c#基础，单线程，跨线程访问和线程带参数

1 using System;
2 using System.Collections.Generic;
3 using System.Threading;
4 using System.Windows.Forms;
5
6 namespace 线程和跨线程
7 {
8     public partial class Form1 : Form
9     {
10         public Form1()
11         {
12             InitializeComponent();
13         }
14         /// <summary>
15         /// 单线程直接假死了
16         /// </summary>
17         /// <param name="sender"></param>
18         /// <param name="e"></param>
19         private void btnAlone_Click(object sender, EventArgs e)
20         {
21             for (int i = 0; i < 100000; i++)
22             {
23                 //通过[调试]-[窗口]-[输出]显示打印值
24                 Console.WriteLine(i);
25             }
26         }
27
28
29         /// <summary>
30         /// 新线程运行，窗体不假死
31         /// </summary>
32         /// <param name="sender"></param>
33         /// <param name="e"></param>
34         private void btnNew_Click(object sender, EventArgs e)
35         {
36             Thread th = new Thread(ShowCalculator)
37             {
38                 IsBackground = true
39             };
40             th.Start();
41
42         }
43         /// <summary>
44         /// 循环计算方法，供新线程使用
45         /// </summary>
46         private void ShowCalculator()
47         {
48             for (int i = 0; i < 100000; i++)
49             {//通过[调试]-[窗口]-[输出]显示打印值
50                 Console.WriteLine(i);
51             }
52         }
53         /// <summary>
54         /// 带参数的
55         /// </summary>
56         /// <param name="sender"></param>
57         /// <param name="e"></param>
58         private void btnParameters_Click(object sender, EventArgs e)
59         {
60             List<int> list = new List<int>() { 1, 2, 3, 4, 5 };
61             ParameterizedThreadStart parThreadStart = new ParameterizedThreadStart(ShowParameters);
62             Thread th = new Thread(parThreadStart) { IsBackground = true };
63             th.Start(list);
64         }
65         private void ShowParameters(object obj)
66         {
67             //线程中的参数只能是Object
68             List<int> result = obj as List<int>;
69             foreach (var item in result)
70             {
71                 MessageBox.Show(item.ToString());
72             }
73         }
74         /// <summary>
75         /// 跨线程访问
76         /// </summary>
77         /// <param name="sender"></param>
78         /// <param name="e"></param>
79         private void button1_Click(object sender, EventArgs e)
80         {
81             Thread th = new Thread(ShowMulti) { IsBackground = true };
82             th.Start();
83         }
84         /// <summary>
85         /// 解决跨线程访问报异常,不使用关闭跨线程检查
86         /// </summary>
87         private void ShowMulti()
88         {
89             int first = 0;
90             for (int i = 0; i < 10; i++)
91             {
92                 first = i;
93             }
94             //是否要对lbl控件进行跨线程
95             if (this.lblShow.InvokeRequired)
96             {
97                 //对委托中的数据类型验证
98                 this.lblShow.Invoke(new Action<Label, string>(ShowLableValue), this.lblShow, first.ToString());
99             }
100             else
101             {
102                 this.lblShow.Text = first.ToString();
103             }
104         }
105         /// <summary>
106         /// 把值写到控件中
107         /// </summary>
108         /// <param name="lbl"></param>
109         /// <param name="value"></param>
110         private void ShowLableValue(Label lbl, string value)
111         {
112             lbl.Text = value;
113         }
114
115         private void Form1_Load(object sender, EventArgs e)
116         {
117             //关闭跨进程检查
118             //Label.CheckForIllegalCrossThreadCalls = false;
119             //改用委托方法实现
120         }
121     }
122 }