Shulou(Shulou.com)06/02 Report--

Today, I would like to talk to you about the features of ASP.NET 2.0 database development, which may not be well understood by many people. in order to make you understand better, the editor has summarized the following for you. I hope you can get something according to this article.

All the demo examples are based on visual web developer 2005 express beta2,visual web developer 2005 express edition beta2, a simple, easy-to-learn and easy-to-use development tool that focuses on Internet application development.

New features of asp.net 2.0 database development:

Compared with previous versions, asp.net 2.0 adds more features, resulting in significant improvements in the areas of developer productivity, management, scalability, and performance.

In terms of development efficiency, asp.net 2.0 basically reduces the amount of code in a typical web application by 70%, and even in some simple programs you can achieve the functions you require without writing any code, the so-called "zero code". This is because asp.net 2.0 encapsulates commonly used web tasks into application services and controls that can be easily reused between websites. Taking advantage of these basic building blocks now requires much less custom code to implement many applications than in previous versions.

At the same time, many new server controls are introduced in asp.net 2.0, which can provide powerful declarative support for data access, login security, wizard navigation, menu, tree view, portal and so on. Many of these controls take advantage of asp.net 's core application services for data access, membership and roles, and personalization scenarios.

New features in version 2.0 are as follows:

Data source controls-asp.net 2.0 introduces declarative data source controls that expose data from back-end storage (such as sql databases, middle-tier business objects, or xml files) to data-bound ui controls on the page. The data source control also exposes functions such as sorting, paging, caching, updating, inserting, and deleting data, which the ui control can take advantage of automatically without code.

New data-bound controls-in addition to the data-bound controls in asp.net version 1.x, asp.net also includes new data-bound ui controls such as gridview, detailsview, formview, treeview, and menu that can be customized to display data in various formats. Gridview, detailsview, and formview controls also automatically take advantage of data source capabilities, making it easy to add sorting, paging, and update operations to data-driven pages.

Data control parameters-data sources can accept input parameters from a variety of sources using the new data control parameter objects in asp.net 2.0. These parameter objects make it easy to provide server control property values, sessions, applications, cookie and querysspaning fields, and user profile properties to parameterized data operations. With these parameters, filtering and master / detail scenarios can be supported with little or no custom code.

Improved data binding syntax-for common scenarios of binding controls in data binding templates, the databinder.eval data binding syntax in asp.net has been simplified. You can also associate two-way data binding with control properties in a template to allow values to be automatically passed to data source update, insert, or delete operations. For hierarchical xml data, asp.net 2.0 also includes a xpath-based data binding syntax.

Using sql express's local file database-to simplify development, asp.net 2.0 now supports the ability to connect to a sql express database as a local file in an application, eliminating the need to provide the database to the server just to perform development work. Of course, you can still connect to a server-based sql database.

ASP.NET 2.0 database development: a detailed introduction to some important data-bound controls and data source controls

Gridview:

This is a new data-bound control in asp.net 2.0.It is a successor to the datagrid control in asp.net 1.x, and many improvements have been made based on it. Although in asp.net 1.x, the datagrid control has been able to satisfy developers to handle some operations through code, such as sorting, paging, editing and deleting data. But when a gridviwe control is bound to a data source control, it can automatically sort, page, edit, and delete data. The gridviwe control also surpasses the datagrid control in function. The gridviwe control can support multiple key fields, has a powerful user customization function on the ui interface, and it also provides a new model for developers to cancel and handle events.

Sqldatasource:

The sqldatasource control represents a data source control that connects to the sql database provider through ado.net. Like other data source controls, sqldatasource controls can be bound to any data-bound control that supports the datasourceid property. At the same time, sqldatasource has the ability to describe itself (such as select, insert, update, delete, sort, etc.), so that data-bound controls can automatically implement the selection, insert, update, delete, sort and other processes when these capabilities are allowed. The sqldatasource control allows you to replace a large amount of ado.net code previously required when creating database connections and implementing queries, because the query operation for this data has been directly specified as a property of the data source control. Because the query of the data still exists in the code of the page, we sometimes call this a dual model.

Sqldatasource controls are usually aimed at small and personal sites that do not need to query a large number of databases. When we develop a website with large data flow, we must use the objectdatasource control, which is a data source control developed for large enterprises bound to middle-tier objects. Data source control

The data source control does not render, but instead represents a specific back-end data store, such as a database, business object, xml file, or xml web services. Data source controls also support rich features for data, such as sorting, paging, filtering, updating, deleting, and inserting, that data-bound ui controls can use automatically.

After reading the above, do you have any further understanding of ASP.NET 2.0 database development features? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.