IntroductionToday, in this article let's play around with one of the interesting and most useful concepts in Entity Data Model Framework 5.0.Question: What is select data using TVF via EDM Framework 5.0?In simple terms "It provides flexibility to pull off the data from a table valued function into an Entity Model using Entity Framework 5.0".Step 1: Table Valued Function Script looks like this:USE [Company]GO/****** Object: UserDefinedFunction [dbo].[GetEmployeeData] Script Date: 12/15/2012 15:24:29 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCreate Function [dbo].[GetEmployeeData](@EmpId INT)RETURNS TABLERETURNSelect [EmpId],[FirstName],[LastName],[Age],[Location]From [dbo].[Employee]Where EmpId = @EmpIdGOStep 2: Create a new web application:Step 3: Add a new ADO.NET entity data model:Step 4: The complete code of WebForm1.aspx looks like this:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="TVFEFApp.WebForm1" %> <!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server"> <style type="text/css"> .grid { margin-top: 50px; } </style> <title></title></head><body> <form id="form1" runat="server"> <center> <div> <table> <tr> <td colspan="2" align="center"> <asp:Label ID="Label1" runat="server" Text="Select Data with TVF via Entity Framework 5.0" Font-Bold="true" Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label> </td> </tr> <tr> <td> <asp:Label ID="Label2" runat="server" Text="Please Enter Employee Id" ForeColor="Brown" Font-Bold="true" Font-Size="Medium" Font-Names="Verdana"></asp:Label> </td> <td> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> </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" /> </asp:GridView> </td> </tr> <tr> <td colspan="2" align="center"> <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 5: 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;namespace TVFEFApp{ public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { TextBox1.Focus(); } protected void Button1_Click(object sender, EventArgs e) { if (string.IsNullOrEmpty(TextBox1.Text)) { Label3.Text = "Please Enter Employee Id"; Label3.ForeColor = System.Drawing.Color.Red; } else { var query = from r in objEntities.GetEmployeeData(int.Parse(TextBox1.Text)) select new { EmployeeId = r.EmpId, FirstName = r.FirstName, LastName = r.LastName, Age = r.Age }; GridView1.DataSource = query; GridView1.DataBind(); Label3.Text = "Data Retrived Successfully"; Label3.ForeColor = System.Drawing.Color.Green; TextBox1.Text = string.Empty; } } #region Instance MembersCompanyEntities objEntities = new CompanyEntities(); #endregion }}Step 6: The output of the application looks like this:Step 7: The selected data output of the application looks like this:I hope this article is useful for you. I look forward for your comments and feedback. Thanks Vijay Prativadi.
You need to be a premium member to use this feature. To access it, you'll have to upgrade your membership.
Become a sharper developer and jumpstart your career.
$0
$
. 00
monthly
For Basic members:
$20
For Premium members:
$45
For Elite members: