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. ")); 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 ")); 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. ")); 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 ")); 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 }
3. 就是使用委托，这个网上例子很多，不再实现