【C#】线程中参数传递
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admin
2024年3月31日 1:9
本文热度 542
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摘要
启动线程的时候需要向线程函数中传递参数，一般有三种方式。
正文
用object 传参数
private void btnStart_Click(object sender, EventArgs e){ Thread t1 = new Thread(ShowDot); t1.Start(10);}
void ShowDot(object max){ int imax=int.Parse(max.ToString()); for (int i = 0; i < imax; i++) { this.BeginInvoke((() => { txtValue.Text += "."; })); System.Threading.Thread.Sleep(10); }}
通过lambda
private void btnStart_Click(object sender, EventArgs e){ Thread t1 = new Thread(() => { ShowDot(10); }); t1.Start();}
void ShowDot(int max){ for (int i = 0; i < max; i++) { this.BeginInvoke((() => { txtValue.Text += "."; })); System.Threading.Thread.Sleep(10); }}
使用类封装
public class Dot{ TextBox txt; int max = 0;
public Dot(int max, TextBox txt) { this.max = max; this.txt = txt; }
public void ShowDot() { for (int i = 0; i < max; i++) { txt.BeginInvoke((() => { txt.Text += "."; })); System.Threading.Thread.Sleep(10); } }}
private void btnStart_Click(object sender, EventArgs e){ Dot d = new Dot(10, txtValue); Thread t1 = new Thread(d.ShowDot); t1.Start();}
可以使用lock关键字来进行加锁操作
如果锁定了一个对象,需要访问该对象的所有其他线程则会处于阻塞状态,并等待直到该对象解除锁定。这,可能会导致严重的性能问题。
public class Dot{ private readonly object lockObj = new object(); TextBox txt; int max = 0;
public Dot(int max, TextBox txt) { this.max = max; this.txt = txt; }
public void ShowDot() { lock (lockObj) { for (int i = 0; i < max; i++) { txt.BeginInvoke((() => { txt.Text += "."; })); System.Threading.Thread.Sleep(10); } } }}
该文章在 2024/3/31 1:10:28 编辑过
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