Is it possible to use a string for a LINQ query expression?

Question

I need to extract some records if some variables have some values.

For example, if status>0 I need to filter result like :

where object.id=status

else, if status=0, I need to remove this where clauses and return all elements. I'll get rid about :

if(status>0)
   do a linq query with the where clauses
else
   do a link query with that where clauses

too much code, because the variables to check could be more than 4-5.

Is it possible to "inject" a sort of string on LINQ? (So i can create my string and pass it to the LINQ).

I mean somethings like :

string myQuery="";
if(status>0)
   myQuery="where object.id=status";
else
   myQuery="";

is it possible? (Classic mysql behaviour).

Answer 1

Since LINQ is lazy, you can just do

var query = ...

if (status > 0)
{
    query = query.Where(o => o.id == status);
}