Insert and Update Data Using LINQ With WCF

Introduction

Question: What is inserting data using LINQ with WCF?

In simple terms "It enables insertion of data using LINQ queries via WCF Service".

Step 1: Create a new webform project

Output1.png

Step 2: The complete code of webform1.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WCFAppusingLINQInsert.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>
            <table>
                <tr>
                    <td>
                        <asp:Label ID="Label1" runat="server" Text="Insert Data using LINQ with WCF" Font-Bold="true"></asp:Label>
                    </td>
                </tr>
                <tr
>
                    <td
>
                        <asp:GridView ID="GridView1" runat="server" BackColor="#CCCCCC" AutoGenerateColumns="False"
                            BorderColor="#999999" BorderStyle="Solid" BorderWidth="3px" CellPadding="4" CellSpacing="2"
                            ForeColor="Black" OnLoad="Page_Load">
                            <FooterStyle BackColor="#CCCCCC" />
                            <HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
                            <PagerStyle BackColor="#CCCCCC" ForeColor="Black" HorizontalAlign="Left" />
                            <RowStyle BackColor="White" />
                            <SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White" />
                            <SortedAscendingCellStyle BackColor="#F1F1F1" />
                            <SortedAscendingHeaderStyle BackColor="#808080" />
                            <SortedDescendingCellStyle BackColor="#CAC9C9" />
                            <SortedDescendingHeaderStyle BackColor="#383838" />
                            <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>
            <br />
            <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>
                    <td colspan="2">
                        <asp:Button ID="Button1" runat="server" Text="Insert Data" OnClick="Button1_Click"
                            BackColor="Orange" Font-Bold="true" /><br />
                        <br />
                    </td>
                </tr
>
            </table>
            <br />
            <br />
            <table>
                <tr>
                    <td colspan="3">
                        <asp:Label ID="Label5" runat="server" ForeColor="Red" Font-Bold="true"></asp:Label>
                    </td>
                </tr> 
           </table
>
        </center>
    </div>
    </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 WCFAppusingLINQInsert.ServiceReference1;
namespace
WCFAppusingLINQInsert
{
    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.Red;
            }
           
else
            {
                objClient.PutEmployee(TextBox1.Text, TextBox2.Text, int.Parse(TextBox3.Text));
                GridView1.DataSource = objClient.GetAllEmployees();
                GridView1.DataBind();
                Label5.Text = "Records Inserted Successfully";
                Label5.ForeColor = System.Drawing.Color.Green;
                TextBox1.Text = string.Empty;
                TextBox2.Text = string.Empty;
                TextBox3.Text = string.Empty;
            }
        }
        #region Instance MembersService1Client objClient = new Service1Client();
        #endregion
    }
}

Step 4: Create a new "WCF Service Application" project.

Output1.1.png

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 WCFLINQInsert
{
   
// 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 PutEmployee(string a, string b, int c);
    }
}


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 WCFLINQInsert
{
   
// 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 PutEmployee(string a, string b, int c)
        {
            objEntities.InsertEmployeeData(a, b, c);
        }
        #region Instance MembersCompanyEntities objEntities = new CompanyEntities();
        #endregion
    }
}

Step 7: The output of the application looks like this:

Output2.png

Step 8: The output of the data inserted output operation result looks like this:

Output3.png

Question: What is updating data using LINQ with WCF?

In simple terms "It enables the update of data using LINQ queries via WCF Service".

Step 1: Create a new webform project

Step 2: The complete code of webform1.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WCFUpdateusingLINQ.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>
            <table>
                <tr>
                    <td>
                        <asp:Label ID="Label1" runat="server" Text="Update with LINQ using WCF" Font-Bold="true"></asp:Label>
                    </td>
                </tr>
                <tr>
                    <td>
                        <asp:GridView ID="GridView1" runat="server" BackColor="#CCCCCC" AutoGenerateColumns="False"
                            BorderColor="#999999" BorderStyle="Solid" BorderWidth="3px" CellPadding="4" CellSpacing="2"
                            ForeColor="Black" OnLoad="Page_Load">
                            <FooterStyle BackColor="#CCCCCC" />
                            <HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
                            <PagerStyle BackColor="#CCCCCC" ForeColor="Black" HorizontalAlign="Left" />
                            <RowStyle BackColor="White" />
                            <SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White" />
                            <SortedAscendingCellStyle BackColor="#F1F1F1" />
                            <SortedAscendingHeaderStyle BackColor="#808080" />
                            <SortedDescendingCellStyle BackColor="#CAC9C9"
/>
                            <SortedDescendingHeaderStyle BackColor="#383838" />
                            <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>
            <br />
            <br />
            <table>
                <tr>
                    <td>
                        <asp:Label ID="Label6" runat="server" Text="Please Enter Id: " ForeColor="Brown"
                            Font-Bold="true" Font-Italic="true"></asp:Label>
                    </td>
                    <td>
                        <asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>
                    </td>
                </tr>
                <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
>
                    <td colspan="2">
                        <asp:Button ID="Button1" runat="server" Text="Update Data" OnClick="Button1_Click"
                            BackColor="Orange" Font-Bold="true" /><br
/>
                        <br />
                    </td>
                </tr>
            </table>
            <br />
            <br />
            <table>
                <tr>
                    <td colspan="3">
                        <asp:Label ID="Label5" runat="server" ForeColor="Red" Font-Bold="true"></asp:Label
>
                    </td>
                </tr
>
            </table>
        </center>
    </div>
    </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 WCFUpdateusingLINQ.ServiceReference1;
namespace
WCFUpdateusingLINQ
{
    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(TextBox4.Text) || string.IsNullOrEmpty(TextBox1.Text) ||
                string.IsNullOrEmpty(TextBox2.Text) || string.IsNullOrEmpty(TextBox3.Text))
            {
                Label5.Text = "Please Enter Some Values";
                Label5.ForeColor = System.Drawing.Color.Red;
            }
            else{objClient.UpdateEmployee(int.Parse(TextBox4.Text), TextBox1.Text, TextBox2.Text,
                int.Parse(TextBox3.Text));GridView1.DataSource = objClient.GetAllEmployees();
                GridView1.DataBind();
                Label5.Text = "Records Updated Successfully";
                Label5.ForeColor = System.Drawing.Color.Green;
                TextBox1.Text = string.Empty;
                TextBox2.Text = string.Empty;
                TextBox3.Text = string.Empty;
                TextBox4.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 WCFLINQUpdate
{
   
// 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 UpdateEmployee(int a, string b, string c, int d);
    }
}


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 WCFLINQUpdate
{
   
// 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()
        {
           
// TODO: Implement this methodvar
            query = from r in objEntities.Employee select r;
            return query.ToList();
        }
        public void UpdateEmployee(int a, string b, string c, int d)
        {
            objEntities.UpdateEmployeeData(a, b, c, d);
        }
        #region Instance MembersCompanyEntities objEntities = new CompanyEntities();
        #endregion
    }
}


Step 7: The output of the application looks like this:

Output2 (1).png
Step 8: The output of the data updated output operation result looks like this:

Output3 (1).png

I hope this article is useful for you. I look forward for your comments and feedback. Thanks Vijay Prativadi