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Yeah, I have never really done any UDP but I don't think it works like a Stream socket. Take a look at this article[^] which uses two UdpClient objects, one for sending and one for receiving.
led mike
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Hello,
I have a multiple instances that bind and listen to the same UDP (with same IP and Port #).
Is it possible to do that?
I set my UDP socket to REUSEADDRESS, but it seems only 1 instance receives the data. The rest are not.
Please help me,
Thanks,
nsutanto
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We are presently upgrading from .Net 2003 to 2005. We have an application that invokes an FTP client asynchronously via a process component, redirecting standard output to a log file. In .Net 2003, all of standard output is redirected to the log file, however, in .Net 2005, only the commands we are passing to the ftp client are redirected to the log file. All of the FTP responses ie: “1000 bytes transmitted in 2 seconds”, etc. are not redirected to the log file.
The relevant lines of code are as follows:
Dim myProcess As New Process
myProcess.StartInfo.FileName = "FTP.exe"
myProcess.StartInfo.UseShellExecute = False
myProcess.StartInfo.RedirectStandardOutput = True
myProcess.Start()
Dim myStreamReader As StreamReader = myProcess.StandardOutput
Dim myStreamWriter As StreamWriter = File.AppendText(“myLog.txt”)
While Not sLine Is Nothing
myStreamWriter.WriteLine(sLine)
sLine = myStreamReader.ReadLine()
End While
myProcess.WaitForExit()
Does anyone know if changes were made with regard to the redirect of standard output for process components?
Thanks in advance for your replies.
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Hi,
I have two projects in my project explorer which I would like to debug.The main project calls the other one with
Process.Start(new ProcessStartInfo(SubExe, Variables)
But when I set a breakpiont in my sub project and start the debugger I get the message
The breakpoint will not currently be hit. No symbols have been loaded for this document
I have alredy set the configuration to debug, deleted bin and obj folders with pdb and exe folders and rebuilt both projects. I would be very grateful for any suggestions
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Close all instances of VisualStudio. Goto VSWebCache folder. Empty it. Now open the solution and Rebuild.
Sometimes the cache goes out of sync.
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Thanks for the reply. But it doesn't work either 
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Perhaps it would be better to just start the process you want to debug and then use the debug process to hook into the thing you want to debug. If one of the projects you are trying to debug is a windows service, using the debug processes is a good way to debug.
Hope that helps.
Ben
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Thats a good idea. The process I want to debug is expecting argumets from the caller procedure, but I think I can work around and this will work. Many Thaks.
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It could also be that you set a breakpoint on a section of code that will never called. The debugger can figure this out when you start your app.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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I place the breakpoint on a MessageBox which is displayed when I start the application but the breakpoint itself wont be hit
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Configuration (Release) Mode?
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The way described by Ben is the solution to my problem. It works fine. Thanks for your help
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I have seen a webconfig entry for .NET Framework 3.0 where it seems to give an option of file Upload like MEMORY or STREAM to disk. I could'nt find out now immediately.
Can somebody help me out with this?
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Hello,
I have 2 instances of server.
Both instances create UDP socket listening for incoming messages.
It seems that only 1 instace of my server can listen to the messages, the other seems to see that the UDP socket is not available when it suppose to receive.
Below are portion of my code:
Socket udpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp); udpSocket.SetSocketOption(SocketOptionLevel.Socket ,SocketOptionName.ReceiveBuffer,BufferCapacity);
udpSocket.SetSocketOption(SocketOptionLevel.Socket , SocketOptionName.ReuseAddress, 1);
int servicePort = (int)transport.Properties["port"];
System.Net.IPEndPoint localEndPoint = new System.Net.IPEndPoint(System.Net.IPAddress.Any, servicePort);
IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
EndPoint tempRemoteEndPoint = (EndPoint)sender;
udpSocket.Bind(localEndPoint);
while (keepAlive)
{
fetchSignal.WaitOne();
//This call is made to yield processor resources, Remote Client doesn't
//consume 100% of the CPU.
Thread.Sleep(1);
while (keepFetching && (udpSocket.Available > 0)) //only if data is available..
{
.......
}
}
NOTE: The 2nd instance see that the udpSocket.Available is 0. While the 1st instance can see that the udpSocket is greater than 0.
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In a multithreading application I was wondering if I need to worry about 2 seperate threads overwriting each other's local variables.
In other words if 2 seperate threads called the same function at the same time would the compiled program in essence create 2 sets of local variables, one for each thread, or is there a risk that they could overwrite each others data?
Thanks for your help,
Mike
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MikeMarq wrote: if 2 seperate threads called the same function at the same time would the compiled program in essence create 2 sets of local variables, one for each thread
Yes.
For more on this, check out a discussion[^] I had with someone on the C# message board.
