Visual Basic

VB6 Winsock cannot receive NULL?

16-Oct-08 10:35

AllowPartiallyTrustedCallers doesn't have anything to do with what you want. It's used for code calling code, not people launching code.

Start reading: Code Access Security[^], and Code Access Security in Practice[^]

Let's see, there's also a few CP articles, like Understanding .NET Code Access Security[^] and Using MSI or a strong name to store .NET apps on a network server (Part 1)[^] and Using MSI or a Strong name to store .NET apps on a network server (Part 2)[^]

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Network enabled app

Ekjon16-Oct-08 11:01

Ekjon

16-Oct-08 11:01

Thanks so much Dave.
I started reading Mike Downen's and Shawn Farka's articles. Now I got a handful from you. Please pray for me so I don't die from over-eating.

Me

Levisvv15-Oct-08 6:37

Levisvv

15-Oct-08 6:37

I am writing an interface to a Panasonic KX-TDA telephone system using Winsock.

I can connect to the PBX and it accepts my connection properly using TCP, then I can send the initial connect string as follows:

Mtosend = Chr$(&H0) & Chr$(&H25) & Chr$(&H60) & Chr$(&H23) & Chr$(&H80) & Chr$(&H2) & Chr$(&H7) & Chr$(&H80) & Chr$(&HA1) & Chr$(&H7) & Chr$(&H6) & Chr$(&H5) & Chr$(&H2B) & Chr$(&HC) & Chr$(&H0) & Chr$(&H81) & Chr$(&H5A) & Chr$(&HBE) & Chr$(&H14) & Chr$(&H28) & Chr$(&H12) & Chr$(&H6) & Chr$(&H7) & Chr$(&H2B) & Chr$(&HC) & Chr$(&H0) & Chr$(&H82) & Chr$(&H1D) & Chr$(&H81) & Chr$(&H48) & Chr$(&HA0) & Chr$(&H7) & Chr$(&HA0) & Chr$(&H5) & Chr$(&H3) & Chr$(&H3) & Chr$(&H0) & Chr$(&H8) & Chr$(&H0)
Winsock1.SendData Mtosend

When I monitor the connection using WireShark it appears that the PBX accepts the string properly and sends a reply back, I get 51 bytes of data back, but if I read it as a string it simply shows as a "NULL" string. If I read it into a byte array, using the following code I only get zero's:

Private Sub Winsock1_DataArrival(ByVal bytesTotal As Long)
Dim DL As String
Dim DTS As String
Dim byteData(256) As Byte
Dim i As Integer

DL = CStr(bytesTotal)
DTS = ""
Winsock1.GetData byteData(), vbArray + vbByte, Val(Trim(DL))
For i = 0 To bytesTotal - 1
    DTS = DTS & " " & Right$(("00" & Hex$(byteData(i))), 2)
Next
MsgBox "TCP Rx: " & DTS & "  (bytes=" & DL & ")"
Exit Sub

But when I look at the trace in WireShark, the PBX did not send only zero's it sent a valid reply, The PBX returned string started the data with a null, but the rest was valid data. What am I doing wrong?

Please help. Confused | :confused:

Mail sending failed

Sebastian T Xavier15-Oct-08 5:19

Sebastian T Xavier

15-Oct-08 5:19

Hi all,
when I try to send a mil from my application an exception is thrown...
" Transaction failed. The server response was: sorry, the sender name and auth login doesn't coinside (#5.7.1) "
What could be the reason for this?
Thanking you in advance...

Sebastian T Xavier

Ashfield15-Oct-08 5:21

Ashfield

15-Oct-08 5:21

Sebastian T Xavier wrote:
the sender name and auth login doesn't coinside

Its telling you something here. I suspect you are not authenticated properly for the mail server.

Bob
Ashfield Consultants Ltd

Sebastian T Xavier15-Oct-08 5:29

Sebastian T Xavier

15-Oct-08 5:29

Thanks for the quick reply, actually this code segment was working for a long time. today only i got this exception.
I believe i haven't done any changes in settings

Thanks

Sebastian T Xavier

Dave Kreskowiak15-Oct-08 5:35

15-Oct-08 5:35

It's not your code that changed, it's the mail server you're using.

To increase security and prevent people from sending mail, such as spam, impersonating someone else, the server, apparently, now checks the outgoing sender name against the registered account. If they don't match, the server stops you from sending the email.

The bottom line is you are going to have to get with the people managing the mail server and find out what the requirements are. Then you're going to have to modify your code to fulfill those requirements.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Error from web service

Sebastian T Xavier15-Oct-08 5:48

Sebastian T Xavier

15-Oct-08 5:48

Thanks for the help, I will investigate on it.
Thanks once again

Error from web service

~Khatri Mitesh~15-Oct-08 4:36

~Khatri Mitesh~

15-Oct-08 4:36

Hii
I am working on SOAP Web service. when i try to call web service method then .NET throw the following error...

