Prograssbar in Threding

Question

Hi all, Can u plz provide prograssbar coding using threding. Thanq u Regards Anuradha

jebasingh · Answer

let me explain the scenario i am going to explain you. i have a windows form with the controls , a command button and a progress bar which are dragged and dropped from tool box in visual studio 2003 IDE. Initially the progress bar should be hidden(visible = false). below is the code... using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Threading; namespace ExtractMessageWrapper { public delegate void DelegateThreadStart(); public delegate void DelegateThreadFinished(); public delegate void DelegateThreadMessage( int val); public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Button button1; private System.Windows.Forms.ProgressBar progressBar1; /// /// Required designer variable. /// private System.ComponentModel.Container components = null ; public DelegateThreadStart m_DelegateThreadStart; public DelegateThreadFinished m_DelegateThreadFinished; public DelegateThreadMessage m_DelegateThreadMessage; public Form1() { // // Required for Windows Form Designer support // InitializeComponent(); m_DelegateThreadStart = new DelegateThreadStart( this .ThreadStart); m_DelegateThreadFinished = new DelegateThreadFinished( this .ThreadFinished); m_DelegateThreadMessage = new DelegateThreadMessage( this .ThreadIncrement); } /// /// Clean up any resources being used. /// protected override void Dispose( bool disposing ) { if ( disposing ) { if (components != null ) { components.Dispose(); } } base .Dispose( disposing ); } #region Windows Form Designer generated code /// /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// private void InitializeComponent() { this .button1 = new System.Windows.Forms.Button(); this .progressBar1 = new System.Windows.Forms.ProgressBar(); this .SuspendLayout(); // // button1 // this .button1.Location = new System.Drawing.Point(200, 88); this .button1.Name = "button1"; this .button1.Size = new System.Drawing.Size(96, 23); this .button1.TabIndex = 0; this .button1.Text = "button1"; this .button1.Click += new System.EventHandler( this .button1_Click); // // progressBar1 // this .progressBar1.Location = new System.Drawing.Point(24, 24); this .progressBar1.Name = "progressBar1"; this .progressBar1.Size = new System.Drawing.Size(352, 24); this .progressBar1.Step = 1; this .progressBar1.TabIndex = 1; this .progressBar1.Visible = false ; // // Form1 // this .AutoScaleBaseSize = new System.Drawing.Size(5, 13); this .ClientSize = new System.Drawing.Size(400, 182); this .Controls.Add( this .progressBar1); this .Controls.Add( this .button1); this .Name = "Form1"; this .Text = "Form1"; this .ResumeLayout( false ); } #endregion /// /// The main entry point for the application. /// [STAThread] static void Main() { Application.Run( new Form1()); } Thread WorkerThread; private void button1_Click( object sender, System.EventArgs e) { WorkerThread = new Thread( new ThreadStart( this .WorkerThreadFunction)); WorkerThread.Name = "Progress Bar"; WorkerThread.Start(); } private void WorkerThreadFunction() { Invoke(m_DelegateThreadStart, null ); for ( int i = 0; i { Invoke(m_DelegateThreadMessage, new object []{i}); // here you can perform some other action .. // i use thread sleep to show you how the thread is working Thread.Sleep(500); } Invoke(m_DelegateThreadFinished, null ); } private void ThreadStart() { progressBar1.Visible = true ; progressBar1.Value = 0; } private void ThreadFinished() { progressBar1.Visible = false ; } private void ThreadIncrement( int val) { if (progressBar1.Value { progressBar1.Value = val ; } } } } let me explain what i have done in above code i have written three functions they are ThreadStart() - which actualy makes progressbar visible Threadfinished() - hides the progressbar ThreadIncrement(int val) - increments the value. i have delcared three delegates also which refer these functions public DelegateThreadStart m_DelegateThreadStart; public DelegateThreadFinished m_DelegateThreadFinished; public DelegateThreadMessage m_DelegateThreadMessage; Actual mapping happens for delegate and functions m_DelegateThreadStart = new DelegateThreadStart( this .ThreadStart); m_DelegateThreadFinished = new DelegateThreadFinished( this .ThreadFinished); m_DelegateThreadMessage = new DelegateThreadMessage( this .ThreadIncrement); declare a thread Thread WorkerThread; and start the thread like this WorkerThread = new Thread( new ThreadStart( this .WorkerThreadFunction)); WorkerThread.Name = "Progress Bar"; WorkerThread.Start(); best of luck.....

Prograssbar in Threding

Answers (1)