|
Hi all. I'm a bit new to threads and I'm having a rather strange problem.
I'll post a snippet of code here just to help explain what I mean.
/* BEGIN CODE */
Thread generateStart = new Thread(new ThreadStart(gen.generateLevel1IP));
generateStart.Start();
pDlg.Show();
while (generateStart.ThreadState == ThreadState.Running)
{
pDlg.labelThread.Text = generateStart.ThreadState.ToString();
pDlg.Update();
}
pDlg.finishUp();
/* END CODE */
pDlg is a System.Windows.Forms.Form derived class, and gen is just a class I've created (that makes use of the pDlg form). Here's the problem - I'm getting VERY inconsistent results.
On some occassions, the pDlg form appears locked - I can't move the window arround. None of the fields are being updated. I have to force the program to quit.
On other occassions, the pDlg.finishUp() function is called, even though the thread is still running! I can tell this because other fields in pDlg are being updated by the thread after the pDlg.finishUp() function has finished execution.
Interestingly, if I stick a MessageBox.Show() call in the middle of the while loop, it *ALWAYS* executes pDlg.finishUp() BEFORE the thread has completed.
Any help would be appreciated. I have no idea what's going on.
- Sabran
|
|
|
|
|
ThreadState is a set of flags, so you need to check for
(generateStart.ThreadState & ThreadState.Running) == TheadState.Running
HTH,
James
Simplicity Rules!
|
|
|
|
|
Oh, all right. Thanks. How then would I check for multiple flags set? Like, if I wanted to check if it were Running and Suspended (not that this is useful, but I'd like to know just for learning's sake.
Would it be:
(generateStart.ThreadState & ThreadState.Running & ThreadState.Suspended) == (ThreadState.Running & ThreadState.Suspended))
Is that right? Or is there an easier way?
- Sabran
|
|
|
|
|
(generateStart.ThreadState & (ThreadState.Running | ThreadState.Suspended) == ( ThreadState.Running | ThreadState.Suspended)
If you want to check whether either flag is set either split it up into 2 checks, or just see if the result is greater than zero.
You can do the same with a single check as well (generateStart.ThreadState & ThreadState.Running) > 0.
I didn't mention that earlier because my head was thinking that you couldn't compare an enum in that way, you of course can compare them that way.
James
Simplicity Rules!
|
|
|
|
|
Ok. This is making a bit more sense to me now. It's just like any other bitwise comparison. What I'm confused about is this:
If the state of the Thread is *just* running, then checking if
generateStart.ThreadState == ThreadState.Running
should yield true, right? It's only the case where there's the possibility of the ThreadState having more than one flag set where I must do a bitwise AND comparison of the two, to ensure that at least one of those flags is the "Running" flag.
Isn't this the way it works? Or am I just losing my mind?
- Sabran
|
|
|
|
|
hi
is it possible to change the cell color of a datagrid depending on the values of the cell. like ....suppose i have the datagrid control binded to a table which has profit and loss values. now if it is profit i want to change the cell color to green and red for loss.
please help
prash
|
|
|
|
|
Create a new DataGridColumnStyle and override the Paint methods in it.
James
Simplicity Rules!
|
|
|
|
|
Am I right in thinking I need to derive a class from IDictionary to write a map class ? Does anyone know of any examples ?
Christian
The tragedy of cyberspace - that so much can travel so far, and yet mean so little.
And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002
|
|
|
|
|
Correct, If Hashtable doesn't work for you. There is also DictionaryBase and DictionaryEntry to help you along.
Glad to see your still with us, How did the display resolution change work on your machine? 
Regards
|
|
|
|
|
Yes you can derive from IDictionary to write your own map class. However, if you're looking for a simple map class, then the Hashtable class is probably what you need:
Hashtable table = new Hashtable();
table.Add(1, "Chris Maunder");
table.Add(6422, "Christian Graus");
table.Add(232, "Tom Archer");
foreach (DictionaryEntry entry in table)
{
Console.WriteLine("CodeProject ID {0} = {1}",
entry.Key, entry.Value);
}
Cheers,
Tom Archer
Author, Inside C#
Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.
|
|
|
|
|
hi
i have a MdiForm which loads a child form on startup and displays the form to the right side. now when i resize the Mdi Form. i want the child form to maintain its right most position to the mdiform.
whatis happening is as soon as i am resizing the right border of the mdiform.....the child form remain in the current position and hence is not right aligned.
the right property of the form is read only....
how do i come to know how much i need to shift the child form to the right or left of the mdi form...depending on the resize?????
please help?
prash
|
|
|
|
|
In your resize code
childForm.Left = Width - childForm.Width;
This can be computed easily with basic algebra when you know that childForm.Right = childForm.Left + childForm.Width
James
Simplicity Rules!
|
|
|
|
|
Hi,
I've been toying with "web services" lately in both C# and VB6. However, I'm wondering. When I create a web service with C# and I expose my methods as web methods I'm wondering where my methods are runninig ???
I don't see the class in Component Services(MTS) or anywhere. Am I missing something here? Wheres my middle tier ?
Thks in advance ..
Dato ..
|
|
|
|
|
In a .NET XML Web Service the code is running under the context of ASP.NET.
HTH,
James
Simplicity Rules!
|
|
|
|
|
Hello,
can i draw a chart with C# in a way other than the draw line and draw rectangle code???does the C# has classes that helps in drawing charts.
thanx
|
|
|
|
|
Don't think there is anything to help you with chart drawing, except textured brushes.
James
Simplicity Rules!
|
|
|
|
|
You might want to see if there is some way that you can instantiate an Excel object, this can be done very easily in other languages and could give you access to quite a lot of power as far as charting goes.
Nick Parker
|
|
|
|
|
I want to develop an asp.net application but I cannot connect to localhost.Is there any posibility that i connect to a server without having IIS running in background?
|
|
|
|
|
By definition you need a Web server in order to use localhost. Therefore, the answer is "no".
Cheers,
Tom Archer
Author, Inside C#
Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.
|
|
|
|
|
|
You're welcome.
Cheers,
Tom Archer
Author, Inside C#
Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.
|
|
|
|
|
Take a look at the following c# code and test it:
using System;
using System.IO;
using System.Net;
using System.Text;
namespace csharp_station.howto
{
///
/// Fetches a Web Page
///
class WebFetch
{
static void Main(string[] args)
{
byte[] buf = new byte[8192];
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http:\\www.csharp-station.com");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream resStream = response.GetResponseStream();
int count = resStream.Read(buf, 0, buf.Length);
Console.WriteLine(Encoding.ASCII.GetString(buf, 0, buf.Length));
resStream.Close();
}
}
}
I expected that the output to be the entire content of Html page that i have requested , but unfortunetlly it returns only little pieces of the Html code.
I would be thankfull to anyone who helps me to fix this
problem
|
|
|
|
|
I'm not sure I understand your problem. When I run it I get the 8k of info you requested.
Cheers,
Tom Archer
Author, Inside C#
Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.
|
|
|
|
|
Please request 100k instead of 8K
and then look at the structure of that Html(it's chonk)
Thank you
|
|
|
|
|
Try this instead...
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http:\\www.csharp-station.com");
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream resStream = response.GetResponseStream();
byte[] buf = new byte[1000];
while (true)
{
int bytesRead = resStream.Read(buf, 0, buf.Length);
if (bytesRead == 0)
break;
Console.WriteLine(Encoding.ASCII.GetString(buf, 0, bytesRead));
}
resStream.Close();
Console.ReadLine();
Cheers,
Tom Archer
Author, Inside C#
Please note that the opinions expressed in this correspondence do not necessarily reflect the views of the author.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
