Select and Insert Data With Reverse Engineering Via EDM Framework

Vijay Prativadi
11y
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Introduction

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

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

In simple terms "It provides flexibility to pull out the data using a reverse engineering mechanism 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="ReverseEnggApp.WebForm1" %>

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

.grid

{

margin-top: 50px;

}

</style>

</head>

<body>

<div>

<table>

<tr>

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

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

</td>

</tr>

<tr>

<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>

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

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

</asp:GridView>

</td>

</tr>

<tr>

<asp:Label ID="Label3" runat="server" Font-Bold="true" Font-Size="Medium" Font-Names="Verdana"></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 ReverseEnggApp.Models;namespace ReverseEnggApp

{

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

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void Button1_Click(object sender, EventArgs e)

{

var query = (from r in objContext.tblEmployeesselect new

{

EmpId = r.EmpId,FirstName = r.FirstName,LastName = r.LastName,Age = r.Age}).ToList();

GridView1.DataSource = query;

GridView1.DataBind();

}

#region Instance MembersCompanyContext objContext = new CompanyContext();

#endregion

}

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

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

Insert Data with Reverse Engineering via EDM Framework

Introduction

Let's play around with one of the interesting and most useful concepts in EDM Framework.

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

In simple terms "It provides flexibility to insert the data using a reverse engineering mechanism 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="InsertDataReverseEnggApp.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>

<td>

<asp:Label ID="Label1" runat="server" Text="Insert Data with Reverse Engineering via EDM Framework"

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

</td>

</tr>

</table>

<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>

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

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

<br />

</td>

</tr>

</table>

<br />

<table>

<tr>

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

</td>

</tr>

</table>

</center>

</div>

</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 InsertDataReverseEnggApp.Models;namespace InsertDataReverseEnggApp

{

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.Green;

}

else

{

objContext.tblEmployees.Add(new tblEmployee

{

FirstName = TextBox1.Text, LastName = TextBox2.Text, Age = int.Parse(TextBox3.Text) });

objContext.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 MembersCompanyContext objContext = new CompanyContext();

#endregion

}

}

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

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

I hope this article is useful for you.

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