Need Help ! - C# Discussion Boards

Pete O'Hanlon10-Sep-09 3:08

Pete O'Hanlon

10-Sep-09 3:08

I'd recommend using a guard clause instead. I know you've answered the OP here, but it's better to do the following:

try
{
}
catch (...)
{
}
finally
{
  if (conn.Open)
    conn.Close();
}

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

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Nagy Vilmos10-Sep-09 3:38

Nagy Vilmos

10-Sep-09 3:38

Probably better [he says after checking that is exactly what I have done] but I do have the closure in the finally block inside it's own try/catch.

Panic, Chaos, Destruction.
My work here is done.

Henry Minute10-Sep-09 4:14

Henry Minute

10-Sep-09 4:14

Wouldn't

using (whateverConnection conn = new whateverConnection())
{
  try
  {
    // do stuff
  }
  catch
  {
    // complain a lot
  }
}

be a better approach for the OP?

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Writing a custom exception and the "meaning" of the code

carlecomm23-Sep-09 0:55

carlecomm

23-Sep-09 0:55

finally
{
if(con != null)
con.close() ;
}

modified 27-May-14 5:30am.

Kaare Tragethon10-Sep-09 1:47

Kaare Tragethon

10-Sep-09 1:47

Hi.

I'm a total beginner in C# (and PC programming), but I'm starting to get the logic to work allright so I've got some hours in front of the computer. A couple of days ago I wanted to throw my own exception and I used the intellisense codesnippet to generate a new custom exception class. This works great and I have no problems using it, however I do not fully understand WHAT the lines of code actually do (how they work and what they are for). Since I got it working, I guess I really don't have to know what it does (since it is in fact working), however to expand my knowledge (and possible learn some tricks for the future) I would like to know what each line of the auto-generated code actually does, and what it is for.

Would anyone please do a quick explain of the code? I have pasted the auto-generated code here:

[global::System.Serializable]
public class IndexException : Exception
{
    //Autogenerated code
    public IndexException() { }
    public IndexException(string message) : base(message) { }
    //public IndexException(string message, Exception inner) : base(message, inner) { }
    protected IndexException(
      System.Runtime.Serialization.SerializationInfo info,
      System.Runtime.Serialization.StreamingContext context)
        : base(info, context) { }
}

Re: Writing a custom exception and the "meaning" of the code

Not Active10-Sep-09 1:51

Not Active

10-Sep-09 1:51

Have a look here[^] and here[^]

only two letters away from being an asset

Re: Writing a custom exception and the "meaning" of the code

Kaare Tragethon10-Sep-09 2:00

Kaare Tragethon

10-Sep-09 2:00

Thanks a lot!!

I've already seen the msdn article (which for me who don't know very much about PC programming yet did not help my understanding very much). However, the other article looks great!!

Thanks again!

Need Help !

Jacobb Michael10-Sep-09 1:30

10-Sep-09 1:30

Hi Friends !

I need some help on Web Browser Control.
If anybody has worked with this control pls share your ideas!

waiting for your ping...(reply)

thanks

Arun Jacob10-Sep-09 1:32

Arun Jacob

10-Sep-09 1:32

vats the pblm using webbrowser control?Have u tried that?

Plz avoid using Need Help ! as subject line, instead specify your specific subject Hmmm | :|

Arun Jacob
http://codepronet.blogspot.com/

Jacobb Michael10-Sep-09 1:38

10-Sep-09 1:38

i am using the code like bellow, but it does not work

SHDocVw.InternetExplorer browser;
                      browser.FileDownload += new DWebBrowserEvents2_FileDownloadEventHandler(browser_FileDownload);

 void browser_FileDownload(ref bool Cancel)
        {
            //throw new Exception("The method or operation is not implemented.");
        }

while i download all the event is not fired.

but other events like browser.DocumentComplete, browser.BeforeNavigate2 etc is fired properly

do u have any suggestion

Arun Jacob10-Sep-09 1:50

Arun Jacob

10-Sep-09 1:50

jasome wrote:
SHDocVw.InternetExplorer browser;
browser.FileDownload += new DWebBrowserEvents2_FileDownloadEventHandler(browser_FileDownload);

Is InternetExplorer the WebBrowser control?Which event having this line of code?Have you put a break point and check 2 see if this event is firing at any stage?

