Re: setting folder/file access after creation - C# Discussion Boards

setting folder/file access after creation

18-Feb-08 23:18

what does

this

refers to in your case? Control.MaximumSize is not read only, you can get/set it. See here: Control..::.MaximumSize Property[^]

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marky77718-Feb-08 22:33

marky777

18-Feb-08 22:33

hi.

I am creating a folder and writing files to it in code. After the file is created, it emails it. After emailing i want to delete it off the sever's disk.

I get the following error after i create the file

The process cannot access the file 'C:\\pdfConversion\\SpiderSearchReport_DAY COLIN ANTHONY.PDF' because it is being used by another process."

I am not using response object to write the file. The file is closed after creation.

Can anyone help me to set the file 2 be able to be deleted after?

Thanks.

Re: setting folder/file access after creation

CKnig18-Feb-08 23:17

CKnig

18-Feb-08 23:17

My guess is that your own process still has the file handle opened.
So make sure that you close the File(Stream?).

Best practice is to surround the FileStream with an using(...){} - so you make sure that Dispose is called and the handle is freed.

If you forget this you will have to wait till the GC kicks in and frees the object for you (or till you close the process)

Re: setting folder/file access after creation

marky77718-Feb-08 23:42

marky777

18-Feb-08 23:42

thanks, i'll try that.

Re: setting folder/file access after creation

marky77719-Feb-08 0:00

marky777

19-Feb-08 0:00

I found out it might be my email sending code that locks the file until it sends it successfully.

How can i check if an email has been sent successfully or not?

"Child is not a child control of this parant"

kakanis18-Feb-08 22:14

kakanis

18-Feb-08 22:14

Hi

I created custom control for panel.My requirment is it accepet only one control in it,for this in oncontroladded i wrote the code
if(controls.count>1)
{
controls.RemoveAt(1);
}
it is working but i am getting "Child is not a child control of this parant"

please Help me

Re: "Child is not a child control of this parant"

LongRange.Shooter19-Feb-08 8:03

LongRange.Shooter

19-Feb-08 8:03

You are not clearly defining your problem which makes it hard for anyone to answer this.
Here is what I think you are saying:

You have a panel that can have a control added to it. (It does not matter if it is your control or a framework control)
So you have logic as follows:

Panel workarea = new Panel;
workarea.OnControlAdded += new EventHandler( LimitControlsHandler );
workarea.Controls.Add( myCustomControl );

So this will then raise an event everytime a new control is added to the panel. So now when that happens your logic should be as follows:

public void LimitControlHandler(object sender, EventArgs args)
{
      if ( workarea.Controls.Count > 1 )
         workarea.Controls.RemoveAt(1);
}

Assuming that the RemoveAt is totally valid logic for the Panel, then your logic should work just fine. Look at what I've listed here and see where your code differs. Then troubleshoot it. It is difficult to tell you what you are doing wrong with the poor amount of information you are providing in this question.

Find multiple instance using Mutex

CodingLover18-Feb-08 22:11

18-Feb-08 22:11

Hi all,

Again this is related to Mutex.

I'll explain my question as follows. I have a server application written using C++. Now I try to automate the server to start it automatically. So I write a .Net service to do that.

It's fine, my service is working fine.

But there is one issue. Actually my server can't run multiple server using the same IP. So I want to find is there any server running on specific IP.

So, I used Mutex.

Here what I have done. First get the each server IP from a data base and on each one test there is any instance going on.

private bool HasMultipleInstance(string IP)
{
    /*
     * No need to acquire or release the Mutex in .Net
     * */
    IPMutex = new Mutex( true, IP + "_mutex_" );
    //IPMutex.WaitOne();

    if( IPMutex != null )
    {
        EventLog.WriteEntry( "MyService", "Multiple Instances on " + IP );
        //IPMutex.ReleaseMutex();
        return false;
    }
    else
        return true;
}

What is your guys comment on this. Is that ok? Actually it write an entry to the event log, when a multiple instance is found..

Thanks in advanced Smile | :)

I appreciate your help all the time...
Eranga Smile | :)

Giorgi Dalakishvili18-Feb-08 22:33

18-Feb-08 22:33

Check this: Making the Application Single-instance[^]

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CodingLover18-Feb-08 22:41

18-Feb-08 22:41

Thanks for the replay.

Actually I found this earlier and seems it's too wired for me. That is because I don't know much about C# and stuff. Do you know any simple tutorial relating to Mutex and my question.

Thanks. Smile | :)

I appreciate your help all the time...
Eranga Smile | :)

Giorgi Dalakishvili18-Feb-08 22:58

18-Feb-08 22:58

Have you tried Google? Mutex[^]

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CodingLover18-Feb-08 23:41

18-Feb-08 23:41

Yes I do.

And at the same time I found one way to do it. Try to do it using a dll. Actually IP is argument for my server application, which is run on console. If I can found the console argument then my question is solved.

What you think about it pal... Smile | :)

I appreciate your help all the time...
Eranga Smile | :)

Giorgi Dalakishvili18-Feb-08 23:48

18-Feb-08 23:48

Which console argument do you need to find? If you mean the one passed to your application, you can use the args parameter which was passed.

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CodingLover18-Feb-08 23:57

18-Feb-08 23:57

Actually that argument means, argument which are set for the command prompt to start the application.

I appreciate your help all the time...
Eranga Smile | :)

Giorgi Dalakishvili19-Feb-08 0:01

19-Feb-08 0:01

If it is possible to pass arguments to your application then the main method will look like this:

<br />
static class Program<br />
{<br />
   static void Main(string[] args)<br />
   {<br />
       //you can retrieve arguments passed through the variable args like this:<br />
       //args[0],args[1], etc depending on how many parameters have been passed.<br />
   }<br />
}<br />

Hope it helps

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CodingLover20-Feb-08 17:44