Re: [Quickfix-developers] Function problem in vb.net

[cstrader <cst...@cs...>]

Thanks to all.... I understand the issue now, although I still haven't =
figured out how to deal with it!  My problem, a bit off topic I suppose, =
is that although textbox.invokerequired returns false, the textbox is =
still not written to.

chuck




  ----- Original Message -----=20
  From: Brian Erst=20
  To: cstrader ; qui...@li...=20
  Sent: Wednesday, November 15, 2006 10:23 AM
  Subject: Re: [Quickfix-developers] Function problem in vb.net


  You're probably having a threading issue. The .NET framework controls =
do not handle calls to them from other threads especially well =
(sometimes they work, other times they don't).

  I'm just guessing here, but I'd guess the onCreate call is probably =
running on your main thread (you instantiate a QF Application-derived =
object, which creates the sessions, which call the "onCreate" callback), =
while the onLogout is coming from the internal QF socket thread (this is =
an asynchronous callback). The first one works because you are in the =
"main" or "GUI" thread, while the second one fails because you are on a =
different thread.

  I'm not sure how VB.NET handles this (I'm a C# guy myself), but in the =
C# world you have to check the control's "InvokeRequired" property, and =
if true, use its "Invoke" method to create a message that gets handled =
by the GUI thread.


  A quick and dirty example:

  private delegate void SessionIDDelegate(SessionID sessionID);

  public void onLogout(SessionID sessionID)
  {
      // Are we on the main GUI thread?
      if (Form1.TextBox.InvokeRequired)
      {
         // No - call this function on the main GUI thread
         Form1.TextBox.Invoke(new SessionIDDelegate(onCreate), new =
Object[]{sessionID});
      }
      else
      {
          // We're on the main GUI thread - safe to update controls
          Console.Write("ONLOGOUT");
          Form1.TextBox.Text =3D "LOGOUT";
      }
  }

  Hope this helps.

  - Brian Erst
  Thynk Software, Inc.


  ----- Original Message ----
  From: cstrader <cst...@cs...>
  To: qui...@li...
  Sent: Wednesday, November 15, 2006 8:21:13 AM
  Subject: [Quickfix-developers] Function problem in vb.net


  QuickFIX Documentation: =
http://www.quickfixengine.org/quickfix/doc/html/index.html
  QuickFIX Support: http://www.quickfixengine.org/services.html


  I have a weird problem in vb.net 2005 that is causing me major =
headaches.   The problem is that some commands given within quickfix =
functions do not execute.

  For instance,

  This sub writes to both the console and the textbox:
  Public Sub onCreate(ByVal sessionID As QuickFix.SessionID) Implements =
QuickFix.Application.onCreate

      Console.write("ONCREATE")

      Form1.TextBox1.Text =3D "ONCREATE"

  End Sub

  But although this sub writes to the console, it does NOT write to =
form1.textbox1!!!



  Public Sub onLogout(ByVal sessionID As QuickFix.SessionID) Implements =
QuickFix.Application.onLogout=20

      Console.write("ONLOGOUT")

      Form1.TextBox1.Text =3D "LOGOUT"

  End Sub

  Also, the ToApp sub is OK in this regard, but the FromApp sub does not =
print to the textbox either???

  thanks!



  chuck





    ----- Original Message -----=20
    From: John Haldi=20
    To: cstrader=20
    Sent: Wednesday, October 25, 2006 9:26 AM
    Subject: RE: Any luck?


    Its very common for NetAdmins to disable pinging from external IPs.  =
But you need to get the broker's IT guy on the phone and explain that =
you're trying to connect to their FIX engine and see if he can determine =
whether there are any permission issues preventing you from connecting.



-------------------------------------------------------------------------=
---
    From: cstrader [mailto:cst...@cs...]=20
    Sent: Wednesday, October 25, 2006 10:12 AM
    To: John Haldi
    Subject: Re: Any luck?


    No...but thanks for asking.

    If I can't ping the ip address my broker has given me, and there is =
no reason that I can think of on my end, what do you think that means?


      ----- Original Message -----=20
      From: John Haldi=20
      To: cstrader=20
      Sent: Wednesday, October 25, 2006 10:01 AM
      Subject: Any luck?




      --------------------------------------
      John Haldi
      Allagash Trading, LLC
      120 Broadway, 20th Floor
      New York, NY 10271
      212.433.3958
      jo...@al...

  =
-------------------------------------------------------------------------=

  Take Surveys. Earn Cash. Influence the Future of IT
  Join SourceForge.net's Techsay panel and you'll get the chance to =
share your
  opinions on IT & business topics through brief surveys - and earn cash
  =
http://www.techsay.com/default.php?page=3Djoin.php&p=3Dsourceforge&CID=3D=
DEVDEV
  _______________________________________________
  Quickfix-developers mailing list
  Qui...@li...
  https://lists.sourceforge.net/lists/listinfo/quickfix-developers