如何获得最新记录

Question

I want to get my last record in the table I use this code but it returns nothing

var a = new DataClasses1DataContext();
var student = db.tbl_farmers.OrderByDescending(s => s.id).FirstOrDefault();
dataGridView1.DataSource = student;

Answer 1

Try this

var a = new DataClasses1DataContext();
        var student = db.tbl_farmers.OrderByDescending(s => s.id).Take(1);
        dataGridView1.DataSource = student;ode here

Answer 2

In LINQ we achieve the same thing with the help of OrderByDescending function and Take function.

var qry = db.ObjectCollection
                     .Where(m => m.<field> == data) 
                     .OrderByDescending(m => m.<field>) 
                     .Take(n);