- #VISUAL STUDIO SERVER EXPLORER NOT SHOWING ORACLE DATABASE UPDATE#
- #VISUAL STUDIO SERVER EXPLORER NOT SHOWING ORACLE DATABASE CODE#
Table 5-3 Connection MethodsĬhanges the current database for an open connection.Ĭloses the connection to the database.
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Table 5-3 lists the methods common to all connection objects. Gets a combination of values that describes the state of the connection. Gets a string that represents the version of the server to which the object is connected. Gets the name of the database server to which it is connected. Gets the name of the current database after a connection is opened or the database name specified in the connection string before the connection is opened. Gets the time to wait while establishing a connection before terminating the attempt and generating an error. Gets or sets the string used to open the connection. Table 5-2 lists the properties common to all connection objects. However, each connection object contains the same base properties, methods, and events that are inherited from the class. The properties, methods, and events associated with the connection objects in this table vary because each connection object is designed to efficiently connect and interact with its respective data sources. Open database connectivity (ODBC) data sources such as a Data Source Name (DSN) as defined in the ODBC Data Source Administrator dialog box OLE DB data sources (such as Office Access databases through Jet 4.0) Table 5-1 lists the primary connection objects available in ADO.NET and the data sources they are designed to access. The choice is fairly simple because it depends on the back-end data source your application needs to communicate with. The first step is to decide which type of connection object to create.
#VISUAL STUDIO SERVER EXPLORER NOT SHOWING ORACLE DATABASE CODE#
When you do not want to use the visual tools previously described and need to create your connections manually, it is easy to create connection objects in code programmatically. Creating Connection Objects Programmatically In addition to creating a configured connection object, the Data Source Configuration Wizard allows you to select the database objects you want to use in your application.
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When you run the Data Source Configuration Wizard and select the database path, you end up with a configured connection object ready to use in your application. The main wizard for bringing data into an application is the Data Source Configuration Wizard. Visual Studio provides a few wizards that simplify the process of creating applications that access data and that create data connections as a result of completing the wizards. Of course, you can create data connections as part of the development process from within an open project, but that is covered in the next section. Data connections created in Server Explorer are user-specific settings in Visual Studio that display the connections each time you open Visual Studio (instead of creating connections as part of developing a specific application that stores them in that application). In other words, you can create data connections in Server Explorer and access them in any project. To simplify the process of creating applications that access data, Visual Studio provides the Server Explorer window as a central location to manage data connections independent of any actual projects. Essentially, connection objects provide a conduit for sending commands to a database and retrieving data and information into your application, as shown in Figure 5-1.įigure 5-1 Connection objects are your application’s communication pipeline to a database Creating Connections in Server Explorer Although connection objects typically can be thought of as the place where you set your connection string, they have additional methods for working with the connection, such as methods that open and close connections, as well as methods for working with connection pools and transactions. It is merely the pipeline through which commands and queries send their SQL statements and receive results.
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#VISUAL STUDIO SERVER EXPLORER NOT SHOWING ORACLE DATABASE UPDATE#
The easiest way to describe a connection object is, first, to explain what a connection object is not! A connection object does not fetch or update data, it does not execute queries, and it does not contain the results of queries. Configure a connection to a database using the Server Explorer.Ĭonfigure a connection to a database using the Data Source Configuration Wizard.Ĭonfigure a connection to a database using the Connection class.Ĭonnect to a database using specific database connection objects.Įstimated lesson time: 30 minutes What Is a Connection Object?Ī connection object is simply a representation of an open connection to a data source.