Re: File transfer - C# Discussion Boards

7-Sep-06 18:57

Hi all,
I have created a chat application, and one of it's functionality to send files to the connected user.
I read the contents of the files into a Byte array and send that through sockets.
Now when i send a file of 150 kb size the file seems to be corrupted at the receivers end.
some part of the file is not received.
Is there any restriction of size for sending files across internet using sockets?

I am able to send small files without any problem.
When i run the same application locally, i am able to send huge files of 3-4 MB easily.

Can anyone point out why this is happening?

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Niiiissssshhhhhuuuuu7-Sep-06 19:48

Niiiissssshhhhhuuuuu

7-Sep-06 19:48

Hi,

System.IO.FileStream fstream = new System.IO.FileStream(filename, System.IO.FileMode.Open, System.IO.FileAccess.Read);
byte[] buffer = new byte[fstream.Length];
fstream.Read(buffer, 0, buffer.Length);
fstream.Close();
//writing to the network stream//
outStream = this.Client.GetStream();
for (int i = 0; i < buffer.Length; i++)
{
//outStream.Write(buffer, 0, buffer.Length);
outStream.WriteByte(buffer[i]);
}
I have used this and its working correctly.... Cool | :cool:

nishu

AB77717-Sep-06 20:16

7-Sep-06 20:16

Thanks for the reply,
but i have a defined format of the messages that are sent across.
And i send the file contents in that message i.e.
i read the bytes of the file and send that at once.
is that creating any problem?

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Niiiissssshhhhhuuuuu7-Sep-06 21:42

Niiiissssshhhhhuuuuu

7-Sep-06 21:42

Can you please tell me how you are doing ecxactly coz I have creadted a similar kind of application in which I have a seperate thread to process the sending of the file.
You are sending in a message format right?i didnt get that part of yours acxactly.
Can you please tell me in little detail so that i can help you ,
Other side at recieving end what are you doing?you are parsing your messages ?
-- Cool | :cool:

nishu

AB77717-Sep-06 22:00

7-Sep-06 22:00

ok, just tell me how do i create a separate thread to receive file from the same socket stream?

Becuase what i want is during the file transfer if some sends some text message that message should also be received and displayed.

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

Niiiissssshhhhhuuuuu10-Sep-06 17:47

Niiiissssshhhhhuuuuu

10-Sep-06 17:47

I was on vacation thats y I coudnt answer your question that time,
See what you do,send some special message for sending the file ,after receiving the message from the other side open new socket with specific port in different thread,and continue the process ,after reaching end of the file,close that socket.You will have to implement theading for multiple file transfer or everyting will be messed up.

Now you must have got your answer ,right?
If you face any more difficuties post me,ok?

enjoy buddy Cool | :cool:

nishu

AB777110-Sep-06 18:23

folder and file difference

10-Sep-06 18:23

ok, now one question,
wht if the user is connected to more than one buddies and while some one is sending file to this user, some one else sends some text message.
Do u think these messages will mess up as they will be received thru the same port.
Also is there any chances of exception when 2 threads are using the same port?

Thanks & Regards,
Pramod
"Everyone is a genius at least once a year"

chandler837-Sep-06 18:50

chandler83

7-Sep-06 18:50

how to identify whether a dropped object in my application is a file or a folder.

atpresent, i am using File.Exists method and Directory.Exists.

Is thr any other way to find out.
Actually if we rightclick a file or folder and select properties... it will tell us whether it is a file or folder(Type: FileFOlder or File)

any ways to retrive tht information.

I am using C# application.

Re: folder and file difference

mikone7-Sep-06 21:18

mikone

7-Sep-06 21:18

this depends on the input you get.
where do you retrieve the file/folder list from and how does it structure look like?

If you can not make a difference between files and folders in the input you will have to do it as you currently do.

So please tell me how your input (of files/folders) looks like.

Re: folder and file difference

Stefan Troschuetz7-Sep-06 21:48

Stefan Troschuetz

7-Sep-06 21:48

I assume you receive the path of the dropped object. If so you could do the following:

bool isDirectory = ((File.GetAttributes(path) & FileAttributes.Directory) == FileAttributes.Directory);

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de

Re: folder and file difference

chandler838-Sep-06 0:52

chandler83

8-Sep-06 0:52

Thank u both for guiding me.

how to create a mobile application in C#?

yousafzai7-Sep-06 18:04

yousafzai

7-Sep-06 18:04

how i can create a mobile application in C#.
plz reply me as soon as possible thanks.

Re: how to create a mobile application in C#?

Nader Elshehabi7-Sep-06 18:19

Re: how to create a mobile application in C#?

7-Sep-06 18:19

Hello

It depends on what model you want you app to run.
If you are programming for smartphones use .Net compact framework.
If you are programming for symbian use Appforge CrossFire[^].

Regards

yousafzai7-Sep-06 18:24

yousafzai

7-Sep-06 18:24

ok i need a small application on smartphones in C#.thanks

Re: how to create a mobile application in C#?

Not Active7-Sep-06 18:29

Not Active

7-Sep-06 18:29

Create Smart Device application. File -> Project -> Visual C# -> Smart Device

only two letters away from being an asset

Problem With ListBox Horizontal Scrollbar

Aslam Bari7-Sep-06 17:30

Aslam Bari

7-Sep-06 17:30

Dear all,
I have add a listbox with following property on
listbox1.DrawMode=OwnerDrawVariable;
listbox1.HorizontalScrollbar=true;
listbox1.ScrollAlwaysVisible=true;

I am overriding the DrawItem event of the ListBox for drawing item's text. Some text are too big to fit in the list box. But the Horizontal Scrollbar is not enabled or working. Horizontal scrollbar is visible and [disable or dim]. Vertical scrollbar is working fine.

