Introduction
Today, in this article let's play around with one of the interesting and most useful concepts in WCF 4.5.
Question: What is channel factory caching?
In simple terms "It enables caching of channel factories when you consume the service on a client. A new CacheSetting property has been introduced in WCF 4.5 which provides flexibility to set it up".
Step 1: Create a new WCF 4.5 project.
![wcf-application.gif]()
Step 2: The complete code of IService1.cs looks like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
namespace ChannelFactoryCachingApp
{
// 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]
double Add(double a, double b);
[OperationContract]
double Sub(double a, double b);
[OperationContract]
double Mul(double a, double b);
[OperationContract]
double Div(double a, double b);
}
}
Step 3: The complete code of Service1.svc.cs looks like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using WcfService1;
namespace ChannelFactoryCachingApp
{
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
// NOTE: In order to launch WCF Test Client for testing this service, please select Service1.svc or Service1.svc.cs at the Solution Explorer and start debugging.
public class Service1 : IService1
{
public double Add(double a, double b)
{
return a + b;
}
public double Sub(double a, double b)
{
return a - b;
}
public double Mul(double a, double b)
{
return a * b;
}
public double Div(double a, double b)
{
return a / b;
}
}
}
Step 4: The complete code of web.config file looks like this:
<?xml version="1.0"?>
<configuration>
<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
</appSettings>
<system.web>
<compilation debug="true" targetFramework="4.5" />
<httpRuntime targetFramework="4.5"/>
</system.web>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information, set the values below to false before deployment -->
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="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>
<protocolMapping>
<add binding="basicHttpsBinding" scheme="https" />
</protocolMapping>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
<!--To browse web app root directory during debugging, set the value below to true.Set to false before deployment to avoid disclosing web app folder information.-->
<directoryBrowse enabled="true"/>
</system.webServer>
</configuration>
Step 5: Create an "ASP.NET Web Forms Application" project and add the service reference of the new WCF project; see:
![channel-chaching-app.gif]()
Step 6: The complete code of WebForm1.aspx looks like this:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="ChannelCachingApp.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">
<asp:Label ID="Label1" runat="server" Text="Arthmetic Operations - WCF 4.5 Channel Factory and Caching"
Font-Bold="true" Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>
</td>
</tr>
<tr>
<td>
<asp:Label ID="Label3" runat="server" Text="Please Enter First Number" Font-Size="Large"
Font-Names="Verdana" Font-Italic="true"></asp:Label>
</td>
<td>
<asp:TextBox ID="TextBox2" runat="server" Width="120px"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:Label ID="Label2" runat="server" Text="Please Enter Second Number" Font-Size="Large"
Font-Names="Verdana" Font-Italic="true"></asp:Label>
</td>
<td>
<asp:TextBox ID="TextBox1" runat="server" Width="120px"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="2" style="text-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" style="text-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" style="text-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" style="text-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" style="top: 50px; text-align: center">
<asp:Label ID="Label5" runat="server" Font-Bold="true" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>
</td>
</tr>
</table>
</div>
</center>
</form>
</body>
</html>
Step 7: The complete code of WebForm1.aspx.cs looks like this:
using ChannelCachingApp.ServiceReference1;
using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace ChannelCachingApp
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e){}
protected void Button1_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text))
{
Label5.Text = "Please Enter Some Values";
Label5.ForeColor = System.Drawing.Color.Red;
}
else
{
System.ServiceModel.ClientBase<IService1>.CacheSetting = CacheSetting.Default;
Label5.Text = "The Addition of " + TextBox1.Text + " and " + TextBox2.Text + " is " +
objClient.Add(double.Parse(TextBox1.Text), double.Parse(TextBox2.Text));
Label5.ForeColor = System.Drawing.Color.Green;
TextBox1.Text = string.Empty;
TextBox2.Text = string.Empty;
}
}
protected void Button2_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text))
{
Label5.Text = "Please Enter Some Values";
Label5.ForeColor = System.Drawing.Color.Red;
}
else
{
System.ServiceModel.ClientBase<IService1>.CacheSetting = CacheSetting.Default;
Label5.Text = "The Substraction of " + TextBox1.Text + " and " + TextBox2.Text + " is " +
objClient.Sub(double.Parse(TextBox1.Text), double.Parse(TextBox2.Text));
Label5.ForeColor = System.Drawing.Color.Green;
TextBox1.Text = string.Empty;
TextBox2.Text = string.Empty;
}
}
protected void Button3_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text))
{
Label5.Text = "Please Enter Some Values";
Label5.ForeColor = System.Drawing.Color.Red;
}
else
{
System.ServiceModel.ClientBase<IService1>.CacheSetting = CacheSetting.AlwaysOff;
Label5.Text = "The Multiplication of " + TextBox1.Text + " and " + TextBox2.Text + " is " +
objClient.Mul(double.Parse(TextBox1.Text), double.Parse(TextBox2.Text));
Label5.ForeColor = System.Drawing.Color.Green;
TextBox1.Text = string.Empty;
TextBox2.Text = string.Empty;
}
}
protected void Button4_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text))
{
Label5.Text = "Please Enter Some Values";
Label5.ForeColor = System.Drawing.Color.Red;
}
else
{
System.ServiceModel.ClientBase<IService1>.CacheSetting = CacheSetting.AlwaysOn;
Label5.Text = "The Division of " + TextBox1.Text + " and " + TextBox2.Text + " is " +
objClient.Div(double.Parse(TextBox1.Text), double.Parse(TextBox2.Text));
Label5.ForeColor = System.Drawing.Color.Green;
TextBox1.Text = string.Empty;TextBox2.Text = string.Empty;
}
}
#region Instance VariablesService1Client objClient = new Service1Client();
#endregion
}
}
Step 8: The output of application looks like this:
![channel-factory.gif]()
Step 9: The addition operation output of the application looks like this:
![wcf-channel-chaching.gif]()
I hope this article is useful for you. I look forward for your comments and feedback. Thanks Vijay Prativadi