Select Data with Raw SQL Query via EDF Framework

Introduction

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

Question: What is select data with raw sql query via EDM framework?

In simple terms "It provides flexibility to pull off data with help of raw sql queries via EDM framework".

Step 1: Create a new web application

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

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

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="SQLQueryEntityFrameworkApp.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 Raw SQL Query 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>

</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 SQLQueryEntityFrameworkApp.Models;

namespace SQLQueryEntityFrameworkApp

{

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 = objContext.tblEmployees.SqlQuery("select * from dbo.tblEmployee ORDER BY Age DESC").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