Query Ordering - OrderBy ThenBy OrderByDescending ThenByDescending
suggest changestring[] names= { "mark", "steve", "adam" };
Ascending:
Query Syntax
var sortedNames = from name in names orderby name select name;
Method Syntax
var sortedNames = names.OrderBy(name => name);
sortedNames contains the names in following order: “adam”,“mark”,“steve”
Descending:
Query Syntax
var sortedNames = from name in names orderby name descending select name;
Method Syntax
var sortedNames = names.OrderByDescending(name => name);
sortedNames contains the names in following order: “steve”,“mark”,“adam”
Order by several fields
Person[] people = { new Person { FirstName = "Steve", LastName = "Collins", Age = 30}, new Person { FirstName = "Phil" , LastName = "Collins", Age = 28}, new Person { FirstName = "Adam" , LastName = "Ackerman", Age = 29}, new Person { FirstName = "Adam" , LastName = "Ackerman", Age = 15} };
Query Syntax
var sortedPeople = from person in people orderby person.LastName, person.FirstName, person.Age descending select person;
Method Syntax
sortedPeople = people.OrderBy(person => person.LastName) .ThenBy(person => person.FirstName) .ThenByDescending(person => person.Age);
Result
1. Adam Ackerman 29 2. Adam Ackerman 15 3. Phil Collins 28 4. Steve Collins 30
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