QlikSense C# SDK: location.SessionCookie throws an NPE

[JustinDallas]

Hello Folks,

I'm working with the C# QlikSense SDK along with a Nov2019 Patch 3 QlikSense system.  When I connect, and ask for the cookie, I get {"Object reference not set to an instance of an object."}.  Below is the code that throws the error:

ILocation location = Qlik.Engine.Location.FromUri(uri);
location.AsNtlmUserViaProxy(proxyUsesSsl:uri.Scheme.Equals(Uri.UriSchemeHttps, 
    loginCredentials: new NetworkCredential(username,passwordSecureString,domain),
    certificateValidation: false);

//Throws error below.     
var cookie = location.SessionCookie;

However, if I connect and then do somethings with my location, I can then request the cookie with no problems.

location.AsNtlmUserViaProxy(proxyUsesSsl:uri.Scheme.Equals(Uri.UriSchemeHttps), 
loginCredentials: new NetworkCredential(username,passwordSecureString,domain), 
certificateValidation: false);

using (new DebugConsole())
{
   var appIdentitifers = location.GetAppIdentifiers();
   var tractorHours2 = appIdentitifers.First(...
   var app = location.App(...);
   ISheetList sheetList = app.GetSheetList();
   foreach(ISheetObjectViewListContainer item in sheetList.Items)
   {
      //Below works
      var cookie = location.SessionCookie;

Is there anything I should be doing or know about concerning about when my cookie becomes available?

Any help is greatly appreciated.

[Øystein_Kolsrud · Accepted solution]

The cookie is provided as part of the response headers when the websocket connection is established. So it is expected that the cookie will only be set after you perform a connection.

That said, triggering a null pointer exception is probably not the most users friendly way to handle that situation though...