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RE: write response to textbox from a class.

I'm sorry, but I've read your code a couple of times and just don't see where
the Form1 is initialized. Form1 also sounds like a class name, and this
would be how you could do some form operations in vb6, but not in .Net. This
would explain why the messagebox works, as it is not instantiated, but called
statically as you did in your code.

I think you need this where your MsgBox is called:

dim ui as New Form1()
ui.txt_rec.Text = "some message for you..."
ui.Show()
"hb21l6" wrote:
>
I have created a very very simple messanger application that i'm having a
problem with.
I can send data back and forth between PC's using the TCPlistener and
TCPclient
in system.net.sock ets, which I think is very cool.

But I can't get it write the response into a textbox??

see below
if I use the standard format of assigning text to a textbox object like
this, it doesnt work.

Form1.txt_rec.T ext = "their response: " + data.ToString + vbCrLf
But, if I write out the same value to a msgbox, it works fine?
MsgBox(data)
what does happen thou, is that it sets focus on the text box, just doesnt
write the response to the box.
Anyone got any ideas?
Below is the class that tries to insert the response into the textbox.

Class TCPSrv
Shared Sub Main()

Dim server As TcpListener
server = Nothing
' Set the TcpListener on port 13000.
Dim port As Int32 = 13000
Dim localAddr As IPAddress = IPAddress.Parse ("127.0.0.1" )

server = New TcpListener(IPA ddress.Any, port)

' Start listening for client requests.

server.Start()

' Buffer for reading data
Dim bytes(1024) As Byte
Dim data As String = Nothing
' Enter the listening loop.
While True
Console.Write(" Waiting for a connection... ")

' Perform a blocking call to accept requests.
' You could also user server.AcceptSo cket() here.
Dim client As TcpClient = server.AcceptTc pClient()

' clear data value data = Nothing
' Get a stream object for reading and writing
Dim stream As NetworkStream = client.GetStrea m()

Dim i As Int32

' Loop to receive all the data sent by the client.
i = stream.Read(byt es, 0, bytes.Length)
While (i <0)
' Translate data bytes to a ASCII string.
data = System.Text.Enc oding.ASCII.Get String(bytes, 0, i)

Form1.txt_rec.T ext = data
MsgBox(data)
' Process the data sent by the client.
data = data.ToUpper()
Dim msg As Byte() =
System.Text.Enc oding.ASCII.Get Bytes(data)

' Send back a response.
stream.Write(ms g, 0, msg.Length)
i = stream.Read(byt es, 0, bytes.Length)

End While
' Shutdown and end connection
' client.Close()
End While
' once we're finished recieving - start it listening again.
' Main()
End Sub
End Class
Sep 26 '08 #1
5 2367

Thanks for the reply Mike
Form1 is already open and it calls the TCPSvr.main() function within the
class shown below.

[formname].[Textbox object].[property]
Form1.txt_rec.T ext is inside the class. so when its called, it can update
the textbox, but it isn't

thats the bit that I dont understand.

Form1.txt_rec.t ext is in the class below?

cheers
Dave


"Family Tree Mike" <Fa************ @discussions.mi crosoft.comwrot e in
message news:4D******** *************** ***********@mic rosoft.com...
I'm sorry, but I've read your code a couple of times and just don't see
where
the Form1 is initialized. Form1 also sounds like a class name, and this
would be how you could do some form operations in vb6, but not in .Net.
This
would explain why the messagebox works, as it is not instantiated, but
called
statically as you did in your code.

I think you need this where your MsgBox is called:

dim ui as New Form1()
ui.txt_rec.Text = "some message for you..."
ui.Show()
"hb21l6" wrote:
>>
I have created a very very simple messanger application that i'm having a
problem with.
I can send data back and forth between PC's using the TCPlistener and
TCPclient
in system.net.sock ets, which I think is very cool.

But I can't get it write the response into a textbox??

see below
if I use the standard format of assigning text to a textbox object like
this, it doesnt work.

Form1.txt_rec.T ext = "their response: " + data.ToString +
vbCrLf
But, if I write out the same value to a msgbox, it works fine?
MsgBox(data)
what does happen thou, is that it sets focus on the text box, just doesnt
write the response to the box.
Anyone got any ideas?
Below is the class that tries to insert the response into the textbox.

