Lets Play Around With Bridge Design Pattern

Introduction

Today, in this article let's play around with one of the interesting and most useful concepts of design patterns, which will be hosted in a web app.

Question: What is Bridge Pattern?

In simple terms "It decouples abstraction from its implementation logic and creates a bridge to access the content data logic". I think we are now good to go and implement this wonderful concept.

Step 1: The complete code of Default.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="BridgePatternApplication._Default" %>

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

</head>

<body>

<div>

Bridge Pattern - Design Patterns</h1>

<table>

<tr>

<td>

<asp:Label ID="Label1" runat="server" Text="Please Enter First Number" Font-Size="Small" Font-Bold="true" Font-Italic="true" Font-Names="Verdana"></asp:Label>

</td>

<td>

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<td>

<asp:Label ID="Label2" runat="server" Text="Please Enter Second Number" Font-Size="Small" Font-Bold="true" Font-Italic="true" Font-Names="Verdana"></asp:Label>

</td>

<td>

<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<asp:Button ID="Button1" runat="server" Text="Addition" Width="165px" Font-Names="Verdana" BackColor="Orange" OnClick="Button1_Click" />

</td>

</tr>

<tr>

<asp:Button ID="Button2" runat="server" Text="Subtraction" Width="165px" Font-Names="Verdana"

BackColor="Orange" OnClick="Button2_Click" />

</td>

</tr>

<tr>

<asp:Button ID="Button3" runat="server" Text="Multiplication" Width="165px" Font-Names="Verdana" BackColor="Orange" OnClick="Button3_Click" />

</td>

</tr>

<tr>

<asp:Button ID="Button4" runat="server" Text="Division" Width="165px" Font-Names="Verdana"

BackColor="Orange" OnClick="Button4_Click" />

</td>

</tr>

</table>

<table>

<tr>

<asp:Label ID="lblResult" runat="server" Font-Names="Verdana" ForeColor="Brown"></asp:Label>

</td>

</tr>

</table>

</center>

</div>

</form>

</body>

</html>

Step 2: The complete code of IArthmetic.cs looks like this:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace BridgePatternApplication

{

public interface IArthmetic

{

double Arthmetic(double a, double b);

}

Step 3: The complete code of IArthmeticOperation.cs looks like this:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace BridgePatternApplication

{

public interface IArthmeticOperation

{

void Addition(); void Subtraction(); void Multiplication(); void Division();

}

Step 4: The complete code of AdditionClass.cs looks like this:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

namespace BridgePatternApplication

{

public class AdditionClass : IArthmetic

{

public double Arthmetic(double a, double b)

{ return a + b;

}

Step 5: The complete code of SubtractionClass.cs looks like this:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

namespace BridgePatternApplication

{

public class SubtractionClass : IArthmetic

{

public double Arthmetic(double a, double b)

{

return a - b;

}

Step 6: The complete code of MultiplicationClass.cs looks like this:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

namespace BridgePatternApplication

{

public class MultiplicationClass : IArthmetic

{

public double Arthmetic(double a, double b)

{

return a * b;

}

Step 7: The complete code of DivisionClass.cs looks like this:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

namespace BridgePatternApplication

{

public class DivisionClass : IArthmetic

{

public double Arthmetic(double a, double b)

{

return a / b;

}

Step 8: The complete code of Default.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;namespace BridgePatternApplication

{public partial class _Default : System.Web.UI.Page, IArthmeticOperation

{

protected void Page_Load(object sender, EventArgs e)

{

TextBox1.Focus();

}

protected void Button1_Click(object sender, EventArgs e)

{

if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text)){lblResult.Text = "Please Enter Some Values";

}

else{setArthmetic(objAddition);Addition();

}

protected void Button2_Click(object sender, EventArgs e)

{

if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text))

{

lblResult.Text = "Please Enter Some Values";}else{setArthmetic(objSubtraction);Subtraction();

}

protected void Button3_Click(object sender, EventArgs e)

{

if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text))

{

lblResult.Text = "Please Enter Some Values";}else{setArthmetic(objMultiplication);Multiplication();

}

protected void Button4_Click(object sender, EventArgs e)

{

if (string.IsNullOrEmpty(TextBox1.Text) || string.IsNullOrEmpty(TextBox2.Text)){lblResult.Text = "Please Enter Some Values";

}

else

{

setArthmetic(objDivision);Division();

}

#region Public Methodspublic void setArthmetic(IArthmetic arthmetic)

{

this.arthmeticComponent = arthmetic;

}

public void Addition()

{

lblResult.Text = "Addition Result of "+TextBox1.Text+" and "+TextBox2.Text+" is: <b>"+arthmeticComponent.Arthmetic(Convert.ToDouble(TextBox1.Text), Convert.ToDouble(TextBox2.Text)).ToString()+"</b>";TextBox1.Text = "";TextBox2.Text = "";

}

public void Subtraction()

{

lblResult.Text = "Subtraction Result of " + TextBox1.Text + " and " + TextBox2.Text + " is: <b>" + arthmeticComponent.Arthmetic(Convert.ToDouble(TextBox1.Text), Convert.ToDouble(TextBox2.Text)).ToString() + "</b>";TextBox1.Text = "";TextBox2.Text = "";

}

public void Multiplication()

{

lblResult.Text = "Multiplication Result of " + TextBox1.Text + " and " + TextBox2.Text + " is: <b>" + arthmeticComponent.Arthmetic(Convert.ToDouble(TextBox1.Text), Convert.ToDouble(TextBox2.Text)).ToString() + "</b>";TextBox1.Text = "";TextBox2.Text = "";

}

public void Division()

{

lblResult.Text = "Division Result of " + TextBox1.Text + " and " + TextBox2.Text + " is: <b>" + arthmeticComponent.Arthmetic(Convert.ToDouble(TextBox1.Text), Convert.ToDouble(TextBox2.Text)).ToString() + "</b>";TextBox1.Text = "";TextBox2.Text = "";

}

#endregion

#region Instance Variablesprotected IArthmetic arthmeticComponent;

AdditionClass objAddition = new AdditionClass();SubtractionClass objSubtraction = new SubtractionClass();

MultiplicationClass objMultiplication = new MultiplicationClass()

DivisionClass objDivision = new DivisionClass();

#endregion}

}

Step 9: The output of the application looks like this:

Step 10: The output of the nothing entered application looks like this:

Step 11: The output of the addition operation application looks like this:

Step 12: The output of the multiplication operation application looks like this:

I hope this article is useful for you. I look forward for your comments and feedback.