Visual Basic

4-Jul-05 20:30

Do MSMQ really copy objects (like text files) into queue or do they only copy the content of that object?

Dave Kreskowiak5-Jul-05 2:46

5-Jul-05 2:46

Text files? It's a Message Queue, not a file queue. It's for passing application messages back and forth to a queued server component. The objects you put into the queue should be serializable.

Or did I misunderstand the question?

The objects you send into the message queue should be serializable.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

nitin_ion5-Jul-05 17:27

5-Jul-05 17:27

You are correct, objects to the queue should be serializable. What i did was i passed a filestream to the bodystream of the queue and it did placed all the content of the file in the queue. But i doubted that it will place the actual file in th equeue.

I am trying to build a messaging system which will send messages as well as objects whcih can include text file, media files etc.

I think that sending messages and sending objects are two different sectors. We cannot use a single system (like MSMQ) to operate for both. Correct me if i am wrong.

If you can suggest me some technologies which i can use for Messaging system.

Dave Kreskowiak6-Jul-05 1:00

6-Jul-05 1:00

You really don't want to be putting the contents of a file in the queue. Since a file's size cannot be predicted with 100% accuracy and assurance (in the case of a corrupted file), you could very easily overwelm the queue.

What you could do, on the other hand, is setup FTP access on the server, upload the file to the server, then send an MSMQ message telling the server where to find it and what it's name is. I've done that before, but that was a long time ago.

Another option is a custom background uploader using BITS (Background Intelligent Transfer). Since BITS will work with a variety of server types, you don't need to use an FTP server. You could use a normal Windows share or upload to a web server with the proper support, like IIS 5 or IIS 6, (XP Servers not supported!) This method will work with Windows 2000 SP3 and above on the client side. Again, then send the MSMW message when the file transfer is complete.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

nitin_ion6-Jul-05 18:27

6-Jul-05 18:27

My need is that i should be watching a particular location on the client machine which i can do it through FileSystemWatcher then without any user interventin it should transfer file from that location to the server.

I have to use a window service for that in which i can use either FTP or Bits or any other.

Can I use web service also?

I think that web service needs to be called through a web page. You cannot call a web service just by connecting to internet?

Correct me if I am wrong.

Dave Kreskowiak7-Jul-05 2:20

7-Jul-05 2:20

In this case, I would probably use BIS to do the transfer. It has a couple of advantages:
1. BITS transfers files in the background so foreground applications don't take a performance hit.
2. If other applications need more network bandwidth, BITS detects this and backs off on its use of the network.
3. If the user shuts down the machine, BITS will pickup the file transfers from where they left off. You don't need a continuous network connection to stay up for the entire file transfer.

I would not recommend using a web service to upload the file for just theses reasons. I would probably still use either FTP or HTTP server to upload the files to. When the transfer is completed (BITS does support notifications like this), then you could probably call a web service on that server to look at the file.

Just make sure you upload the file first, THEN notify the server that its there. What's the point in notifying the server of a file that you haven't uploaded yet?

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

nitin_ion7-Jul-05 17:35

7-Jul-05 17:35

Thanx, I have tried looking for some tutorial on BITS but haven't find which can help me in developing the project. If you can provide me the link of some tutorial which can assist me in application development.

Other thing is does BITS has an authentication mechanisim like FTP.

Dave Kreskowiak8-Jul-05 1:24

8-Jul-05 1:24

MSDN is your friend, here[^].

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

nitin_ion7-Jul-05 20:14

7-Jul-05 20:14

I have read on the Microsoft site that the message storage capacity of MSMQ is 1.6 gb and can be extended upto 3 gb. If this is true then using MSMQ for Distributed env is not suited.

Can you suggest some fail-safe messaging technology just like MSMQ but without the Storage capacity limitation
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnmqqc/html/msmqbest.asp[^][^]

Dave Kreskowiak8-Jul-05 1:27

8-Jul-05 1:27

What on earth do you mean? What can you possibly be sending that's going to take up that much space?

Messaging is for sending application messages, not monsterous libaries of information!

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

nitin_ion8-Jul-05 1:59

8-Jul-05 1:59

I am not sending earth, But earth people would be sending millions of record every day which can vary from few kb's to 3-4 mb's. How much scalable you can make it that is the question?

Dave Kreskowiak8-Jul-05 12:04

8-Jul-05 12:04

Very scalable. And if your going to have that kind of traffic, you would be wise to have multiple MSMQ servers running to handle the load, especially if one goes down for any reason.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

nitin_ion8-Jul-05 18:23

Re: To jonathan15 :control on word save prompt msg

8-Jul-05 18:23

Thanx and we can check in bits the transfer status, it is in the BITS link you provided.

Christian Graus4-Jul-05 19:16

Christian Graus

4-Jul-05 19:16

Why are you posting this across the site ? Why not go back to whereever this person helped you, and respond to them there, so they get an email notification ?

Christian Graus - Microsoft MVP - C++

How to change a file content?

rushing4-Jul-05 17:24

rushing

4-Jul-05 17:24

I want to open a text file and change some content.
For example, find a string 'aaa' and replace it with 'bbb'.
How to locate the 'aaa' and change?
Input,write command do not locate the file pointer.

Re: How to change a file content?

Christian Graus4-Jul-05 17:34

Christian Graus

4-Jul-05 17:34

You can't. Not quite like that. You need to load the entire file, make your changes in memory, then copy the new file over the old one.

Christian Graus - Microsoft MVP - C++

Printing TextBox Text

Anonymous4-Jul-05 10:20

4-Jul-05 10:20

Hi all,

Is there a easy way in .NET to print the contents of a TextBox? Or must you create a PrintDocument?

If a PrintDocument must be used, how do you handle lines that are longer than the page width? Is there a way to find out the maximum number of characters allowed on a line in a PrintDocument?

Any help would be much appreciated. Thanks!

Anonymous4-Jul-05 12:21

http://www.vbdotnetheaven.com/Code/Jun2003/2087.asp[^]

4-Jul-05 12:21

Anonymous5-Jul-05 3:54

5-Jul-05 3:54

Thanks for the link.

I have been there prior to posting here and have tested their sample, but this does not handle word wrap properly.

Any other suggestions?

Anonymous5-Jul-05 15:43

5-Jul-05 15:43

<br />
Dim f as System.IO.StreamWriter = New System.IO.StreamWriter("C:\file.txt")<br />
f.Write(TextBox.Text)<br />
f.Close()<br />
Shell("Notepad.exe /p C:\file.txt", AppWinStyle.NormalFocus)<br />
System.IO.File.Delete("C:\file.txt")<br />

Not the most elegant way, but it works for me.

Anonymous6-Jul-05 4:35

how to do VB6 and serial ports abow COM16

6-Jul-05 4:35

I was actually thinking of doing something like this, Thanks. Smile | :)

But is there some command-line arugment to allow the print dialog to show up? I know that the user may not use their default printer, so a print dialog would be really useful.

Any ideas?

aslm4-Jul-05 9:44

aslm

4-Jul-05 9:44

Im now using mscomm in a VB6 project but as I understand this component does not support ports abow com16. If USB BT, IR and serial dongles is used ports easily starts getting numbers abow 16.

What is the fix or solution to this problem?

If there is no solutions for mscomm suggestions to other components with a word about own experience would be great, comersial or free.

re Me

Re: how to do VB6 and serial ports abow COM16

Dave Kreskowiak4-Jul-05 13:47