The DataSet is comprised of one or more DataTable objects, which in turn contain columns and rows collections, and constraints. Well, for one, it is really a virtual, in-memory representation of data and, as such, is a database in its own right. The DataSet class is an ideal component to use for cross-tier communication, a common task that Internet applications and web services must perform. This is where the second primary method for data access enters the scene: the DataSet class. What they don't do well is offer developers a way to optimally manipulate data off of a server.
They are extremely useful at grabbing static result sets quickly from a server and then displaying that data to a user. These classes are optimized for fast, forward-only cursor operations against data. The OleDbCommand class performs that same duty against a wide range of OLE DB compliant data sources. For instance, using the SqlCommand class, you can post SQL commands directly to SQL Server databases.
Command objects, available in different flavors depending on the database engine you are using, are used to execute commands directly against a data store. NET exposes two ways for programmers to interact with relational databases, each optimized for a specific set of circumstances. Question: What looks like a database, can be populated with just a few lines of code, and is inherently disconnected? Answer: A DataSet. NET, we thought we would present what we consider to be the top ten most useful, utterly awesome (and coolest) classes bundled inside the. NET provides us as VB developers is the Framework Class Library (FCL). We get true inheritance, structured exception handling, and a state-of-the-art IDE?but, perhaps the coolest thing. NET, but Visual Basic developers should be the most ecstatic. We believe that Windows developers everywhere have reason to celebrate the arrival of.
Visual basic notepad to listbox accessable software#
NET brings many important advances to the software engineering world.
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