Question

I have, what I thought was a pretty straight-forward query.

In normal Sql this would read:

SELECT    [column names]
FROM      agentscheduledetail
WHERE     (date = '2012-07-04') AND 
           (
            exception = 'Break (No Sign Off)' OR
            exception = 'Break' OR
            exception = 'Break (Signed Out)'
           )

This returns approx 900 records.

However, when I try to enter this into my controller, I end up with around 300,000 records – so I think my AND and ORs are not working. I’ve tried Linqer, but can’t get it to work (I’m aware this may not be actual LINQ but the equivalent query in VS – if there is a linq version… I’d be grateful for that too if possible).

My controller query is:

        var dte = DateTime.Today;

        return View(db.agentscheduledetails.Where
           (
            d => d.date == dte && d.agentName.StartsWith("ta") && 
             (
              d.exception == "Break (No Sign Off)" || 
              d.exception == "Break" || 
              d.exception == "Break (Signed Out)"
             )
            ).ToList()
           );

Can anyone either a) let me know where I’m going wrong with my && || (and/or), or b) is there a way of stepping through the code in VS, to see what the above query translates to in normal SQL so I can try to figure out where I’m going wrong?

Thanks for any help,

Mark

Answer 1

The following is perhaps a simplified version of what you are trying to do, also your LINQ contains an additional statement compared to the SQL where it is comparing the agent name?

var currentDate = DateTime.Today;
var exceptionTypes = new List<string>() { "Break (No Sign Off)", 
                                          "Break", "Break (Signed Out)" };

db.agentscheduledetails.Where(d => d.date == currentDate && 
                                           exceptionTypes.Contains(d.exception));

One thing that you could try is getting hold of a copy of LinqPad, this will let you run your LINQ statement against a database and will show you what the generated SQL statement is.