Devart Error On Opening Db Connection
Contents |
here for a quick overview of the site Help Center error establishing a database connection wordpress Detailed answers to any questions you might have Meta
Error Establishing A Database Connection Wordpress Localhost
Discuss the workings and policies of this site About Us Learn more about Stack Overflow error establishing a database connection godaddy the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x error establishing a database connection website Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Exception Devart.Data.Linq on a server “Devart.Data.Oracle.Linq.Provider” up vote 0 down vote favorite I am trying to deploy my
What Does Error Establishing A Database Connection Mean
application on Windows server 2007 32 Bit my application give me this Exception Error on opening DbConnection. bei Devart.Data.Linq.LinqCommandExecutionException.CanThrowLinqCommandExecutionException (String message, Exception e) bei Devart.Data.Linq.Provider.k.a.g() bei Devart.Data.Linq.Provider.k.a.b(IConnectionUser A_0) bei Devart.Data.Linq.Provider.k.b(IConnectionUser A_0) bei Devart.Data.Linq.Provider.DataProvider.ExecuteQuery(CompiledQuery compiledQuery, Object[] parentArgs, Object[] userArgs, Object lastResult) bei Devart.Data.Linq.Provider.DataProvider.ExecuteAllQueries(CompiledQuery compiledQuery, Object[] userArguments) bei Devart.Data.Linq.Provider.DataProvider.CompiledQuery.Devart.Data.Linq.Provider.ICompiledQuery.Execute(IProvider provider, Object[] userArgs) bei Devart.Data.Linq.DataQuery1.i() bei System.Collections.Generic.List1..ctor(IEnumerable1 collection) bei System.Linq.Enumerable.ToList[TSource](IEnumerable1 source) while excuting this Line in The Program var list = clientCustomers.ToList(); Thank you very much Code public Repository(String Connection, String EventPackageName, String EventScopeName) { this.connectionDict = this.getConnectionInfo(Connection); //this.context = new DataContext(connection);//old way this.context = new DataContext(Connection, new Devart.Data.Oracle.Linq.Provider.OracleDataProvider()); this.eventContext = new EventPacDataContext(Connection); this.eContext = new Context.EventPacDataContext(Connection, new Devart.Data.Oracle.Linq.Provider.OracleDataProvider()); this.eventPackageName = EventPackageName; this.eventScopeName = EventScopeName; this.clientUserName = this.connectionDict["User Id"]; } ///
resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners error establishing a database connection cpanel ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 error establishing a database connection wamp Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you
Error Establishing A Database Connection Aws
requested has been removed. You’ll be auto redirected in 1 second. ADO.NET Retrieving and Modifying Data in ADO.NET DbProviderFactories DbProviderFactories DbConnection, DbCommand and DbException http://stackoverflow.com/questions/18102140/exception-devart-data-linq-on-a-server-devart-data-oracle-linq-provider DbConnection, DbCommand and DbException DbConnection, DbCommand and DbException Factory Model Overview Obtaining a DbProviderFactory DbConnection, DbCommand and DbException Modifying Data with a DbDataAdapter TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and https://msdn.microsoft.com/en-us/library/9hy8csk1(v=vs.110).aspx is not being maintained. DbConnection, DbCommand and DbException .NET Framework (current version) Other Versions Visual Studio 2010 .NET Framework 4 .NET Framework 3.5 .NET Framework 2.0 Once you have created a DbProviderFactory and a DbConnection, you can then work with commands and data readers to retrieve data from the data source. Retrieving Data ExampleThis example takes a DbConnection object as an argument. A DbCommand is created to select data from the Categories table by setting the CommandText to a SQL SELECT statement. The code assumes that the Categories table exists at the data source. The connection is opened and the data is retrieved using a DbDataReader. C#VB Copy // Takes a DbConnection and creates a DbCommand to retrieve data // from the Categories table by executing a DbDataReader. static void DbCommandSelect(DbConnection connection) { string queryString = "SELECT CategoryID, CategoryName FROM Categories"; // C
on Open.( http://ashwini47-tts.blogspot.com/2012/06/wcf-data-service-odata-devart-error.html The connection was not closed.) Solution This problem can be fixed applyingsynchronization around Data Service ObjectContext instance lock (MyObjectContext) { http://serverfault.com/questions/57596/why-do-i-get-sqlite-error-unable-to-open-database-file //Do your queries here } Root Cause Thisproblem with Devart Data Driver that is not able to handle error establishing object connection request properly in multithreadedenvironment and tried to open an already open connection. Error Stack Trace
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Why do I get sqlite error, “unable to open database file”? up vote 44 down vote favorite 14 Using my Django app, I'm able to read from the database just fine. When the application didn't have permission to access the file, it gave me this error: attempt to write a readonly database Which made sense. So I edited the permissions on the file, so that the Apache process had write permissions. However, instead of it being able to write, I get this cryptic error: unable to open database file If it's useful, here's the entire output: Request Method: POST Request URL: http://home-sv-1/hellodjango1/polls/1/vote/ Exception Type: OperationalError Exception Value: unable to open database file Exception Location: /usr/lib/pymodules/python2.5/django/db/backends/sqlite3/base.py in execute, line 193 Python Executable: /usr/bin/python Python Version: 2.5.2 Python Path: ['/var/www', '/usr/lib/python2.5', '/usr/lib/python2.5/plat-linux2', '/usr/lib/python2.5/lib-tk', '/usr/lib/python2.5/lib-dynload', '/usr/local/lib/python2.5/site-packages', '/usr/lib/python2.5/site-packages', '/usr/lib/pymodules/python2.5', '/usr/lib/pymodules/python2.5/gtk-2.0'] Server time: Sun, 23 Aug 2009 07:06:08 -0500 Let me know if a stack trace is necessary. django sqlite share|improve this question asked Aug 23 '09 at 12:08 nbolton 2,33293757 add a comment| 8 Answers 8 active oldest votes up vote 52 down vote accepted Aha, just stumbled across an article explaining this. Also Django have info on their NewbieMistakes page. The solution is to make sure the directory containing the database file also has write access allowed to the process. In my case, running this command fixed the problem: chown www-data. . share|improve