Question

VB.NET Issues developing application utilizing Dial-Up

Asked by: CipherIS

Developing an application that is utilizing serial communication (TAPI).  I am using PortCtroller.NEt (http://www.scientificcomponent.com/).  I am passing messages between the client and server so I know where I am in the transfer process.  I send "GoAhead" from the client to the server to start and there are no issues.  Later during the process I send "GoGet" from the client to the server.  The problem is that the server is not receiving "GoGet".  Instead it is receiving :

"GoG"
"et"

Any idea how to resolve this?

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Asked On
2009-07-28 at 20:03:45ID24608339
Tags

Visual Studio 2005

Topics

IP Telephony

,

Microsoft Visual C#.Net

,

Microsoft Visual Basic.Net

,

.NET

Participating Experts
2
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0
Comments
8

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Answers

 

by: logic_chopperPosted on 2009-07-31 at 17:10:45ID: 24993448

So are you saying that you are using the OnDataReceived event and that it is being called twice, once with "GoG" and then next with "et"?  I'm not very familiar with this library however what looks like is happening is that there is no "packetization" support at the level you are using the library.  So for example, what you would want is that you receive an event when an entire packet is received, e.g. GoAhead or GoGet.  What I suggest is that you append a special character to your commands, like ";" and then use the OnEventCharReceived event which will enable you to read the entire packet in one go.  So you would set enablereadoneventchar to true and eventchar to ; and then send GoGet; and GoAhead; to the server.  When the server receives a ; the OnEventCharReceived event would be called.

 

by: CodeCruiserPosted on 2009-08-03 at 03:15:13ID: 25003043

Would you be able to show some code? Especially where you are sending the two words.

 

by: CipherISPosted on 2009-08-03 at 09:07:10ID: 25005707

Here is the write Statement:
 
PortController1.Write("GoGet")
 
*************************************
 
Here is the read
 
Dim readbuffer As String = ""
readbuffer = PortController1.Read
If readbuffer.Trim = "GoGet" Then
...
End If
                                              
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by: CodeCruiserPosted on 2009-08-03 at 09:10:45ID: 25005754

Also the code that sends and receives the "GoAhead". I just want to see if there is any difference in the code.

 

by: CipherISPosted on 2009-08-05 at 22:17:38ID: 25030277

I resolved it.  Had to use the StringBuilder and I was able to find the value there.

 

by: CodeCruiserPosted on 2009-08-06 at 00:55:54ID: 25030963

How did you use the stringbuilder?

20120131-EE-VQP-002

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