Hello,

DownloadFileAsync blocks (or hangs) the application for 3 or 4 seconds if 
there is no internet connection available, the expected behavior should be 
to continue normally and raise the error in the DownloadFileCompleted event 
in AsyncCompletedEventArgs, however this is not the case.

Thanks
Yehia

Hello, Yehia!

Does the url that is passed to DownloadFileAsync contain host name?

If that is so, try using IP address instead hostname, e.g. 
http://10.2.2.1/file.text

You wrote  on Wed, 15 Aug 2007 02:07:12 +0300:

 YA> DownloadFileAsync blocks (or hangs) the application for 3 or 4 seconds
 YA> if there is no internet connection available, the expected behavior
 YA> should be to continue normally and raise the error in the
 YA> DownloadFileCompleted event in AsyncCompletedEventArgs, however this is
 YA> not the case.


With best regards, Vadym Stetsiak.
Blog: http://vadmyst.blogspot.com

yes it does, but how would this matter?


----- Original Message -----
From: "Vadym Stetsiak" 
Newsgroups: microsoft.public.dotnet.framework
Sent: Wednesday, August 15, 2007 5:58 PM
Subject: Re: DownloadFileAsync


> Hello, Yehia!
>
> Does the url that is passed to DownloadFileAsync contain host name?
>
> If that is so, try using IP address instead hostname, e.g. 
> http://10.2.2.1/file.text
>
> You wrote  on Wed, 15 Aug 2007 02:07:12 +0300:
>
> YA> DownloadFileAsync blocks (or hangs) the application for 3 or 4 seconds
> YA> if there is no internet connection available, the expected behavior
> YA> should be to continue normally and raise the error in the
> YA> DownloadFileCompleted event in AsyncCompletedEventArgs, however this 
> is
> YA> not the case.
>
>
> With best regards, Vadym Stetsiak.
> Blog: http://vadmyst.blogspot.com
> 

Hello, Yehia!

If there is a host name in the url, API tries to resolve that hostname into 
an IP address (DNS) and only then perform connection.
If there is an IP address specified - API tries to connect to it without 
resolution.

The lag of 3 or 4 seconds can be due to this resolution process.

You wrote  on Thu, 16 Aug 2007 01:05:38 +0300:

 YA> yes it does, but how would this matter?


 YA> ----- Original Message -----
 YA> From: "Vadym Stetsiak" 
 YA> Newsgroups: microsoft.public.dotnet.framework
 YA> Sent: Wednesday, August 15, 2007 5:58 PM
 YA> Subject: Re: DownloadFileAsync

 >> Hello, Yehia!

 >> Does the url that is passed to DownloadFileAsync contain host name?

 >> If that is so, try using IP address instead hostname, e.g.
 >> http://10.2.2.1/file.text

 >> You wrote  on Wed, 15 Aug 2007 02:07:12 +0300:

 YA>>> DownloadFileAsync blocks (or hangs) the application for 3 or 4
 YA>>> seconds if there is no internet connection available, the expected
 YA>>> behavior should be to continue normally and raise the error in the
 YA>>> DownloadFileCompleted event in AsyncCompletedEventArgs, however
 YA>>> this
 >> is
 YA>>> not the case.


 >> With best regards, Vadym Stetsiak.
 >> Blog: http://vadmyst.blogspot.com

With best regards, Vadym Stetsiak.
Blog: http://vadmyst.blogspot.com

On Aug 16, 10:36 am, "Vadym Stetsiak"  wrote:


> If there is a host name in the url, API tries to resolve that hostname [...]


According to MSDN, "This method does not block the calling thread".
Maybe the setup (including DNS resolution, web request creation etc)
should be non-blocking as well, or the documentation changed.