Class TCPSrv
Shared Sub Main()

Dim server As TcpListener
server = Nothing
' Set the TcpListener on port 13000.
Dim port As Int32 = 13000
Dim localAddr As IPAddress = IPAddress.Parse ("127.0.0.1" )

server = New TcpListener(IPA ddress.Any, port)

' Start listening for client requests.

server.Start()

' Buffer for reading data
Dim bytes(1024) As Byte
Dim data As String = Nothing
' Enter the listening loop.
While True
Console.Write(" Waiting for a connection... ")

' Perform a blocking call to accept requests.
' You could also user server.AcceptSo cket() here.
Dim client As TcpClient = server.AcceptTc pClient()

' clear data value data = Nothing
' Get a stream object for reading and writing
Dim stream As NetworkStream = client.GetStrea m()

Dim i As Int32

' Loop to receive all the data sent by the client.
i = stream.Read(byt es, 0, bytes.Length)
While (i <0)
' Translate data bytes to a ASCII string.
data = System.Text.Enc oding.ASCII.Get String(bytes, 0, i)

Form1.txt_rec.T ext = data
MsgBox(data)
' Process the data sent by the client.
data = data.ToUpper()
Dim msg As Byte() =
System.Text.En coding.ASCII.Ge tBytes(data)

' Send back a response.
stream.Write(ms g, 0, msg.Length)
i = stream.Read(byt es, 0, bytes.Length)

End While
' Shutdown and end connection
' client.Close()
End While
' once we're finished recieving - start it listening again.
' Main()
End Sub
End Class
Sep 26 '08 #2
Are you running TCPSvr.main() in a BackgroundWorke r? It sounds like you
should be if you are not. You then will probably need to call invoke on the
textbox to update it.

"hb21l6" wrote:
>
Thanks for the reply Mike
Form1 is already open and it calls the TCPSvr.main() function within the
class shown below.

[formname].[Textbox object].[property]
Form1.txt_rec.T ext is inside the class. so when its called, it can update
the textbox, but it isn't

thats the bit that I dont understand.

Form1.txt_rec.t ext is in the class below?

cheers
Dave


"Family Tree Mike" <Fa************ @discussions.mi crosoft.comwrot e in
message news:4D******** *************** ***********@mic rosoft.com...
I'm sorry, but I've read your code a couple of times and just don't see
where
the Form1 is initialized. Form1 also sounds like a class name, and this
would be how you could do some form operations in vb6, but not in .Net.
This
would explain why the messagebox works, as it is not instantiated, but
called
statically as you did in your code.

I think you need this where your MsgBox is called:

dim ui as New Form1()
ui.txt_rec.Text = "some message for you..."
ui.Show()
"hb21l6" wrote:
>
I have created a very very simple messanger application that i'm having a
problem with.
I can send data back and forth between PC's using the TCPlistener and
TCPclient
in system.net.sock ets, which I think is very cool.

But I can't get it write the response into a textbox??

see below
if I use the standard format of assigning text to a textbox object like
this, it doesnt work.

Form1.txt_rec.T ext = "their response: " + data.ToString +
vbCrLf
But, if I write out the same value to a msgbox, it works fine?
MsgBox(data)
what does happen thou, is that it sets focus on the text box, just doesnt
write the response to the box.
Anyone got any ideas?
Below is the class that tries to insert the response into the textbox.

Class TCPSrv
Shared Sub Main()

Dim server As TcpListener
server = Nothing
' Set the TcpListener on port 13000.
Dim port As Int32 = 13000
Dim localAddr As IPAddress = IPAddress.Parse ("127.0.0.1" )

server = New TcpListener(IPA ddress.Any, port)

' Start listening for client requests.

server.Start()

' Buffer for reading data
Dim bytes(1024) As Byte
Dim data As String = Nothing
' Enter the listening loop.
While True
Console.Write(" Waiting for a connection... ")

' Perform a blocking call to accept requests.
' You could also user server.AcceptSo cket() here.
Dim client As TcpClient = server.AcceptTc pClient()

' clear data value data = Nothing
' Get a stream object for reading and writing
Dim stream As NetworkStream = client.GetStrea m()

