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Actually, it works either way. With the Send function, I think you have to call the connect function. With the SendTo function, you don't have to connect, but you do have to set the SocketOption to Broadcast. Anyway, I tried using the SendTo function and I still see the same results. Thanks for the help though.
Chase Davis
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Perhaps the problem is in the Receiving code which you have not posted?
led mike
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Well, I thought about that. However, I used a program from the customer that monitors UDP data and the same thing happens. In any case, here is the receive code:
// local member of the form
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
private void btnStart_Click(object sender, System.EventArgs e)
{
// user defined class to contain socket information
StateObject state = new StateObject();
state.workSocket = s;
EndPoint ipep = new IPEndPoint(IPAddress.Any, Convert.ToInt32(txtPortNum.Text, 10));
// only bind if it has not been bound yet
if (s.LocalEndPoint == null)
s.Bind(ipep);
s.BeginReceiveFrom(state.buffer, 0, StateObject.BufferSize, SocketFlags.None, ref ipep, new AsyncCallback(OnReceive), state);
}
void OnReceive(IAsyncResult iar)
{
StateObject state = (StateObject)iar.AsyncState;
Socket client = state.workSocket;
EndPoint epRemote = new IPEndPoint(IPAddress.Any, Convert.ToInt32(txtPortNum.Text, 10));
int bytesRead = client.EndReceiveFrom(iar, ref epRemote);
string str = Encoding.ASCII.GetString(state.buffer);
// do stuff with the string
s.BeginReceiveFrom(state.buffer, 0, StateObject.BufferSize, SocketFlags.None, ref epRemote, new AsyncCallback(OnReceive), state);
}
Chase Davis
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Chase, like I said I have had no experience with UDP so I just put together two apps, Sender and Client, they work as expected here is the code
Sender Application
public partial class Form1 : Form
{
private System.Net.Sockets.Socket _sock;
private System.Net.IPEndPoint _ipEnd;
public Form1()
{
InitializeComponent();
_sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPHostEntry hostent = Dns.Resolve(Dns.GetHostName());
_ipEnd = new IPEndPoint(hostent.AddressList[0], 3030);
}
private void button1_Click(object sender, EventArgs e)
{
byte[] bytes = Encoding.ASCII.GetBytes(textBox1.Text);
Cursor oldCursor = Cursor;
Cursor = System.Windows.Forms.Cursors.WaitCursor;
_sock.SendTo(bytes, _ipEnd);
Cursor = oldCursor;
}
}
Client application
public partial class Form1 : Form
{
UdpClient _client;
IPEndPoint _ipEndPoint;
public Form1()
{
InitializeComponent();
_ipEndPoint = new IPEndPoint(IPAddress.Any, 3030);
_client = new UdpClient(_ipEndPoint);
_client.BeginReceive(Recv, new State(_client, _ipEndPoint, this));
}
public void OnRecvMsg(string msg)
{
if( textBox1.Text.Length > 0)
textBox1.Text = String.Format("{0}\r\n{1}", textBox1.Text, msg);
else
textBox1.Text = msg;
}
public static void Recv(IAsyncResult ar)
{
State state = ar.AsyncState as State;
Byte[] bytes = state.Client.EndReceive(ar, ref state.EndPoint);
state.TForm.OnRecvMsg(Encoding.ASCII.GetString(bytes));
state.Client.BeginReceive(Recv, state);
}
}
internal class State
{
public IPEndPoint EndPoint;
public UdpClient Client;
public Form1 TForm;
internal State(UdpClient client, IPEndPoint endpoint, Form1 form)
{
EndPoint = endpoint;
Client = client;
TForm = form;
}
}
led mike
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i want to build an application which can show all files sheared on my windows os
which property is peculiar to shared files within my system and how and from where can i access the properties of my windows files
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Can you specify what means "shared files"?
led mike
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files or folders on my system that i share to enable them to be accesible say over a network
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Hi,
I am just testing some functions.
My question is how can I change the color of a LABEL, TAB texts on a form.
What I tried?
I created an xml file with the forecolor, backcolor info.
<color> <settings>
<label1>
<forecolor>> #FFFFFF
<backcolor> #FFFFFF
then I tried to link it.
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(46, 13);
this.label1.TabIndex = 0;
// this.label1.Text = "Test123";
this.label1.Text = xDoc.SelectSingleNode("Language/Settings/Label1/Text").InnerText.Trim();
this.label1.ForeColor = xDoc1.SelectSingleNode("Color/Settings/Label1/ForeColor").InnerText.Trim();
this.label1.BackColor = xDoc1.SelectSingleNode("Color/Settings/Label1/BackColor").InnerText.Trim();
and under my main class i have:
public Form1()
{
InitializeComponent();
//Load XML
xDoc1 = new XmlDocument();
xDoc1.Load(Application.StartupPath + @"\Application Data\DummyText.xml");
}
but its doesnt work like this, Summary : I want to change the color of the TEXTs on my form from an xml document. i know i need to use system.drawing.color somewhere.
modified on Monday, February 11, 2008 1:18 PM
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s3rro wrote: I want to change the color of the TEXTs on my form from an xml document. i know i need to use system.drawing.color somewhere.
So you want to create a Color object from a hexstring representation of the color, yes?