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Cool, thanks for the help.
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Read about synclock and monitor. They provide a mechanism that locks an object and blocks other threads from accessing it except the thread that created the lock. When the lock is released the blocked threads are allowed similar lock and access.
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I’m writing a C# DLL that executes a web browser. I have to grab a static image when the browser is done updating. So I wrote the following code.
public string SaveImageToFile()
{
int done = 0;
String file = "";
while (done < 20)
{
if (((webbrowser1.IsBusy == false) && (webbrowser1.ReadyState == WebBrowserReadyState.Complete)) || (done == 19))
{
Bitmap docImage = new Bitmap(webbrowser1.Width, webbrowser1.Height);
webbrowser1.DrawToBitmap(docImage, new Rectangle(webbrowser1.Location.X,
webbrowser1.Location.Y, webbrowser1.Width, webbrowser1.Height));
file = "C:\\Rumper\\tempA" + num + ".bmp";
docImage.Save(file, System.Drawing.Imaging.ImageFormat.Bmp);
++num;
done = 20;
}
else
{
System.Threading.Thread.Sleep(100);
Application.DoEvents();
++done;
}
}
return file;
}
However when I call SaveImageToFile from my MFC application, I get a stackoverflow. If I comment out the DoEvents. No stack overflow and no image.
I need to replace DoEvents, but I’m not sure what would be a better method.
Thanks
Programmer
Glenn Earl Graham
Austin, TX
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Is this method called from within an event handler? If so, calling DoEvents may be refiring the same event and calling your code again, and again while you are still inside of the While loop. I would suggest removing the event handler at the begining to the SaveImageToFile method, then adding the handler at the end. This can also be done within the Event handler method as well.
I have had way to many headaches for this problem to hit me again, and 99% of the time, it's because the event is being fired before your code completes.
Hope this helps,
Scott Page
"Some people spend an entire lifetime wondering if they made a difference. The Marines don't have that problem."
( President Ronald Reagan)
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No I’m not calling from an event but there are several timer procs in the main MFC software.
I have totally abandoned the DoEvent method. It causes to much strange stuff.
Now I have to keep my webbrowser control going. I need it to paint the info.
Thanks for thring to help
Programmer
Glenn Earl Graham
Austin, TX
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I'm using serialization of objects for a client-server application, these need to communicate and I want them to send and receive a message (ApiMessage) that contains a base class NetworkElement. There are several types of network elements that derive from this base class.
[serializable]
class NetworkElement
{
}
[serializable]
class NetworkElementX: NetworkElement
{
}
[serializable]
[XmlInclude(__typeof(NetworkElement))
class ApiMessage
{
NetworkElement* pNetworkElement
}
When I fill my message with a NetworkElementX and serialize an exception is thrown, the inner exception mentions that class NetworkElementX is not expected and I should use a XmlInclude arghhhh
The technology is great and works in cases when I use an ArrayList to transport objects. I shall try and encapsulate my object in an ArrayList and see if that works.
I've tried all sorts and been going around in circles for ages, if anyone has any pointers  it'd be much appreciated.
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good morning freinds,
i m designing crystal report in.net framework i.e. bundeled version.
i am preparing payslip, for that i wnt to place watermark image on page.
whn i insert picture by right clicking on the report then it is inserting my backgruound image but lines present on my report go backward & also not shown whn i run the project.
i rightclick on image & send it backward but it lines will not cum in front.
& there is no option of line to bring it forward .
please anyone tell me how should i place background image on my report.
thanks for any help in advance.
"The Difficult i can do it now...
The Impossible will take a little longer."
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hi priya
i have got complete payroll source code if you want it send mail or
IM in yahoo my yahoo id is nare700
my emails nare700@yahoo.com
nare700@gmail.com
I have read the previous posting in this forum. In it, it mentioned the use of dataset to achieve this.
I create a dataset which one of the field in the data table is base64binary.
After retrieval of the file path, open the file and store the image file as array of byte in that column.
When you bind the dataset to your report as the data source, you can easily drag and drop the image field to your report.
Conversion of image file to array of byte:
Dim fs As New System.IO.FileStream(<file path="">, IO.FileMode.Open)
Dim br As New System.IO.BinaryReader(fs)
Dim arrayByte() As Byte
arrayByte = br.ReadBytes(CInt(fs.Length))
br.Close()
fs.Close()
Hope this help!
naresh
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I think I know the answer to this, but here goes.
I have developed an app using .NET 2.0 Framework, and now have a potential customer wanting to run it on Windows NT. I have trawled the web for the last 2 nights, all leading me to the same conclusion; .NET 2.0 cannot be installed on WIn NT. Could someone please confirm or deny this for me please. 
Thanks in advance
Bit
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