How C # is multithreaded programming

Programming | multithreading

First Contact C # When a small example, first posted to this bar. Because multithreaded programming is very complex, this small example can only be a knowledge point of the entry line

First build an application project, named Threadexample, put a text box (TextBox1) on the form, a label (Lblresult), and then put two buttons, respectively, named Btnstart, Btnstop.

Form code:

Namespace Threadexample
... {
Partial class Threadexample
... {
/**////<summary>
Required designer variable.
</summary>
Private System.ComponentModel.IContainer components = null;

/**////<summary>
Clean up any being used.
</summary>
<param name= "disposing" >true if managed resources should is disposed; Otherwise, false.</param>
protected override void Dispose (bool disposing)
... {
if (disposing && (components!= null))
... {
Components. Dispose ();
}
Base. Dispose (disposing);
}

Windows Form Designer generated code#region Windows Form Designer generated code

/**////<summary>
Required to Designer support-do not modify
The contents is with the Code Editor.
</summary>
private void InitializeComponent ()
... {
This.btnstart = new System.Windows.Forms.Button ();
This.btnstop = new System.Windows.Forms.Button ();
This.button1 = new System.Windows.Forms.Button ();
This.textbox1 = new System.Windows.Forms.TextBox ();
This.lblresult = new System.Windows.Forms.Label ();
This. SuspendLayout ();
//
Btnstart
//
This.btnStart.Location = new System.Drawing.Point (14, 38);
This.btnStart.Name = "Btnstart";
This.btnStart.Size = new System.Drawing.Size (75, 23);
This.btnStart.TabIndex = 0;
This.btnStart.Text = "Start";
This.btnStart.Click + = new System.EventHandler (This.btnstart_click);
//
Btnstop
//
This.btnStop.Location = new System.Drawing.Point (14, 68);
This.btnStop.Name = "Btnstop";
This.btnStop.Size = new System.Drawing.Size (75, 23);
This.btnStop.TabIndex = 1;
This.btnStop.Text = "Stop";
This.btnStop.Click + = new System.EventHandler (This.btnstop_click);
//
Button1
//
This.button1.Location = new System.Drawing.Point (14, 97);
This.button1.Name = "Button1";
This.button1.Size = new System.Drawing.Size (75, 23);
This.button1.TabIndex = 3;
This.button1.Text = "Close";
This.button1.Click + = new System.EventHandler (This.button1_click);
//
TextBox1
//
This.textBox1.Location = new System.Drawing.Point (14, 11);
This.textBox1.Name = "TextBox1";
This.textBox1.Size = new System.Drawing.Size (75, 21);
This.textBox1.TabIndex = 4;
This.textBox1.Text = "200";
//
Lblresult
//
This.lblResult.AutoSize = true;
This.lblResult.Location = new System.Drawing.Point (12, 139);
This.lblResult.Name = "Lblresult";
This.lblResult.Size = new System.Drawing.Size (23, 12);
This.lblResult.TabIndex = 5;
This.lblResult.Text = "0/0";
//
Threadexample
//
This. Autoscaledimensions = new System.Drawing.SizeF (6F, 12F);
This. AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
This. ClientSize = new System.Drawing.Size (104, 164);
This. Controls.Add (This.lblresult);
This. Controls.Add (This.textbox1);
This. Controls.Add (This.button1);
This. Controls.Add (This.btnstop);
This. Controls.Add (This.btnstart);
This. Name = "Threadexample";
This. Text = "Form1";
This. ResumeLayout (FALSE);
This. PerformLayout ();

}

#endregion

Private System.Windows.Forms.Button btnstart;
Private System.Windows.Forms.Button btnstop;
Private System.Windows.Forms.Button button1;
Private System.Windows.Forms.TextBox TextBox1;
Private System.Windows.Forms.Label Lblresult;
}
}
Program code:

Using System;
Using System.Collections.Generic;
Using System.ComponentModel;
Using System.Data;
Using System.Drawing;
Using System.Text;
Using System.Windows.Forms;
Using System.Threading;

Namespace Threadexample
... {
public partial class Threadexample:form
... {
Declaring a thread
Private Thread TimerThread;
Declare a variable to store the label value
int count, i = 0;

Public Threadexample ()
... {
InitializeComponent ();
}

Add the value of the label to 1;
public void AddData ()
... {
Displays the value of the lable
if (i = = count)
i = 0;
This.lblResult.Text = i.tostring () + "/" + count. ToString ();
i++;
}

Update threads
public void Updatathread ()
... {
Try
... {
You can use this delegate when invoking a control's calling method, or when you need a simple delegate and do not want to define it yourself.
MethodInvoker mi = new MethodInvoker (this. AddData);
while (true)
... {
Executes the specified delegate asynchronously on the thread that created the control's underlying handle
This. BeginInvoke (MI);
Thread.Sleep (50);
}
}
catch (ThreadInterruptedException)
... {
Customizing exception throwing display for specific problems
}
Finally
... {
Do some processing
}
}

       //boot thread
         public void Startthread ()
        ... {
            stopthread ();
            timerthread = new Thread (New ThreadStart ( Updatathread));
           //Gets or sets a value that indicates whether a thread is a background thread.
            Timerthread.isbackground = true;
            Timerthread.start ();
       }

       /Stop thread
         public void Stopthread ()
        ... {
            if (timerthread!= null)
             ... {
               /thread Threads
                Timerthread.interrupt ();
                TimerThread = null ;
           }
       }

       //boot thread, display results
         private void btnStart_Click (object sender, EventArgs e)
         ... {
           //Calling thread startup function
             count = Int. Parse (TextBox1.Text);
            this. Startthread ();
       }

Stop thread
private void Btnstop_click (object sender, EventArgs e)
... {
Call Thread Stop function
This. Stopthread ();
}
}
}
After compiling, run, enter 200 in the text box, click the Start button, the label for dynamic growth, click Stop can pause program execution.