Application State Management in Web Service

Introduction:

Application state management is server side state management. It is stored on the memory of server.

Here we will create a web service using Application state management. This service will return the number that how many times the service has accessed. Let's create web service. Follow the given steps.

Go to Visual Studeo 2010 and take a New Project.
Take a ASP.NET Web Service Application.
Click ok button.
Replace the code with the following code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

namespace EHWS
{
/// <summary>
/// Summary description for Service1
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. // [System.Web.Script.Services.ScriptService]

public class Service1 : System.Web.Services.WebService
{
[WebMethod]
public int data()
{
if (Application["appli"] == null)
{
Application["appli"] = 1;
}
else
{
int i = (int)Application["appli"];
i++;
Application["appli"] = i;
}
return (int)Application["appli"];
}
}
}

Run the service.

Output:

After creating service, create a web application and write the following code on .aspx.cs page.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace aews
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void btnok_Click1(object sender, EventArgs e)
{
localhost.Service1 ob = new localhost.Service1();
TextBox1.Text = ob.data().ToString();
}
}
}

Run the web application.

Output:

Click the "ok" button.

Output:

Copy the URL of your running web application and Take a new Tab of your browser and paste it. Now click at "ok" button.

Output:

Means when we access the service by calling method, it will show how many times it has been accessed.