linq to entities Method-Based Query Syntax

I'm practicing writing LINQ to Entities queries.

I have a ASP.NET web forms application.
I created an Entity Data Model using database First approach for the Northwind Sql Server Database.

On my .aspx page I have a GridView and I'm binding that to my Employees entity.

I read the info on this link:
Queries in LINQ to Entities
http://msdn.microsoft.com/en-us/library/vstudio/bb399367%28v=vs.100%29.aspx

On that link it says, when using LINQ to Entities, there are 2 ways to write a query. One way is to use Query Expression syntax and the other is using Method-Based Query Syntax with lambda expressions.


Query Expression Syntax Example:

I created an example that looks like this and it works just fine.
This example uses Query Expression Syntax
My code looks like this:


EmployeeGrid.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="EmployeeGrid.aspx.cs" Inherits="SampleApp.EmployeeGrid" %>
 
<!DOCTYPE html>
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
        <asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
    
    </div>
    </form>
</body>
</html>

Open in new window


EmployeeGrid.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
// reference project
using SampleApp;
 
namespace SampleApp
{
    public partial class EmployeeGrid : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            // using Linq to Entities Query Expression Syntax

            using (NorthwindEntities myEntities = new NorthwindEntities())
            {
                var authorizedEmployees = from employee in myEntities.Employees
                                          //where employee.EmployeeID == 1
                                          orderby employee.EmployeeID ascending                                                                                select new { employee.EmployeeID, employee.FirstName, employee.LastName, employee.Title };
                
                // We canot bind Iqueryable directly. We have to change into ToList()
                GridView1.DataSource = authorizedEmployees.ToList();
 
                GridView1.DataBind();
            }
 
        }
    }

Open in new window


Now I'm trying  to do the same example but re-write the linq query in EmployeeGrid.aspx.cs using Method-Based Query Syntax with lambda expressions.

What is the equivalent Method-Based Query Syntax with lambda expression for this snippet?? can anyone help?

            using (NorthwindEntities myEntities = new NorthwindEntities())
            {
                var authorizedEmployees = from employee in myEntities.Employees
                                          //where employee.EmployeeID == 1
                                          orderby employee.EmployeeID ascending                                                                                select new { employee.EmployeeID, employee.FirstName, employee.LastName, employee.Title };
                
                // We canot bind Iqueryable directly. We have to change into ToList()
                GridView1.DataSource = authorizedEmployees.ToList();
 
                GridView1.DataBind();
            }

Open in new window


           
Method-Based Query Syntax with lambda expressions
LVL 1
maqskywalkerAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

it_saigeDeveloperCommented:
Like this:
            using (NorthwindEntities myEntities = new NorthwindEntities())
            {
                var authorizedEmployees = myEntities.Employees.OrderBy(emp => emp.EmployeeID).Select(emp => new { EmployeeID = emp.EmployeeID, FirstName = emp.FirstName, LastName = emp.LastName, Title = emp.Title }).ToList();
                
                // We canot bind Iqueryable directly. We have to change into ToList()
                GridView1.DataSource = authorizedEmployees;
 
                GridView1.DataBind();
            }

Open in new window


-saige-
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
C#

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.