Dim i As Int32

' Loop to receive all the data sent by the client.
i = stream.Read(byt es, 0, bytes.Length)
While (i <0)
' Translate data bytes to a ASCII string.
data = System.Text.Enc oding.ASCII.Get String(bytes, 0, i)

Form1.txt_rec.T ext = data
MsgBox(data)
' Process the data sent by the client.
data = data.ToUpper()
Dim msg As Byte() =
System.Text.Enc oding.ASCII.Get Bytes(data)

' Send back a response.
stream.Write(ms g, 0, msg.Length)
i = stream.Read(byt es, 0, bytes.Length)

End While
' Shutdown and end connection
' client.Close()
End While
' once we're finished recieving - start it listening again.
' Main()
End Sub
End Class
Sep 26 '08 #3

Yeah, its running as a seperate thread uwing backgroundWorke r.

Do i invoke the object on the buttonClick event or in the class after its
assigned the data to it?

cheers
Dave
"Family Tree Mike" <Fa************ @discussions.mi crosoft.comwrot e in
message news:B2******** *************** ***********@mic rosoft.com...
Are you running TCPSvr.main() in a BackgroundWorke r? It sounds like you
should be if you are not. You then will probably need to call invoke on
the
textbox to update it.

"hb21l6" wrote:
>>
Thanks for the reply Mike
Form1 is already open and it calls the TCPSvr.main() function within the
class shown below.

[formname].[Textbox object].[property]
Form1.txt_rec.T ext is inside the class. so when its called, it can
update
the textbox, but it isn't

thats the bit that I dont understand.

Form1.txt_rec. text is in the class below?

cheers
Dave


"Family Tree Mike" <Fa************ @discussions.mi crosoft.comwrot e in
message news:4D******** *************** ***********@mic rosoft.com...
I'm sorry, but I've read your code a couple of times and just don't see
where
the Form1 is initialized. Form1 also sounds like a class name, and
this
would be how you could do some form operations in vb6, but not in .Net.
This
would explain why the messagebox works, as it is not instantiated, but
called
statically as you did in your code.

I think you need this where your MsgBox is called:

dim ui as New Form1()
ui.txt_rec.Text = "some message for you..."
ui.Show()
"hb21l6" wrote:
I have created a very very simple messanger application that i'm
having a
problem with.
I can send data back and forth between PC's using the TCPlistener and
TCPclient
in system.net.sock ets, which I think is very cool.

But I can't get it write the response into a textbox??

see below
if I use the standard format of assigning text to a textbox object
like
this, it doesnt work.

Form1.txt_rec.T ext = "their response: " + data.ToString +
vbCrLf
But, if I write out the same value to a msgbox, it works fine?
MsgBox(data)
what does happen thou, is that it sets focus on the text box, just
doesnt
write the response to the box.
Anyone got any ideas?
Below is the class that tries to insert the response into the textbox.

Class TCPSrv
Shared Sub Main()

Dim server As TcpListener
server = Nothing
' Set the TcpListener on port 13000.
Dim port As Int32 = 13000
Dim localAddr As IPAddress = IPAddress.Parse ("127.0.0.1" )

server = New TcpListener(IPA ddress.Any, port)

' Start listening for client requests.

server.Start()

' Buffer for reading data
Dim bytes(1024) As Byte
Dim data As String = Nothing
' Enter the listening loop.
While True
Console.Write(" Waiting for a connection... ")

' Perform a blocking call to accept requests.
' You could also user server.AcceptSo cket() here.
Dim client As TcpClient = server.AcceptTc pClient()

' clear data value data = Nothing
' Get a stream object for reading and writing
Dim stream As NetworkStream = client.GetStrea m()

Dim i As Int32

' Loop to receive all the data sent by the client.
i = stream.Read(byt es, 0, bytes.Length)
While (i <0)
' Translate data bytes to a ASCII string.
data = System.Text.Enc oding.ASCII.Get String(bytes, 0, i)

Form1.txt_rec.T ext = data
MsgBox(data)
' Process the data sent by the client.
data = data.ToUpper()
Dim msg As Byte() =
System.Text.En coding.ASCII.Ge tBytes(data)

' Send back a response.
stream.Write(ms g, 0, msg.Length)
i = stream.Read(byt es, 0, bytes.Length)

End While
' Shutdown and end connection
' client.Close()
End While
' once we're finished recieving - start it listening again.
' Main()
End Sub
End Class
Sep 27 '08 #4
it would appear that this is a common thing,

http://blogs.msdn.com/tobint/archive...Threading.aspx
I'll try to implement this, 'just like you said mike' and see if it solves
the issue.

