asp.net data controls
- 2. Bind to many data sources Collections Array HashTable ADO.NET DataReader DataSet XML
- 3. The ADO.NET DataReader to retrieve a read- only, forward-only stream of data from a database. Results are returned as the query executes, and are stored in the network buffer on the client until you request them using the Read method of the DataReader. Datasets store a copy of data from the database tables. However, Datasets can not directly retrieve data from Databases. DataAdapters are used to link Databases with DataSets. If we see diagrammatically. Databases Data Providers DataAdapters DataSets
- 5. DataAdapter is a part of the ADO.NET Data Provider. DataAdapter provides the communication between the Dataset and the Datasource. We can use the DataAdapter in combination with the DataSet Object. That is these two objects combine to enable both data access and data manipulation capabilities. A Data View enables you to create different views of the data stored in a Data Table, a capability that is often used in data-binding applications. Using a DataView, you can expose the data in a table with different sort orders, and you can filter the data by row state or based on a filter expression.
- 6. DataSet Database Authors Connection Authors DataAdapter Select … from Authors
- 7. DataSet Database Authors Connection Publishers DataAdapter Publishers Select … from Publishers
- 8. DataSet Authors DataGrid Repeater Publishers DataList Data View
- 9. Displays data as a table Control over Alternate item Header Footer Colors, font, borders, etc. Paging Updateable Item as row
- 10. List format No default output More control More complexity Item as row Not updateable
- 11. Directional rendering Good for columns Item as cell Alternate item Updateable