Accessing and Updating Data in ASP.NET 2.0: Deleting Data
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on 20 Jun 2007 |
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|A Multipart Series on ASP.NET 2.0's Data Source Controls|
ASP.NET 2.0 introduced a number of new Web controls designed for accessing and modifying data.
These controls allow page developers to declaratively access and modify data without writing any
code to perform the data access. This article is one in a series of articles on ASP.NET 2.0's new data
Data Source Control Basics - explores the concepts
and advantages of data source controls, and compares their usage in ASP.NET 2.0 to data access techniques in ASP.NET 1.x.Accessing Database Data - shows how to use the
SqlDataSource and AccessDataSource controls to query data from a relational database.Filtering Database Data with Parameters - learn how to
retrieve just a subset of database data based on hard-coded values and values from the querystring, other Web controls on the page,
session variables, and so on.Retrieving XML Data with XmlDataSource Control - see how
to retrieve both remote and local XML data and display it in a data Web control.Creating Custom Parameter Controls - learn how
to create your own custom, declarative
Parameter controls for use in the data source controls' parameters collections.Examining the Data Source Control's Events - explore the
events raised during a data source control's lifecycle.Declaratively Caching Data - learn how to cache data
to the data cache simply by setting a couple of data source control properties.Programmatically Accessing Data using the Data Source Controls -
programmatically retrieve, insert, delete, and update data using the SqlDataSource and AccessDataSource controls.Inserting Data - learn how to insert data using
a SqlDataSource control. Also examines how to retrieve the
IDENTITY column value for the just-inserted record.Deleting Data - see how to delete data using
a SqlDataSource control. Also looks at how to programmatically cancel a delete.
(Subscribe to this Article Series!
ASP.NET 2.0's data source and data Web controls make working with data much easier than in previous versions by
allowing for a declarative approach to working with data. In short, the data source controls make it possible to retrieve, insert, update,
and delete data without having to write the tedious dedata access code that was so commonplace in ASP.NET
version 1.x. (A previous installment of this article series examined using the SqlDataSource to insert
data into a database.)
In this article we will focus on using the SqlDataSource control to delete records from a database. Specifically, we will look at three examples:
using a SqlDataSource and a bit of server-side code to delete a record selected from a drop-down list;
and using the GridView Web control's built-in deleting support; and how to programmatically cancel a delete operation. Read on to learn more!
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