Question

Multi-User Query ADO.net

Asked by: Petermcg001

I'm ( slowly) getting to grips with ADO.net.  As I understand it the dataset is disconnected from the database itself.  Therefore can anyone explain what prevents two users accessing the same database to create two datasets and therefore attempting to update the database with incompatible versions of the same record?  

Thanks

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Asked On
2005-01-11 at 03:55:24ID21269669
Topic

Miscellaneous Programming

Participating Experts
3
Points
500
Comments
3

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Answers

 

by: ITBGPosted on 2005-01-11 at 04:04:10ID: 13012518

the database takes care of that with the apropriate locks...

 

by: pillbug22Posted on 2005-01-11 at 12:37:42ID: 13017864

ADO.NET still preserves a connection with the DB (which locks the records in question).

The big difference is that with a local set of data, calculations, queries, sorts, transformations, etc can happen locally which can free up your DB server and network from passing so much data - only the first set was sent across the network.

 

by: ViggeePosted on 2005-01-11 at 23:06:21ID: 13021619

Perform an Optimistic Record Updation

Before updating the record directly, compare the data in the dataset with the database and update them only if they are the same. This can make only one dataset will get updated in to the database.

20120131-EE-VQP-002

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