Question

C# winform动态创建多线程

写的窗体程序是要统计进程的流量 现在我已经写到可以选择一个进程并统计它的流量 但是进程关联的端口号太多了想要用多线程来改善速度 也就是每个线程统计一个端口的流量 请问有没有人知道要创建每次数量都未知的多线程怎么做

Answer 1

1 private void Form1_Load(object sender, EventArgs e)
2 {
3 Thread newthread = new Thread(new ThreadStart(BackgroundProcess));
4 newthread.Start();
5
6 }
7
8 /// <summary>
9 /// 定义一个代理
10 /// </summary>
11 private delegate void CrossThreadOperationControl();
12
13 private void BackgroundProcess()
14 {
15 // 将代理实例化为一个匿名代理
16 CrossThreadOperationControl CrossDelete = delegate()
17 {
18 int i = 1;
19 while (i < 5)
20 {
21 // 向列表框增加一个项目
22 listBox1.Items.Add("Item " + i.ToString());
23 i++;
24 }
25 label1.Text = "我在新线程里访问这个lable!";
26 listBox1.Items.Add(label1.Text);
27 };
28 listBox1.Invoke(CrossDelete);
29 }

收集一下，在C# winform编程中多线程操作控件时，可以有下面种方法：
1. 又看到一种方法（2014.1.6）：

1. 刚看到一种方法（2014.1.5）：

1 private void btnTest_Click(object sender, EventArgs e)
2 {
3 if (this.txtIP.Text.Trim() != "" && this.txtPort.Text.Trim() != "")
4 {
5 string proxy = this.txtIP.Text.Trim() + ":" + this.txtPort.Text.Trim();
6 string result = string.Empty;
7 this.btnTest.Enabled = false;
8 new Thread(delegate
9 {
10 Stopwatch stopwatch = new Stopwatch();
11 stopwatch.Start();
12 HttpClient httpClient = new HttpClient();
13 httpClient.Proxy = new WebProxy(proxy);
14 httpClient.TimeOut = 2000;
15 object result;
16 try
17 {
18 string a = httpClient.Get("http://www.baidu.com", "", "", "", "", "get");
19 if (a != "")
20 {
21 result = "响应成功！";
22 }
23 else
24 {
25 result = "响应失败！";
26 }
27 }
28 catch
29 {
30 }
31 stopwatch.Stop();
32 result = result;
33 result = string.Concat(new object[]
34 {
35 result,
36 ",响应花费:",
37 stopwatch.ElapsedMilliseconds,
38 "ms"
39 });
40 this.BeginInvoke(delegate
41 {
42 this.lbResult.Text = result;
43 this.btnTest.Enabled = true;
44 });
45 })
46 {
47 IsBackground = true
48 }.Start();
49 }
50 else
51 {
52 this.lbResult.Text = "请输入完整再提交！";
53 }
54 }

1. 直接使用表达式和Action()

1 private void btnInitEnv_Click(object sender, EventArgs e)
2 {
3 //初始化环境时回显出来的文字不让看
4 try
5 {
6 this.textBoxOutPut.Clear();
7 this.btnInitEnv.Enabled = false;
8 this.labelStateInfo.Text = "";
9 this.labelStateInfo.ForeColor = Color.Red;
10
11 if (!WriteToSerialPort("diags"))
12 {
13 this.btnInitEnv.Enabled = true;
14 return;
15 }
16
17 Thread thread = new Thread(new ThreadStart(() =>
18 {
19 int i = 0;
20 bool flagFind = false;
21 StringBuilder sb = new StringBuilder();
22
23 while (true)
24 {
25 Thread.Sleep(300);
26 this.Invoke(new Action(() =>
27 {
28 sb.Append(this.textBoxOutPut.Text);
29 this.textBoxOutPut.Clear();
30 if (sb.ToString().Contains("Entering recovery mode, starting command prompt"))
31 {
32 this.textBoxOutPut.AppendText(string.Format(PubilcConstVar.TerimalStrFormat,
33 DateTime.Now.ToString(PubilcConstVar.TimeFormat),
34 "Entering recovery mode, starting command prompt, Stop.\r\n"));
35 this.labelStateInfo.ForeColor = Color.Red;
36 this.labelStateInfo.Text = "初始化失败，请手动输入命令初始化";
37 flagFind = true;
38 this.btnInitEnv.Enabled = true;
39 }
40 else if (sb.ToString().Contains(":-)"))
41 {
42 this.textBoxOutPut.AppendText(string.Format(PubilcConstVar.TerimalStrFormat,
43 DateTime.Now.ToString(PubilcConstVar.TimeFormat),
44 "进入操作模式成功\r\n"));
45 this.labelStateInfo.ForeColor = Color.Blue;
46 this.labelStateInfo.Text = "初始化成功";
47 flagFind = true;
48
49 //将业务按钮使能
50 EnableBussinessButtons();
51 }
52 }));
53
54 if (flagFind || ++i > 20) //找开标志或10秒超时中断
55 {
56 break;
57 }
58 }
59
60 if (!flagFind)
61 {
62 this.Invoke(new Action(() =>
63 {
64 this.textBoxOutPut.Clear();
65 this.labelStateInfo.ForeColor = Color.Red;
66 this.labelStateInfo.Text = "初始化失败，超时";
67 this.btnInitEnv.Enabled = true;
68
69 DisableBussinessButtons();
70 }));
71 }
72 }));
73
74 thread.IsBackground = true;
75 thread.Start();
76 }
77 catch (Exception ex)
78 {
79 this.log.Write(ex.ToString());
80 }
81 }

