![]() 32-bit Oracle Data Access Components (ODAC) 11.2.0.1.2 for Windows Installation Instructions, Setup, and Notes. August 2010. Download includes the following products.Connection Strings - Database Connectionstrings. Finding it hard to remember database connection strings? ![]() Using connection string to connect to various data sources like sql server, msaccess, remote server, placing in app.config file and web.config file. ![]()
Everybody does! You must provide the values in red. ODBC DSNusing System. Data. Odbc. var conn = new Odbc. Connection(). conn. Connection. String =. ![]() Those results are either processed directly, placed in a Data. Set in order to be exposed to the user as needed, combined with data from multiple sources, or remoted between tiers. Uses the System. Data. Sql. Client namespace. NET Framework Data Provider for OLE DBFor data sources exposed by using OLE DB. Uses the System. Data. Ole. Db namespace. NET Framework Data Provider for ODBCFor data sources exposed by using ODBC. Uses the System. Data. Odbc namespace. NET Framework Data Provider for Oracle. For Oracle data sources. The . NET Framework Data Provider for Oracle supports Oracle client software version 8. System. Data. Oracle. Client namespace. Entity. Client Provider. Provides data access for Entity Data Model (EDM) applications. Uses the System. Data. Entity. Client namespace. NET Framework Data Provider for SQL Server Compact 4. Provides data access for Microsoft SQL Server Compact 4. Uses the System. Data. Sql. Server. Ce namespace. Core Objects of . NET Framework Data Providers The following table outlines the four core objects that make up a . NET Framework data provider. The base class for all Connection objects is the Db. Connection class. Command. Executes a command against a data source. Exposes Parameters and can execute in the scope of a Transaction from a Connection. The base class for all Command objects is the Db. Command class. Data. Reader. Reads a forward- only, read- only stream of data from a data source. The base class for all Data. Reader objects is the Db. Data. Reader class. Data. Adapter. Populates a Data. Set and resolves updates with the data source. The base class for all Data. Adapter objects is the Db. Data. Adapter class. In addition to the core classes listed in the table earlier in this document, a . NET Framework data provider also contains the classes listed in the following table. The base class for all Transaction objects is the Db. Transaction class. ADO. NET also provides support for transactions using classes in the System. Transactions namespace. Command. Builder. A helper object that automatically generates command properties of a Data. Adapter or derives parameter information from a stored procedure and populates the Parameters collection of a Command object. The base class for all Command. Builder objects is the Db. Command. Builder class. Connection. String. Builder. A helper object that provides a simple way to create and manage the contents of connection strings used by the Connection objects. The base class for all Connection. String. Builder objects is the Db. Connection. String. Builder class. Parameter. Defines input, output, and return value parameters for commands and stored procedures. The base class for all Parameter objects is the Db. Parameter class. Exception. Returned when an error is encountered at the data source. For an error encountered at the client, . NET Framework data providers throw a . NET Framework exception. The base class for all Exception objects is the Db. Exception class. Error. Exposes the information from a warning or error returned by a data source. Client. Permission. Provided for . NET Framework data provider code access security attributes. The base class for all Client. Permission objects is the DBData. Permission class. NET Framework Data Provider for SQL Server (Sql. Client) The . NET Framework Data Provider for SQL Server (Sql. Client) uses its own protocol to communicate with SQL Server. It is lightweight and performs well because it is optimized to access a SQL Server directly without adding an OLE DB or Open Database Connectivity (ODBC) layer. The following illustration contrasts the . NET Framework Data Provider for SQL Server with the . NET Framework Data Provider for OLE DB. The . NET Framework Data Provider for OLE DB communicates to an OLE DB data source through both the OLE DB Service component, which provides connection pooling and transaction services, and the OLE DB provider for the data source. For distributed transactions, the . NET Framework Data Provider for SQL Server, by default, automatically enlists in a transaction and obtains transaction details from Windows Component Services or System. Transactions. For more information, see Transactions and Concurrency. The . NET Framework Data Provider for OLE DB supports both local and distributed transactions. For distributed transactions, the . NET Framework Data Provider for OLE DB, by default, automatically enlists in a transaction and obtains transaction details from Windows Component Services. For more information, see Transactions and Concurrency. If you must use Jet as a data source for an ASP. NET application, realize that ASP. NET applications connecting to an Access database can encounter connection problems. OLE DB Providers that require support for OLE DB 2. NET Framework Data Provider for OLE DB. This includes the Microsoft OLE DB provider for Exchange and the Microsoft OLE DB provider for Internet Publishing. To access an ODBC data source using ADO. NET, use the . NET Framework Data Provider for ODBC. The following code example shows how to include the System. Data. Ole. Db namespace in your applications. The ODBC data provider supports both local and distributed transactions. For distributed transactions, the ODBC data provider, by default, automatically enlists in a transaction and obtains transaction details from Windows Component Services. For more information, see Transactions and Concurrency. The data provider supports Oracle client software version 8. The data provider supports both local and distributed transactions. For more information, see Transactions and Concurrency. You must reference both the System. Data. dll and the System. Data. Oracle. Client. The following table discusses the advantages and limitations of each . NET Framework data provider. Use of an Access database for a middle- tier application is not recommended. NET Framework ``Data Provider for ODBCRecommended for middle and single- tier applications that use ODBC data sources. NET Framework ``Data Provider for Oracle. Recommended for middle and single- tier applications that use Oracle data sources. Entity. Client Provider The Entity. Client provider is used for accessing data based on an Entity Data Model (EDM). Unlike the other . NET Framework data providers, it does not interact directly with a data source. Instead, it uses Entity SQL to communicate with the underlying data provider. For more information, see Entity. Client and Entity SQL.
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