Question

I want to use Where method in Linq 2 entities that will be equal to this

userRepository.Users.Where(u=>u.RoleID == 1 || u=>u.RoldID == 2).Select(o => new SelectListItem { Text = o.Role.RoleName, Value = o.RoleID.ToString() }).ToList();

The problem of course is in Where(u=>u.RoleID == 1 || u=>u.RoldID == 2)

The problem is that I don’t know how to use WHERE method with OR inside the WHERE clause.

any ideas (the code above will not compile of-course b/c of the lambda expression.

userRepository.Users returns an list of Users entities.

I guess that and can be done using concatenation of .Where().Where() but I need an OR.

Answer 1

Just remove the extra u=>

Where(u => u.RoleID == 1 || u.RoleID == 2).

In your code, you try to “or” the lambdas, “lambda1 OR lambda2”, this is not possible as you’ve noticed.
You can however “or” the expression inside the lambda:

lambda(expression1 OR expression2)

Read the code as:

(User user)
{
return user.RoleId == 1 || user.RoleId == 2;
}

If that makes things clearer..

Also, I guess you have a typo on the last part “u.RoldId == 2”, instead of RoleId..