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Select Data - POCO Template

Posted by Vijay Prativadi Articles | Articles C# February 12, 2013
This article demonstrates an interesting and very useful concept in Entity Framework.
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Introduction

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

Question: What is POCO template?

In simple terms "It enables generation of code with a template based upon an Entity".

Step 1: Create a new web application

Output1.jpg

Step 2: Adding a new Entity Data Model Framework

OutputEDF.jpg

Step 3: Make Code Generation Statergy as "None"

Output2.png

Step 4: Select POCO Template


Output3.png

Output4.jpg

Step 5: The complete code of WebForm1.aspx is as in the following:
 

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

    <div>

        <center>

            <div>

                <table>

                    <tr>

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

                            <asp:Label ID="Label1" runat="server" Text="Select Data - POCO Template" 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>

    </div>

    </form>

</body>

</html>


Step 6:
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 Select_DataPOCOTemplate

{

    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 objEntities.tblEmployee select new

            {

                FirstName = r.FirstName, LastName = r.LastName, Age = r.Age

            }

            ;

            GridView1.DataSource = query;

            GridView1.DataBind();

        }

        #region Instance MembersCompanyEntities objEntities = new CompanyEntities();

        #endregion

    }

}

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



Output5.png



Step 8: The select data output of the application is as in the following:

Output6.png



I hope this article was useful for you.

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