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| Setting the message id in a VB.NET application |
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| jefflowrey |
 Posted: Fri Jun 24, 2005 3:16 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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| PeterPotkay wrote: |
| Still wonder if Unicode is so great, why isn't everything using it? Or is that the direction apps are slowly going to? WB-IMB uses Unicode internally, correct? UTF-8, or UTF16? |
It's the direction everything is going, but slowly. WBIMB does use unicode "internally", and I forget which one. I'm sure the manuals say ... 
_________________
I am *not* the model of the modern major general. |
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| jigjim |
| Posted: Wed Jun 29, 2005 12:35 pm Post subject: |
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Apprentice
Joined: 30 Mar 2004
Posts: 41
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Hi,
I do the setting of message ID the follwoing way in my code.
| Code: |
msg = new MQMessage();
msg.MessageType = MQC.MQMT_REQUEST;
msg.Format = MQC.MQFMT_IMS_VAR_STRING;
msg.Persistence = MQC.MQPER_NOT_PERSISTENT;
msg.Encoding = 17;
msg.CharacterSet = 37;
Random rnd = new Random();
Byte[] b = new Byte[10];
rnd.NextBytes(b);
msg.MessageId = b;
msg.ReplyToQueueName = replyQ;
MQPutMessageOptions pmo = new MQPutMessageOptions();
string data = "CMDMASK " + cmd;
short LL = (short)(data.Length + 4);
short ZZ =0;
byte[] tab= new byte[2];
tab[0]=(byte)((LL&0xFF00)>>8);
tab[0+1]=(byte)(LL&0x00FF);
// Build the IMS Meesage
msg.WriteBytes(tab);
msg.WriteInt16(ZZ);
msg.WriteString(data);
q.Put(msg, pmo);
q.Close();
mgr.Disconnect();
retMsg = getIMS(b);
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The Return Message is picked up as:
| Code: |
MQGetMessageOptions gmo = new MQGetMessageOptions();
gmo.Options = MQC.MQGMO_WAIT;
gmo.WaitInterval = 10;
qmsg = new MQMessage();
qmsg.CorrelationId = id; // Where id = b "getIMS(b)" from the Put method
q.Get(qmsg, gmo);
retMsg = qmsg.ReadString(qmsg.MessageLength);
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For my .NET application (running from Windows box as a batch process, windows service the above code works fine.
But die to some recent enhancements needed, I tried to use this code in my ASP.NET Web App. I have the following problems:
1. The user id it picks us by default is ASPNET. need to know how can we override it.
2. The Message ID shows up as garbled in the Co-Relation ID field of the reply message. Due to this it is unable to pick the Reply message from the Q and throws a 2033.
Can somebody help me in:
1. Fix the above errors ?
2. How to collect the Message ID (automatically populated by the API) after the PUT is done. I can then set this as Co Relation id of my reply message and read the message from the Reply Q
Thanks
Jigs |
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| JohnGee |
| Posted: Tue Jul 12, 2005 8:23 am Post subject: |
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Newbie
Joined: 07 Apr 2005
Posts: 8
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Here is something I've found that can convert the message & correlation id byte arrays to string and then back to byte arrays without any ASCII conversion issues:
Imports Microsoft.VisualBasic '--for AscW function
Private Function byte2String(ByVal input() As Byte) As String
Dim charHelper(23) As Char
Dim returnStr As String
'--copy the byte array to the char array
input.CopyTo(charHelper, 0)
'--put the char array to the string
For Each singleton As Char In charHelper
returnStr = returnStr + singleton.ToString
Next
Return returnStr
End Function
Private Function string2Byte(ByVal input As String) As Byte()
Dim charHelper(23) As Char
Dim byteArray(23) As Byte
'--copy the string into the char array
charHelper = input.ToCharArray
'--copy the char array to the byte array
For idx As Integer = 0 To 23
byteArray(idx) = AscW(charHelper(idx))
Next
Return byteArray
End Function |
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| fjb_saper |
| Posted: Tue Jul 12, 2005 1:32 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Make sure you do not expect a String representation of the byte array:
like "this is my byte array"
There are a few fundamentals about byte arrays.
There is no indication as to what char representation is acceptable for a byte value outside of char values.
Ex in C hex 00 will terminate the string....
The only way to correctly represent a byte array is to display the hex value of each byte:
Assuming that your platform is ascii:
String "01" ==> byte array ==> hex representation "0x3031"
Enjoy  |
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| klamerus |
| Posted: Sat Jul 16, 2005 5:32 pm Post subject: |
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Disciple
Joined: 05 Jul 2004
Posts: 199
Location: Detroit, MI
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Well UNICODE is pretty darn useful, but you're asking a question about a product from a company that still calls hard drives DASD; believes that EBCDIC is the answer to everything; and thinks that a good way to specify a server to the MQ API is via an environment variable.
Ours is not to wonder way...except in open forums like this  |
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