Question

I’m new to c#, linq, and EF4, so please bear with me. I’m sure it’s something really simple, but not seeing it.

The stored procedure I’m replacing does a SELECT INTO to query a bunch of data, do some simple transformations, and then output the results into another table. Then, this set of data is returned for local processing in the code.

I have a query that pulls my data into an anonymous type and handles all of the transformations. But, how do I go about sending that data up into the results table?

Initially, I thought of using the entity type to store my initial results. But I have extra fields that I need for local processing that will not be stored in the result table.

Thanks to any EF masters who care to take a crack at this for me!

edit: Here’s some pseudo code based on Morteza’s help, but doesn’t seem to move the data —

var ctx = new ReportEntities();
var query = from s in ctx.Source
            select new
            {
                s.SourceID,
                s.OtherStuff
            };

query.ToList().Select(q => new Report()
{
    SourceID = q.SourceID,
    OtherStuff = q.OtherStuff
});

ctx.SaveChanges();

Answer 1

As of EF4 you can update your model with your individual stored procedures and import them as functions. I think the easiest way would be to take advantage of this new feature and create a second procedure that accepts the result data as parameters and save them into the result table. So you can call this function once you done with your data processing.

Update:

var ctx = new ReportEntities();
var query = (from s in ctx.Source select new {
        s.SourceID,
        s.OtherStuff}).ToList();

List<Report> reports = query.Select(q => new Report() 
{
    SourceID = q.SourceID,
    OtherStuff = q.OtherStuff
}).ToList();

// Now you need to add your new report objects to the Context:
foreach(report in reports) {
    ctx.Reports.AddObject(report);
}

// Now is the time to call the SaveChanges on ObjectContext:
ctx.SaveChanges();