IntroductionQuestion: What is select data using LINQ with WCF?In simple terms "It enables selection of data using LINQ queries via WCF Service".Step 1: Create a new webform projectStep 2: The complete code of webform1.aspx looks like this:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WCFAppusingLINQ.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"> <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 LINQ using WCF" 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" AutoGenerateColumns="False"> <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" /> <Columns> <asp:BoundField DataField="EmpId" HeaderText="Id" /> <asp:BoundField DataField="FirstName" HeaderText="FirstName" /> <asp:BoundField DataField="LastName" HeaderText="LastName" /> <asp:BoundField DataField="Age" HeaderText="Age" /> </Columns> </asp:GridView> </td> </tr> </table> </div> </center> </form></body></html>Step 3: 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 WCFAppusingLINQ.ServiceReference1;namespace WCFAppusingLINQ{ public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { GridView1.DataSource = objClient.GetAllEmployees(); GridView1.DataBind(); } #region Instance MembersService1Client objClient = new Service1Client(); #endregion }}Step 4: Create a new "WCF Service Application" project, as in:Step 5: The complete code of IService1.cs looks like this:using System;using System.Collections.Generic;using System.Linq;using System.Runtime.Serialization;using System.ServiceModel;using System.ServiceModel.Web;using System.Text;namespace WCFLINQ{ // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together. [ServiceContract] public interface IService1 { [OperationContract] List<Employee> GetAllEmployees(); }}Step 6: The complete code of Service1.svc.cs looks like this:using System;using System.Collections.Generic;using System.Linq;using System.Runtime.Serialization;using System.ServiceModel;using System.ServiceModel.Web;using System.Text;namespace WCFLINQ{ // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together. public class Service1 : IService1 { public List<Employee> GetAllEmployees() { var query = (from r in objEntities.Employee select r); return query.ToList(); } #region Instance MembersCompanyEntities objEntities = new CompanyEntities(); #endregion }}Step 7: The output of the application looks like this:Step 8: The output of the data retrieved output operation result looks like this:
Question: What is deleting data using LINQ with WCF?In simple terms "It enables deletion of data using LINQ queries via a WCF Service".Step 1: Create a new webform projectStep 2: The complete code of webform1.aspx looks like this:<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WCFDeleteUsingLINQApp.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"> <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="Delete Data using LINQ with WCF" 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="Delete 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" AutoGenerateColumns="false" 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" /> <Columns> <asp:BoundField DataField="EmpId" HeaderText="Id" /> <asp:BoundField DataField="FirstName" HeaderText="FirstName" /> <asp:BoundField DataField="LastName" HeaderText="LastName" /> <asp:BoundField DataField="Age" HeaderText="Age" /> </Columns> </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 3: 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 WCFDeleteUsingLINQApp.ServiceReference1;namespace WCFDeleteUsingLINQApp{ 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)) { Label3.Text = "Please Enter Some Values"; Label3.ForeColor = System.Drawing.Color.Red; } else { objClient.DeleteEmpData(int.Parse(TextBox1.Text)); GridView1.DataSource = objClient.GetAllEmployees(); GridView1.DataBind(); Label3.Text = "Records Deleted Successfully"; Label3.ForeColor = System.Drawing.Color.Green;T extBox1.Text = string.Empty; } } #region Instance MembersService1Client objClient = new Service1Client(); #endregion }}Step 4: Create a new "WCF Service Application" project.Step 5: The complete code of IService1.cs looks like this:using System;using System.Collections.Generic;using System.Linq;using System.Runtime.Serialization;using System.ServiceModel;using System.ServiceModel.Web;using System.Text;namespace WCFLINQDelete{ // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together. [ServiceContract] public interface IService1 { [OperationContract] List<Employee> GetAllEmployees(); [OperationContract] void DeleteEmpData(int a); }}Step 6: The complete code of Service1.svc.cs looks like this:using System;using System.Collections.Generic;using System.Linq;using System.Runtime.Serialization;using System.ServiceModel;using System.ServiceModel.Web;using System.Text;namespace WCFLINQDelete{ // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together. public class Service1 : IService1 { public List<Employee> GetAllEmployees() { var query = from r in objEntities.Employee select r; return query.ToList(); } public void DeleteEmpData(int a) { objEntities.DeleteEmployeeData(a); } #region Instance MembersCompanyEntities objEntities = new CompanyEntities(); #endregion }}Step 7: The output of the application looks like this:Step 8: The output of the data deleted output operation result looks like this:I hope this article is useful for you.. I look forward for your comments and feedback.. Thanks Vijay Prativadi
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