By Matthew MacDonald, Bill Hamilton
Written via specialists at the MicrosoftÂR .NET programming platform, ADO.NET in a Nutshell can provide every thing .NET programmers might want to get a jump-start on ADO.NET expertise or to sharpen their talents even extra. within the culture of O'Reilly's In a Nutshell sequence, ADO.NET in a Nutshell is the main whole and concise resource of ADO.NET info on hand. ADO.NET is the suite of knowledge entry applied sciences within the .NET Framework that builders use to construct functions companies gaining access to relational info and XML. Connecting to databases is a basic a part of such a lot functions, whether or not they are internet, WindowsÂR, allotted, client/server, XML internet providers, or anything solely diverse. yet ADO.NET is considerably assorted from Microsoft's prior facts entry applied sciences - together with the former model of ADO - so even skilled builders have to comprehend the fundamentals of the recent disconnected version ahead of they begin programming with it. present with the .NET Framework 1.1, ADO.NET in a Nutshell bargains one position to appear in case you need assistance with whatever concerning this crucial know-how, together with a connection with the ADO.NET namespaces and item version. as well as being a important reference, this publication presents a concise beginning for programming with ADO.NET and covers quite a few concerns that programmers face whilst constructing net purposes or net companies that depend upon database entry. utilizing C#, this ebook provides genuine international, functional examples to help you positioned ADO.NET to paintings instantly.
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Extra info for ADO.NET in a Nutshell
NET connection string The ODBC connection string resembles the SQL Server and OLE DB connection strings. However, the support for some parameters depends on the ODBC driver used. Typically, an ODBC connection string requires a Data Source parameter (use localhost for the current computer), the Initial Catalog parameter (the database name), and the user id and password parameters. It also requires a Driver setting that indicates the ODBC driver to use, or its data source name (DSN), which associates a symbolic name with a group of database settings that otherwise goes into the connection string.
Connection pooling performance categories Counter Description Current # connection pools Current number of pools. Each pool contains a group of connections that can be reused for different clients. Separate pools will be created for requests with different connection strings or for connections in different transaction contexts. Current # pooled and nonpooled connections The total number of connections, including those in the pool. Current # pooled connections The total number of connections currently in the pool.
To do this, you need Data Definition Language (DDL) commands. SQL defines many basic commands various database vendors use to implement and sometimes extend. These include old standbys such as DROP TABLE and CREATE DATABASE. ADO, the previous generation of data-access technology, had a sibling called ADOX that provided an object-oriented wrapper for the DDL commands. NET doesn't have any such niceties. However, you can still modify table structure or create new tables programmatically; you just have to do it the hard way, by constructing a Command and executing it with the ExecuteNonQuery( ) method.
ADO.NET in a Nutshell by Matthew MacDonald, Bill Hamilton