好的,所以我在网站的登录页面上进行了一堆异步 Web 服务调用。我想将这些调用的结果设置为会话,以便以后可以使用它们,但我不能,因为HttpContext.Current
在回调中为 null。基本上,我想做这样的事情:
public ActionResult Something()
{
GetLoans(); //each of these is async
GetPartInfo(); //and sets its result to session
GetOtherAsyncStuff(); //(or at least it needs to)
//lots of other stuff
Return View();
}
哪里GetLoans()
看起来像这样:
public IAsyncResult GetLoans()
{
IAsyncResult _ar;
GetLoansDelegate d_Loans = new GetLoansDelegate(GetLoansAsync);
_ar = d_Loans.BeginInvoke(parameter1,parameter2, GetLoansCallback, new object()); //new object() is just a placeholder for the real parameters im putting there
return _ar;
}
其中异步调用GetLoansAsync
,其回调为GetLoansCallback()
,如下所示:
private void GetLoansCallback(IAsyncResult ar)
{
AsyncResult result = (AsyncResult)ar;
GetLoansDelegate caller = (GetLoansDelegate)result.AsyncDelegate;
List<Loan> loans = caller.EndInvoke(ar);
Session["Loans"] = loans; //this call blows up, since HttpContext.Current is null
}
我无法实现自定义会话提供程序,所以我必须坚持我所拥有的。就目前而言,我无法在异步回调中为会话设置任何内容。有没有办法解决这个问题?