Get data using LINQ and show result in a gridview

Question

How can I get all modules from the array like below where student firstName, using Linq in C# and Asp.net. It\'s something probably easy to do but have failed to get the trick.

Answer 1

you are missing ToList at the end of your query.

yourGridView.DataSource = (from Student s in arrList
                    where s.FirstName == "Cesar"
                    select s).ToList();

then bind it to your gridview.

Answer 2

You should avoid ArrayLists. Use List instead.

List<Student> StudentList = new List<Student>(); /* ... */

And you query should look like:

var query = from student in StudentList
            where student.FirstName == "Cesar"
            select  student;

Then bind your Grid:

 GridView1.DataSource = query.ToList();
 GridView1.DataBind();

Answer 3

Consider using a List<Student> instead:

List<Student> list = new List<Student>();  
    list.Add(
       // ... Just like in your OP
     });

Then get the result:

var result = from student in list
             where student.FirstName == "Cesar"
             select  student;

You should then be able to add the result to your datasource using ToList() on the returned IEnumerable:

 gridView.DataSource = result.ToList();