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How can I add a feature of grid computing in my software whereby I can provide the computing power of my PC for grid computing. (Chat software - Digsby has done it very nicely) I want to implement a similar feature in my application.
Any ideas How to do it in visual basic
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ssonby wrote: How can I add a feature of grid computing in my software
Let me get this straight. Are you thinking that you can just throw this kind of support into your app by making a few changes to your code, maybe a little rewrite here and there? Correct?
Look into Digipede[^], BOINC[^], as well as others, and do some Googling on the subject first. Your choice of library will be determined by each vendor's product capabilities and your requirements.
...and NO. This NOT something you can just throw into your application at the last minute as an afterthought. This is something your application has to be designed around from day 1.
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Hi,
I have a folder structure where I create two folders under
->Test Scripts
->Test Case (Contains .HTML)
->Test Models (Contians .GML)
I am Using VB6,I am able to see All the folders and files except the .gml files in the UI Form.
When I checked the folder manually the .gml file is present.
Can Anyone help in displaying .gml files in a folder structure of a Form.
Thanks,
Karthick.M
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Without knowing how your code is getting the list of files, it's pretty much impossible to tell you want is going wrong.
I'm just asking this question to help someone else who may help you in using VB6. I'm not one of those people.
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What are the attributes of the .gml files? if they are hidden/system etc. they not be showing up unless you set that as an explicit option of the DIR() function?
As Dave says, post some code you are using to look at the files.
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Hi,
Thanks for your feedback,I got this resolved. I had previously restricted the user to open only .xls,text,html files. Now I added this .gml to this option and it is working fine. 
Thanks,
Karthick.M
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Hi experts,
How do i go about splitting a texbox with lots of information in it to lots of little ones.
Initially what i want to do is perform a sort on a textbox thus having to split the textbox up to perform the sort.
The textboxe is for a high score game so if someone does well they have the option of putting their name and the program will show the high score to everyone at the end.
Is there any easy way to do this then having to split up the textbox, bearing in mind that the names vary from length to length - e.g dan to Patrick....
Many thanks
Dan
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I would presume you would hold all the scores in an array, sorted by value each time a new score is added.
Then show, say the top ten in the immediate text box by just filling in the top ten values from the array.
I would use a Form if you wished to show all scores (or top 1000 or whatever).------------------------------------
I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave
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You really should be more object oriented about all this. In Your backend you should create a User class that exposes 2 properties, Name and High Score. Let your class implement the IComparable interface, and in the CompareTo function just compare the high scores. In your Front End you can create a list of as many users as you think sufficient, call list.Sort(), and use an Object DataSource to bind to a listbox (or Textboxes if you must) displaying the list in order.
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I agree with zimvbcoder, you need a more structured approach. I suggest you create a Player class holding all relevant information; and a List<Player> holding your hall of fame. Then you can sort it; maybe this[^] will interest you.
BTW: I would consider using a ListBox (with OwnerDraw mode) rather than a TextBox.
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Hi Luc, sorry it's off topic a bit, but I just wanted to say thanks for that article. It helped me through some problems I had a while back in implementing the IComparable Interface. Taught me all I know on the topic to be precise. Many Thanks.
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I'm glad you liked it.
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Hello,
I'am developing an App that needs to access a SqlDataBase named "Work", but this may be located in any drive of my system (C:,D:,U:,...). The database structure is always the same, so I use a unique name and only change the files.
When the application start, I use a OpenFileDialog to locate the database and execute an storedprocedure to attach the database to SqlServer (EXEC sp_attach_db @dbname ...).
This works fine, and I can work with the database.
When the user ends to work with database, I want to detach ("EXEC sp_detach_db) this from my App to allow to choose another location one.
At this point I get an error reporting that the database is currently in use, ans so, it can't be detached.
StoredProcedures form attach and detach owns to Master database, so when I execute it I'am not using my database.
Do you know any procedure to disconnect my App from database using system.data, and then I could execute the detach procedure ?
(If I only execute Attach and Detach, without accessing to database, is runs fine).
