Question Arises: What is Instance
Management?
We can say it is a type of rules governed to manage the services with clients.
It provides high end in scalability, durability and effective transaction
management.
Question Arises: What is Per-Call Based Instance Management?
Basically, we can say every time a new service instance will be created when the
client makes request. Based on the client request the method returns desired
response back to client. Once the response is sent back to client, the dispose
method will we will be declaring in this application releases the instances.
So, let's try to implement this concept so that we can get much better idea on
this:
So, firstly we will create simple method in IService1, Where the Complete Code
of IService1.cs looks like this:
using
System.ServiceModel;
namespace
SimpleInstanceManagement
{
// NOTE: You can use the "Rename"
command on the "Refactor" menu to change the interface name "IService1" in both
code and config file together.
[ServiceContract]
public
interface
IService1
{
[OperationContract]
int SimpleMethod(int
a);
}
}
The Complete Code of Service1.svc looks like this:
using
System;
using
System.ServiceModel;
namespace
SimpleInstanceManagement
{
// NOTE: You can use the "Rename"
command on the "Refactor" menu to change the class name "Service1" in code, svc
and config file together.
[ServiceBehavior(InstanceContextMode =
InstanceContextMode.PerCall)]
public
class Service1
: IService1, IDisposable
{
public
int Heighter = 0;
public
int SimpleMethod(int
a)
{
a = (Heighter
= Heighter + 1); return a;
}
public
void Dispose()
{
Heighter =
Heighter - 1;
}
}
}
The Complete Code of Web.Config looks like this:
<?xml
version="1.0"?>
<configuration>
<system.web>
<compilation
debug="true"
targetFramework="4.0"
/>
</system.web>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior
name="Application">
<!--
To avoid disclosing metadata information, set the value below to false and
remove the metadata endpoint above before deployment
-->
<serviceMetadata
httpGetEnabled="true"/>
<!--
To receive exception details in faults for debugging purposes, set the value
below to true. Set to false before deployment to avoid disclosing exception
information
-->
<serviceDebug
includeExceptionDetailInFaults="false"/>
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment
multipleSiteBindingsEnabled="true"
/>
<services>
<service
name="SimpleInstanceManagement.Service1"
behaviorConfiguration="Application">
<endpoint
address="/SimpleAddress"
binding="basicHttpBinding"
contract="SimpleInstanceManagement.IService1">
</endpoint>
<endpoint
address="mex"
binding="mexHttpBinding"
contract="IMetadataExchange">
</endpoint>
<host>
<baseAddresses>
<add
baseAddress="http://localhost:49257/Service1.svc"/>
</baseAddresses>
</host>
</service>
</services>
</system.serviceModel>
<system.webServer>
<modules
runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>
I have created New Web Application where I have added it to existing solution
files. I have specified service reference with a link as given below:
http://localhost:49257/Service1.svc
The Complete Code of WebForm1.aspx looks like this:
<%@
Page Language="C#"
AutoEventWireup="true"
CodeBehind="WebForm1.aspx.cs"
Inherits="Instance.WebForm1"
%>
<!DOCTYPE
html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html
xmlns="http://www.w3.org/1999/xhtml">
<head
id="Head1"
runat="server">
<title></title>
</head>
<body>
<form
id="form1"
runat="server">
<div>
<center>
<table>
<tr>
<td>
<asp:Label
ID="Label1"
runat="server"
Text="Please Enter
Some Value" ForeColor="Brown"
Font-Bold=" true"
Font-Italic="true">
</asp:Label>
</td>
<td>
<asp:TextBox
ID="TextBox1"
runat="server">
</asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button
ID="Button1"
runat="server"
Text="Click Here"
OnClick="Button1Click"
Style="margin-left:
0px" Width="118px"
/>
</td>
</tr>
</table>
</center>
</div>
</form>
</body>
</html>
The Complete Code of WebForm1.aspx.cs looks like this:
using
System;
using
Instance.ServiceReference1;
namespace
Instance
{
public
partial class
WebForm1 : System.Web.UI.Page
{
protected
void PageLoad(object
sender, EventArgs e)
{
}
protected void
Button1Click(object sender,
EventArgs e)
{
if (TextBox1.Text !=
null)
if ((TextBox1.Text) ==
"1")
{
var ab = new
Service1Client();
Response.Write("<center>The Value is: <b>" +
ab.SimpleMethod((Convert.ToInt32(TextBox1.Text)))
+
"</br></b></center>");
Response.Write("<center>The Value is: <b>" +
ab.SimpleMethod((Convert.ToInt32(TextBox1.Text)))
+
"</br></b></center>");
Response.Write("<center>The Value is: <b>" +
ab.SimpleMethod((Convert.ToInt32(TextBox1.Text)))
+
"</br></b></center>");
Response.Write("<center><i>Second Instance Created
for Service</i></center>");
var bc = new
Service1Client();
Response.Write("<center>The Value is: <b>" +
bc.SimpleMethod(Convert.ToInt32(TextBox1.Text))
+
"</br></b></center>");
Response.Write("<center>The Value is: <b>" +
bc.SimpleMethod(Convert.ToInt32(TextBox1.Text))
+
"</br></b></center>");
Response.Write("<center>The Value is: <b>" +
bc.SimpleMethod((Convert.ToInt32(TextBox1.Text)))
+
"</br></b></center>");
Response.Write("<center>The Value is: <b>" +
bc.SimpleMethod((Convert.ToInt32(TextBox1.Text)))
+
"</br></b></center>");
}
else
{
Response.Write("<center><b><i>Please Enter Some
Values or Enter Correct Values</i></b></center>");
}
}
}
}
The Output of the application looks like this:
![Per Call Output.png]()
The Output of the application if entered wrong or null:
![Error Pop Out for Per Call.png]()
I hope this article is useful for you.