|
You could create a thread, spins in a loop and reinitializes the FileSystemWatcher from time to time using Thread.Sleep in between. As FileSystemWatcher uses events this would effectively create a mix of polling and signaling.
|
|
|
|
|
Yes i already do so, but i think: 'is this mix good?', isn't it better only to poll the file system instead using the file system watcher?
|
|
|
|
|
I would think this is ok, and you can decide how often you poll, just don't do it all the time. You may use a flag for poll-only mode which reduces the polling period and disables the FileSystemWatcher, which would make it kind of universal. You could even call the same callback.
|
|
|
|
|
Another downside of the FSW is that it can only be used with NTFS filesystems (FAT may be possible as well, don't know 100%). So if you're trying to watch a file on a SMB share you won't get any events.
Regards,
mav
--
Black holes are the places where God divided by 0...
|
|
|
|
|
Why not use a PrintDialog (the WinForms one) instead? With this, you don't have to use P/Invoke for anything.
|
|
|
|
|
Hi all,
Can any one help me out if my application's code is correct to read an Inbound Xml file pointing to my application from another platform API's.
Here is the code in the page_load event.
protected void Page_Load(object sender, EventArgs e)
{
string xml = Request.Form["XML"];
DateTime dateNow = DateTime.Parse(DateTime.Now.ToString());
string contentName = dateNow.ToString("yyyyMMddhhmmsstt");
string dateOnly = dateNow.ToString("yyyyMMdd");
string hourOnly = dateNow.ToString("HHtt");
string path = Server.MapPath("./text/revers.xml");
string billingMsg = "Thank you for you message. You have been .";
string username = "test";
string password = "test";
string xmlOut = string.Empty;
if (!string.IsNullOrEmpty(xml))
{
int DbPosition = GetNextId();
ProcessMoMms(xml, path, contentName, billingMsg, username, password, DbPosition, dateOnly, hourOnly);
xmlOut = GetXmlString(path);
xmlOut = HttpPost("http://gateway.input.com/MtReceiver", xmlOut);
Response.Write("OK");
Response.End();
}
else
Response.Write("The post field xml has not been defined.");
}
}
|
|
|
|
|
Hi
Can any one help me to find the current user domain.
I am using the follwing code:
WindowsIdentity wIdentity= WindowsIdentity.GetCurrent();
Its listing only the current system connected domain.
For ex:
I belongs to domain retail, if i log in using my userid and domain("retail") from other machine belongs to other domain, its giving that system domain instead of my domain. Help me please.
kesavan
|
|
|
|
|
What is this for? ASP.Net or something else?
FOr ASP.Net the code you have there is correct, if it's giving you the wrong results then you probably don't have impersonation setup correctly.
If it's for something else then check out the System.Environment[^] class.
|
|
|
|
|
I am tring to create a series of dynamic tables using c# .net
I can add rows and data to a table already created in my aspx page but as soon as I try and create a new table I get nothing. I know this is down to me not doing something but I can't seem to find out what. Here is my basic code, it is only for one table, but that will be changed once I can display this one:
Table testTbl = new Table();
testTbl.ID = "testTbleID";
TableRow testTblRow = new TableRow();
TableCell testTblCell = new TableCell();
TableRow testTblRow1 = new TableRow();
TableCell testTblCell1 = new TableCell();
testTblCell.Text = "Hello World!!";
testTblRow.Cells.Add(testTblCell);
testTbl.Rows.Add(testTblRow);
testTblCell1.Text = "Hello Again World!!";
testTblRow1.Cells.Add(testTblCell1);
testTbl.Rows.Add(testTblRow1);
What do I have to do to get the table to write on the page? I know it is created as I can response.write the number of rows in it?
any help would be appreciated, I know it's something simple, it always is!
Thanks in advance
mark
|
|
|
|
|
Take Literal control
Literal lit = new Literal();
lit.Controls.Add(testTbl);
Try this..........
|
|
|
|
|
Satish,
Thanks for your reply, I can see where you're coming from I think, but I just get the following error?
Exception Details: System.Web.HttpException: 'System.Web.UI.WebControls.Literal' does not allow child controls.
I tried LiteralControl aswell but got the same error?
Is this the only way to do it?
thanks again
|
|
|
|
|
You need to add the table to your page's controls collection.
form1.Controls.Add(testTbl );
'form1' can be the pages Form, or you can use a Panel or PlaceHolder.
"More functions should disregard input values and just return 12. It would make life easier." - comment posted on WTF
"This time yesterday, I still had 24 hours to meet the deadline I've just missed today."
|
|
|
|
|
that was perfect!!
thank you soo much, I could have done with that ages ago for other things, as I actually wanted to add the table to a panel, I just replace form name with panel name.
Thanks again
mark
|
|
|
|
|
hi everyone!
i do have a consol application which will be changed to a service.
i do want the application to check a folder periodically, if there are (new) files in it. if so, then the application does it's duty, if there is nothing (new) then it does nothing.
i am not sure how to do this. first i thought to do it with an endless loop (e.g. while(true)) but will this terminate without an exception when the service is shotdown?
does anyone of you have an idea?
simply checking for an empty folder won't help, because the folder could be empty for some amount of time. so it has to be something like
<br />
while (service_active)<br />
{<br />
Filelist = Directory.GetFiles(sourcepath, searchpattern);<br />
if Filelist.Length > 0<br />
{<br />
}<br />
}<br />
does anyone of you have an idea how to do this?
thanks.
stephan.
|
|
|
|
|
stephan_007 wrote: if there are (new) files in it
Did you consider a FileSystemWatcher based implementation?
Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips
Yesterday is a canceled check. Tomorrow is a promissory note. Today is the ready cash. USE IT.
|
|
|
|
|
Use the FileSystemWatcher[^] class.
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
|
|
|
|
|
thanks for the hint. but i might have encountered a new problem:
my program (service in the end) checks for files in a folder as long as it is terminated. to start the programm is simple, because i do only have to add the lines of code from my console program to the onstart section.
but what happens, when i stop the service? does it through an exception when the operation is still active? or what do i have to do/implement in the onstop section to let it terminate correctly? do i have to code threads or is there a chance to tell c# to wait until the current operation (periodically check for new files in folder) is finished and shutdown afterwards?
|
|
|
|
|
When the service is stopped/paused, set the EnableRaisingEvents property of the FileSystemWatcher to false. The component will no longer react to file/directory changes. When the service is started/resumed, set the property back to true.
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
|
|
|
|
|
thanks for this hint.
i am still wondering if i want to check the directory lets say every 10 sec or lets say every 1 min if this won't consume system resources. because when i do a
while ((lastwatch - now) < 60 secs))
{
// do nothing and wait
}
this consumes systemresources. i think it would be a better solution to send the service to sleep until the new check of the folder. in delphi there is a sleep() function. but is there anything similar in c#? because if there is then i would do the following:
1) sleep for 10 secs, 30 secs or how long ever
2) check directory for files
3) do the operation
and then start at 1 again until the service is stopped.
so is there something similar in c# like sleep() in delphi? because i do want the service to be inactive for some amount of time, check for new files after this time of inactivity and then go back to sleep afterwards.
thanks.
stephan.
|
|
|
|
|
this helped me a lot. but i encountered a new problem: when the file enters the directory which is watched and is still locked by the system copy handler, the file can't be accessed.
e.g. the program watches the directory "watchdir". lets say i copy a file to this directory, then the eventhandler fires already before the file is propperly written to this folder.
this happens, when the program accesses the file which is just copied.
do you have an idea how to handle this? should i delay until it is written?? but in the beginning i do not know how long this will take.
this situation does not occure when there are more files and the file, which is sorted at the top is not the first one handled. meaning lets say, we do have file a and file b. if file b is the last one being written, then there is no problem, if it is file a which is written as the last file, then it is still logged and can't be accessed.
the best solution would be to either ignore or try again some ms later. but what if there is a new file which is sorted before this file. then we have to wait again.
so lets say i do copy the file "file123" then it is accessed at once but might still be protected by the copy handler of windows.
in case of more than one file, if the first file after sorting is accessed then it is the same situation like above, otherwise the error doesn't occure.
any ideas?
|
|
|
|
|
Have a look at SystemEvents.SessionEnding
Luc Pattyn [Forum Guidelines] [My Articles]
this months tips:
- before you ask a question here, search CodeProject, then Google
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get
- use PRE tags to preserve formatting when showing multi-line code snippets
|
|
|
|
|
hi
i want to search a word from a textfile and save that in a excel sheet
rajeev kumar sharma
vri software pvt. ltd.
new delhi India
|
|
|
|
|
Hi,
Chekc this.
public static bool SearchWord(string word)<br />
{<br />
StreamReader re = File.OpenText("test.txt");<br />
string input = null;<br />
while ((input = re.ReadLine()) != null)<br />
{<br />
if(input.indexOf(word,0)>0)<br />
{<br />
re.close;<br />
return true;<br />
}<br />
}<br />
re.close;<br />
return false;<br />
}<br />
<br />
Thanks,
Sun Rays
Rate this post if you like answer.
My Articles
|
|
|
|
|
I think u get the data easily form text file.
After getting data from Excel file, u can write in to Excel file
U have to see the following links. Go through this. It may help you a lot.
http://www.codeproject.com/useritems/Write_Data_to_Excel_using.asp
http://www.developerfusion.co.uk/forums/p/29795/109392/
http://support.microsoft.com/kb/306023
G. Satish
|
|
|
|
|
Hello,
I have the following problem: I have a WCF which gets informations from a HTML page, therefor I use a WebBrowser control. But anyway it sucks. How I do it:
1. Starting host => calls method for browsing
2. host gets data request from client => at the WCF a timer becomes started, so all x time units the method for browsing is called and the data is send to the client
1. is no problem, but at 2. I get a ThreadStateException when creating WebBrowser control. The calling thread is not STA and so on. So I thaught, I call the browsing method in a new thread, which StateApartment I set to STA. But it does not work: 1. no problem, but at 2. the thread never comes back. Has anybody an idea what the problem is or how to get it working??? Thanks for your help.
The calling of the browsing method:
Thread parserThread = new Thread(parse);<br />
parserThread.SetApartmentState(ApartmentState.STA);<br />
parserThread.Start(address);<br />
parserThread.Join();<br />
Console.WriteLine("after join");
The browsing method:
private void parse(object addressParameter)<br />
{<br />
string address = addressParameter.ToString();<br />
WebBrowser browser = new WebBrowser();<br />
browser.DocumentCompleted +=<br />
new WebBrowserDocumentCompletedEventHandler(OnDocumentCompleted);<br />
try<br />
{<br />
this.documentCompleted = false;<br />
<br />
browser.Navigate(new Uri(address));<br />
<br />
while (!this.documentCompleted)<br />
{<br />
Application.DoEvents();<br />
Thread.Sleep(1000);<br />
}<br />
<br />
HtmlDocument htmlDocument = browser.Document;<br />
<br />
...<br />
}<br />
catch (Exception ex)<br />
{<br />
Console.WriteLine(string.Format("Error in parse: {0}", ex));<br />
}<br />
<br />
browser.Dispose();<br />
}
greets
pkoeppe
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
