C# Discussion Boards - CodeProject

Re: Stack OverFlow Exception in C#

led mike25-Jun-07 4:46

led mike

25-Jun-07 4:46

The problem is elsewhere in the call stack

Re: Stack OverFlow Exception in C#

meeram39525-Jun-07 19:53

meeram395

25-Jun-07 19:53

Hi,

I don't understand what you mean. Can you please clarify a little bit.

Meeram395

Re: Stack OverFlow Exception in C#

Guffa25-Jun-07 6:11

Guffa

25-Jun-07 6:11

Standard question #5:
No, that is not the code you are using. It can't produce that result. What does the code you are using look like?

The constructor of the class has to be inside the class, so the code that you have shown doesn't even compile. It's hard to tell what's wrong with a piece of code, when you are not even looking at the code that is actually used.

Post the actual code that you are using, or a complete example that reproduces the error.

---
single minded; short sighted; long gone;

Re: Stack OverFlow Exception in C# [modified]

meeram39525-Jun-07 19:39

meeram395

25-Jun-07 19:39

HI,

Thanks for the reply. The constructor is within the class only. I have put the closing braces wrongly before the constructor. Sorry for that.

-- modified at 1:44 Tuesday 26th June, 2007

Meeram395

Re: Stack OverFlow Exception in C#

Luc Pattyn25-Jun-07 10:27

Luc Pattyn

25-Jun-07 10:27

I'm guessing here: if Hashtable is a class of your own, and its constructor needs
a new Logger, then thatwill need a new Hashtable which needs a new logger etc. until
the stack fills.

Smile | :)

Luc Pattyn

[My Articles] [Forum Guidelines]

Do post your Articles here

MussaratAziz25-Jun-07 4:23

MussaratAziz

25-Jun-07 4:23

Dears,
Post your articles here too
www.exposecode.com

Mussarat Aziz

Re: Do post your Articles here

Dave Kreskowiak25-Jun-07 4:36

Dave Kreskowiak

25-Jun-07 4:36

Your post has been reported as spam, and will be treated as such.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: Do post your Articles here

mav.northwind25-Jun-07 18:57

mav.northwind

25-Jun-07 18:57

Hi Dave!
Did you know that exactly this comment also appears at Marc Clifton's most recent article (http://www.codeproject.com/useritems/TieredErrorManagement.asp)?
Even with the same timestamp?
Some DB entries must have gotten mixed up...

Regards,
mav

--
Black holes are the places where God divided by 0...

Re: Do post your Articles here

Dave Kreskowiak26-Jun-07 2:45

Dave Kreskowiak

26-Jun-07 2:45

Yeah, I tagged that one too, but as I look back at that article, his post has disappeared.

Either way, advertising "Post your articles on MY site!" just doesn't deserve a warm and fuzzy reception around here.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Accessing the default application folder

Richard W Allen25-Jun-07 3:35

Richard W Allen

25-Jun-07 3:35

My code connects to an Access database (SC226_db.mdb), which is installed in the application folder, using the code:

OleDbConnection Connection1 = new OleDbConnection
("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=SC226_db.mdb");
Connection1.Open();

This works fine until a FileOpen dialog is used to access a file in another folder, then my app looks for the database file in this other folder. Can anyone please tel me how to ensure that my app always looks for the database in the application folder?

Re: Accessing the default application folder

Colin Angus Mackay25-Jun-07 3:37

Colin Angus Mackay

25-Jun-07 3:37

There is a setting on the FileDialog to keep or move the current directory. I don't recall exactly what the property is off the top of my head, but it will be in MSDN or you might be able to guess from the intellisense.

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Re: Accessing the default application folder

Tarakeshwar Reddy25-Jun-07 3:41

Tarakeshwar Reddy

25-Jun-07 3:41

You could use the Application.StartupPath.

