WebBrowser + Threads help, please! i dunno what to do anymore... - C# Discussion Boards

Re: File Properties

engsrini9-Jul-06 22:06

engsrini

9-Jul-06 22:06

Luk @
FileInfo Class of
System.IO Namespace

tabControl problem in VS studio 2005

Kim06189-Jul-06 18:22

Kim0618

9-Jul-06 18:22

Hi,

I encountered a problem in using tab control in VS studio 2005.
If I set the tab control "Alignment" property to "Left" or "Bottom",
so that the tab page strip appear on the left or bottom of the pages, the problems arised. For "Left" alignment, the text on the tab strip didn't show up. For "Bottom" alignment, the tab strip appearance look strange. How can I solve it ?

Thanks

Re: tabControl problem in VS studio 2005

LongRange.Shooter10-Jul-06 4:17

LongRange.Shooter

10-Jul-06 4:17

I would recommend posting this on the Microsoft forums so that it has a chance to get back to the developers.

Ho to Programming for Yahoo messenger ?

hdv2129-Jul-06 13:21

hdv212

9-Jul-06 13:21

hi i want to know how to write programs fo yahoo (like booters or antibooters or ...) in c#.net ..
Please give a resource for tools and tutorials .. thanks ,,

Re: Ho to Programming for Yahoo messenger ?

stancrm9-Jul-06 20:11

stancrm

9-Jul-06 20:11

I have only a link for Yahoo Messenger SDK in C++.
http://developer.yahoo.com/messenger/

You must use DllImport to use it.

multi row select

p_rajanikanth9-Jul-06 13:17

p_rajanikanth

9-Jul-06 13:17

Hi friends
i've dataviewgrid with data from sql server db. our select can multi select on the grid.
my question is ,users may sometime forget to hold Ctrl key and they loose all previous selections. and they have to redo all those selections again.
am just wondering is it possible to have checkbox for selection (like in listbox) in grid ?
Thanks for ur ideas

Cheers

Re: multi row select

Vipin Venugopal9-Jul-06 18:08

Vipin Venugopal

9-Jul-06 18:08

Why not!!! Just like list box u can have check box also in ur grid. u can add check box to the item template of the grid. and at the end of the grid give a submit button so that u can do the rest of the process with the selected items.

Vipin

WebBrowser + Threads help, please! i dunno what to do anymore...

yoni10009-Jul-06 12:34

yoni1000

9-Jul-06 12:34

hey, i'm writing an application which uses a WebBrowser control to navigate a database of sites and do stuff with it.
i know i better use http request but i can't for the specific thing i wanna do.

anyway, my architure is:
WindowForm which creates a single thread, and the thread creates few threads which do all the work.

My problem is, that after an unspecific time, the application hangs... i have no idea why, i've created a message pump inside the small thread with the webbrowser and all threads hang at "DispatchMessage" while teh main thread hangs at m_Smallthread.Start();

This is the code for the main thread:

{
// Fill first the list.
m_lvListView.Invoke(UpdateTheListView, m_dsMyURLs);

// No threads are running.
m_nCurrThreadsRunning = 0;

// This goes over sites.
int nSiteCounter = 0;

// Go over sites
while (nSiteCounter < m_dsMyURLs.Tables[0].Rows.Count)
{
// Check the curr thread num, that is no longer than max boz
if (m_nCurrThreadsRunning < m_nMaxNumberOfThreadsBoz)
{
// Create wanted manual event.
m_StopChildThreads = new ManualResetEvent(false);
m_eSmallThreadStopped = new ManualResetEvent(false);

// Gets real url.
string url;
if (m_dsMyURLs.Tables[0].Rows[nSiteCounter].ItemArray[2].ToString() != "")
{
// Add site name
url = m_dsMyURLs.Tables[0].Rows[nSiteCounter].ItemArray[2].ToString();
}
else
{
// Add site name
url = m_dsMyURLs.Tables[0].Rows[nSiteCounter].ItemArray[1].ToString();
}
try
{
// Create new single getter.
SingleSiteGetter sgSingleGetter =
new SingleSiteGetter(url,
nSiteCounter, EndSingleThreadFunc, m_lvListView,
m_uaArguments, m_StopChildThreads, m_eSmallThreadStopped,
m_nSecsToNavigateWait, m_bDoChilds, ref m_bIsDoEventsLocked);

