How to create C# Utility Class? - ASP.net

What is Utility Class?

A Utility Class is a set of methods that perform common, often re-use functions. It may contains static functions but no attributes. I will explain you with an example of C# Utility Class and how to use this util class in ASP.net web application. Find the web project source below :-

utility class in c#

<connectionStrings>

<add name="myConnString" connectionString="Server=localhost;Initial Catalog=OnlineShopping;Integrated Security=True"/>

</connectionStrings>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Configuration;

namespace WebDemo_Utility

{

    public sealed class Util // sealed to ensure the utility class won't be inherited

    {

        private Util() { } // Ensure you cannot instantiate an object of this type

        //Add static methods which means you can reference them

        //anywhere in the project simply by using Util.

        //This one keeps the name of the connection string in just 2 places -

        //once in the Web.Config, and once in the Util class.

        public static string GetConnString()

        {

           return WebConfigurationManager.ConnectionStrings["myConnString"].ConnectionString;

        }

    }

}

To use this method is simple. Whenever a connection object is created one of the arguments passed to the constructor is the connection string. This is done as follows:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace WebDemo_Utility

{

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

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            string connectionString = Util.GetConnString();

            Response.Write(connectionString);

        }

    }

}

Download Code

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