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| Submitted on: 8/4/2002 8:44:52 AM
By: Hilton Giesenow
Level: Intermediate
User Rating:
By 2 Users
Compatibility:C#, VB.NET, ASP.NET, C++.NET
Users have accessed this code 6666 times.
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| | | VB.NET Class Generator From Databases - In order to simplify the interaction with a database and decrease development time, many systems contain classes that represent database objects. For example, one could create a "Customer" class with "Name" and "Email" properties and "Update" and "Delete" methods. These actions and properties would be interacting with the database in the background, thus abstracting the user from the lower-level DB details.
I have written a web service that receives an XML dataset as a parameter, and returns a string array representing the automatically generated classes and collections to achieve what is described above. This web service can be called from any application in virtually any language. The code provided here is one implementation written in VB.NET that takes a SQL Server connection string, builds the database structure in a dataset, and writes out the files to a supplied path.
Restrictions:
The current restrictions for this app are that the table can have only 1 primary key field, and this key field must be numeric. Also, the app automatically attempts to connect to certain stored procedures. The names of these stored procedures are taken from the table name. These names are (for e.g. with a table called tblCustomer)
To view all records : spCustomersView
To view 1 record : spCustomerView
To add a record : spCustomerAdd
To edit a record : spCustomerEdit
To delete a record : spCustomerDelete
To change the names of these Stored Procs, just locate them in the .vb text and change them.
to not use Stored procs, change the s.p. name to SQL text, and change the StoredProcedure value of the database command / DataAdapter to CommandText.
Also, a note on names. The app requires each table to have an initial capital letter. This is because I use naming conventions for my tables. Normal tables have a prefix of "tbl". Linking tables are prefixed "tlnk", and lookup tables (for genders, for example) are prefixed "tlk". For example, a customer table would be called tblCustomer. However, Customer would work ok too.
This app forms part of an Honours course. As such, I would greatly appreciate feedback. You can contact me at shirna@mweb.co.za. Let me know any suggestions / comments, or at least briefly what you are using the app for.
The service itself is at http://137.158.189.182/TempusFugit/wsclassgenerator.asmx
Thanks,
Hilton
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See Voting Log | | | | Other User Comments | 10/2/2002 4:25:56 PM:
Where is the web service code. You
would have to be on glue to think that
I would give you the keys to my
database. You shouldn't have wasted my
time with this submission if you were
not willing to release the source code
for the service. Tell ya what. Send me
your connection string to your database
and lets see how much fun I can have
with your databases.
| 10/2/2002 7:59:21 PM:Hilton Giesenow
The connection string is to insert into
the code for your convenience. If you
don't want this, enter a blank value,
and then change it in the files
generated. Also, please take the time
to figure out what a Web Service is
before asking for the code?!??!? you
might try visiting my site, or else the
microsoft, sun, ibm, oracle, delphi,
BEA, cape clear etc. etc. etc. websites.
| 11/6/2002 7:16:03 PM:Enterprize VB SQL programer
I tried running your webservice,
however your connection is not up and
running. I would not mind seeing your
project working.
| 3/18/2003 2:35:51 PM:
This is bogus. If you are going to post
code post it all or dont waste peoples
time promoting your commercial code.
| 10/24/2003 3:00:42 PM:Keir Gordon
I concur with all the other posts. I
am aware webservices are supposed to be
a shared web function... but that idea
has not come into fruition yet and we
developers need the code. Also you
can't expect people to give you access
to their database. We are impressed by
your code idea, but give us source!
Thats the idea behind
planet-source-code.
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