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Insert and Select Data in Reverse Engineering POCO Generator

Insert Data - Reverse Engineering POCO Generator

 

Introduction

 

This article demonstrates an interesting and very useful concept in Entity Framework.

Question: What is reverse engineering POCO generator?

 

In simple terms "It is a template that enables generation of entity classes by reverse engineering with the POCO generator".

Step 1: Create a new web application

 

new-project.png

 

Step 2: Adding a new Entity Framework reverse engineering POCO generator:

 

add-new-items.png

 

entityframework.png

 

Step 3: The complete code of WebForm1.aspx is as in the following:
 

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="InsertDataReverseEnggPOCOGenerator.WebForm1" %>

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <center>

        <table>

            <tr>

                <td>

                    <asp:Label ID="Label1" runat="server" Text="Reverse Engg. POCO Generator - Insert Data"

                        Font-Bold="true"></asp:Label>

                </td>

            </tr>

        </table>

        <br />

        <br />

        <table>

            <tr>

                <td>

                    <asp:Label ID="Label2" runat="server" Text="Please Enter FirstName: " ForeColor="Brown"

                        Font-Bold="true" Font-Italic="true"></asp:Label>

                </td>

                <td>

                    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

                </td>

            </tr>

            <tr>

                <td>

                    <asp:Label ID="Label3" runat="server" Text="Please Enter LastName: " ForeColor="Brown"

                        Font-Bold="true" Font-Italic="true"></asp:Label>

                </td>

                <td>

                    <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

                </td>

            </tr>

            <tr>

                <td>

                    <asp:Label ID="Label4" runat="server" Text="Please Enter Age: " ForeColor="Brown"

                        Font-Bold="true" Font-Italic="true"></asp:Label>

                </td>

                <td>

                    <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>

                </td>

            </tr>

            <tr>

                <td colspan="2" align="center">

                    <asp:Button ID="Button1" runat="server" Text="Insert Data" OnClick="Button1_Click"

                        BackColor="Orange" Font-Bold="true" /><br />

                    <br />

                </td>

            </tr>

        </table>

        <br />

        <br />

        <table>

            <tr>

                <td colspan="3">

                    <asp:Label ID="Label5" runat="server" Font-Bold="true"></asp:Label>

                </td>

            </tr>

        </table>

    </center>

    </form>

</body>

</html>


Step 4: The complete code of WebForm1.aspx.cs is as in the following:

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace InsertDataReverseEnggPOCOGenerator

{

    public partial class WebForm1 : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e)

    {

    }

        protected void Button1_Click(object sender, EventArgs e)

        {

            if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text) || string.IsNullOrEmpty(TextBox3.Text))

            {

                Label5.Text = "Please Enter Some Values";

                Label5.ForeColor = System.Drawing.Color.Red;

            }

            else

            {

                objEmployee.FirstName = TextBox1.Text;

                objEmployee.LastName = TextBox2.Text;

                objEmployee.Age = int.Parse(TextBox3.Text);

                objEntities.TblEmployee.Add(objEmployee);

                objEntities.SaveChanges();

                Label5.Text = "Data Inserted Successfully";

                Label5.ForeColor = System.Drawing.Color.Green;

                TextBox1.Text = string.Empty;

                TextBox2.Text = string.Empty;

                TextBox3.Text = string.Empty;

            }

        }

        #region Instance MembersMyDbContext objEntities = new MyDbContext();

        TblEmployee objEmployee = new TblEmployee();

        #endregion

    }

}

 

Step 5: The complete code of web.config is as in the following:
 

<?xml version="1.0" encoding="utf-8"?>

<!--For more information on how to configure your ASP.NET application, please visithttp://go.microsoft.com/fwlink/?LinkId=169433-->

<configuration>

  <configSections>

    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->

    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />

  </configSections>

  <connectionStrings>

    <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient" />

    <add name="MyDbContext" connectionString="Data Source=WIN-KV3BO1RQQF7;Initial Catalog=Company;Integrated Security=True;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" />

  </connectionStrings>

  <system.web>

    <compilation debug="true" targetFramework="4.0" />

    <authentication mode="Forms">

      <forms loginUrl="~/Account/Login.aspx" timeout="2880" />

    </authentication>

    <membership>

      <providers>

        <clear />

        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />

      </providers>

    </membership>

    <profile>

      <providers>

        <clear />

        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />

      </providers>

    </profile>

    <roleManager enabled="false">

      <providers>

        <clear />

        <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />

        <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />

      </providers>

    </roleManager>

  </system.web>

  <system.webServer>

    <modules runAllManagedModulesForAllRequests="true" />

  </system.webServer>

  <entityFramework>

    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />

  </entityFramework>

</configuration>

  

Step 6: The output of the application is as in the following:

 

insert-data.png

 

Step 7: The inserted data output of the application is as in the following:

 

insert-data-successfully.png

 

Select Data - Reverse Engineering POCO Generator

 

Question: What is reverse engineering POCO generator?

