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

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

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">

</head>

<body>

<div>

<table>

<tr>

<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>

<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>

<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:

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

I hope this article was useful for you.