In this model , you use a data command object that includes an sql statement or a reference to a stored procedure 在此模型中,可使用包含sql语句或对存储过程的引用的数据命令对象。
As noted , there are some operations , such as executing ddl commands , that you can only accomplish by executing data commands 如前所述,有一些操作只能通过执行数据命令完成,如执行ddl命令。
In this model , you use a tableadapter query or data command that includes an sql statement or a reference to a stored procedure 在此模型中,可使用包含sql语句或对存储过程的引用的tableadapter查询或数据命令。
Data adapters , data connections , data commands , and data readers are the components that make up a . net framework data provider 数据适配器、数据连接、数据命令和数据读取器是组成. net framework数据提供程序的组件。
Contains a collection of data commands and a data connection that are used to communicate with the underlying database and populate a data table 包含一个数据命令的集合和一个数据连接,它们用于与基础数据库通信和填充数据表。
The visual studio . net model of working with explicit instances of data connections , data commands , and datasets is still supported in visual studio 2005 在visual studio 2005中,仍然支持使用数据连接、数据命令和数据集的显式实例的visual studio . net模型。
This is a fundamental choice in xml web services ; even if there are other reasons you might consider using a data command , data exchange with other components almost always means that you should use a dataset 这在xml web services中是基本选择;即使出于其他原因您可以考虑使用数据命令,但与其他组件的数据交换几乎始终意味着您应使用数据集。
If you use a data command and data reader , processing each record as you read it can result in the connection being held open for a long period , which in turn can affect the performance and scalability of your application 如果您使用数据命令和数据读取器,则您一边读取每一记录一边处理它可能导致连接长期保持打开状态,这可能影响您的应用程序的性能和可缩放性。
In the b / s architecture , data connections and data commands are reused in asp pages . the security characteristics of windows nt / 2000 and iis , and roles mechanism of sql server are used to guarantee the security of web database 在系统的b / s部分,讨论了在asp网页中数据连接和数据命令的重用,结合windowsnt 2000与iis的安全机制、 sqlserver的角色管理机制等多种方法实现web数据库的安全性。
Although visual studio 2005 still uses ado . net components for data access , visual studio 2005 pages control data access using data source controls , which encapsulate data connection objects , data command objects , and datasets or data readers 虽然visual studio 2005仍将ado . net组件用于数据访问,但是visual studio 2005页通过使用数据源控件来控制数据访问,这些数据源控件封装了数据连接对象、数据命令对象和数据集或数据读取器。