asp.net mvc - Why is EF4 trying to re-create my database even though the model hasn't changed? -

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i have asp.net mvc 3 beta website using sql server ce 4.0. both scottgu's nerddinner example , own code, following exception try access database:

 file exists. try using different database name.  [ file name = d:\sourcecode\nerddinner\nerddinner\app_data\nerddinners.sdf ]  line 17:         public actionresult index() line 18:         { line 19:             var dinners = d in nerddinners.dinners line 20:                           d.eventdate > datetime.now line 21:                           select d;  [sqlceexception (0x80004005): file exists. try using different database name. [ file name = d:\sourcecode\nerddinner\nerddinner\app_data\nerddinners.sdf ]]    system.data.sqlserverce.sqlceengine.processresults(intptr perror, int32 hr) +92    system.data.sqlserverce.sqlceengine.createdatabase() +1584    system.data.sqlserverce.sqlceproviderservices.dbcreatedatabase(dbconnection connection, nullable`1 timeout, storeitemcollection storeitemcollection) +287    system.data.objects.objectcontext.createdatabase() +84    system.data.entity.internal.databaseoperations.create(objectcontext objectcontext) +35    system.data.entity.infrastructure.database.create() +70    system.data.entity.infrastructure.createdatabaseonlyifnotexists`1.initializedatabase(tcontext context) +360    system.data.entity.infrastructure.database.initialize() +272    system.data.entity.internal.internalcontext.initialize() +90    system.data.entity.internal.internalcontext.getentitysetandbasetypefortype(type entitytype) +34    system.data.entity.internal.linq.efinternalquery`1.initialize() +140    system.data.entity.internal.linq.efinternalquery`1.get_provider() +29    system.data.entity.infrastructure.dbquery`1.system.linq.iqueryable.get_provider() +34    system.linq.queryable.where(iqueryable`1 source, expression`1 predicate) +63    nerddinner.controllers.homecontroller.index() in d:\sourcecode\nerddinner\nerddinner\controllers\homecontroller.cs:19

i cannot figure out why works existing .dbf file , other times complains. have tried explicitly setting default behaviour with

database.setinitializer(new createdatabaseonlyifnotexists<...>());

has else experienced this?

  • restarting cassini doesn't seem make difference.
  • hitting refresh in ie after receiving error make exact same page load properly.

install , use sql server ce ctp1, still downloadable on microsoft sites. solved problem that.


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