SmartClient, WebService, and SecurityException in .NET 2.0

[Guest]

Hello,

I have a windows forms smart client application hosted within Internet
Explorer that was made for .NET 1.1. The application is accessing a web
service that is located on the same site as the client dlls. The application
is running with Internet permissions without any problems on .NET 1.1 clients.

Now I'm trying to run this application with .NET 2.0 installed on the
client. This runs fine as long as I don't use a proxy server.
With a proxy server (without authentication), I'm receiving a
SecurityException
demanding WebPermission "connect" for the Url of the proxy server when
accessing the web service.
I would need to give the application full web access, because I might not
know the proxy Url upfront when it is retrieved by DHCP or DNS.
How can I get it working through the proxy without changing the client side
permissions? It doesn't make sense to me that the application can't
comunicate with the proxy server when running in the "Internet Zone".

Thanks in advance,
Jürgen

 

[Steven Cheng[MSFT]]

Hi Juergen,

For the .NET smart client application, it is quite restricted to
client-side CAS permission setting. And as you said, the server url is
currently in the "Internet Zone", it is likely that many CAS permissions
are not applied and in .net 2.0 the network access may have further
restrict on this. If the application is used in local network environment,
I suggest you try adding it to local intranet zone to test.

In addition, for .net framework 2.0, it is recommend that we use clickonce
to develop and deploy our smart client application. And for click once
application's security permission, we can use manifest file to declare it
so that the client can get it when try installing the click once
application:

#Deploy and Update Your Smart Client Projects Using a Central Server
http://msdn.microsoft.com/msdnmag/issues/04/05/clickonce/default.aspx


Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead



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