كيف يمكن برمجة شريط أخبار كالذي يظهر في القنوات الفضائية بإستخدام C#.net

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.IO.IsolatedStorage;

using System.IO;

using System.Configuration ;

using System.Text ;

namespace TextScroll

{

/// <summary>

/// Summary description for Form1.

/// </summary>

public class Form1 : System.Windows.Forms.Form

{

private System.Windows.Forms.Label label1;

private Timer timer1;

private IContainer components;

StreamReader sr;

private Label label2;

StringBuilder sb;

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 )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

}

Application.ExitThread();

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.components = new System.ComponentModel.Container();

this.label1 = new System.Windows.Forms.Label();

this.timer1 = new System.Windows.Forms.Timer(this.components);

this.label2 = new System.Windows.Forms.Label();

this.SuspendLayout();

//

// label1

//

this.label1.AutoSize = true;

this.label1.BackColor = System.Drawing.Color.Azure;

this.label1.Font = new System.Drawing.Font("Arial", 12F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.label1.ForeColor = System.Drawing.Color.MidnightBlue;

this.label1.Location = new System.Drawing.Point(38, 9);

this.label1.Name = "label1";

this.label1.Size = new System.Drawing.Size(0, 19);

this.label1.TabIndex = 0;

this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight;

//

// timer1

//

this.timer1.Interval = 500;

this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

//

// label2

//

this.label2.AutoSize = true;

this.label2.Location = new System.Drawing.Point(39, 42);

this.label2.Name = "label2";

this.label2.Size = new System.Drawing.Size(0, 13);

this.label2.TabIndex = 1;

//

// Form1

//

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(648, 116);

this.Controls.Add(this.label2);

this.Controls.Add(this.label1);

this.Name = "Form1";

this.Text = "Form1";

this.Load += new System.EventHandler(this.Form1_Load);

this.ResumeLayout(false);

this.PerformLayout();

}

#endregion

/// <summary>

/// The main entry point for the application.

/// </summary>

[sTAThread]

static void Main()

{

Application.Run(new Form1());

}

string s_line;

private void Form1_Load(object sender, System.EventArgs e)

{

timer1.Start();

readNews();

}

private void readNews()

{

try

{

sr = new StreamReader("news.txt");

s_line = sr.ReadToEnd();

sb = new System.Text.StringBuilder(s_line);

sb.Replace("\r\n", "");

label1.Text = sb.ToString();

label2.Text = sb.ToString();

label1.Left = 0 - label1.Width;

label2.Left = this.Width;

}

catch (Exception)

{

throw;

}

}

private void timer1_Tick(object sender, EventArgs e)

{

if (label1.Left >= this.Width)

label1.Left = 0 - label1.Width;

else

label1.Left += 10;

if (label2.Left <=0- this.Width)

label2.Left = this.Width;

else

label2.Left -= 10;

}

}

}