Execute a block of database querys
- by Nightmare
I have the following task to complete:
In my program a have a block of database querys or questions.
I want to execute these questions and wait for the result of all questions or catch an error if one question fails!
My Question object looks like this (simplified):
public class DbQuestion(String sql)
{
[...]
}
[...]
//The answer is just a holder for custom data...
public void SetAnswer(DbAnswer answer)
{
//Store the answer in the question and fire a event to the listeners
this.OnAnswered(EventArgs.Empty);
}
[...]
public void SetError()
{
//Signal an Error in this query!
this.OnError(EventArgs.Empty);
}
So every question fired to the database has a listener that waits for the parsed result.
Now I want to fire some questions asynchronous to the database (max. 5 or so) and fire an event with the data from all questions or an error if only one question throws one!
Which is the best or a good way to accomplish this task?
Can I really execute more then one question parallel and stop all my work when one question throws an error?
I think I need some inspiration on this...
Just a note: I´m working with .NET framework 2.0
