convert IQueryable to

Question

I want to select my price level in database to compare with the an integer number. But It is error : Operator \'==\' cannot be applied to operands of type \'System.Linq.IQue

Answer 1

when you have the result from LinQ expression you will always have the list of result set.

So in your code when you are querying as below :

var list_pricelevel = from c in cm.DataContext.Customers where c.WebAccount == userName select c.PriceLevel;

The list_pricelevel will be in the form of List ie IQueryable list,

so you have to get only one element to check with one element

so use the below code :

if (list_pricelevel.Single() == 3) 
{ 
  Response.Write("Welcome");  
}

or

if (list_pricelevel.First() == 3) 
{ 
  Response.Write("Welcome");  
}


both the above code gives you only one result set value so you can equate with 3 for validation.