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How do you loop through IQueryable and remove some elements I don't need.
I am looking for something like this
var items = MyDataContext.Items.Where(x => x.Container.ID == myContainerId);
foreach(Item item in items)
{
if(IsNotWhatINeed(item))
items.Remove(item);
}
Is it possible? Thanks in advance
478
The major difference between IQueryable and IEnumerable is that IQueryable executes query with filters whereas IEnumerable executes the query first and then it filters the data based on conditions.
The IQueryable interface inherits the IEnumerable interface so that if it represents a query, the results of that query can be enumerated. Enumeration causes the expression tree associated with an IQueryable object to be executed.
In LINQ to query data from database and collections, we use IEnumerable and IQueryable for data manipulation. IEnumerable is inherited by IQueryable, Hence IQueryable has all the features of IEnumerable and except this, it has its own features. Both have its own importance to query data and data manipulation.
The Iterable interface was introduced in JDK 1.5. It belongs to java. lang package. In general, an object Implementing Iterable allows it to be iterated. An iterable interface allows an object to be the target of enhanced for loop(for-each loop).
You should be able to query that further as in this
var filtered = items.Where(itm => IsWhatINeed(itm));
Also notice the subtle change in the boolean function to an affirmative rather than a negative. That (the negative) is what the not operator is for.
68
items = items.Where( x => !IsNotWhatINeed(x) );
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