2. 使用线程函数加action()

1 private void btnInitEnv_Click(object sender, EventArgs e)
2 {
3 //初始化环境时回显出来的文字不让看
4 try
5 {
6 this.textBoxOutPut.Clear();
7 this.btnInitEnv.Enabled = false;
8 this.labelStateInfo.Text = "";
9 this.labelStateInfo.ForeColor = Color.Red;
10
11 if (!WriteToSerialPort("diags"))
12 {
13 this.btnInitEnv.Enabled = true;
14 return;
15 }
16
17 Thread thread = new Thread(new ThreadStart(MonitorOutPutThread));
18
19 thread.IsBackground = true;
20 thread.Start();
21 }
22 catch (Exception ex)
23 {
24 this.log.Write(ex.ToString());
25 }
26 }

线程函数：

1 private void MonitorOutPutThread()
2 {
3 int i = 0;
4 bool flagFind = false;
5 StringBuilder sb = new StringBuilder();
6
7 while (true)
8 {
9 Thread.Sleep(300);
10 this.Invoke(new Action(() =>
11 {
12 sb.Append(this.textBoxOutPut.Text);
13 this.textBoxOutPut.Clear();
14 if (sb.ToString().Contains("Entering recovery mode, starting command prompt"))
15 {
16 this.textBoxOutPut.AppendText(string.Format(PubilcConstVar.TerimalStrFormat,
17 DateTime.Now.ToString(PubilcConstVar.TimeFormat),
18 "Entering recovery mode, starting command prompt, Stop.\r\n"));
19 this.labelStateInfo.ForeColor = Color.Red;
20 this.labelStateInfo.Text = "初始化失败，请手动输入命令初始化";
21 flagFind = true;
22 this.btnInitEnv.Enabled = true;
23 }
24 else if (sb.ToString().Contains(":-)"))
25 {
26 this.textBoxOutPut.AppendText(string.Format(PubilcConstVar.TerimalStrFormat,
27 DateTime.Now.ToString(PubilcConstVar.TimeFormat),
28 "进入操作模式成功\r\n"));
29 this.labelStateInfo.ForeColor = Color.Blue;
30 this.labelStateInfo.Text = "初始化成功";
31 flagFind = true;
32
33 //将业务按钮使能
34 EnableBussinessButtons();
35 }
36 }));
37
38 if (flagFind || ++i > 20) //找开标志或10秒超时中断
39 {
40 break;
41 }
42 }
43
44 if (!flagFind)
45 {
46 this.Invoke(new Action(() =>
47 {
48 this.textBoxOutPut.Clear();
49 this.labelStateInfo.ForeColor = Color.Red;
50 this.labelStateInfo.Text = "初始化失败，超时";
51 this.btnInitEnv.Enabled = true;
52
53 DisableBussinessButtons();
54 }));
55 }
56 }

追问

谢谢 但我看了代码似乎没有如何创建未知个数的线程的方法啊？