Here the Detach function:
Public Function DetachDB(ByVal DbName As String) As Boolean
Dim Cmd As New SqlClient.SqlCommand
Dim AffectedRows As Int32
Dim TmpDbName As String = _DbName
_DbName = "Master"
Cmd.Connection = GetConnection
Cmd.CommandText = "EXEC sp_detach_db @dbname = '" & DbName & "'"
Cmd.CommandType = CommandType.Text
Cmd.Connection.Open()
Try
AffectedRows = Cmd.ExecuteNonQuery()
Cmd.Connection.Close()
_DbName = TmpDbName
Return (True)
Catch e As Exception
If PopupErrors Then
MessageBox.Show("[DB]Error separando la base de datos " + e.Message)
End If
Cmd.Connection.Close()
_DbName = TmpDbName
Return False
Exit Function
End Try
End Function
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How does your connection-string look? Do you connect to the "master" database on the server, or to your named database?I are Troll 
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The connection to the app database is:
"Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=work;Data Source=pcjordi2009\sqlexpress"
And when I connect to detach/attach I use:
"Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=Master;Data Source=pcjordi2009\sqlexpress"
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Looks good. Just tried from SQL Management Studio, one can simulate an open connection by simply opening a table in edit-mode.
ALTER DATABASE [AdventureWorks] SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
GO
USE master;
GO
sp_detach_db 'AdventureWorks'; The first command sets the database to single-user mode, effectively disconnecting everyone else I are Troll
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I've tested from Management Studio and it works properly.
From my application, the problem continues.
When I execute ALTER DATABASE... the DB enters in Single User Mode (An icon appears on Db List in Mabagement Studio, but when execute detach it fails reporting that Database is in use 
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edmonson wrote: When I execute ALTER DATABASE... the DB enters in Single User Mode (An icon appears on Db List in Mabagement Studio, but when execute detach it fails reporting that Database is in use
Strange.. Can you post the offending code here?
I've tried it here this way, just to verify that it's actually possible;
string cs = "Server=.\\SQLEXPRESS;Database=master;Trusted_Connection=True;";
using (var con = new SqlConnection(cs))
using (var cmd = new SqlCommand())
{
con.Open();
cmd.Connection = con;
cmd.CommandText = @"ALTER DATABASE [AdventureWorks] SET SINGLE_USER WITH ROLLBACK IMMEDIATE;";
cmd.ExecuteNonQuery();
cmd.CommandText = @"sp_detach_db 'AdventureWorks';";
cmd.ExecuteNonQuery();
}I are Troll
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Sure, this code works and the database is deatached succesful!
but when I execute an attach again:
- Database is attached successful (I can see on Management Studio)
- I open a connection an it opens succesful.
- But when I call an cmd.ExecuteReader to get data, then next error message appears:
"Error at level transport when send the query to the server. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe)"
I've reviewed SQL configuration, and all seems good.
If I restart the App all work succesful.
Any idea, why the server process stopped ??
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edmonson wrote: Any idea, why the server process stopped ??
Alas, no. Is it replicatable?I are Troll
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Sorry, the message was:
Sure, your code works and the database is deatached succesful!
but when I execute an attach again(the same database):
- Database is attached successful (I can see on Management Studio)
- I open a connection an it opens succesful.
- But when I call an cmd.ExecuteReader to get data, then next error message appears:
"Error at level transport when send the query to the server. (provider: Shared Memory Provider, error: 0 - No process is on the other end of the pipe)"
I've reviewed SQL configuration, and all seems good.
If I restart the App all work succesful.
Any idea about it ?
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I don't know; does it happen every time after a reattach?I are Troll 
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Yes, every time I attached again (without exiting from application) and try to get data, the problem appears.
But if I restart application and reattach then works fine !
(Strange behavior )
If I find the solution I'll report it.
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edmonson wrote: Yes, every time I attached again (without exiting from application) and try to get data, the problem appears.
Without exiting from the application; so something gets left behind, in either the application or SQL Server. When the application starts to fetch data, then the application will create a new Connection object, right?
Thinking out loud; the database is re-attached, from within the application. Could it be that we disconnected an active DataReader during the detaching?I are Troll
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