WinForm UI假死的解决方法

方法一：async + await + Task

// 开始

private async void btnStart_Click(object sender, EventArgs e)

{

string message = await GetMessage();

MessageBox.Show(message);

}

// 一个耗时任务

private async Task GetMessage()

{

return await Task.Run(() =>

{

Thread.Sleep(10000);

return "Hello World";

});

}

方法二：使用BackgroundWorker组件

public Form1()

{

InitializeComponent();

this.backgroundWorker1.WorkerReportsProgress = true;

this.backgroundWorker1.WorkerSupportsCancellation = true;

this.backgroundWorker1.DoWork += DoWork;

this.backgroundWorker1.ProgressChanged += ProgressChanged;

this.backgroundWorker1.RunWorkerCompleted += RunWorkerCompleted;

}

// 开始

private void btnStart_Click(object sender, EventArgs e)

{

if (backgroundWorker1.IsBusy)

{

return;

}

backgroundWorker1.RunWorkerAsync();

}

// DoWork

private void DoWork(object sender, DoWorkEventArgs e)

{

int max = pgbStatus.Maximum;

for (int i = 1; i <= max; i++)

{

backgroundWorker1.ReportProgress(i);

Thread.Sleep(1000);

}

}

// ProgressChanged

private void ProgressChanged(object sender, ProgressChangedEventArgs e)

{

pgbStatus.Value = e.ProgressPercentage;

}

// RunWorkerCompleted

private void RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)

{

MessageBox.Show("完成");

}

方法三：Task + 委托（回调函数）

// 开始

private void btnStart_Click(object sender, EventArgs e)

{

Task task = Task.Run(() =>

{

int max = progressBar1.Maximum;

for (int i = 1; i <= max; i++)

{

UpdateValue(i);

Thread.Sleep(1000);

}

});

}

// 处理线程

private void UpdateValue(int num)

{

if (progressBar1.InvokeRequired)

{

progressBar1.Invoke(new Action(UpdateValue), new object[] { num });

}

else

{

progressBar1.Value = num;

}

}

来自：https://www.codenong.com/cs106719464/