// Create the thread.
Thread trSingleGetThread = new Thread(sgSingleGetter.StartSmallThread);
trSingleGetThread.Name = "SmallBrowserThread number " + nSiteCounter.ToString();

// Specify it as STA
trSingleGetThread.SetApartmentState(ApartmentState.STA);

Interlocked.Increment(ref m_nCurrThreadsRunning);

// Lock thread, and add it.
Monitor.Enter(m_hThreads);
m_hThreads.Add(m_StopChildThreads, trSingleGetThread);
Monitor.Exit(m_hThreads);

trSingleGetThread.Start();

++nSiteCounter;
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}

}
else
{
// Continue if all ok.
Thread.Sleep(300);
}

// Check for canceling
if (ClosureThreadFunc())
{
return;
}
}

// Check that all small threads are done.
while (m_hThreads.Count > 0)
{
// Continue if all ok.
//Application.DoEvents();
Thread.Sleep(500);

// Check for canceling.
if (ClosureThreadFunc())
{
return;
}
}

// Make asynchronous call to main form
// to inform it that thread finished
m_frmPirsumon.Invoke(m_frmPirsumon.m_delegateThreadFinishedEvent, null);
}

* In the above code, we always check if number of threads is not at maximum allowed.

this is the code for small thread:
************************
// Says that its initilizing.
m_lvListView.Invoke(SingleUpdatingProc, m_nSiteIndex, "Starting...", ListViewColums.STATUS);

// Init the web browser (new webbrowser + events).
InitilizeWebBrowser();

// Handle navigation.
int nNavigateResult = Navigate(m_strUrl);
*********

**** This navigates into site: *********
private int Navigate(string strSite)
{
int nResult = ALL_OK;

// Navigate to the wanted url.
m_wbMyBrowser.Navigate(strSite);
DateTime dtNavigatePressTime = DateTime.Now;
m_lvListView.Invoke(SingleUpdatingProc, m_nSiteIndex, "Surfing...", ListViewColums.STATUS);

// Wait till the navigate is completed.
while (nResult == ALL_OK &&
m_wbMyBrowser.ReadyState != WebBrowserReadyState.Complete)
{
// Get how much time passed sience navigation.
TimeSpan tTimeSpent = DateTime.Now.Subtract(dtNavigatePressTime);

// check if time expired.
if (tTimeSpent.TotalSeconds >= m_nSecsToWait)
{
// Stop browser.
// m_wbMyBrowser.Stop();

// Update list
m_lvListView.Invoke(SingleUpdatingProc, m_nSiteIndex, "Error", ListViewColums.STATUS);
m_lvListView.Invoke(SingleUpdatingProc, m_nSiteIndex, "Site did not respond after specified time.", ListViewColums.COMMENTS);
nResult = TIME_ELAPSED;
}

// Check stop event.
else if (m_rsStopIt.WaitOne(0, true))
{
// Stop browser.!
// m_wbMyBrowser.Stop();

m_rSmallIsStoppedNow.Set();

nResult = STOP_PRESSED;
}
else
{
// Handle events.
DoEventsSux();

Thread.Sleep(50);
}
}

return (nResult);

}
My while is checking the state of browser, if time exceeds or stop pressed, it stops it. otherwise, it pumps messages.
my DoEventsSux is a simple peek -> get -> translate -> dispatch that i took from "user32.dll"

thats it, it just hangs everything at some point.
Maybe i did something wrong with the "STA" programming?
i'm at dead end and i'm actually thinking of dropping this project off.. and i've been writing it for a month and a half.

Help!
thanks!!

Ariel.

Re: WebBrowser + Threads help, please! i dunno what to do anymore...

S. Senthil Kumar9-Jul-06 18:58

S. Senthil Kumar

9-Jul-06 18:58

Is your main thread the UI thread (the thread on which Application.Run is called)? If so, you're blocking the main thread with the while (m_hThreads.Count > 0) loop. The main thread cannot pump anymore, so any synchronous Invoke would cause the calling thread to hang.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

can someone post me a simple chat application

lehya9-Jul-06 8:10

lehya

9-Jul-06 8:10

Please help to make a simple chat application using Asp.net C# and XML or SQLserver

Re: can someone post me a simple chat application

Ravi Bhavnani9-Jul-06 9:14

Ravi Bhavnani

9-Jul-06 9:14

Perhaps these articles will help?

