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Articles / Database Development / SQL Server

Flexible and Plug-in-based .NET Application using Provider Pattern

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1 Dec 200511 min read 111.9K   1.2K   161  
This paper demonstrates creating a flexible, extensible, plug-in-based .NET application (JOM - Smart Job Manager). JOM is an asynchronous job processing engine built using the MS Provider design pattern and the .NET technology available today.
// =====================================================================================
// Copyright � 2005 by Shahed Khan. All rights are reserved.
// 
// If you like this code then feel free to go ahead and use it.
// The only thing I ask is that you don't remove or alter my copyright notice.
//
// Your use of this software is entirely at your own risk. I make no claims or
// warrantees about the reliability or fitness of this code for any particular purpose.
// If you make changes or additions to this code please mark your code as being yours.
// 
// website , email shahed.khan@gmail.com
// =====================================================================================


using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace ClientApplication
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class frmMain : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button btnSimpleJob;
		private System.Windows.Forms.Button btnTextToFileJob;
		private System.Windows.Forms.Button btnTextToImageJob;
		private System.Windows.Forms.Button btnCaptureImageJob;
		private System.Windows.Forms.TextBox tbText;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.GroupBox groupBox2;
		private System.Windows.Forms.Button btnExit;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public frmMain()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.btnSimpleJob = new System.Windows.Forms.Button();
			this.btnTextToFileJob = new System.Windows.Forms.Button();
			this.btnTextToImageJob = new System.Windows.Forms.Button();
			this.btnCaptureImageJob = new System.Windows.Forms.Button();
			this.tbText = new System.Windows.Forms.TextBox();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.label4 = new System.Windows.Forms.Label();
			this.label1 = new System.Windows.Forms.Label();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			this.label3 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.btnExit = new System.Windows.Forms.Button();
			this.groupBox1.SuspendLayout();
			this.groupBox2.SuspendLayout();
			this.SuspendLayout();
			// 
			// btnSimpleJob
			// 
			this.btnSimpleJob.Location = new System.Drawing.Point(32, 200);
			this.btnSimpleJob.Name = "btnSimpleJob";
			this.btnSimpleJob.Size = new System.Drawing.Size(152, 23);
			this.btnSimpleJob.TabIndex = 0;
			this.btnSimpleJob.Text = "Send Simple Job";
			this.btnSimpleJob.Click += new System.EventHandler(this.btnSimpleJob_Click);
			// 
			// btnTextToFileJob
			// 
			this.btnTextToFileJob.Location = new System.Drawing.Point(32, 80);
			this.btnTextToFileJob.Name = "btnTextToFileJob";
			this.btnTextToFileJob.Size = new System.Drawing.Size(152, 23);
			this.btnTextToFileJob.TabIndex = 1;
			this.btnTextToFileJob.Text = "Send Text To File Job";
			this.btnTextToFileJob.Click += new System.EventHandler(this.btnTextToFileJob_Click);
			// 
			// btnTextToImageJob
			// 
			this.btnTextToImageJob.Location = new System.Drawing.Point(32, 112);
			this.btnTextToImageJob.Name = "btnTextToImageJob";
			this.btnTextToImageJob.Size = new System.Drawing.Size(152, 23);
			this.btnTextToImageJob.TabIndex = 2;
			this.btnTextToImageJob.Text = "Send Text To Image Job";
			this.btnTextToImageJob.Click += new System.EventHandler(this.btnTextToImageJob_Click);
			// 
			// btnCaptureImageJob
			// 
			this.btnCaptureImageJob.Location = new System.Drawing.Point(32, 232);
			this.btnCaptureImageJob.Name = "btnCaptureImageJob";
			this.btnCaptureImageJob.Size = new System.Drawing.Size(152, 23);
			this.btnCaptureImageJob.TabIndex = 3;
			this.btnCaptureImageJob.Text = "Send Screen Capture Job";
			this.btnCaptureImageJob.Click += new System.EventHandler(this.btnCaptureImageJob_Click);
			// 
			// tbText
			// 
			this.tbText.Location = new System.Drawing.Point(208, 80);
			this.tbText.Name = "tbText";
			this.tbText.Size = new System.Drawing.Size(360, 20);
			this.tbText.TabIndex = 4;
			this.tbText.Text = "Type Text Here";
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.Add(this.label4);
			this.groupBox1.Location = new System.Drawing.Point(16, 48);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(584, 112);
			this.groupBox1.TabIndex = 5;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "Type Text and Send a Job";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(192, 64);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(368, 23);
			this.label4.TabIndex = 2;
			this.label4.Text = "This will write a file or image on  c:\\tmp\\  with the text you type in.";
			// 
			// label1
			// 
			this.label1.BackColor = System.Drawing.Color.LightBlue;
			this.label1.Dock = System.Windows.Forms.DockStyle.Top;
			this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label1.ForeColor = System.Drawing.Color.White;
			this.label1.Location = new System.Drawing.Point(0, 0);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(632, 40);
			this.label1.TabIndex = 6;
			this.label1.Text = "Client Test Application";
			// 
			// groupBox2
			// 
			this.groupBox2.Controls.Add(this.label3);
			this.groupBox2.Controls.Add(this.label2);
			this.groupBox2.Location = new System.Drawing.Point(16, 176);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(584, 96);
			this.groupBox2.TabIndex = 7;
			this.groupBox2.TabStop = false;
			this.groupBox2.Text = "Send a Job";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(192, 56);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(368, 23);
			this.label3.TabIndex = 1;
			this.label3.Text = "This will capture the Image of your screen and write a file on  c:\\tmp\\ ";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(192, 24);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(352, 23);
			this.label2.TabIndex = 0;
			this.label2.Text = "This will write a file on c:\\tmp\\ ";
			// 
			// btnExit
			// 
			this.btnExit.Location = new System.Drawing.Point(480, 280);
			this.btnExit.Name = "btnExit";
			this.btnExit.Size = new System.Drawing.Size(120, 23);
			this.btnExit.TabIndex = 8;
			this.btnExit.Text = "E&xit";
			this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
			// 
			// frmMain
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.BackColor = System.Drawing.SystemColors.Control;
			this.ClientSize = new System.Drawing.Size(632, 318);
			this.Controls.Add(this.btnExit);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.tbText);
			this.Controls.Add(this.btnCaptureImageJob);
			this.Controls.Add(this.btnTextToImageJob);
			this.Controls.Add(this.btnTextToFileJob);
			this.Controls.Add(this.btnSimpleJob);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.groupBox2);
			this.Name = "frmMain";
			this.Text = "ClientApp";
			this.groupBox1.ResumeLayout(false);
			this.groupBox2.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new frmMain());
		}

