Question

It is not very clear to me why I am not able to get the number of rows returned using linq-to-sql

I had this query to use as validation:

var obj1 = (from c in context.sistema_DocType_Index
where c.indexId == id
select c).First();

if(obj1 != null) {}

I was getting a null exception using First() method if there was no row returned. Ok, so I decided to use Count().

var obj1 = (from c in context.sistema_DocType_Index
where c.indexId == id
select c).Count();

if(obj1  > 0) {}

I have 3 rows returning from the database but the Count() gives me 0.
Why is that?

Answer 1

you can use Any();method. which is the best use for this case. Any()

if( YourDataCollection.Any(SomeCOndtion==SOmeValue))
 { 
 //  do some logic
 }