 

In simple terms "It is a template that enables generation of entity classes by reverse engineering with the POCO generator".

Step 1: Create a new web application

 

new-project1.png

 

Step 2: Adding a new Entity Framework reverse engineering POCO generator:

 

add-new-items1.png

 

entity-framework1.png

 

Step 3: The complete code of WebForm1.aspx is as in the following:
 

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="SelectDataReverseEnggPOCOTemplate.WebForm1" %>

 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

    <title></title>

</head>

<body>

    <form id="form1" runat="server">

    <center>

        <div>

            <table>

                <tr>

                    <td colspan="2" align="center">

                        <asp:Label ID="Label1" runat="server" Text="Select Data - Reverse POCO Generator"

                            Font-Bold="true" Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>

                    </td>

                </tr>

                <tr>

                    <td colspan="2" align="center">

                        <asp:Button ID="Button1" runat="server" Text="Select Data" Font-Names="Verdana" Width="213px"

                            BackColor="Orange" Font-Bold="True" OnClick="Button1_Click" />

                    </td>

                </tr>

                <tr>

                    <td colspan="2" align="center">

                        <asp:GridView ID="GridView1" runat="server" CssClass="grid" BackColor="LightGoldenrodYellow"

                            BorderColor="Tan" BorderWidth="1px" CellPadding="2" ForeColor="Black" GridLines="None">

                            <AlternatingRowStyle BackColor="PaleGoldenrod" />

                            <FooterStyle BackColor="Tan" />

                            <HeaderStyle BackColor="Tan" Font-Bold="True" />

                            <PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />

                            <SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />

                            <SortedAscendingCellStyle BackColor="#FAFAE7" />

                            <SortedAscendingHeaderStyle BackColor="#DAC09E" />

                            <SortedDescendingCellStyle BackColor="#E1DB9C" />

                            <SortedDescendingHeaderStyle BackColor="#C2A47B" />

                            <EmptyDataTemplate>

                                No Records Found!</EmptyDataTemplate>

                        </asp:GridView>

                    </td>

                </tr>

            </table>

        </div>

    </center>

    </form>

</body>

</html>

 

Step 4: The complete code of WebForm1.aspx.cs is as in the following:


 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace SelectDataReverseEnggPOCOTemplate

{

    public partial class WebForm1 : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

        }

        protected void Button1_Click(object sender, EventArgs e)

        {

            using (MyDbContext objEntities = new MyDbContext())

            {

                GridView1.DataSource = objEntities.TblEmployee.ToList();

                GridView1.DataBind();

            }

        }

    }

}
 

Step 5: The complete code of web.config is as in the following:


 

 

<?xml version="1.0" encoding="utf-8"?>

<!--For more information on how to configure your ASP.NET application, please visithttp://go.microsoft.com/fwlink/?LinkId=169433-->

<configuration>

  <configSections>

    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->

    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />

  </configSections>

  <connectionStrings>

    <add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient" />

    <add name="MyDbContext" connectionString="Data Source=WIN-KV3BO1RQQF7;Initial Catalog=Company;Integrated Security=True;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" />

  </connectionStrings>

  <system.web>

    <compilation debug="true" targetFramework="4.0" />

    <authentication mode="Forms">

      <forms loginUrl="~/Account/Login.aspx" timeout="2880" />

    </authentication>

    <membership>

      <providers>

        <clear />

        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />

      </providers>

    </membership>

    <profile>

      <providers>

        <clear />

        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />

      </providers>

    </profile>

    <roleManager enabled="false">

      <providers>

        <clear />

        <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />

        <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />

      </providers>

    </roleManager>

  </system.web>

  <system.webServer>

    <modules runAllManagedModulesForAllRequests="true" />

  </system.webServer>

  <entityFramework>

    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />

  </entityFramework>

</configuration>
 

Step 6: The output of the application is as in the following:

 

select-data.png

 

Step 7: The selected data output of the application is as in the following:

 

display-data.png

 

I hope this article was useful for you.


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