Please NOTE this is without error checking and it is NOT a design.
string scolor = "#6633aa";
int red = Convert.ToInt16(scolor.Substring(1, 2),16);
int green = Convert.ToInt16(scolor.Substring(3, 2),16);
int blue = Convert.ToInt16(scolor.Substring(5, 2),16);
label1.ForeColor = Color.FromArgb(red, green, blue);
led mike
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See ColorTranslator.FromHtml.
e.g
this.label1.ForeColor = ColorTranslator.FromHtml(xDoc1.SelectSingleNode("Color/Settings/Label1/ForeColor").InnerText.Trim());
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Sweet, had not seen that before.
led mike
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thanks man thats what i was looking for.
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Very nice. I'd forgotten about that - thanks for the reminder.
Definitely worth the 5 that's winging its way to you.
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Hi guys
I have a function called SendEmail which runs within a thread.
This function simply send an email to the user.
However, I made a "Please Wait..." page while the email gets send in the background the user see the "Please Wait..." page.
<br />
<br />
public void SendEmail()<br />
{<br />
StringBuilder messageText = new StringBuilder();<br />
<br />
messageText.AppendLine(string.Format("Name: {0} {1}", txtName.Text.Trim().ToString(), txtSurname.Text.Trim().ToString()));<br />
messageText.AppendLine(string.Format("Contact Number: {0}", txtContactNumber.Text.Trim().ToString()));<br />
messageText.AppendLine(string.Format("Email Address: {0}", txtEmail.Text.Trim().ToString()));<br />
messageText.AppendLine(string.Format("Comments: {0}\n\n", txtComments.Text.Trim().ToString()));<br />
messageText.AppendLine(string.Format("Quote Reference Nr: {0}", Request.QueryString["quoteNr"].ToString()));
<br />
}<br />
I call the SendEmail() function using the following lines of code:
<br />
Guid id = Guid.NewGuid();<br />
<br />
ThreadStart ts = new ThreadStart(SendEmail);<br />
<br />
Thread th = new Thread(ts);<br />
<br />
th.Start();<br />
<br />
Response.Redirect(string.Format("PleaseWait.aspx?ID={0}&type={1}", id, "email"));<br />
Is it true that you can't access Request data within a thread, if not, how do I then get access to Request.QueryString data?
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Ryno Burger wrote: if not, how do I then get access to Request.QueryString data?
Why are you creating threads if you don't know how to use them?
led mike
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What do you mean?
I left some code out for simplicity and readability reasons...
May I ask, why do you reply if you don't want to offer help in the first place?
Isn't that like... well... wasting your own valuable time? 
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Ryno Burger wrote: What do you mean?
I mean you don't create threads in production software if you don't have strong experience developing multi-threaded software. You clearly don't have strong experience or you wouldn't have the problem you have.
By the way the solution to your problem is to eliminate the creation of the thread, it is serving no purpose.
led mike
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This is obviously an ASP.NET question. Why not use the appropriate forum, you might get an answer faster.
only two letters away from being an asset
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Call th.Start with the Start(object Parameter) overload; pass in your Request value.
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Or just the particular querystring value would do 
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I thought we were here to help people, yes? So in this case we have helped this person create an overly complicated resource intensive implementation of sending an email, is that about it? Whatever happened to the KISS Principle[^] or Occam's razor?
led mike
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I agree that a thread is not an appropriate method with which to accomplish this task, however I would argue that the best method is not the most simple: an XMLHTTPRequest object, perhaps in a master page, could asynchronously perform the operation, allowing the user to continue browsing until informed of success. This is considerably more difficult to implement than a basic postback, which would leave the user hanging for a noticeable period of time and is thus an inferior technique in this situation.
Besides, who hasn't used threading in an overly simple case just to get some practice in? 
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Steve Westbrook wrote: however I would argue that the best method is not the most simple: an XMLHTTPRequest object, perhaps in a master page, could asynchronously perform the operation, allowing the user to continue browsing until informed of success.
Really? What happens when the user "continues browsing" to the IBM web site, how are you going to inform them that email was sent?
Steve Westbrook wrote: however I would argue that the best method is not the most simple: an XMLHTTPRequest object, perhaps in a master page, could asynchronously
I would argue that without specific use model requirements proving the usability of that, you are wrong. It's far more likely that you have been brain washed by the AJAX is going to save the world magic show. 
Anyway the OP did not indicate that:
Ryno Burger wrote: However, I made a "Please Wait..." page while the email gets send in the background the user see the "Please Wait..." page.
led mike
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I agree with you about AJAX's influence in general, and its improper use and overuse. As a friend of mine said of the fad of putting Windows Apps online, it's like trying to write Pong in assembly - I mean, you can do it, but why? As for browsing away, that is a problem to overcome; if the user closes the window or otherwise navigates away, however, one might view it as a "Cancel" request, but that's a story for another day... and another forum... and someone who cares more than me... However, I must say that avoiding a long wait time for the user is a good thing; an "e-mail sent" notif. in a corner of the window seems more appealing to me than the infamous load bar, and having worked with AJAX for longer than I ever planned I have to say it's nice seeing the screen flicker instead of vanishing for a full second every time I need to transmit e.g. a 6-character string to the server. In other words, it's ugly, it's annoying, and believe me it's full of bugs, but it's a step in the right direction.
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