C # Two security methods for multi-threaded controls (delegate mode and BackgroundWorker Control Mode)

The implemented function is

1. After pressing button2, label2 displays a number every 100 milliseconds, ranging from 0 to 99. (Delegated implementation)

2. After pressing button3, label3 is displayed as the current time five seconds after the simulated time-consuming operation. (Implemented in BackgroundWorker Mode)

3. When executed in step 1 and step 2, you can press button1 to change the content of label1 to the content of textbox1. (The main thread is controlled here to display the multi-thread master thread without deadlock)

 

 

 1 using System;
2 using System. Collections. Generic;
3 using System. ComponentModel;
4 using System. Data;
5 using System. Drawing;
6 using System. Linq;
7 using System. Text;
8 using System. Windows. Forms;
9 using System. Threading;
10
11 namespace WindowsFormsApplication1
12 {
13 public partial class Form1: Form
14 {
15 private delegate void SetState (int x); // proxy
16 public Form1 ()
17 {
18 InitializeComponent ();
19 Thread. CurrentThread. Name = "Main"; // master Thread Name
20 Console. WriteLine (Thread. CurrentThread. Name );
21}
22
23 private void TempFunction () // intermediate function, used to call the target function multiple times in a row and simulate latency
24 {
25 for (int I = 0; I <100; I ++)
26 {
27 ThreadFunction (I );
28 Thread. Sleep (100 );
29}
30}
31 private void ThreadFunction (int x) // actual control operation function
32 {
33 if (label2.InvokeRequired) // use a delegate to operate
34 {
35 SetState ss = new SetState (ThreadFunction );
36 Invoke (ss, new object [] {x });
37 Console. WriteLine (Thread. CurrentThread. Name );
38}
39 else // normal operation
40 {
41 label2.Text = x. ToString ();
42 label2.Update ();
43 Console. WriteLine (Thread. CurrentThread. Name );
44}
45
46}
47
48 private void button#click (object sender, EventArgs e) // The button operation of the main thread to display the difference
49 {
50 label1.Text = textBox1.Text;
51}
52
53 private void button2_Click (object sender, EventArgs e) // press the button to start Multithreading
54 {
55 Thread th1 = new Thread (new ThreadStart (TempFunction ));
56 th1.IsBackground = true;
57 th1.Name = "kidfruit ";
58 th1.Start ();
59}
60
61 private void backgroundworker=dowork (object sender, DoWorkEventArgs e) // use the BackgroundWorker Control
62 {
63 Thread. Sleep (5000); // simulate operation Delay
64}
65
66 private void backgroundworkerappsrunworkercompleted (object sender, RunWorkerCompletedEventArgs e) // after the time-consuming operation of BackgroundWorker is completed
67 {
68 label3.Text = DateTime. Now. ToLongTimeString ();
69}
70
71 private void button3_Click (object sender, EventArgs e) // start time-consuming operations of BackgroundWorker
72 {
73 backgroundWorker1.RunWorkerAsync ();
74}
75
76
77}
78}
79