"Run-time exception thrown : System.Web.Services.Protocols.SoapHeaderException - The Soap request you send was invalid or malformed!"

Please suggest. How can i solve this problem.
Please suggest.
Thanks
~Khatri Mitesh

~Khatri Mitesh
khatrimitesh@hotmail.com
Bikaner (Rajasthan)
INDIA

Ashfield15-Oct-08 5:20

Ashfield

15-Oct-08 5:20

~Khatri Mitesh~ wrote:
The Soap request you send was invalid or malformed

Says it all really. Have you stepped into the code and looked at the actual values you are generating?

Bob
Ashfield Consultants Ltd

Intellisense is not displayed

sunil goyalG15-Oct-08 3:20

sunil goyalG

15-Oct-08 3:20

hi all
i use following statement for import drawing related classes
imports System.Drawing
i want to use 2D class but when i type .(after typing imports System.Drawing), then no intelligence is appeared related to 2D. Even when i Forcely type imports System.Drawing.2D, then it give error

how can i resolve this error ? Please suggest

Re: Intellisense is not displayed

EliottA15-Oct-08 3:49

EliottA

15-Oct-08 3:49

From what I see there is no System.Drawing.2D class available.

http://msdn.microsoft.com/en-us/library/system.drawing.aspx[^]

I think you want System.Drawing.Drawing2D

Thread Minimize Application

LeandroABorges15-Oct-08 2:15

15-Oct-08 2:15

Hi everyone,

I´m programming an application win forms and in some parts of my application I have a strong processing module, and I´ve decided do make a loading screen.

So, i´ve done it:

Private Sub ShowLoading()
  Dim frmBlank As New frmBlank
  frmBlank.Cursor = Cursors.WaitCursor
  frmBlank.Show()
  Dim frmLoading As New frmLoading
  frmLoading.ShowDialog()
End Sub

Private Sub StartLoadingThread()
  thread = New Threading.Thread(AddressOf ShowLoading)
  thread.Start()
End Sub

Private Sub StopLoadingThread()
  thread.Abort()
End Sub

But, the problems appear, when i abort the thread, the loading form closes, as it have to close, but the whole application minimizes.

I´m using the form in a Class Library, and it start maximized. THe whole think works as it have to work perfectly, but the problem is the application minimize.

Thanks everyone!

-----
LeandroAB

Dave Kreskowiak15-Oct-08 3:20

15-Oct-08 3:20

Why are you show the loading form on a seperate thread? From what you're describing, you wouldn't need any threading at all. Also, why is the "Loading..." form being shown as a dialog?? and I have no idea what frmBlank is for.

From your description, it should be a simple matter of creating and showing a "Loading..." form, doing your work, then destroying the "Loading..." form. Creating forms and show ing in anything other than the UI thread is not a good idea, as you've found out from your weird side-effects.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

LeandroABorges15-Oct-08 5:13

15-Oct-08 5:13

Let me try to explain more detailed my problem.

I have a very long process, and I don´t want to lock the screen without a message. So I did a loading form, that has only one label: "Loading..."

When i start the process, the form was displayed, and when the process ends, i have to close the form. Thats the reason that i habve to use a thread, because i have to continue with my process in background.

The frmBlank is only used to stay between the application and the loading form, without its the problem continues ocurring.

When i kill the thread, the forms closes automaticaly, but i´ve tried to close mannualy the form in the thread, and the problems continues ocurring.

I show the form as a dialog, to block the user access to the system during the process.

Thanks for your time.

-----
LeandroAB

Dave Kreskowiak15-Oct-08 5:28

15-Oct-08 5:28

LeandroABorges wrote:
When i start the process, the form was displayed, and when the process ends, i have to close the form. Thats the reason that i habve to use a thread, because i have to continue with my process in background.

OK. It's the long-running process that goes on the background thread, not the "Loading..." form.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

LeandroABorges15-Oct-08 5:39

15-Oct-08 5:39

But how can i show the loading form, in many different process types without making a form for each process thread?

If i show the form in the thread, the process will stop, because it´s a dialog.

If i show the form where i call the thread, the problema is the same.

How i can tell the form that the process has finished and it can close?

-----
LeandroAB

Dave Kreskowiak15-Oct-08 7:05

15-Oct-08 7:05

LeandroABorges wrote:
But how can i show the loading form, in many different process types without making a form for each process thread?

How about a Shared Sub? Call it whenever you launch a thread.

LeandroABorges wrote:
If i show the form in the thread, the process will stop, because it´s a dialog.

No, it won't. The long-running process should be in its own thread. That will NOT hang the UI thread, so it's free to redraw itself whenever needed.

LeandroABorges wrote:
If i show the form where i call the thread, the problema is the same.

No, it's not.

LeandroABorges wrote:
How i can tell the form that the process has finished and it can close?

The "Loading..." form doesn't know anything about the thread process, so it'll have to be destroyed by the form that created it when you code determines that the process is complete. You might want to look into the BackgroundWorker component to help you with this.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

LeandroABorges15-Oct-08 7:25