windows forms TCP connection problem - C# Discussion Boards

14-Feb-09 12:43

Hi, I built a checkers game in C# in which players sitting next to each other can play. I am now trying to upgrade it, to become internet based. I want to generate a simple P2P connection. I wrote this code to see if a connection is established but for some reason it freezes when pressing the connection button. Please help me sort this out.
Or if you think this code is unsuitable, than please help me out with this..
here is the code

        string clientOrServer;
        Stream _stream;
        string read;
            Stream getTcpStream()
            {
            TcpClient client;
            IPEndPoint meetingPoint = new IPEndPoint(IPAddress.Parse("79.178.57.135"), 8080);
            if(clientOrServer.ToLower().StartsWith("c"))
                {
                    client = new TcpClient();
                    client.Connect(meetingPoint);
                }
                else
                {
                    TcpListener listener = new TcpListener(meetingPoint.Port);
                    listener.Start();
                    client=listener.AcceptTcpClient();
                    listener.Stop();
                }
                return client.GetStream();
            }
      
        void clientServerclick(System.Windows.Forms.PictureBox picturebox)
        {
           StreamWriter writer = new StreamWriter(_stream);
           writer.AutoFlush = true;
          if (picturebox == pictureBox89)
          {
              writer.WriteLine("{0}", pictureBox89);
          }
          if (picturebox == pictureBox51)
          {
              writer.WriteLine("{0}", pictureBox51);
          }
        }
        void readclick()
        {
            StreamReader reader = new StreamReader(_stream);
            string a = reader.ReadLine();
            Console.WriteLine(a);
        }

this is the code for client generating connection 
              clientOrServer = "c";
            _stream = getTcpStream();
            Console.WriteLine("Connected");
server
              clientOrServer = "s";
            _stream = getTcpStream();
            Console.WriteLine("Connected");
this runs when a click on a soldier occurs
 clientServerclick(pictureBox);

If this code is off, please guide me on how to accomplish this sort of thing.THANKS Big Grin | :-D

Calin Tatar14-Feb-09 13:12

Calin Tatar

14-Feb-09 13:12

try to create a worker Thread to call readclick()

Calin

bar300014-Feb-09 13:21

14-Feb-09 13:21

do I need a reader thread too then?

Calin Tatar14-Feb-09 13:26

Calin Tatar

14-Feb-09 13:26

or add the thread only for getTcpStream();

Calin

bar300015-Feb-09 4:37

15-Feb-09 4:37

can u give the line for this please.. because when i try
Thread tcp = new Thread(new ThreadStart(getTcpStream));
it gives me this error
Error 1 'System.IO.Stream WindowsFormsApplication1.Form1.TCPChatApplication.getTcpStream()' has the wrong return type

riced15-Feb-09 5:14

riced

15-Feb-09 5:14

ThreadStart() takes the name of a method that has no return type (i.e. is void) and takes no parameters.

Your getTcpStream method returns a stream.

Regards
David R

bar300015-Feb-09 22:56

instanciate a FileHelperEngine Question

15-Feb-09 22:56

Thank you very much! finaly worked it out...

Member 317070314-Feb-09 12:09

Member 3170703

14-Feb-09 12:09

I want to pass "Huntington_Positions" into the function. How do I do that. a string will not work

ProcessFiles(fileInfo.FullName,"Huntington_Positions","dbo.Huntington_Position");

private static void ProcessFiles(string strFile, ? ,string strTable)

{

<br />
             FileHelperEngine Fh1 = new FileHelperEngine(typeof(?));   <br />

bulkCopy = new SqlBulkCopy(SQLConnection);
bulkCopy.DestinationTableName = strTable;
Fh1.Options.IgnoreEmptyLines = true;

dt = Fh1.ReadFileAsDT(strFile);

try
{
bulkCopy.WriteToServer(dt);
}
catch (Exception Ex)
{
Console.WriteLine("ProcessFiles.bulkCopy: " + Ex.ToString());
}

}

--------------------------------------------------------
Its referencing a class file for the dll.

http://www.filehelpers.com/example_easy.html

Re: instanciate a FileHelperEngine Question

DaveyM6914-Feb-09 13:04

DaveyM69

14-Feb-09 13:04

I have no idea what a 'Huntingdon_Positions' is - but looking at here[^] (if this is what you're referring to, it's simply a class (SampleType in their docs).

