Dbprovider profiler using wcf and dbproviderfactory injection. The problem with that implementation is the code complexity and number of classes. Hi all, i have implemented my own dbproviderfactory basically a class that you plug it into. Based on this information, the getfactory method creates a strongly typed provider factory. Nov 18, 2015 at the end of the day, this actual implementation of dbproviderfactory e. Transactions namespace, and wrap your calls to the. Lets assume providername indicates an sql provider so we will get an sqlclientfactory afterwards factory. Oct 02, 2011 some problems with dbproviderfactories. Dbproviderfactory code relationship with code for creating. Returns a dbcommand object that represents an oraclecommand object. So when the code in block 2 is executed by, then we actually end up executing code in block 1.
Net forums data access oracle, mysql, sybase, informix and other databases mysql connector. You can use oracleproviderfactory class to implement a code where user chooses which dbms to use to obtain an instance of the class you can use the dbproviderfactories. More info in the folllowing note if you have mos access. Net factory provider method to create oracle connections, commands, and such.
Net ref cursor and dbproviderfactory oracle community. Gets a value that indicates whether this dbproviderfactory instance supports the dbdatasourceenumerator class. Dbproviderfactory approach has a clear advantage since it creates a database independent data access layer, unlike the sqlclient approach. Fist off, a quick intro to dbproviderfactory concept on msdn. Creating dbproviderfactory object based on the provider given in nfig dbproviderfactory ofactory dbproviderfactories. Working around the lack of dynamic dbproviderfactory loading. Net intrinsic objects generically without requiring an explicit reference to the data access provider. You will need to replace the connection string in the example with a setting or connection string appropriate for your database. For example, to create a sqlclientfactory, you can pass getfactory a string with the provider name specified as system. The provider is maintained as part of the entity framework core project how to use sqlite provider.
Sqlite database provider allows entity framework core to be used with to be used with sqlite. On server explorer unable to find dbproviderfactory for type system. Code block 1 instantiate a sqlconnection using dbproviderfactory approach. Net access into generic classes so you can point to any providerdatabase, without a single piece of provider specific code, or provider specific reference. In this post i describe why this can be a problem for libraries that.
Working around the lack of dynamic dbproviderfactory. Net, then does this code result in the execution of corresponding dbproviderfactory code. Obtain the dbproviderfactory for sql server and create connection from it. Dbproviderfactories demystified teradata downloads. However, i got stuck in chapter 4 creating the product catalog part 1. The dbproviderfactorydescription class is a poco representation of the dbproviderfactory you can find in the nfig. Feb 27, 2008 when an dbhelper object is created, a dbproviderfactory object is created based on the data provider specified on the nfig file.
Gets a value that indicates whether this dbproviderfactory instance supports the dbdataadapter class. After the switch to factories, the problem started. Common, but the application who use that library will depend on sqldataprovider even with this proposal. Copy link quote reply promontoryprotean commented aug 16, 2015. Createdataadapter extracted from open source projects. Vs 2010 unable to find dbproviderfactory for type system. Net dbproviderfactory instances which in turn are used to gain access to the various ado. Ill set up the newest sql server and visual studio 2017. Net data provider assemblies and it is the job of dbproviderfactories class to load the requested. In ef core, the dbcontext has a virtual method called onconfiguring which will get called internally by ef core, and it will also pass in an optionsbuilder instance, and you can use that optionsbuilder to configure options for the dbcontext.
Net which creates instances of dbconnection, dbcommand etc and am trying to make linq use it. All public static methods are threadsafe, although instance methods do not guarantee thread safety. Obtain the dbproviderfactory for sql server and create. Oracle didnt create the factory classes, microsoft did.
I have a function that returns an individuals user name against the database from the supplied individuals id. Returns a dbcommandbuilder object that represents an oraclecommandbuilder object. Getfactoryprovidername will return an factory object according to the given providername. Net, sql robert muehsig recently i needed to write a module that needs to connect to a wide range of sqldbs, e. Introduction in my previouspost we discussed about the implementation of generic data access layer using factory pattern. For example, to create a sqlclientfactory, you can pass getfactory a. Net standard are missing the dbproviderfactories class which is used to dynamically load ado. I have a function that returns an individuals user name against the. Net full api for dbproviderfactory contains usage of datatable, so i recon thats not going to be ported anytime soon, but theres a bigger problem. Today i started playing with sql ce compact edition to see how it could be used in a client profile environment. How to solve dbproviderfactories section can only appear. Dbproviderfactory serves as the factory for dbconnection, dbcommand and other ado.
Postgresql npgsql and dbproviderfactory solutions experts. Dbprovider profiler using wcf and dbproviderfactory. You can rate examples to help us improve the quality of examples. For example, to create a sqlclientfactory, you can pass getfactory a string with the. To use sqlite database provider, the first step is to install microsoft. Getfactory and firebird embedded i found a solution.
For best results take notes on the cheat sheet provided below as you watch and leave any questions you have. Destructor dbhelper the dbproviderfactory object is disposed. Promontoryprotean opened this issue aug 16, 2015 5 comments labels. I am connecting to an access mde database but i will need to support both oledb and odbc. Is there any plan to add dbproviderfactory support to this package andor vnext in general. The process of obtaining a dbproviderfactory involves passing information about a data provider to the dbproviderfactories class. Dbproviderfactory command parameters solutions experts exchange. Returns a dbconnection object that represents an oracleconnection object.
Net database application development approach, featuring a constant programming interface across different databases. An oracleclientfactory object allows applications to instantiate odp. How to solve dbproviderfactories section can only appear once. Dbproviderfactory class create dbproviders based on configuration information in assembly resource dbproviders. In this post i describe why this can be a problem for libraries that use multiple data providers. Dec 16, 2010 provider agnostic applications do not have direct references to ado. Common, which features a set of base classes that can be shared by any.
Net data provider and return a concrete class known as dbproviderfactory. Dbproviderfactory code relationship with code for creating a. Net core, and its a crucial element for micro orms and dataaccess libraries. The problem with that implementation is the code complexity and. Dbproviderfactory command parameters solutions experts. Theyre created to wrap the lowest common demoninator of ado. This factorypattern implementation is designed to abstract all database access away from the code.
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