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Enum in C#

Posted by Vijay Prativadi Blogs | Visual C# Oct 12, 2012
Today, in this blog let’s play around with one of the interesting and most useful concept in C#.

Introduction

 

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

Question: What is enum?

In simple terms "It is set of named constants"

Step 1: Create a new webform project

 

asp.net-web-forms-application.png
 

Step 2: The complete code of Arithmetic.cs looks like this

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

namespace EnumsApp

{

    public enum Arthmetic

    {

        Addition, Substraction, Multiplication, Division

    }

}

 

Step 3: The complete code of webform1.aspx looks like this

 

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

{

    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

            {

                Arthmetic objArithmetic = Arthmetic.Addition; DoArithmetic(objArithmetic);

            }

        }

        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

            {

                Arthmetic objArithmetic = Arthmetic.Substraction; DoArithmetic(objArithmetic);

            }

        }

        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

            {

                Arthmetic objArithmetic = Arthmetic.Multiplication; DoArithmetic(objArithmetic);

            }

        }

        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

            {

                Arthmetic objArithmetic = Arthmetic.Division; DoArithmetic(objArithmetic);

            }

        }

        protected void DoArithmetic(Arthmetic objArthmetic)

        {

            switch (objArthmetic)

            {

                case Arthmetic.Addition:

                Label5.Text = "Addition Result is " + (double.Parse(TextBox4.Text) + double.Parse(TextBox1.Text)).ToString();

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

                TextBox1.Text = string.Empty;

                TextBox4.Text = string.Empty;

                break;

                case Arthmetic.Substraction:

                    Label5.Text = "Substraction Result is " + (double.Parse(TextBox4.Text) - double.Parse(TextBox1.Text));

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

                    TextBox1.Text = string.Empty;

                    TextBox4.Text = string.Empty;

                    break;

                case Arthmetic.Multiplication:

                    Label5.Text = "Multiplication Result is " + (double.Parse(TextBox4.Text) * double.Parse(TextBox1.Text));

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

                    TextBox1.Text = string.Empty;

                    TextBox4.Text = string.Empty;

                    break;

                case Arthmetic.Division:

                    Label5.Text = "Division Result is " + (double.Parse(TextBox4.Text) / double.Parse(TextBox1.Text));

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

                    TextBox1.Text = string.Empty;

                    TextBox4.Text = string.Empty;

                    break;

            }

        }

    }

}

 

Step 5: The output of the application looks like this
 

arthemethic-operations-with-enum-in-Csharp.png
 

Step 6: The addition operation output of the application looks like this

  enum-arthemtic-operations.jpg

I hope this blog is useful for you.

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