You can't pass a class into a method, but you can pass a Type.

ProcessFiles(fileInfo.FullName, typeof(Huntington_Positions), "dbo.Huntington_Position");
private static void ProcessFiles(string strFile, Type type, string strTable)
{
    FileHelperEngine Fh1 = new FileHelperEngine(type);
    // ...
}

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

[Message Deleted]

Member 317070314-Feb-09 13:33

Member 3170703

14-Feb-09 13:33

[Message Deleted]

Re: instanciate a FileHelperEngine Question

DaveyM6914-Feb-09 22:18

DaveyM69

14-Feb-09 22:18

When posting with errors/exceptions it's helpful if you indicate which line the exception occurred on!

Anyway, you didn't change the FileHelperEngine instanciation line as I suggested previously, so I guess the error is there.

Fh1 = new FileHelperEngine(typeof(type));

now needs to be

Fh1 = new FileHelperEngine(type);

as you already have the Type in type - no need (and it won't compile) to do a typeof on it.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

Reading A Specific value From Txt File

wwwxyz14-Feb-09 8:53

wwwxyz

14-Feb-09 8:53

my t1.txt is:
1
5
18
125
.
.
.
I want to read a specific value from txt file( sample 3.value that is 18)

using System;<br />
using System.Collections.Generic;<br />
using System.IO;<br />
<br />
class Program<br />
{<br />
    static void Main()<br />
    {<br />
        const string f =(@"C:\t1.txt");<br />
<br />
        // 1<br />
        // Declare new List.<br />
        List<string> lines = new List<string>();<br />
<br />
        // 2<br />
        // Use using StreamReader for disposing.<br />
        using (StreamReader r = new StreamReader(f))<br />
        {<br />
            // 3<br />
            // Use while != null pattern for loop<br />
            string line;<br />
            while ((line = r.ReadLine()) != null)<br />
            {<br />
                // 4<br />
                // Insert logic here.<br />
                // ...<br />
                // "line" is a line in the file. Add it to our List.<br />
                lines.Add(line);<br />
            }<br />
        }<br />
<br />
        // 5<br />
        // Print out all the lines.<br />
        foreach (string s in lines)<br />
        { <br />
            Console.WriteLine(s);<br />
        }<br />
     <br />
    }<br />
}</string></string>

Wendelius14-Feb-09 9:11

Wendelius

14-Feb-09 9:11

You could try using File.ReadAllLines[^] which returns an array of data from your file.

If you want to refer to specific line (for example 3 as in your post) you would simply use ...yourvariable[2]...

The need to optimize rises from a bad design.My articles[^]

Calin Tatar14-Feb-09 9:14

Calin Tatar

14-Feb-09 9:14

this means you want to read the value from line X?
you may implement a helper method wich takes the StreamReader and returns the value contained in a file at line X. use a loop to skip the lines and count them.

Calin

Nuri Ismail14-Feb-09 9:18

Nuri Ismail

14-Feb-09 9:18

If you want a value from the specific line, you can simply count the lines and use the value from the correct one. Just like this:

string line;

int current_line = 0;
int desired_line = 3;

while ((line = r.ReadLine()) != null)
{
  current_line++;

  if(current_line == desired_line)
  { 
    lines.Add(line);
    break;
  }
}

This is just a sample logic. I hope you can use something like that for your case.

wwwxyz14-Feb-09 9:28

wwwxyz

14-Feb-09 9:28

thank you problem solved

Deresen14-Feb-09 11:01

Deresen

14-Feb-09 11:01

To comment on this post, I'd write this code a little different and smaller, like this.

It maybe is just my style, but I think it's better:

int desired_line = 3;

for(int current_line = 0, string line; (line = r.ReadLine()) != null; current_line++)
{
   if(current_line == desired_line)
   {
      lines.Add(line);
      break;
   }
}