/ravi

My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com

Get value to byte() [modified]

hung_ngole9-Jul-06 5:57

hung_ngole

9-Jul-06 5:57

Hi,
I have the following code, how can I get the value of the stream into byte array (the response contains binary data and using the readToEnd() fails)

HttpWebResponse response = request.GetResponse()
System.IO.Stream responseStream = response.GetResponseStream()

Thanks in advance,
Hung.

Hung

-- modified at 12:02 Sunday 9th July, 2006

Re: Get value to byte()

Eran Aharonovich9-Jul-06 7:29

Eran Aharonovich

9-Jul-06 7:29

You can check my article about browsing the WEB with C#:

Browse the WEB with C#

Eran Aharonovich (eran.aharonovich@gmail.com )
Noviway

Re: Get value to byte()

hung_ngole9-Jul-06 16:12

hung_ngole

9-Jul-06 16:12

I have the problem with binary data (Ex: image) not the textual data!
Thanks anyway,
Hung.

Hung

Re: Get value to byte()

Eran Aharonovich9-Jul-06 22:42

Eran Aharonovich

9-Jul-06 22:42

You are right. Sorry.

This is what you need to do:

// Prepare web request...
HttpWebRequest myRequest =
(HttpWebRequest)WebRequest.Create("http://www.noviway.com");

// We use POST ( we can also use GET )
myRequest.Method = "GET";

// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
HttpWebResponse myHttpWebResponse= (HttpWebResponse)myRequest.GetResponse();

// Display the contents of the page to the console.
Stream streamResponse = myHttpWebResponse.GetResponseStream();

MemoryStream memStream = new MemoryStream();

byte[] readBuffer = new byte[256];

// Read from buffer
int count = streamResponse.Read( readBuffer, 0, 256 );

while (count > 0)
{
memStream.Write(readBuffer, 0, count);

// Read from buffer
count = streamResponse.Read( readBuffer, 0, 256);
}

byte[] originalBuffer = memStream.ToArray();

// Release the response object resources.

streamResponse.Close();

// Close response
myHttpWebResponse.Close();

Eran Aharonovich (eran.aharonovich@gmail.com )
Noviway

Re: Get value to byte()

Nader Elshehabi9-Jul-06 11:09

Nader Elshehabi

9-Jul-06 11:09

Hello

Try this:

HttpWebResponse response = request.GetResponse()
System.IO.Stream responseStream = response.GetResponseStream()
byte[] input = new byte[responseStream.Length];
responseStream.Read(input, 0, (int)responseStream.Length - 1);

Regards

Re: Get value to byte()

hung_ngole9-Jul-06 16:11

hung_ngole

9-Jul-06 16:11

Although the stream has data, the length of responseStream is -1. This is the main problem I facing !!

Thanks anyway!
Hung.

Hung

Re: Get value to byte()

S. Senthil Kumar9-Jul-06 19:08

S. Senthil Kumar

9-Jul-06 19:08

According to the MSDN[^] documentation, Read returns the number of bytes actually read. So you could always create a buffer of some arbitrary size, say 512 bytes, and then loop till Read returns less than 512 bytes. Something like.

ArrayList finalBuffer = new ArrayList();
byte []buffer = new byte[512];

int bytesRead = 0;
while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) != 0)
{
   for (int i = 0; i<bytesRead; ++i)
   {
       finalBuffer.Add(buffer[i]);
   }
}

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

more assemblies to one assembly

dedel9-Jul-06 5:48

dedel

9-Jul-06 5:48

Is there a chance to compile more assemblies to one assembly ?

Re: more assemblies to one assembly

Graham Dean9-Jul-06 7:20

Graham Dean

9-Jul-06 7:20

Whereas I am no expert on VS, I have noticed that Dotfuscator Pro has such a facility - the CE edition is supplied free with VS. Search the internet for info. If this doesn't help - sorry but my knowledge is so limited that I am unlikely to be able to help further!

Cheers

Pensioner Graham Dean

Re: more assemblies to one assembly

Guffa9-Jul-06 10:42

Guffa

9-Jul-06 10:42