LINQ

Inner Join using Linq to SQL

Introduction

In this blog we will see how to perform inner join using linq to sql.

Step 1: Create asp.net web application

Webform1.aspx

  1. <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="InnerJoin_LINQtoSQL.WebForm1" %>  
  2.   
  3. <!DOCTYPE html>  
  4.   
  5. <html xmlns="http://www.w3.org/1999/xhtml">  
  6. <head runat="server">  
  7.     <title></title>  
  8. </head>  
  9. <body>  
  10.     <form id="form1" runat="server">  
  11.     <div>  
  12.         <asp:GridView ID="GridView1" runat="server"></asp:GridView>  
  13.     </div>  
  14.     </form>  
  15. </body>  
  16. </html>
Webform1.aspx.cs
  1. using System;  
  2. using System.Collections.Generic;  
  3. using System.Linq;  
  4. using System.Web;  
  5. using System.Web.UI;  
  6. using System.Web.UI.WebControls;  
  7.   
  8. namespace InnerJoin_LINQtoSQL  
  9. {  
  10.     public partial class WebForm1 : System.Web.UI.Page  
  11.     {  
  12.         DataClasses1DataContext objContext = new DataClasses1DataContext();  
  13.         protected void Page_Load(object sender, EventArgs e)  
  14.         {  
  15.             var query = from r in objContext.Employees  
  16.                         join s in objContext.Departments  
  17.                         on r.DeptId equals s.DeptId  
  18.                         select new  
  19.                         {  
  20.                              FirstName = r.FirstName  
  21.                             ,LastName = r.LastName  
  22.                             ,Department = s.DeptName  
  23.                         };  
  24.   
  25.             GridView1.DataSource = query;  
  26.             GridView1.DataBind();  
  27.         }  
  28.     }  
  29. }  

Output of the application looks like this

Summary

In this blog we have seen how we can perform inner join using linq to sql.

Happy coding.
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