我只是在尝试更新进度条,Parallel.ForEach应用程序似乎死机了。尽管我已经尝试过Invoke按照其他帖子中的建议使用解决方案,但是我仍然遇到问题。这是我的代码的简化版本:public partial class Form1 : Form{ event EventHandler ReportProgress; class ProgressEvent : EventArgs { public int Total { get; set; } public int Current { get; set; } } public Form1() { InitializeComponent(); ReportProgress += Form1_ReportProgress; } private void Form1_ReportProgress( object sender, EventArgs e ) { var progress = e as ProgressEvent; if ( InvokeRequired ) { this.Invoke( new Action( () => { progressBar.Maximum = progress.Total; progressBar.Value = progress.Current; } ) ); } } private void buttonStart_Click( object sender, EventArgs e ) { // Create a list with seed to be used later List<int> values = new List<int>() { }; values.AddRange( Enumerable.Range( 1, 15 ) ); var total = values.Count(); var current = 0; Parallel.ForEach( values, v => { Interlocked.Increment( ref current ); var r = new Random( v ); // Just sleep a little var sleep = r.Next( 10, 1000 ); Thread.Sleep( sleep ); // Update the progress bar ReportProgress( null, new ProgressEvent() { Current = current, Total = total } ); } ); MessageBox.Show( "Done " ); }}该应用程序似乎已挂起,并且未显示“消息”框,而如果我删除事件生成(ReportProgress),一切都将正常运行,但是显然进度条根本不会更新。
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您可以更改:
this.Invoke( new Action( () => { progressBar.Maximum = progress.Total; progressBar.Value = progress.Current; } ) );
至:
this.BeginInvoke( new Action( () => { progressBar.Maximum = progress.Total; progressBar.Value = progress.Current; } ) );
这将在异步线程上执行操作。
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