LINQ

Select and Delete Data With SP Using LINQ

Introduction

Question: What is select data with SP using LINQ?

In simple terms "It enables selection of data using a Stored Procedure with LINQ queries".

Step 1: Create a new "ASP.NET Web Application", as in:

Output1.png

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

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="SelectSPLINQApp.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 using SP with LINQ" 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" />
                        </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;namespace SelectSPLINQApp
{
    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 = objEntities.SelectEmpData();
            GridView1.DataSource = query;
            GridView1.DataBind();}
        #region Instance MembersCompanyEntities1 objEntities = new CompanyEntities1();
        #endregion
    }
}

Step 4: The output of the application looks like this:

Output2.png

Step 5: The output of the data retrieved output operation result looks like this:

Output3.png

Question: What is delete data using SP via LINQ?

In simple terms "It provides the functionally of deleting the employee's table data using a SP with LINQ querie".

Step 1: Data in the database looks like this:

Output0.png

Step 2: Create a new WebForm project

Step 3: The complete code of WebForm1.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="DeleteSPLINQApp.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 SP with LINQ" 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" 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 4: 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 DeleteSPLINQApp
{
    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{objEntities.DeleteEmployeeData(int.Parse(TextBox1.Text));
                GridView1.DataSource = objEntities.SelectEmployeeData();
                GridView1.DataBind();
                Label3.Text = "Record Deleted Successfully";
                Label3.ForeColor = System.Drawing.Color.Green;
                TextBox1.Text = string.Empty;
            }
        }
        #region Instance MembersCompanyEntities objEntities = new CompanyEntities();
        #endregion
    }
}

Step 5: The output of the application looks like this:

Output2 (1).png

Step 6: The data deleted output of the application 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

Up Next
    Ebook Download
    View all
    Learn
    View all
    MVC Corporation is consulting and IT services based company.
    Get Started

    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.

    Basic

    $0

    $

    . 00

    monthly

    For Basic members:

    • Standard Profile
    • Access learning courses
    • Access free e-books
    • 1x point
    Premium

    $20

    $

    . 00

    monthly

    For Premium members:

    • Earn 2x reward points
    • Premium profile with Verified check
    • Premium Avatar with status update
    • Learning courses
    • Unlimited Certifications and badges on profile
    • Unlimited Book downloads
    • Access to Premium content
    • Online Training
    • Unlimited PDF conversions and downloads
    • Professional Resume Writing
    • Interview Preparations Guide
    • 25 messages per month
    • 1 "Kodzu" avatar, basic
    Elite

    $45

    $

    . 00

    monthly

    For Elite members:

    • Bundle E-books
    • Access to all Learn Series
    • Unlimited Apply Jobs