Arun Jacob
http://codepronet.blogspot.com/

Jacobb Michael10-Sep-09 1:58

10-Sep-09 1:58

Well i just give the entire code block.

 private SHDocVw.InternetExplorer browser;
 private SHDocVw.ShellWindows shellWindows;
 private ArrayList Current_IE_Handles;

#region Constructors
        public Form1()
        {
            InitializeComponent();
            Current_IE_Handles = new ArrayList();
            shellWindows = new SHDocVw.ShellWindowsClass();
            shellWindows.WindowRegistered += new SHDocVw.DShellWindowsEvents_WindowRegisteredEventHandler(shellWindows_WindowRegistered);
            shellWindows.WindowRevoked += new SHDocVw.DShellWindowsEvents_WindowRevokedEventHandler(shellWindows_WindowRevoked);
        }
        #endregion


private void shellWindows_WindowRegistered(int z)
        {
            string filnam;

            foreach (SHDocVw.InternetExplorer ie in shellWindows)
            {
                filnam = Path.GetFileNameWithoutExtension(ie.FullName).ToLower();

                if (filnam.Equals("iexplore"))
                {
                    browser = ie;

                    bool check = true;

                    for (int i = 0; i < Current_IE_Handles.Count; i++)
                    {
                        if (Current_IE_Handles[i].ToString() == browser.HWND.ToString())
                        {
                            check = false;
                        }
                    }

                    if (check == true)
                    {
                        browser.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(browser_DocumentComplete);
                        browser.FileDownload += new DWebBrowserEvents2_FileDownloadEventHandler(browser_FileDownload);
                    }
                }
            }
        }

 void browser_FileDownload(ref bool Cancel)
        {
            //throw new Exception("The method or operation is not implemented.");
        }

After running this program
when you open Internet Explorer(IE) the DOM object will be created.
and when ever the changes happens in the IE(navigate,document completer,) event will be fired.
using that i have traced all the visited urls,popups,print activity,etc but i dont get event fired for File Download

thanks

Re: Need Help !

Not Active10-Sep-09 1:44

Not Active

10-Sep-09 1:44

Stop reposting. Your question below had a more appropriate title.

only two letters away from being an asset

Re: Need Help !

Jacobb Michael10-Sep-09 1:48

10-Sep-09 1:48

thanks for the comment,
i do so !

Try Different Do Best
Jacob

Is any event available ?

Jacobb Michael10-Sep-09 1:24

Re: Is any event available ?

10-Sep-09 1:24

Hi all,

Is there any event available to trace file download using C#?

for example : downloading file from GMAIL.

thanks

Arun Jacob10-Sep-09 1:25

Arun Jacob

10-Sep-09 1:25

jasome wrote:
Is there any event available to trace file download using C#?

vat u mean by trace file download? Confused | :confused:

Arun Jacob
http://codepronet.blogspot.com/

Re: Is any event available ?

Jacobb Michael10-Sep-09 1:33

Re: Is any event available ?

10-Sep-09 1:33

thanks for your reply.

i need to get just an event, while downloading the file from IE.
from that i want to know the files that are downloaded.

thanks

Dave Kreskowiak10-Sep-09 4:44

Dave Kreskowiak

10-Sep-09 4:44

There's no such event.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

convert byte to octet

hadad10-Sep-09 1:16

hadad

10-Sep-09 1:16

Hello,
I'm reading a MID file a nokia ringtone file and I want to convert every byte in it to octet then to hex but I don't know how? I am searching how to sen ring tones?
Thanks

Dad

stancrm10-Sep-09 2:24

stancrm

10-Sep-09 2:24

To convert byte -> octet and byte -> hex :

byte myByte = 250;
string octet = Convert.ToString(myByte, 8);
string hex = Convert.ToString(myByte, 16);

To send the ring tone, I think you must use the AT command from nokia, see the Manual.
Search it in nokia website for AT command.

Then use SerialPort class for writing AT command to phone.

musefan10-Sep-09 2:31

musefan

10-Sep-09 2:31

I was looking at the Convert Class but not familiar with it and didn't want to do too much reading for someone else Poke tongue | ;-P

Life goes very fast. Tomorrow, today is already yesterday.

stancrm10-Sep-09 3:19

stancrm

10-Sep-09 3:19

so... no reading -> no answer next time.

musefan10-Sep-09 3:21

musefan

10-Sep-09 3:21

But I gave an answer to 1 of the two conversions, surely that is allowed?

Life goes very fast. Tomorrow, today is already yesterday.

musefan10-Sep-09 2:30

musefan

10-Sep-09 2:30

I am confused as why you need to convert a Byte to either octet of hex in order to send data? after all both Octet and Hex are just different was to display a byte value. If you want to convert a byte (or int) to string values for hex then...

string hex = myInt.ToString("X");//Convert to hex string

...I'm not sure of an easy way to convert an int to octet string thou sorry

Life goes very fast. Tomorrow, today is already yesterday.