Anonymous Types in C#

Introduction

Today, in this article let's play around with one of the interesting and most useful concepts in C#.

Question: What are anonymous types?

In simple terms "It provides flexibility to define the properties with in-line coding and use them anywhere in the class. It can also be called a method without a name. When you use the anonymous defined properties they behave as strongly typed."

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

open-asp.net-webform-application.jpg

 

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

 

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="AnonymousTypesApp.WebForm1" %>

 

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

    <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="Arithmetic Operations with Anonymous Types in C#"

                            Font-Bold="true" Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>

                    </td>

                </tr>

                <tr>

                    <td>

                        <asp:Label ID="Label6" runat="server" Text="Please Enter FirstNumber" Font-Size="Large"

                            Font-Names="Verdana" 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 SecondNumber" Font-Size="Large"

                            Font-Names="Verdana" Font-Italic="true"></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="Addition" Font-Names="Verdana" Width="213px"

                            BackColor="Orange" Font-Bold="True" OnClick="Button1_Click" />

                    </td>

                </tr>

                <tr>

                    <td colspan="2" align="center">

                        <asp:Button ID="Button2" runat="server" Text="Substraction" Font-Names="Verdana"

                            Width="213px" BackColor="Orange" Font-Bold="True" OnClick="Button2_Click" />

                    </td>

                </tr>

                <tr>

                    <td colspan="2" align="center">

                        <asp:Button ID="Button3" runat="server" Text="Multiplication" Font-Names="Verdana"

                            Width="213px" BackColor="Orange" Font-Bold="True" OnClick="Button3_Click" />

                    </td>

                </tr>

                <tr>

                    <td colspan="2" align="center">

                        <asp:Button ID="Button4" runat="server" Text="Division" Font-Names="Verdana" Width="213px"

                            BackColor="Orange" Font-Bold="True" OnClick="Button4_Click" />

                    </td>

                </tr>

                <tr>

                    <td colspan="2" align="center">

                        <asp:Label ID="Label5" runat="server" Font-Bold="true" 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;

namespace AnonymousTypesApp

{

    public partial class WebForm1 : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            TextBox4.Focus();

        }

        protected void Button1_Click(object sender, EventArgs e)

        {

            if (string.IsNullOrEmpty(TextBox4.Text) || string.IsNullOrEmpty(TextBox1.Text))

            {

                Label5.Text = "Please Enter Some Values"; Label5.ForeColor = System.Drawing.Color.Red;

            }

            else

            {

                var additionType = new

                {

                    FirstNumber = double.Parse(TextBox4.Text), SecondNumber = double.Parse(TextBox1.Text) };

                Label5.Text = "Addition Result is " + (additionType.FirstNumber + additionType.SecondNumber).ToString();

                Label5.ForeColor = System.Drawing.Color.Green;

                TextBox1.Text = string.Empty;

                TextBox4.Text = string.Empty;

            }

        }

        protected void Button2_Click(object sender, EventArgs e)

        {

            if (string.IsNullOrEmpty(TextBox4.Text) || string.IsNullOrEmpty(TextBox1.Text))

            {

                Label5.Text = "Please Enter Some Values"; Label5.ForeColor = System.Drawing.Color.Red;

            }

            else

            {

                var substractionType = new

                {

                    FirstNumber = double.Parse(TextBox4.Text), SecondNumber = double.Parse(TextBox1.Text) };

                Label5.Text = "Substraction Result is " + (substractionType.FirstNumber - substractionType.SecondNumber).ToString();

                Label5.ForeColor = System.Drawing.Color.Green; TextBox1.Text = string.Empty;

                TextBox4.Text = string.Empty;

            }

        }

        protected void Button3_Click(object sender, EventArgs e)

        {

            if (string.IsNullOrEmpty(TextBox4.Text) || string.IsNullOrEmpty(TextBox1.Text))

            {

                Label5.Text = "Please Enter Some Values";

                Label5.ForeColor = System.Drawing.Color.Red;

            }

            else

            {

                var multiplicationType = new

                {

                    FirstNumber = double.Parse(TextBox4.Text), SecondNumber = double.Parse(TextBox1.Text) };

                Label5.Text = "Multiplication Result is " + (multiplicationType.FirstNumber * multiplicationType.SecondNumber).ToString();

                Label5.ForeColor = System.Drawing.Color.Green;

                TextBox1.Text = string.Empty;

                TextBox4.Text = string.Empty;

            }

        }

        protected void Button4_Click(object sender, EventArgs e)

        {

            if (string.IsNullOrEmpty(TextBox4.Text) || string.IsNullOrEmpty(TextBox1.Text))

            {

                Label5.Text = "Please Enter Some Values";

                Label5.ForeColor = System.Drawing.Color.Red;

            }

            else

            {

                var divisionType = new

                { FirstNumber = double.Parse(TextBox4.Text), SecondNumber = double.Parse(TextBox1.Text) };

                Label5.Text = "Division Result is " + (divisionType.FirstNumber / divisionType.SecondNumber).ToString();

                Label5.ForeColor = System.Drawing.Color.Green;

                TextBox1.Text = string.Empty; TextBox4.Text = string.Empty;

            }

        }

    }

}


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

arithmetic-operations-in-CSharp.jpg
 

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

  annoymous-arithmetic-operations-in-CSharp.jpg

I hope this article is useful for you.