WCF Service Role Using Azure on Client

Introduction

Today, in this article let's play around with one of the interesting and most useful concepts in Azure.

Question: What is WCF service role using Azure on client?

In simple terms "It enables use of a WCF service role with Azure and deployment of it across client context accessibility".

Step 1: Open Visual Studio 2010 and select Windows Azure Cloud Service application; see:

Step 2: Select WCF service web role and click on the ok - button.

Step 3: 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 WCFServiceWebRole1

{

// 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 4: 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;

namespace WCFServiceWebRole1

{

// NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.

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 5: The complete code of web.config looks like this:

<?xml version="1.0"?>

<system.diagnostics>

<trace>

</add>

</listeners>

</trace>

</system.diagnostics>

<system.web>

</system.web>

<system.serviceModel>

</behavior>

</serviceBehaviors>

</behaviors>

</system.serviceModel>

<system.webServer>

</system.webServer>

</configuration>

Step 6: Adding new client application to the solution:

asp.net-web-application.jpg

Step 7: Add new service reference to the project. In the context the service reference link looks like this:

http://127.0.0.1:81/Service1.svc

Step 8: The complete code of webform1.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="AzureClientWCFApp.WebForm1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<div>

<table>

<tr>

<asp:Label ID="Label1" runat="server" Text="WCF Service Role using Azure on Client"

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>

<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" ForeColor="Maroon"></asp:Label>

</td>

</tr>

</table>

</div>

</center>

</form>

</body>

</html>

Step 9: 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;

using AzureClientWCFApp.ServiceReference1;namespace AzureClientWCFApp

{

public partial class WebForm1 : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

this.TextBox2.Focus();

}

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

{

Label5.Text = string.Format("The Addition Result of {0} and {1} is <b>{2}</b>", TextBox1.Text, TextBox2.Text, objClient.Add(double.Parse(TextBox1.Text), double.Parse(TextBox2.Text)));

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

{

Label5.Text = string.Format("The Substraction Result of {0} and {1} is <b>{2}</b>", TextBox1.Text, TextBox2.Text, objClient.Sub(double.Parse(TextBox1.Text), double.Parse(TextBox2.Text)));

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

{

Label5.Text = string.Format("The Multiplication Result of {0} and {1} is <b>{2}</b>", TextBox1.Text, TextBox2.Text, objClient.Mul(double.Parse(TextBox1.Text), double.Parse(TextBox2.Text)));

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

{

Label5.Text = string.Format("The Division Result of {0} and {1} is <b>{2}</b>", TextBox1.Text, TextBox2.Text, objClient.Div(double.Parse(TextBox1.Text), double.Parse(TextBox2.Text)));

TextBox1.Text = string.Empty;TextBox2.Text = string.Empty;

}

#region Instance VariablesService1Client objClient = new Service1Client();

#endregion

}

Step 10: The output of the application looks like this:

Step 11: Addition operation output of the application looks like this:

I hope this article is useful for you.