dimanche 12 juin 2016

Publishing a VB.NET Application with SQL Express DB (using LocalDB)

I have written a VB.Net application that uses an SQL Express DB file containing a single table and a handful of stored procedures. I have successfully built and exported the application to my VPS. The problem comes when knowing what to do concerning the database file, there is a wealth of stuff online but not specifically to suit my needs. I plan to use LocalDB on the VPS but being commandline - it is hard to know if the scripts that I have run have been successful after creating an instance , starting it... etc,

I want to keep installation requirements to an absolute minimum on my VPS machine and (in time other end users machines)... hence using LocalDB and not SQL Express

So, what do I have to do on the VPS to enable my application to connect to the database.. ? This was simple when it was Access - (supply the MDB file and run the AccessDatabaseEngine(redistributable) - job done)

The connection on my devt. machine runs as expected.

The connection string in my code is:

Const strSQLConnection As String = "Data Source=    (localdb)v11.0;Database=SoccerTrader;Trusted_Connection=True"

Can anyone help please.. this is driving me around the bend.. surely it cant be that difficult..?

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I have found the following in an MSDN blog which says:

Database as a File: LocalDB connection strings support AttachDbFileName property that allows attaching a database file during the connection process. This lets developers work directly with databases instead of the database server. Assuming a database file (*.MDF file with the corresponding *.LDF file) is stored at “C:MyDataDatabase1.mdf” the developer can start working with it by simply using the following connection string: “Data Source=(localdb)v11.0;Integrated Security=true;AttachDbFileName=C:MyDataDatabase1.mdf”.

================ ADDED 12th June =====================

OK, this is really bugging me now... I have read around this till it is coming out of my ears and nothing specifically seems to target what I am trying to do. All the blogs I read refer to installing / running SQL Server and changing permissions etc. As I have mentioned I am using a VPS and propose to use LocalDB on the VPS to access a simple/small database file for a VB.Net application I am writing. This is the story so far. 1) I have built a working prototype on my development PC and connected using SQL Express to a database file SoccerTrader.mdf - no problem. In the Visual Studio Project properties I have added a requirement to the project that checks for SQL Server ..and if it is missing, installs it...

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2) I install the project on the VPS and as expected SQL Server 2012 LocalDB is installed .... see here..

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3) I have copied the SoccerTrader.MDF and SoccerTrader.LDF files into "C:BESTBETSoftwareSoccerBot" on the VPS

4) for practical reasons given the problems I am having getting this to work, I have implemented an inputbox for me to specify the connection string when the application runs.... the connection strings I have used give the following...

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1]: http://i.stack.imgur.com/i2tro.png

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So, the question is where do I go from here...? What have I missed.. why is it not working..?

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