Question

using linq, I want to check if a row exist on the DB. I just need a true\false return, no data.
I cant use the ExecuteQuery method because I dont have an entity (and I dont even need it)
I thought of doing something like this:

string command = "select * from myTable where X=Y"
var result = db.ExecuteCommand(command);

(db is my DataContext)
and expected the result to contain the number of affected rows. If different that -1 it would mean the record I’m looking for exists. But I always get -1. I imagine the ExecuteCommand method should only be used to tu run Insert, updates or deletes.

How can I run this simple check using linq

Answer 1

If db is your data context, you should just do:

bool rowExists = dc.GetTable<myTable>().Any(row => row.X == row.Y);

In general, with LINQ to SQL (and Entity Framework), you rarely want to write SQL code directly.