A timer problem?

C

Cem Louis

Hi,

I have a listbox with three values on it and a button on my form. When
I pressed the button the listbox have to select the next item after 2
seconds. Then select the next one after 2 seconds... And so on... Here
is my unworking below code:

Anyhelp would be greatly appreciated...
Thank you indeed...
Cem Louis

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

namespace WindowsApplication14
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Button button1;
private System.Timers.Timer timerClock = new System.Timers.Timer();
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

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

public void InitializeTimer()
{
this.timerClock.Elapsed += new ElapsedEventHandler(OnTimer);
this.timerClock.Interval = 2000;
this.timerClock.Enabled = true;
}

/// <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.listBox1 = new System.Windows.Forms.ListBox();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.Location = new System.Drawing.Point(8, 8);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(120, 95);
this.listBox1.TabIndex = 0;
//
// button1
//
this.button1.Location = new System.Drawing.Point(8, 112);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(120, 23);
this.button1.TabIndex = 1;
this.button1.Text = "Run";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(136, 142);
this.Controls.Add(this.button1);
this.Controls.Add(this.listBox1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void Form1_Load(object sender, System.EventArgs e)
{
listBox1.Items.Add("Arthur");
listBox1.Items.Add("Alex");
listBox1.Items.Add("Amie");
listBox1.Update();
}

private void OnTimer(object source, ElapsedEventArgs e)
{
this.nextvalue();
}

private void button1_Click(object sender, System.EventArgs e)
{
this.nextvalue();
}

private void nextvalue()
{
for(int i = 0;i<listBox1.Items.Count;i++)
{
listBox1.SetSelected(listBox1.Items.Count-i,true);
}
 
M

Mark Shehan

Hi Cem
You didnt start the timer.

In your button1_click code you need to add the line
timerClock.Start();

That should work
Mark

Cem Louis said:
Hi,

I have a listbox with three values on it and a button on my form. When
I pressed the button the listbox have to select the next item after 2
seconds. Then select the next one after 2 seconds... And so on... Here
is my unworking below code:

Anyhelp would be greatly appreciated...
Thank you indeed...
Cem Louis

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

namespace WindowsApplication14
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Button button1;
private System.Timers.Timer timerClock = new System.Timers.Timer();
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

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

public void InitializeTimer()
{
this.timerClock.Elapsed += new ElapsedEventHandler(OnTimer);
this.timerClock.Interval = 2000;
this.timerClock.Enabled = true;
}

/// <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.listBox1 = new System.Windows.Forms.ListBox();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.Location = new System.Drawing.Point(8, 8);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(120, 95);
this.listBox1.TabIndex = 0;
//
// button1
//
this.button1.Location = new System.Drawing.Point(8, 112);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(120, 23);
this.button1.TabIndex = 1;
this.button1.Text = "Run";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(136, 142);
this.Controls.Add(this.button1);
this.Controls.Add(this.listBox1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void Form1_Load(object sender, System.EventArgs e)
{
listBox1.Items.Add("Arthur");
listBox1.Items.Add("Alex");
listBox1.Items.Add("Amie");
listBox1.Update();
}

private void OnTimer(object source, ElapsedEventArgs e)
{
this.nextvalue();
}

private void button1_Click(object sender, System.EventArgs e)
{
this.nextvalue();
}

private void nextvalue()
{
for(int i = 0;i<listBox1.Items.Count;i++)
{
listBox1.SetSelected(listBox1.Items.Count-i,true);
}
Click to expand...
 
C

Cem Louis

Hi Mark,

Thanks for the suggestion. I have made some changes code becomes like
below but It is not working properly... I mean not working what I
want... (It(the selector line) must go to next listbox item in
determined second after clicking the run button...)???

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

namespace WindowsApplication14
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Button button1;
private System.Timers.Timer timerClock = new System.Timers.Timer();
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

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

public void InitializeTimer()
{
this.timerClock.Elapsed += new ElapsedEventHandler(OnTimer);
this.timerClock.Interval = 5000;
this.timerClock.Enabled = true;
}

/// <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.listBox1 = new System.Windows.Forms.ListBox();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.Location = new System.Drawing.Point(8, 8);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(120, 95);
this.listBox1.TabIndex = 0;
//
// button1
//
this.button1.Location = new System.Drawing.Point(8, 112);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(120, 23);
this.button1.TabIndex = 1;
this.button1.Text = "Run";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(136, 142);
this.Controls.Add(this.button1);
this.Controls.Add(this.listBox1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void Form1_Load(object sender, System.EventArgs e)
{
listBox1.Items.Add("Arthur");
listBox1.Items.Add("Alex");
listBox1.Items.Add("Amie");
listBox1.Update();
}

private void OnTimer(object source, ElapsedEventArgs e)
{
this.nextvalue();
}

private void button1_Click(object sender, System.EventArgs e)
{
timerClock.Start();
this.nextvalue();
}

private void nextvalue()
{
for(int i = 0;i<listBox1.Items.Count;i++)
{
listBox1.SetSelected(i,true);
}
}
}
}
 
M

Mark Shehan

I think i understand you to mean that each time the timer fires you want it
to move one down the list?

Currently your next value is set to go through every item in the list each
time the nextvalue() is called.

next value should just increment the item index in the list box by one.
something like
listbox1.setselected(listbox1.selectedindex++, true);

hope it helps
Mark

Cem Louis said:
Hi Mark,

Thanks for the suggestion. I have made some changes code becomes like
below but It is not working properly... I mean not working what I
want... (It(the selector line) must go to next listbox item in
determined second after clicking the run button...)???

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

namespace WindowsApplication14
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.Button button1;
private System.Timers.Timer timerClock = new System.Timers.Timer();
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

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

public void InitializeTimer()
{
this.timerClock.Elapsed += new ElapsedEventHandler(OnTimer);
this.timerClock.Interval = 5000;
this.timerClock.Enabled = true;
}

/// <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.listBox1 = new System.Windows.Forms.ListBox();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.Location = new System.Drawing.Point(8, 8);
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(120, 95);
this.listBox1.TabIndex = 0;
//
// button1
//
this.button1.Location = new System.Drawing.Point(8, 112);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(120, 23);
this.button1.TabIndex = 1;
this.button1.Text = "Run";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(136, 142);
this.Controls.Add(this.button1);
this.Controls.Add(this.listBox1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void Form1_Load(object sender, System.EventArgs e)
{
listBox1.Items.Add("Arthur");
listBox1.Items.Add("Alex");
listBox1.Items.Add("Amie");
listBox1.Update();
}

private void OnTimer(object source, ElapsedEventArgs e)
{
this.nextvalue();
}

private void button1_Click(object sender, System.EventArgs e)
{
timerClock.Start();
this.nextvalue();
}

private void nextvalue()
{
for(int i = 0;i<listBox1.Items.Count;i++)
{
listBox1.SetSelected(i,true);
}
}
}
}
Click to expand...
 

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