Control.Invoke in CF 1.0

hi
i m using VS 2003 (C#) CF 1.0. i have a problem while accessing any
control from any other thread. i see alot of examples from web but it
rather always gives exceptions Argument exception. now my code didn't
give any exception but it is not working as i code to.

i have a form having a list box and button on it.

public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.ListBox listBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.MainMenu mainMenu1;
		private Thread t;


		public Form1()
		{
			//
			// 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 )
		{
			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.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.listBox1 = new System.Windows.Forms.ListBox();
			this.button1 = new System.Windows.Forms.Button();
			//
			// listBox1
			//
			this.listBox1.Location = new System.Drawing.Point(56, 24);
			this.listBox1.Size = new System.Drawing.Size(100, 114);
			//
			// button1
			//
			this.button1.Location = new System.Drawing.Point(72, 168);
			this.button1.Text = "button1";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			//
			// Form1
			//
			this.Controls.Add(this.button1);
			this.Controls.Add(this.listBox1);
			this.Menu = this.mainMenu1;
			this.Text = "Form1";

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>

		static void Main()
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			cThread tt = new cThread();
			tt.th = this.t;
			t = new Thread(new ThreadStart(tt.Starts));
			t.Start();
		}
		//public delegate void InsertintoList(object sender,
System.EventArgs e);

		public void InsertList()
		{
			this.listBox1.Invoke(new EventHandler(this.Inserting));
		}
		protected void Inserting(object sender, System.EventArgs e)
		{
			this.listBox1.Items.Add("hassan");
			//MessageBox.Show(this.listBox1.ToString());
		}
	}

and i have a class named cThread

using System;
using System.Data;
using System.Windows.Forms;
using System.Threading;

namespace TestingInvoke
{
	/// <summary>
	/// Summary description for cThread.
	/// </summary>
	public class cThread
	{
		public Thread th;
		private bool   stop;
		public cThread()
		{
			//
			// TODO: Add constructor logic here
			//
		}

		public void Starts()
		{
			int i=0;
			try
			{
				while(true)
				{
					Thread.Sleep(100);
					new Form1().InsertList();
					if(stop){break;}
					i++;
					if(i > 5) { this.Stop();}
				}
			}
			catch(Exception ex)
			{
				MessageBox.Show(ex.ToString());
			}
		}

		public void Stop()
		{
			this.stop=true;
		}
	}
}

in that cThread class i want to insert item in list. it was not doing
anything neither give me exception nor inserting the items.
plz help me
hassan mushtaq

Date:Mon, 23 Jul 2007 06:03:44 -0700 Author:

RE: Control.Invoke in CF 1.0

Try calling Application.DoEvents in the InsertList method.

Rick D.
Contractor

"hassanmushtaq" wrote:


> hi
> i m using VS 2003 (C#) CF 1.0. i have a problem while accessing any
> control from any other thread. i see alot of examples from web but it
> rather always gives exceptions Argument exception. now my code didn't
> give any exception but it is not working as i code to.
> 
> i have a form having a list box and button on it.
> 
> public class Form1 : System.Windows.Forms.Form
> 	{
> 		private System.Windows.Forms.ListBox listBox1;
> 		private System.Windows.Forms.Button button1;
> 		private System.Windows.Forms.MainMenu mainMenu1;
> 		private Thread t;
> 
> 
> 		public Form1()
> 		{
> 			//
> 			// 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 )
> 		{
> 			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.mainMenu1 = new System.Windows.Forms.MainMenu();
> 			this.listBox1 = new System.Windows.Forms.ListBox();
> 			this.button1 = new System.Windows.Forms.Button();
> 			//
> 			// listBox1
> 			//
> 			this.listBox1.Location = new System.Drawing.Point(56, 24);
> 			this.listBox1.Size = new System.Drawing.Size(100, 114);
> 			//
> 			// button1
> 			//
> 			this.button1.Location = new System.Drawing.Point(72, 168);
> 			this.button1.Text = "button1";
> 			this.button1.Click += new System.EventHandler(this.button1_Click);
> 			//
> 			// Form1
> 			//
> 			this.Controls.Add(this.button1);
> 			this.Controls.Add(this.listBox1);
> 			this.Menu = this.mainMenu1;
> 			this.Text = "Form1";
> 
> 		}
> 		#endregion
> 
> 		/// <summary>
> 		/// The main entry point for the application.
> 		/// </summary>
> 
> 		static void Main()
> 		{
> 			Application.Run(new Form1());
> 		}
> 
> 		private void button1_Click(object sender, System.EventArgs e)
> 		{
> 			cThread tt = new cThread();
> 			tt.th = this.t;
> 			t = new Thread(new ThreadStart(tt.Starts));
> 			t.Start();
> 		}
> 		//public delegate void InsertintoList(object sender,
> System.EventArgs e);
> 
> 		public void InsertList()
> 		{
> 			this.listBox1.Invoke(new EventHandler(this.Inserting));
> 		}
> 		protected void Inserting(object sender, System.EventArgs e)
> 		{
> 			this.listBox1.Items.Add("hassan");
> 			//MessageBox.Show(this.listBox1.ToString());
> 		}
> 	}
> 
> and i have a class named cThread
> 
> using System;
> using System.Data;
> using System.Windows.Forms;
> using System.Threading;
> 
> namespace TestingInvoke
> {
> 	/// <summary>
> 	/// Summary description for cThread.
> 	/// </summary>
> 	public class cThread
> 	{
> 		public Thread th;
> 		private bool   stop;
> 		public cThread()
> 		{
> 			//
> 			// TODO: Add constructor logic here
> 			//
> 		}
> 
> 		public void Starts()
> 		{
> 			int i=0;
> 			try
> 			{
> 				while(true)
> 				{
> 					Thread.Sleep(100);
> 					new Form1().InsertList();
> 					if(stop){break;}
> 					i++;
> 					if(i > 5) { this.Stop();}
> 				}
> 			}
> 			catch(Exception ex)
> 			{
> 				MessageBox.Show(ex.ToString());
> 			}
> 		}
> 
> 		public void Stop()
> 		{
> 			this.stop=true;
> 		}
> 	}
> }
> 
> in that cThread class i want to insert item in list. it was not doing
> anything neither give me exception nor inserting the items.
> plz help me
> hassan mushtaq
> 
>

Date:Mon, 23 Jul 2007 09:24:03 -0700 Author: