LINQ Method Syntax C# Example
Now we learn LINQ method syntax (some people call as fluent syntax)
Method syntax is combination of extension methods and Lambda expression
First we create a student list object with some data, so we can use that for all examples in this tutorials
var studentsStream = new List<Student> {
new Student { FullName = "Aruna", StreamId=1, Score = 10 },
new Student { FullName = "Janet", StreamId=2, Score = 9 },
new Student { FullName = "Ajay", StreamId=1, Score = 11 },
new Student { FullName = "Kunal", StreamId=2, Score = 13 },
new Student { FullName = "Chandra", StreamId=2, Score = 8 },
};
Example 1: from above student list we want to select only student names
LINQ Method syntax with lambda select one column
//Method syntax var _studentNames1 = studentsStream.Select(s => s.FullName);
Example 2: from above student list select students where score is more than 10
LINQ method syntax using extension method (where ) and lambda in list
Here you can notice how query syntax is difference than method syntax.
// Way 1 (Query syntax) var studentList = from stu in studentsStream where stu.Score>10 select stu; // Way 2: Using Lambda Expression var studentList1 = studentsStream.Where<Student>(stu => stu.Score> 10);
Now if you check the Where extension method, you will see that Where method accepts a predicate as Func.
public static IEnumerable<TSource> Where<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate)
Most of the time while writing linq code, we use both method syntax and query syntax together.
