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| Submitted on: |
8/4/2002 8:44:52 AM |
| By: |
Hilton Giesenow
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| Level: |
Intermediate |
| User Rating: |
By 5 Users |
| Compatibility: |
C#, VB.NET, ASP.NET, C++.NET |
| Views: |
26903 |
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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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By using this code, you agree to the following terms...
- You may use
this code in your own programs (and may compile it into a program and distribute it in compiled format for languages that allow it) freely and with no charge.
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Your Vote
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Other User Comments
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 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.
(If this comment was disrespectful, please report it.)
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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.
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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.
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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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12/13/2005 6:01:24 PM: Rick Toner
Wow... I try to use this and find the web-service is not even running. How finally letting us have the real code... I would love to make something that does my own formats.
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3/12/2006 10:55:48 AM: thatsparesh
You could have generated a dll if at all you wished to hide your code rather than keeping it as on webservice.. atleast we could have taken SOME advantage of your code.. !!
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12/14/2006 7:05:29 AM: Naqushbandi
fine nice
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6/19/2007 12:00:29 PM: Jim Miņano
try the Schema for multiple key
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