefaults();
objMessagePropertyFilter.CorrelationId = true;
objMessagePropertyFilter.AppSpecific = true;
objMessagePropertyFilter.ArrivedTime = true;
activeQueue.MessageReadPropertyFilter = objMessagePropertyFilter;
// Message Formatter
activeQueue.Formatter = objFormatter;
// Dynamic Connection whilst gathering messages
if (blnDynamicConnection == true)
{
IEnumerator objMessageEnumerator = activeQueue.GetEnumerator();
intArrayIndex = 0;
while (objMessageEnumerator.MoveNext())
{
objMessage = (Message) objMessageEnumerator.Current;
if (intArrayIndex > 0)
{
arrCopyOfMessages = new Message[intArrayIndex];
arrCurrentMessages.CopyTo(arrCopyOfMessages,0);
arrCurrentMessages=arrCopyOfMessages;
}
arrCurrentMessages[intArrayIndex] = objMessage;
intArrayIndex += 1;
}
}
else // Snapshot of messages currently in Queue
{
arrCurrentMessages = null ;
try
{
arrCurrentMessages = activeQueue.GetAllMessages();
}
catch (System.Messaging.MessageQueueException excM)
{
throw excM;
}
}
return arrCurrentMessages;
}
/// <summary>
/// Attempts to extract the content of a message in string format.
/// </summary>
/// <param name="message">Message to extract.</param>
/// <param name="usedMessageFormatterType">Informs which formatter was used to extract the message.</param>
/// <returns>A string if successful else null.</returns>
private string ExtractMessageContent(System.Messaging.Message message)
{
string result = null;
//create an array of formatters, ordered as we are going to attempt to use them
IMessageFormatter[] formatterArray = new IMessageFormatter[3];
formatterArray[0] = new ActiveXMessageFormatter();
formatterArray[1] = new XmlMessageFormatter();
formatterArray[2] = new BinaryMessageFormatter();
//attempt to read the message body using the different formatters
foreach (IMessageFormatter formatter in formatterArray)
{
try
{
//attempt to extract the message
message.Formatter = formatter;
if (message.Formatter is ActiveXMessageFormatter)
result = Convert.ToString(message.Body);
else
{
message.BodyStream.Position=0;
StreamReader sr = new StreamReader(message.BodyStream); //do not dispose this stream else the underlying stream will close
result = sr.ReadToEnd();
}
//message has been successfully extracted (else we would have thrown an exception)
//check the xml formatter has given us valid xml
if (!(formatter is XmlMessageFormatter && !IsXml(result)))
break;
}
catch
{
result = null;
}
}
if (result == null)
result = Locale.UserMessages.UnableToDisplayBinaryMessage;
return result;
}
/// <summary>
/// Initializes a new instance of the <see cref="ActiveXMessageConverter"/> class.
/// </summary>
/// <param name="messageFormatter">The message formatter.</param>
public ActiveXMessageConverter(ActiveXMessageFormatter messageFormatter)
{
this.messageFormatter = messageFormatter;
}
/// <summary>
/// Initializes a new instance of the <see cref="ActiveXMessageConverter"/> class.
/// </summary>
public ActiveXMessageConverter()
{
messageFormatter = new ActiveXMessageFormatter();
}
private IMessageFormatter SetQueueFormatterAndProperties(MessageQueue activeQueue, eMessageFormat messageFormat, Type customType)
{
IMessageFormatter objFormatter = null;
MessagePropertyFilter objMessagePropertyFilter = new MessagePropertyFilter();
// Message Formatter
switch (messageFormat)
{
case eMessageFormat.XMLSerialize:
if (customType == null)
{
objFormatter = new XmlMessageFormatter();
}
else
{
objFormatter = new XmlMessageFormatter(new Type[] { customType });
}
break;
case eMessageFormat.ActiveXSerialize:
objFormatter = new ActiveXMessageFormatter();
break;
case eMessageFormat.BinarySerialize:
objFormatter = new BinaryMessageFormatter();
break;
}
// Messages in Private Queue
// Ensure these properties are received (CorrelationID defaults to False)
objMessagePropertyFilter.SetDefaults();
objMessagePropertyFilter.CorrelationId = true;
objMessagePropertyFilter.AppSpecific = true;
objMessagePropertyFilter.ArrivedTime = true;
activeQueue.MessageReadPropertyFilter = objMessagePropertyFilter;
// Message Formatter
activeQueue.Formatter = objFormatter;
return objFormatter;
}
public override TypeConverter.StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
{
object[] values = new object[4];
values[0] = new ActiveXMessageFormatter();
values[1] = new BinaryMessageFormatter();
values[2] = new XmlMessageFormatter();
return new TypeConverter.StandardValuesCollection(values);
}