Enum 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

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>

</head>

<body>

<div>

<table>

<tr>

<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>

<asp:Button ID="Button1" runat="server" Text="Addition" Font-Names="Verdana" Width="213px"

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

</td>

</tr>

<tr>

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

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

</td>

</tr>

<tr>

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

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

</td>

</tr>

<tr>

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

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

</td>

</tr>

<tr>

<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

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

I hope this blog is useful for you.