Control datatable and row events programatically

I want to turn off events on several tables in a datset, which I know I can do using BeginLoadData. The problem is that I want to raise update events on specific rows after I call EndLoadData.
Specific example: I have a datatable Data, and a datatable Summary. I update rows in the Data table but do not want events raised regarding the changes in Data until I've also updated Summary.

Basically I need transactions, but applied to updates of a dataset. Any ideas I suppose I could lock the individual rows, but then I have to make sure to attempt a lock before accessing a row every time.

.NET Development3

Hi,

One way to do this is to call SetModified for every row that you need to generate the RowUpdated event:

foreach ( DataRow dr in tb.Rows ) {
if ( dr.HasErrors ) {
//row matches some arbitrary criteria
//raise modification event
dr.SetModified();
}
}

If that's not what you need please provide a specific example.

Charles

The problem is that I want all of the "changes" committed to the dataset before raising the event. Example:
Table1 in the dataset holds a list of people, their ages and genders.
Table2 holds summary information about the people in table1. Let's say it's average age for each gender.

I update a person in table1. I want to also update the averages in table2 and then have an event raised for the person row and for the average row(s). I need to make sure that the table has the updated information when the event is called.

For instance, lets say I have code which looks for changes in the people records, and then displays the average age for their age group. If I fire an event as soon as the people row changes, they code won't have access to the new average info. If I change the average first and fire an event, the people data won't match the avergages.

To raise the events there are not taht many options, either you call SetModified and then cancel the 'modification' after, or you create your own events.

Charles

May be, I would try to use triggers (on the database side) or a seperate view or UDF which calculates the column in the database.