Please help.

Re: Problem With ListBox Horizontal Scrollbar

Nader Elshehabi7-Sep-06 18:14

Re: Problem With ListBox Horizontal Scrollbar

7-Sep-06 18:14

Hello

Listboxes implement auto horizontal scroll by default. Why do you do all this?? Once you input an item that has a long enough text, the horizontal scrollbar should appear with the proper size!!

If you want to set this manually -for one reason or the other- don't forget to set ListBox.HorizontalExtent to the right size.

Regards

Aslam Bari8-Sep-06 20:21

Aslam Bari

8-Sep-06 20:21

Thanks Nader,
My Problem has resolved. I was not using HorizontalExtent. Now i realize this is important property. So very very thanks.

Now I have a samll question too. What is the easiest way to give a shortcut key to a Button in C#. Like Ctrl+S or F6 etc.
Thanks...

Registry Scan

oskardiazdeleon7-Sep-06 16:45

oskardiazdeleon

7-Sep-06 16:45

I have been working with RegistryKeys (Create, Delete, Modify) however i do not know how to read the whole registry. I am looking for certain keys, but they end up being all over the place. I need to be able to identify their exact path.

I am working in Windows Forms C#

Thanks

Re: Registry Scan

Nader Elshehabi7-Sep-06 18:00

7-Sep-06 18:00

Hello

oskardiazdeleon wrote:
i do not know how to read the whole registry

The registry is a tree of keys. The main 5 are present in the System.Win32.Registry Class. You can access them one by one using recursive calling to scan all subkeys but that will be very lenthy!!

oskardiazdeleon wrote:
I need to be able to identify their exact path.

Be carful when -or if- you scan the registry of similar names. You should identify your key by its full name. Besides the registry structue is quite constant for a given windows version. What you are looking for will probably be in the same location on other machines running the same version.

Regards

Re: Registry Scan

oskardiazdeleon8-Sep-06 10:07

oskardiazdeleon

8-Sep-06 10:07

Thank you for replying. I appreciate you sharing your knowledge. Are there functions within the Registry class that would allow me to scan it?

Im assuming i have to setup a while statement to read through each key within the the tree.

Would you have any idea of how to start off the syntax?

Thank you I appreciate your help

Re: Registry Scan

Nader Elshehabi8-Sep-06 13:11

Re: how to export summaries?

8-Sep-06 13:11

Hello

Not a while loop. Here is a sample code of how to go through all keys in the registry using foreach loops and recursive function calling:

private void ScanRegistry()
    {
        RegistryKey Key;
        //Do somehting with the main 5 keys
        foreach (string subkey in Registry.ClassesRoot.GetSubKeyNames())
        {
            Key = Registry.ClassesRoot.OpenSubKey(subkey);
            MessageBox.Show(Key.Name);
            //Do somehting with the key
            ScanKey(Key);
        }
        foreach (string subkey in Registry.CurrentConfig.GetSubKeyNames())
        {
            Key = Registry.ClassesRoot.OpenSubKey(subkey);
            MessageBox.Show(Key.Name);
            //Do somehting with the key
            ScanKey(Key);
        }
        foreach (string subkey in Registry.CurrentUser.GetSubKeyNames())
        {
            Key = Registry.ClassesRoot.OpenSubKey(subkey);
            MessageBox.Show(Key.Name);
            //Do somehting with the key
            ScanKey(Key);
        }
        foreach (string subkey in Registry.DynData.GetSubKeyNames())
        {
            Key = Registry.ClassesRoot.OpenSubKey(subkey);
            MessageBox.Show(Key.Name);
            //Do somehting with the key
            ScanKey(Key);
        }
        foreach (string subkey in Registry.LocalMachine.GetSubKeyNames())
        {
            Key = Registry.ClassesRoot.OpenSubKey(subkey);
            MessageBox.Show(Key.Name);
            //Do somehting with the key
            ScanKey(Key);
        }
        foreach (string subkey in Registry.PerformanceData.GetSubKeyNames())
        {
            Key = Registry.ClassesRoot.OpenSubKey(subkey);
            MessageBox.Show(Key.Name);
            //Do somehting with the key
            ScanKey(Key);
        }
        foreach (string subkey in Registry.Users.GetSubKeyNames())
        {
            Key = Registry.ClassesRoot.OpenSubKey(subkey);
            MessageBox.Show(Key.Name);
            //Do somehting with the key
            ScanKey(Key);
        }
    }

    private void ScanKey(RegistryKey Key)
    {
        //Do somehting with the key
        RegistryKey subKey;
        foreach (string subkeyname in Key.GetSubKeyNames())
        {
            subKey = Key.OpenSubKey(subkeyname);
            MessageBox.Show(subKey.Name);
            ScanKey(subKey);
        }
    }

Regards

how to export summaries?

michal.kreslik7-Sep-06 16:25

michal.kreslik

7-Sep-06 16:25

Hello,

how can I export the summaries (the structured hints for methods, arguments etc.) so that they will be available outside the project?

I've built a DLL with commonly used classes and methods and described it with summaries. Now I would like to make those summaries available for projects that use this DLL.

How this can be done? There must be a way to export the summaries to DLL metadata or so.

Thanks,
Michal

Nader Elshehabi7-Sep-06 18:03