Dave
"hb21l6" <hb****@hotmail .comwrote in message
news:86******** *************** ***********@mic rosoft.com...
>
Yeah, its running as a seperate thread uwing backgroundWorke r.

Do i invoke the object on the buttonClick event or in the class after its
assigned the data to it?

cheers
Dave
"Family Tree Mike" <Fa************ @discussions.mi crosoft.comwrot e in
message news:B2******** *************** ***********@mic rosoft.com...
>Are you running TCPSvr.main() in a BackgroundWorke r? It sounds like you
should be if you are not. You then will probably need to call invoke on
the
textbox to update it.

"hb21l6" wrote:
>>>
Thanks for the reply Mike
Form1 is already open and it calls the TCPSvr.main() function within the
class shown below.

[formname].[Textbox object].[property]
Form1.txt_rec.T ext is inside the class. so when its called, it can
update
the textbox, but it isn't

thats the bit that I dont understand.

Form1.txt_rec .text is in the class below?

cheers
Dave


"Family Tree Mike" <Fa************ @discussions.mi crosoft.comwrot e in
message news:4D******** *************** ***********@mic rosoft.com...
I'm sorry, but I've read your code a couple of times and just don't
see
where
the Form1 is initialized. Form1 also sounds like a class name, and
this
would be how you could do some form operations in vb6, but not in
.Net.
This
would explain why the messagebox works, as it is not instantiated, but
called
statically as you did in your code.

I think you need this where your MsgBox is called:

dim ui as New Form1()
ui.txt_rec.Tex t = "some message for you..."
ui.Show()
"hb21l6" wrote:
I have created a very very simple messanger application that i'm
having a
problem with.
I can send data back and forth between PC's using the TCPlistener and
TCPclient
in system.net.sock ets, which I think is very cool.

But I can't get it write the response into a textbox??

see below
if I use the standard format of assigning text to a textbox object
like
this, it doesnt work.

Form1.txt_rec.T ext = "their response: " + data.ToString +
vbCrLf
But, if I write out the same value to a msgbox, it works fine?
MsgBox(data)
what does happen thou, is that it sets focus on the text box, just
doesnt
write the response to the box.
Anyone got any ideas?
Below is the class that tries to insert the response into the
textbox.

Class TCPSrv
Shared Sub Main()

Dim server As TcpListener
server = Nothing
' Set the TcpListener on port 13000.
Dim port As Int32 = 13000
Dim localAddr As IPAddress = IPAddress.Parse ("127.0.0.1" )

server = New TcpListener(IPA ddress.Any, port)

' Start listening for client requests.

server.Start()

' Buffer for reading data
Dim bytes(1024) As Byte
Dim data As String = Nothing
' Enter the listening loop.
While True
Console.Write(" Waiting for a connection... ")

' Perform a blocking call to accept requests.
' You could also user server.AcceptSo cket() here.
Dim client As TcpClient = server.AcceptTc pClient()

' clear data value data = Nothing
' Get a stream object for reading and writing
Dim stream As NetworkStream = client.GetStrea m()

Dim i As Int32

' Loop to receive all the data sent by the client.
i = stream.Read(byt es, 0, bytes.Length)
While (i <0)
' Translate data bytes to a ASCII string.
data = System.Text.Enc oding.ASCII.Get String(bytes, 0, i)

Form1.txt_rec.T ext = data
MsgBox(data)
' Process the data sent by the client.
data = data.ToUpper()
Dim msg As Byte() =
System.Text.E ncoding.ASCII.G etBytes(data)

' Send back a response.
stream.Write(ms g, 0, msg.Length)
i = stream.Read(byt es, 0, bytes.Length)

End While
' Shutdown and end connection
' client.Close()
End While
' once we're finished recieving - start it listening again.
' Main()
End Sub
End Class


Sep 27 '08 #5
That was an interesting blog. Hopefully it gets you going.

