PageAsyncTask を使用する次の ASP.NET コードが、そのまま実行しても、PageAsyncTask で 2 行コメントし、Page_load で Thread.Sleep(5000) のコメントを解除しても、合計 8 秒で実行されるのはなぜですか?:
//PageAsyncTask asyncTask1 = new PageAsyncTask(BeginAsyncOperation,
EndAsyncOperation,
OperationTimeOut, arr, true);
//Page.RegisterAsyncTask(asyncTask1);
Thread.Sleep(5000);
PageAsyncTask は他のタスクと並行してタスクを実行し、この場合、ページの読み込みの全体的なプロセスを高速化する必要があることを理解しています。私は何が欠けていますか？
public partial class _Default : System.Web.UI.Page
{
public delegate string foo(string param1, string param2);
public IAsyncResult BeginLongRunningTransaction(AsyncCallback cb, object state)
{
var arr = (string[])state;
string z1 = arr[0];
string z2 = arr[1];
foo method = this.LongRunningTransaction;
return method.BeginInvoke(z1, z2, cb, state);
}
protected void Page_Load(object sender, EventArgs e)
{
Response.Write(DateTime.Now.ToString() + "<br/>");
string[] arr = { "Zorik1", "Zorik2" };
// if I comment following two lines and un-comment
// Thread.Sleep(5000) command the process runs 8 sec. regardless
PageAsyncTask asyncTask1 = new PageAsyncTask(BeginAsyncOperation, EndAsyncOperation, OperationTimeOut, arr, true);
Page.RegisterAsyncTask(asyncTask1);
//Thread.Sleep(5000);
Thread.Sleep(1000);
Thread.Sleep(1000);
Thread.Sleep(1000);
}
private IAsyncResult BeginAsyncOperation(object sender, EventArgs e,
AsyncCallback cb, object state)
{
return this.BeginLongRunningTransaction(cb, state);
}
private string LongRunningTransaction(string param1, string param2)
{
Thread.Sleep(5000);
txtAsync.Text = "Updated";
updPnl1.Update();
return "this is return string";
}
private void EndAsyncOperation(IAsyncResult ar)
{
}
private void OperationTimeOut(IAsyncResult asyncResult)
{
string a = "";
}
protected void Page_PreRender(object s, EventArgs e)
{
string a = "";
Response.Write(DateTime.Now.ToString() + "<br/>");
}
protected void Page_PreRenderComplete(object s, EventArgs e)
{
Response.Write(DateTime.Now.ToString() + "<br/>");
}
}