Update Data With Reverse Engineering Via EDM Framework

Introduction

 

Today, in this article let's play around with one of the interesting and most useful concepts in EDM Framework.

 

Question: What is update data with reverse engineering via EDM framework?

 

In simple terms "It provides flexibility to update the data using reverse engineering via EDM framework".

 

Step 1: Create a new web application
 

Output1.jpg

Step 2: Set up a new EDM framework with reverse engineering for the project
 

Output2.jpg

Step 3: The complete code of WebForm1.aspx looks like this:

 

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

                        <asp:Label ID="Label1" runat="server" Text="Update Data with Reverse Engg. via EDM Framework"

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

                    </td>

                </tr>

                <tr>

                    <td>

                        <asp:Label ID="Label6" runat="server" Text="Please Enter Employee Id" Font-Size="Large"

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

                    </td>

                    <td>

                        <asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>

                    </td>

                </tr>

                <tr>

                    <td>

                        <asp:Label ID="Label2" runat="server" Text="Please Enter FirstName" Font-Size="Large"

                            Font-Names="Verdana" 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" Font-Size="Large"

                            Font-Names="Verdana" 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" Font-Size="Large" Font-Names="Verdana"

                            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="Button2" runat="server" Text="Update Data" Font-Names="Verdana" Width="166px"

                            BackColor="Orange" Font-Bold="True" OnClick="Button2_Click" />

                    </td>

                </tr>

                <tr>

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

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

                    </td>

                </tr>

            </table>

        </div>

    </center>

    </form>

</body>

</html>
 

Step 4: The complete code of WebForm1.aspx.cs looks like this:

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using UpdateDataReverseEnggApp.Models;

namespace UpdateDataReverseEnggApp

{

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

    {

        protected void Page_Load(object sender, EventArgs e)

        {

        }

        protected void Button2_Click(object sender, EventArgs e)

        {

            if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text) || string.IsNullOrEmpty(TextBox3.Text) || string.IsNullOrEmpty(TextBox4.Text))

            {

                Label5.Text = "Please Enter Some Values";

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

            }

            else

            {

                tblEmployee employeeQuery;

                using (var dbContext = new CompanyContext())

                {

                    int empId = Convert.ToInt32(TextBox4.Text);

                    employeeQuery = (from r in dbContext.tblEmployees where r.EmpId == empId select r).Single();

                }

                employeeQuery.FirstName = TextBox1.Text;

                employeeQuery.LastName = TextBox2.Text;

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

                updateEmployee(employeeQuery);

                Label5.Text = "Data Updated Successfully";

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

                TextBox1.Text = string.Empty;

                TextBox2.Text = string.Empty;

                TextBox3.Text = string.Empty;

                TextBox4.Text = string.Empty;

            }

        }

        private void updateEmployee(tblEmployee tblEmployee)

        {

            using (var objContext = new CompanyContext())

            {

                objContext.Entry(tblEmployee).State = System.Data.EntityState.Modified;

                objContext.SaveChanges();

            }

        }

    }

}
 

Step 5: The output of the application looks like this:


 

Output3.png
 


 

 

Step 6: The updated data output of the application looks like this:


 

  Output4.png


 

I hope this article was useful for you.