OleDbConnection Connection1 = new OleDbConnection ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+ Application.StartupPath +"\\SC226_db.mdb");

Re: Accessing the default application folder

Chintan.Desai25-Jun-07 3:47

Chintan.Desai

25-Jun-07 3:47

Try string strCurrentDirectory=Directory.GetCurrentDirectory();
This will return current directory of ur application ie. bin directory.Put ur database(.MDB) file in this directory.

Regards
Chintan
www.visharadsoft.com
(Nothing is so purify as KNOWLEDGE)

Re: Accessing the default application folder

Ed.Poore25-Jun-07 6:48

Ed.Poore

25-Jun-07 6:48

Not necessarily, that current directory can be changed.

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Re: Accessing the default application folder

Martin#25-Jun-07 3:59

Martin#

25-Jun-07 3:59

Hello,

It's System.Enviroment.CurrentDirectory

All the best,

Martin

Re: Accessing the default application folder

Dave Kreskowiak25-Jun-07 4:35

Dave Kreskowiak

25-Jun-07 4:35

Good practice is to ALWAYS use fully qualified path names when accessing files, even in connection strings. You cannot guarantee that the "current directory" will stay that way, so...

string databasePath = Path.Combine(Application.StartupPath, @"SC226_db.mdb");
string connString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}", databasePath);

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: Accessing the default application folder

led mike25-Jun-07 4:44

led mike

25-Jun-07 4:44

Dave Kreskowiak wrote:
Good practice is to ...

Re: Accessing the default application folder

Dave Kreskowiak25-Jun-07 5:05

Dave Kreskowiak

25-Jun-07 5:05

Well, it's true! Laugh | :laugh:

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Efficient way to check if web resource/file exists?

Dominic Pettifer25-Jun-07 2:43

Dominic Pettifer

25-Jun-07 2:43

Whats the best most efficient way of checking whether a resource (image, page, document etc.) exists at a particular URL web address location. Eg. I have a url http://www.example.com/myImage.jpg and I want to check whether myImage.jpg actually exists.

At the moment I'm using the WebClient class like so...

WebClient client = new WebClient();<br />
<br />
try<br />
{<br />
  if(client.Download("http://www.example.com/myImage.jpg").Length > 0)<br />
  {<br />
    // File exists<br />
  }<br />
  else<br />
  {<br />
    // File doesn't exist<br />
  }<br />
}<br />
catch<br />
{<br />
  // File doesn't exist<br />
}

...problem with this method though is that it downloads the entire file to check it's existence. I'm not interested in the file, just whether the server will return a 404 or not.

Cheers!

Dominic Pettifer

Blog: www.dominicpettifer.co.uk

Re: Efficient way to check if web resource/file exists? [modified]

I.explore.code25-Jun-07 3:25

I.explore.code

25-Jun-07 3:25

Include System.IO and System.Text namespace to your project

Then you would be able to access File class which has a method defined for checking the existence of files as shown below

if (File.Exists(@"//localhost/command.gif") == false)
{
Response.Redirect("FileNotFound.htm");
}
else
{
Response.Write("File Exists");
}

I tested this code on my localhost, it works fine. I think this code would access the client machines path for the file and not the server's, just verify and let me know.

-- modified at 9:37 Monday 25th June, 2007

Re: Efficient way to check if web resource/file exists?

User 665825-Jun-07 3:28

User 6658

25-Jun-07 3:28

gladiatron wrote:
I tested this code on my localhost, it works fine. I think this code would access the client machines path for the file and not the server's, just verify and let me know.

Just tested it with IronPython:

>>> ex = File.Exists("http://www.codeproject.com/script/images/news_answer.gif")
>>> ex
False

regards

modified 12-Sep-18 21:01pm.

Re: Efficient way to check if web resource/file exists?

