Скачать или смотреть How to use DataTables better in VB net

DataTable. Data is often stored in tables. And these tables often reside in databases. In the .NET Framework, the DataTable type stores data in memory.
Columns, rows. Used often in VB.NET programs, DataTable has columns and rows properties. DataTable is an in-memory representation of structured data—such as that read from a database.
A program. We define GetTable—this returns a new DataTable. When the GetTable function is invoked, it creates a new DataTable and adds four columns to it.

Columns:These are named with a string argument and a Type argument. They have different types.

GetTable:In a DataTable, each column allows a specific type of data. The GetTable method adds five rows to the DataTable.
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