Introduction

This article shows how to insert data using the Code First approach.

Create an ASP.Net web application as in the following:

Employee.cs

  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Web;
  5. using System.ComponentModel.DataAnnotations;
  6. using System.ComponentModel.DataAnnotations.Schema;
  8. namespace Insert_Data___Code_Frist_Approach
  9. {
  10. public class Employee
  11. {
  13. public Employee()
  14. {
  15. }
  17. [Key]
  18. [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
  19. public int Id { get; set; }
  20. public string FirstName { get; set; }
  21. public string LastName { get; set; }
  22. public int Age { get; set; }
  23. }
  24. }
Employeecontext.cs
  1. using System;
  2. using System.Collections.Generic;
  3. using System.Data.Entity;
  4. using System.Linq;
  5. using System.Web;
  7. namespace Insert_Data___Code_Frist_Approach
  8. {
  9. public class EmployeeContext : DbContext
  10. {
  11. public EmployeeContext()
  12. : base("EmployeeConn")
  13. {
  14. Database.SetInitializer<EmployeeContext>(new CreateDatabaseIfNotExists<EmployeeContext>());
  15. }
  17. public DbSet<Employee> Employees { get; set; }
  18. }
  19. }
Web.config
  1. <connectionStrings>
  2. <add name="EmployeeConn"
  3. connectionString="Data Source=WIN-B4KJ8JI75VF;Initial Catalog=EmployeeDB;Integrated Security=true"
  4. providerName="System.Data.SqlClient"/>
  5. </connectionStrings>
Webform1.aspx
  1. <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="Insert_Data___Code_Frist_Approach.WebForm1" %>
  3. <!DOCTYPE html>
  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>
  13. <table>
  14. <tr>
  15. <td>
  16. <asp:Label ID="Label1" runat="server" Text="Insert Data - EF Code First Approach" Font-Bold="true"></asp:Label>
  17. </td>
  18. </tr>
  19. </table>
  20. <br />
  21. <br />
  22. <table>
  23. <tr>
  24. <td>
  25. <asp:Label ID="Label2" runat="server" Text="Please Enter FirstName: " ForeColor="Brown"
  26. Font-Bold="true" Font-Italic="true"></asp:Label>
  27. </td>
  28. <td>
  29. <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
  30. </td>
  31. </tr>
  32. <tr>
  33. <td>
  34. <asp:Label ID="Label3" runat="server" Text="Please Enter LastName: " ForeColor="Brown"
  35. Font-Bold="true" Font-Italic="true"></asp:Label>
  36. </td>
  37. <td>
  38. <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
  39. </td>
  40. </tr>
  41. <tr>
  42. <td>
  43. <asp:Label ID="Label4" runat="server" Text="Please Enter Age: " ForeColor="Brown"
  44. Font-Bold="true" Font-Italic="true"></asp:Label>
  45. </td>
  46. <td>
  47. <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
  48. </td>
  49. </tr>
  50. <tr>
  51. <td colspan="2">
  52. <asp:Button ID="Button1" runat="server" Text="Insert Data"
  53. BackColor="Orange" Font-Bold="true" OnClick="Button1_Click" />
  54. <br />
  55. <br />
  56. </td>
  57. </tr>
  58. </table>
  59. <br />
  60. <br />
  61. <table>
  62. <tr>
  63. <td colspan="3">
  64. <asp:Label ID="Label5" runat="server" ForeColor="Red" Font-Bold="true"></asp:Label>
  65. </td>
  66. </tr>
  67. </table>
  69. </div>
  70. </form>
  71. </body>
  72. </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;
  8. namespace Insert_Data___Code_Frist_Approach
  9. {
  10. public partial class WebForm1 : System.Web.UI.Page
  11. {
  12. protected void Page_Load(object sender, EventArgs e)
  13. {
  15. }
  17. protected void Button1_Click(object sender, EventArgs e)
  18. {
  19. Label5.Text = String.Empty;
  20. EmployeeContext empContext = new EmployeeContext();
  21. Employee emp = new Employee() { FirstName = TextBox1.Text, LastName = TextBox2.Text, Age = int.Parse(TextBox3.Text) };
  22. empContext.Employees.Add(emp);
  23. empContext.SaveChanges();
  24. Label5.Text = "Data Inserted Successfully";
  26. }
  27. }
  28. }
The output of the application looks as in the following.

Summary

In this article, we saw how to insert data using the Code First approach. Happy coding!