By Julian Skinner, Bipin Joshi, Donny Mack, Doug Seven, Fabio Claudio Ferracchiati, Jan Narkiewicz, John McTainsh, Visit Amazon's Kevin Hoffman Page, search results, Learn about Author Central, Kevin Hoffman, , Matthew Milner, Paul Dickenson
ISBN-10: 186100527X
ISBN-13: 9781861005274
ADO.NET is Microsoft's most modern facts entry expertise and, as an essential component of the .NET Framework, is much greater than easily an improve of prior incarnations of ADO. ADO.NET presents an in depth set of .NET periods that facilitate effective entry to facts from a wide number of resources, permit subtle manipulation and sorting of knowledge, and kinds a huge framework in which to enforce inter-application communique and XML internet providers. This publication offers a complete advisor to utilizing ADO.NET, with lots of sensible code examples, large technical details, and a close case learn. even if you're constructing internet functions utilizing ASP.NET, home windows types purposes, or XML internet companies, this publication will enable you make the most of .NET's info entry know-how to greatest impression. This booklet covers: ADO.NET and the .NET Framework utilizing the .NET facts services to create connections and execute instructions utilizing the DataSet to control information ADO.NET and XML utilizing COM Interoperability functionality and safeguard concerns
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Example text
Instead, the SQL Server and OLE DB providers implement SqlConnection and OleDbConnection classes respectively. Data namespace). We'll have a look at how this works in more detail later on in the chapter. The Connection Classes The connection classes are very similar to the ADO Connection object, and like that, they are used to represent a connection to a specific data source. NET needs to connect to a data source in the form of a familiar connection string (just as in ADO). The IDbConnection interface's ConnectionString property holds information such as the username and password of the user, the name and location of the data source to connect to, and so on.
The Connection Classes The connection classes are very similar to the ADO Connection object, and like that, they are used to represent a connection to a specific data source. NET needs to connect to a data source in the form of a familiar connection string (just as in ADO). The IDbConnection interface's ConnectionString property holds information such as the username and password of the user, the name and location of the data source to connect to, and so on. In addition, the connection classes also have methods for opening and closing connections, and for beginning a transaction, and properties for setting the timeout period of the connection a nd for returning the current state (open or closed) of the connection.
Now we need to create a specific SqlConnection, OleDbConnection, etc. object, depending on the data provider. In some ways, this is more analogous to the situation in OLE DB, where our first task was usually to instantiate the OLE DB provider using CoCreateInstance: CoInitialize(NULL); CoCreateInstance(CLSID_MSDASQL, NULL, CLSCTX_INPROC_SERVER, IID_IDBInitialize, (void **) &pIDBInitialize); However, once we'd done this, we used standard interfaces to execute commands against the database. NET the differences between the provider -specific classes are greater, as we have separate classes for the Command, DataReader, and DataAdapter (and so on), too.
Professional ADO.NET by Julian Skinner, Bipin Joshi, Donny Mack, Doug Seven, Fabio Claudio Ferracchiati, Jan Narkiewicz, John McTainsh, Visit Amazon's Kevin Hoffman Page, search results, Learn about Author Central, Kevin Hoffman, , Matthew Milner, Paul Dickenson
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