I.explore.code25-Jun-07 19:49

I.explore.code

25-Jun-07 19:49

Your question is very vague..why do you need to write the code to check for file existence on some other web server ? Its a built in thing, if u request for a non-existent page, the logic on that server will automatically handle the request and show you an error page. However, if u wanna do this for your own server you can, using the below given code.

if (File.Exists(Server.MapPath("web.gif")))
{
Response.Write("File Exists");
}
else
{
Response.Redirect("FileNotFound.htm");
}

This code will map the virtual path of your server so if some client browser requests for a file that does not exist on your web server, he will get an error page other wise the page will load, now it depends on you how you customize the application for your clients.

Re: Efficient way to check if web resource/file exists?

Dominic Pettifer25-Jun-07 22:03

Dominic Pettifer

25-Jun-07 22:03

Long story but we have a list of external URLs which point to images on another web server, which we need to display on our site via an img tag or asp:Image control. Thing is some of these URLS are incorrect and point to images that don't exist, and rather than display an empty image box with a red X, they want a replacement image instead. Basically, they want us to guard against their own bad data. I know it's additional overhead but it's what they want, I think I can optimise it by caching the state of the external image for a time. But File.Exists("http://www.example.com/image123.jpg"); should do the trick.

If you know of a more efficient way let me know. Cheers! Smile | :)

Dominic Pettifer

Blog: www.dominicpettifer.co.uk

datagrid with row header

Sunshine Always25-Jun-07 2:37

Sunshine Always

25-Jun-07 2:37

hi my application is written in C# in .NET compact framework 2003.
i need to display data in tabular form with row headers instead of column headers.
any suggestions?
thanks

Parsing a log file using regular expressions

salon25-Jun-07 2:26

salon

25-Jun-07 2:26

I have a text file say log file. i have to extract all the characters between "<" sign and ">" sign.
i.e. between <> and put it into the database and log file is of kind

Sun, 24 Jun 2007 21:49:49 GMT: Received request , from <111.1.11.11>:<1111> at domain <localhost abc.net="">
Sun, 24 Jun 2007 21:49:49 GMT: UserName <abc>, Proxy <localhost-80>, URN <http: abc="" abc.gif="">
Sun, 24 Jun 2007 21:49:49 GMT: Processing Proxy request
Sun, 24 Jun 2007 21:49:50 GMT: Sending Msg <111> from Proxy Reader <1111111111> for URL <http: abc.abc="">with Params <> <abc>

Sun, 24 Jun 2007 21:49:50 GMT: Named pipe <\\.\pipe\1111111111> started for request <http: abc.abc="">

Sun, 24 Jun 2007 21:49:50 GMT: Received request , from <111.1.11.11>:<1111> at domain <localhost abc.net="">

Sun, 24 Jun 2007 21:49:50 GMT: UserName <abc>, Proxy <localhost-80>, URN <http: abc="" abc.gif="">

Sun, 24 Jun 2007 21:49:50 GMT: Processing Proxy request

Sun, 24 Jun 2007 21:49:52 GMT: Received Msg <222> for URL <http: abc.abc="">
Sun, 24 Jun 2007 21:49:52 GMT: Status: 200 OK, Reminder: Server: Microsoft-IIS/5.1

X-Powered-By: ASP.NET
Date: Mon, 25 Jun 2007 04:48:33 GMT

Content-Type: text/html

Accept-Ranges: bytes

Last-Modified: Thu, 22 Mar 2007 05:29:17 GMT

Sun, 24 Jun 2007 21:49:52 GMT: Last chunck read from pipe \\.\pipe\1111111111 for <http: abc.abc="">: <963>

Sun, 24 Jun 2007 21:49:52 GMT: Closing pipe <\\.\pipe\1111111111> for url <http: abc.abc="">

and i want to parse this file and extract and put the information from <> sign into the database
i had followed following link for file parsing
and instead of putting the info in dataset i m putting it into database.
Now my problem is my log file is of above format and i have to parse all the info within <>

I m using C# 1.1 version
does anybody have any idea or suggestions?
Thanks in advance

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