c# - Wrapping entity framework exceptions on Open -

if user under service running doesn't have access database, ef fail following exception:

system.data.entity.core.providerincompatibleexception: error occurred while getting provider information database. can caused entity framework using incorrect connection string. check inner exceptions details , ensure connection string correct.

here's inner exception (that has specific details):

system.data.entity.core.providerincompatibleexception: provider did not return providermanifesttoken string. ---> system.data.sqlclient.sqlexception: login failed user '[redacted]'.    @ system.data.sqlclient.sqlinternalconnection.onerror(sqlexception exception, boolean breakconnection, action`1 wrapcloseinaction)    @ system.data.sqlclient.tdsparser.throwexceptionandwarning(tdsparserstateobject stateobj, boolean callerhasconnectionlock, boolean asyncclose)    @ system.data.sqlclient.tdsparser.tryrun(runbehavior runbehavior, sqlcommand cmdhandler, sqldatareader datastream, bulkcopysimpleresultset bulkcopyhandler, tdsparserstateobject stateobj, boolean& dataready)    @ system.data.sqlclient.tdsparser.run(runbehavior runbehavior, sqlcommand cmdhandler, sqldatareader datastream, bulkcopysimpleresultset bulkcopyhandler, tdsparserstateobject stateobj)    @ system.data.sqlclient.sqlinternalconnectiontds.completelogin(boolean enlistok)    @ system.data.sqlclient.sqlinternalconnectiontds.attemptonelogin(serverinfo serverinfo, string newpassword, securestring newsecurepassword, boolean ignoresniopentimeout, timeouttimer timeout, boolean withfailover)    @ system.data.sqlclient.sqlinternalconnectiontds.loginnofailover(serverinfo serverinfo, string newpassword, securestring newsecurepassword, boolean redirecteduserinstance, sqlconnectionstring connectionoptions, sqlcredential credential, timeouttimer timeout)    @ system.data.sqlclient.sqlinternalconnectiontds.openloginenlist(timeouttimer timeout, sqlconnectionstring connectionoptions, sqlcredential credential, string newpassword, securestring newsecurepassword, boolean redirecteduserinstance)    @ system.data.sqlclient.sqlinternalconnectiontds..ctor(dbconnectionpoolidentity identity, sqlconnectionstring connectionoptions, sqlcredential credential, object providerinfo, string newpassword, securestring newsecurepassword, boolean redirecteduserinstance, sqlconnectionstring userconnectionoptions, sessiondata reconnectsessiondata)    @ system.data.sqlclient.sqlconnectionfactory.createconnection(dbconnectionoptions options, dbconnectionpoolkey poolkey, object poolgroupproviderinfo, dbconnectionpool pool, dbconnection owningconnection, dbconnectionoptions useroptions)    @ system.data.providerbase.dbconnectionfactory.createpooledconnection(dbconnectionpool pool, dbconnection owningobject, dbconnectionoptions options, dbconnectionpoolkey poolkey, dbconnectionoptions useroptions)    @ system.data.providerbase.dbconnectionpool.createobject(dbconnection owningobject, dbconnectionoptions useroptions, dbconnectioninternal oldconnection)    @ system.data.providerbase.dbconnectionpool.usercreaterequest(dbconnection owningobject, dbconnectionoptions useroptions, dbconnectioninternal oldconnection)    @ system.data.providerbase.dbconnectionpool.trygetconnection(dbconnection owningobject, uint32 waitformultipleobjectstimeout, boolean allowcreate, boolean onlyonecheckconnection, dbconnectionoptions useroptions, dbconnectioninternal& connection)    @ system.data.providerbase.dbconnectionpool.trygetconnection(dbconnection owningobject, taskcompletionsource`1 retry, dbconnectionoptions useroptions, dbconnectioninternal& connection)    @ system.data.providerbase.dbconnectionfactory.trygetconnection(dbconnection owningconnection, taskcompletionsource`1 retry, dbconnectionoptions useroptions, dbconnectioninternal oldconnection, dbconnectioninternal& connection)    @ system.data.providerbase.dbconnectioninternal.tryopenconnectioninternal(dbconnection outerconnection, dbconnectionfactory connectionfactory, taskcompletionsource`1 retry, dbconnectionoptions useroptions)    @ system.data.sqlclient.sqlconnection.tryopeninner(taskcompletionsource`1 retry)    @ system.data.sqlclient.sqlconnection.tryopen(taskcompletionsource`1 retry)    @ system.data.sqlclient.sqlconnection.open()    @ system.data.entity.sqlserver.defaultsqlexecutionstrategy.<>c__displayclass1.<execute>b__0()    @ system.data.entity.sqlserver.defaultsqlexecutionstrategy.execute[tresult](func`1 operation)    @ system.data.entity.sqlserver.sqlproviderservices.usingconnection(dbconnection sqlconnection, action`1 act)    @ system.data.entity.sqlserver.sqlproviderservices.usingmasterconnection(dbconnection sqlconnection, action`1 act)    @ system.data.entity.sqlserver.sqlproviderservices.getdbprovidermanifesttoken(dbconnection connection)    @ system.data.entity.core.common.dbproviderservices.getprovidermanifesttoken(dbconnection connection)    --- end of inner exception stack trace ---    @ system.data.entity.core.common.dbproviderservices.getprovidermanifesttoken(dbconnection connection)    @ system.data.entity.utilities.dbproviderservicesextensions.getprovidermanifesttokenchecked(dbproviderservices providerservices, dbconnection connection) 

the issue pretty clear: user doesn't have access. isn't clear, though, database we're trying open. when have several databases (several dbcontexts) being used in span of 1 call, want know database rejecting user, , want know , easily.

as such, looking way override opening of connection, can catch exception , wrap more information. however, don't see easy way this, since dbcontext uses dbconnection. how hook process wrap connection opening? or there better way information i'm trying do?

the exception doesn't give me useful stack trace, since service async.

the inner exception has of details may require. base exception in case sqlexception

try {     //code fires error } catch (providerincompatibleexception ex) {     sqlexception baseexception = ex.getbaseexception() sqlexception;     console.writeline(baseexception.server); } 

you can log additional information wherever catching exception.