		private void btnSimpleJob_Click(object sender, System.EventArgs e)
		{
			QueuedClient client = new QueuedClient();
			client.QueueSimpleJob();
			if (client.IsErrorExists)
				MessageBox.Show(client.ErrorMessage);
			else
				MessageBox.Show("Message Sent");
		}

		private void btnTextToFileJob_Click(object sender, System.EventArgs e)
		{
			QueuedClient client = new QueuedClient();
			client.QueueTextToFileJob(tbText.Text);
			if (client.IsErrorExists)
				MessageBox.Show(client.ErrorMessage);
			else
				MessageBox.Show("Message Sent");
		}

		private void btnTextToImageJob_Click(object sender, System.EventArgs e)
		{
			QueuedClient client = new QueuedClient();
			client.QueueTextToImageJob(tbText.Text);
			if (client.IsErrorExists)
				MessageBox.Show(client.ErrorMessage);
			else
				MessageBox.Show("Message Sent");
		}

		private void btnCaptureImageJob_Click(object sender, System.EventArgs e)
		{
			QueuedClient client = new QueuedClient();
			client.QueueScreenCaptureImageJob();
			if (client.IsErrorExists)
				MessageBox.Show(client.ErrorMessage);
			else
				MessageBox.Show("Message Sent");
		}

		private void btnExit_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}
	}
}

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Written By
Web Developer
Australia Australia
I have been awarded MVP (Visual C#) for year 2007, 2008, 2009. I am a Microsoft Certified Application Developer (C# .Net). I currently live in Melbourne, Australia. I am a co-founder and core developer of Pageflakes www.pageflakes.com and Founder of Simplexhub, a highly experienced software development company based in Melbourne Australia and Dhaka, Bangladesh. Simplexhub.
My BLOG http://www.geekswithblogs.net/shahed
http://msmvps.com/blogs/shahed/Default.aspx.

Written By
Australia Australia
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

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