Insert Data With LINQ-to-SQL Via WCF Service

Vijay Prativadi
11y
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Article

Introduction

This article demonstrates an interesting and very useful concept in LINQ-to-SQL.

Question: What is insert data with LINQ-to-SQL via WCF service?

In simple terms "It provides flexibility when inserting data to a DB using LINQ-to-SQL context via WCF Service".

Step 1: Create a new web application

Step 2: Create a new WCF service application

Step 3: Adding a new LINQ-to-SQL

Step 4: The complete code of IService1.cs is as in the following:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
namespace WCFServiceApp
{
    // 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 5: The complete code of Service1.svc.cs is as in the following:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
namespace WCFServiceApp
{
    // 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.Employees select r);return query.ToList();}
        public void PutEmployee(string a, string b, int c)
        {
            objEntities.InsertData(a, b, c);
        }
        #region Instance MembersDataClasses1DataContext objEntities = new DataClasses1DataContext();
        #endregion
    }
}

Step 6: Adding a service reference

Step 7: The complete code of WebForm1.aspx is as in the following:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="InsertData_WCF_LINQtoSQL.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 with LINQ-to-SQL via 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 8: 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;
using InsertData_WCF_LINQtoSQL.ServiceReference1;
namespace InsertData_WCF_LINQtoSQL
{
    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 9: The output of the application is as in the following:

Step 10: The inserted data output of the application is as in the following:

I hope this article was useful for you.

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