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Data Environment And Designer In the VB application, in addition to using data objects and data control to access the database, you can also use the data environment (Data Environment) to access the database. Data environment is VB 6.0 new features, it uses a graphical way to connect to the database, in a data environments can create multiple connections for connecting to different databases, each connection can create multiple commands, which can create multiple data sources so that you can only create a data environment in the case of different databases for different tables, views, stored procedures or queries visit. The same as ADO control, you can write code to support data access.32361
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In addition, VB 6.0 to provide convenient and practical reporting capabilities, by using Report Designer and data environment, basic without writing code, you can easily use the mouse to drag the shortcut to create data reports, design data report can also preview and directly to the printer to print.
Data Environment:
Data environment is a hierarchical data source. Each data environment can contain a number of connection (Connection), by establishing a different connection to connect to a different database. Each connection contains a number of commands (Command), and each command can also contain Serveral sub-commands. Each command corresponds to the database not only a table, a view or a stored procedure, but also can query designer to create queries. The hierarchical structure of the data environment, users can easily create a hierarchical set of records. For each command, you can also add statistics to group or operation.
Data Environment designer provides an interactive design environment. At design time, you can set the connection and command objects for the value of the event by writing code to respond ADO, execute commands, create a hierarchical structure, you can also drag the Data Environment object to the form or report to create data bound controls.
As can be directly generated by dragging the data-bound controls, which create data in the data environment and data report form is very convenient. VB 6.0 in the data environment is the most powerful, most convenient to use a data source.All objects with the ADO control or bind the controls, and data environment can also be binding, but bound controls and data environment, in addition to set the DataSource and DataField properties, but also with the control is bound to set the order, that is, The data used by the members (DataMember property).
Data Report:
Data Report Designer VB 6.0 to provide a report designer, and VB in the data source object can provide with the use of the mouse drag operation, you can easily create complex reports. Data Report Designer created reports can be printed directly, you can also export the report to HTML or text file.
Data Report is a database application, a very important part. Data were recorded and maintenance work is completed, often need to generate various forms of data reports.
The main function of the database is to store data and provide data, the data is the role of statements retrieved from the database data to a certain format, printed or displayed. For example, payroll reports, sales reports, classroom transcripts, transcripts and so on.
Works in the VB menu, select Add Data Report command in the current project to add a data report. In addition, the system automatically create a data project to create a data report (DataReport) object and added to the project. Created the first data report design object's default name DataReportl. In the project window, double-click the " DataReportl", open the Data Report Designer window.The window contains a page header, detail area and a page footer, which is when the Report Designer to create default display state, in addition, it also includes the report header / report footer, group header / packet footnote.
B.原文的翻译
数据环境与设计者
在VB应用程序中,除了使用数据对象和数据控制访问数据库,您还可以使用数据环境(数据环境)来访问数据库。数据环境是VB 6.0的新功能,它使用一个图形化的方式连接到数据库,数据环境中可以创建多个连接不同的数据库连接,每个连接可以创建多个命令,它可以创建多个数据源,这样你只能创建一个数据环境的不同数据库表、视图、存储过程或查询访问。ADO控件一样,您可以编写代码来支持数据访问。论文网