此代码片段来自Stephen Cleary's blog,并给出了使用Task.Run时如何报告进度的示例。我想知道为什么在更新UI时没有交叉线程问题,我的意思是为什么不需要调用?Task.Run和UI进度更新
private async void button2_Click(object sender, EventArgs e)
{
var progressHandler = new Progress<string>(value =>
{
label2.Text = value;
});
var progress = progressHandler as IProgress<string>;
await Task.Run(() =>
{
for (int i = 0; i != 100; ++i)
{
if (progress != null)
progress.Report("Stage " + i);
Thread.Sleep(100);
}
});
label2.Text = "Completed.";
}
@newbieguy字符串连接自动调用ToString()方法 – 2018-03-01 07:11:27