"hb21l6" <hb****@hotmail .comwrote in message
news:A9******** *************** ***********@mic rosoft.com...
it would appear that this is a common thing,

http://blogs.msdn.com/tobint/archive...Threading.aspx
I'll try to implement this, 'just like you said mike' and see if it solves
the issue.

Dave
"hb21l6" <hb****@hotmail .comwrote in message
news:86******** *************** ***********@mic rosoft.com...
>>
Yeah, its running as a seperate thread uwing backgroundWorke r.

Do i invoke the object on the buttonClick event or in the class after its
assigned the data to it?

cheers
Dave
"Family Tree Mike" <Fa************ @discussions.mi crosoft.comwrot e in
message news:B2******** *************** ***********@mic rosoft.com...
>>Are you running TCPSvr.main() in a BackgroundWorke r? It sounds like you
should be if you are not. You then will probably need to call invoke on
the
textbox to update it.

"hb21l6" wrote:


Thanks for the reply Mike
Form1 is already open and it calls the TCPSvr.main() function within
the
class shown below.

[formname].[Textbox object].[property]
Form1.txt_rec.T ext is inside the class. so when its called, it can
update
the textbox, but it isn't

thats the bit that I dont understand.

Form1.txt_re c.text is in the class below?

cheers
Dave


"Family Tree Mike" <Fa************ @discussions.mi crosoft.comwrot e in
message news:4D******** *************** ***********@mic rosoft.com...
I'm sorry, but I've read your code a couple of times and just don't
see
where
the Form1 is initialized. Form1 also sounds like a class name, and
this
would be how you could do some form operations in vb6, but not in
.Net.
This
would explain why the messagebox works, as it is not instantiated,
but
called
statically as you did in your code.

I think you need this where your MsgBox is called:

dim ui as New Form1()
ui.txt_rec.Te xt = "some message for you..."
ui.Show()
"hb21l6" wrote:
I have created a very very simple messanger application that i'm
having a
problem with.
I can send data back and forth between PC's using the TCPlistener
and
TCPclient
in system.net.sock ets, which I think is very cool.

But I can't get it write the response into a textbox??

see below
if I use the standard format of assigning text to a textbox object
like
this, it doesnt work.

Form1.txt_rec.T ext = "their response: " + data.ToString +
vbCrLf
But, if I write out the same value to a msgbox, it works fine?
MsgBox(data)
what does happen thou, is that it sets focus on the text box, just
doesnt
write the response to the box.
Anyone got any ideas?
Below is the class that tries to insert the response into the
textbox.

Class TCPSrv
Shared Sub Main()

Dim server As TcpListener
server = Nothing
' Set the TcpListener on port 13000.
Dim port As Int32 = 13000
Dim localAddr As IPAddress =
IPAddress.Pa rse("127.0.0.1" )

server = New TcpListener(IPA ddress.Any, port)

' Start listening for client requests.

server.Start()

' Buffer for reading data
Dim bytes(1024) As Byte
Dim data As String = Nothing
' Enter the listening loop.
While True
Console.Write(" Waiting for a connection... ")

' Perform a blocking call to accept requests.
' You could also user server.AcceptSo cket() here.
Dim client As TcpClient = server.AcceptTc pClient()

' clear data value data = Nothing
' Get a stream object for reading and writing
Dim stream As NetworkStream = client.GetStrea m()

Dim i As Int32

' Loop to receive all the data sent by the client.
i = stream.Read(byt es, 0, bytes.Length)
While (i <0)
' Translate data bytes to a ASCII string.
data = System.Text.Enc oding.ASCII.Get String(bytes, 0, i)

Form1.txt_rec.T ext = data
MsgBox(data)
' Process the data sent by the client.
data = data.ToUpper()
Dim msg As Byte() =
System.Text. Encoding.ASCII. GetBytes(data)

' Send back a response.
stream.Write(ms g, 0, msg.Length)
i = stream.Read(byt es, 0, bytes.Length)

End While
' Shutdown and end connection
' client.Close()
End While
' once we're finished recieving - start it listening again.
' Main()
End Sub
End Class

Sep 27 '08 #6

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In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
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10335
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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10088
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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9169
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
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6862
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
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5668
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?

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