此代碼片段來自Stephen Cleary's blog,並給出了使用Task.Run時如何報告進度的示例。我想知道爲什麼在更新UI時沒有交叉線程問題,我的意思是爲什麼不需要調用?Task.Run和UI進度更新
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字符串連接自動調用ToString()方法 – 2018-03-01 07:11:27