I just started to learn C# (my background is in C++), and right now I
study the sockets, TCP/IP etc... so, I found a usefull source code at: http://www.codeguru.com/Csharp/Cshar...cle.php/c8781/.
But there is a scenarion that throw a strange exception. So, the client
is connected to the server, I send a message from client to server and
viceversa and than I stop the server from the 'x' button from the right-up
corner; in that moment the client throw System.NullRefe renceException:
An unhandled exception of type 'System.NullRef erenceException ' occurred
in system.dll
Additional information: Object reference not set to an instance of an
object.
the cursor is placed here:
000000a0 0F B6 F0 movzx esi,al
and the Call Stack stopped here:
system.dll!Syst em.Net.Sockets. OverlappedAsync Result.Completi onPortCallback( uint
errorCode = 64, uint numBytes = 0, System.Threadin g.NativeOverlap ped*
nativeOverlappe d = 1750608) + 0xa0 bytes
There is a solution?
Thank you in advance.
..:Alex:. 3  3657 
Hi,
What escenrio?
What is the code you were executing when this exception is thrown
That exception happen when you are access a variable that is null
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"Alex J." <al*******@yaho o.com> wrote in message
news:%2******** ********@TK2MSF TNGP15.phx.gbl. .. I just started to learn C# (my background is in C++), and right now I
study the sockets, TCP/IP etc... so, I found a usefull source code at:
http://www.codeguru.com/Csharp/Cshar...cle.php/c8781/.
But there is a scenarion that throw a strange exception. So, the
client is connected to the server, I send a message from client to server
and viceversa and than I stop the server from the 'x' button from the
right-up corner; in that moment the client throw
System.NullRefe renceException:
An unhandled exception of type 'System.NullRef erenceException ' occurred
in system.dll
Additional information: Object reference not set to an instance of an
object.
the cursor is placed here:
000000a0 0F B6 F0 movzx esi,al
and the Call Stack stopped here:
system.dll!Syst em.Net.Sockets. OverlappedAsync Result.Completi onPortCallback( uint
errorCode = 64, uint numBytes = 0, System.Threadin g.NativeOverlap ped*
nativeOverlappe d = 1750608) + 0xa0 bytes
There is a solution?
Thank you in advance.
.:Alex:.
Hi,
I don't know if you took a look at the source code from this url: http://www.codeguru.com/Csharp/Cshar...cle.php/c8781/
Try to make 2 projects from these files a client and a server. 'Start
Listen' the server and then connect the client to the server. Kill the
server from procesess (task manager).
You will se how the client throw the exeption in subject:
System.NullRefe renceException
Let me know if you understand me.
Thank you for your attention.
..:Alex:.
"Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us > wrote
in message news:OS******** ******@tk2msftn gp13.phx.gbl... Hi,
What escenrio?
What is the code you were executing when this exception is thrown
That exception happen when you are access a variable that is null
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"Alex J." <al*******@yaho o.com> wrote in message
news:%2******** ********@TK2MSF TNGP15.phx.gbl. .. I just started to learn C# (my background is in C++), and right now I
study the sockets, TCP/IP etc... so, I found a usefull source code at:
http://www.codeguru.com/Csharp/Cshar...cle.php/c8781/.
But there is a scenarion that throw a strange exception. So, the
client is connected to the server, I send a message from client to server
and viceversa and than I stop the server from the 'x' button from the
right-up corner; in that moment the client throw
System.NullRefe renceException:
An unhandled exception of type 'System.NullRef erenceException '
occurred in system.dll
Additional information: Object reference not set to an instance of an
object.
the cursor is placed here:
000000a0 0F B6 F0 movzx esi,al
and the Call Stack stopped here:
system.dll!Syst em.Net.Sockets. OverlappedAsync Result.Completi onPortCallback( uint
errorCode = 64, uint numBytes = 0, System.Threadin g.NativeOverlap ped*
nativeOverlappe d = 1750608) + 0xa0 bytes
There is a solution?
Thank you in advance.
.:Alex:.
> That exception happen when you are access a variable that is null
ok, d'accord :), but where exactly it happens in that code?
Do you have a ideea?
"Ignacio Machin ( .NET/ C# MVP )" <ignacio.mach in AT dot.state.fl.us > wrote
in message news:OS******** ******@tk2msftn gp13.phx.gbl... Hi,
What escenrio?
What is the code you were executing when this exception is thrown
That exception happen when you are access a variable that is null
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
"Alex J." <al*******@yaho o.com> wrote in message
news:%2******** ********@TK2MSF TNGP15.phx.gbl. .. I just started to learn C# (my background is in C++), and right now I
study the sockets, TCP/IP etc... so, I found a usefull source code at:
http://www.codeguru.com/Csharp/Cshar...cle.php/c8781/.
But there is a scenarion that throw a strange exception. So, the
client is connected to the server, I send a message from client to server
and viceversa and than I stop the server from the 'x' button from the
right-up corner; in that moment the client throw
System.NullRefe renceException:
An unhandled exception of type 'System.NullRef erenceException '
occurred in system.dll
Additional information: Object reference not set to an instance of an
object.
the cursor is placed here:
000000a0 0F B6 F0 movzx esi,al
and the Call Stack stopped here:
system.dll!Syst em.Net.Sockets. OverlappedAsync Result.Completi onPortCallback( uint
errorCode = 64, uint numBytes = 0, System.Threadin g.NativeOverlap ped*
nativeOverlappe d = 1750608) + 0xa0 bytes
There is a solution?
Thank you in advance.
.:Alex:.
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