vb.net英文参考文献中英文对照 第3页
Million members of the Friends (friend): Friends million members access modifier for the friend. Million members of the Friends is a special member of this category of members of the same application is transparent, accessible, and for other applications is the prohibition of the visit.
Friends of the protection element (protected friend): the protection of access modifier for members of protected friend, and a friend and protected the level of protection, we can only be in the process of this type or its derived class visit.
Note: By default, do not specify the type of visit will be a statement modifier for the friend. Block in the class, members of the appropriate sentence was a statement for the statement public, private, friend, protected or protected friend. Any statement as private members of class only in the test block visible. Any statements of the members of public not only in the class block is visible on the outside of the code block class is visible. Any statement does not appear by default members of the 原文请找腾讯752018766辣,文-论~文;网
http://www.751com.cn other than domain or constant, they default to private. Public variables serve as a kind of attribute, and use of property shows that the properties of the same statement.
4. To import VB database application
In order to add data to the application process, you can use ADO.Net to create, it provides a set of data access services, can be used for Microsoft SQL Server, Oracle and other data sources and the adoption of OLE DB and XML data source and open access to the line . ADO.Net contains two core control:. Net Framework Data Provider and Data Set.
. Net Framework Data Provider for connecting to the database, the implementation of the command and retrieve the results of two kinds of regular procedures for SQL Server. Net Framework and which are OLE DB.Net Framework through SQL to communicate and connect. We can also order through a number of connect, such as: Connection, Command, Data Reader, Data Adapter to set up a data source connection and data sets, which in the VB and the use of SQL is crucial.
Data Set can be used in a number of different data sources, it can contain tables, table relationships, the main foreign key constraints, etc., you can see them as in-memory data source. In the Data Set can contain multiple objects, multiple objects and objects composed of a number of collections. And a number of tables may exist a number of relations, these relations can be used to indicate the Data Relation object, the object that the main inter-table foreign key relationship. More than a number of relationships between tables.
Use it will generally be divided into several steps: In accordance with the data source used to determine the use. Net Framework Data Provider; to establish connection with the data sources, need to use Connection object; the implementation of the operation of the data source command, usually the SQL command, Command object to use; the use of data sets to obtain data on the operation, to use DataReader, DataSet and other objects; to the user data, need to use the Data Control.
Visual Basic .Net剖析之基础篇
摘要 本文试图对Visual Basic .Net 作深入分析，最终达到在此基础上进一步编辑和扩展此代码之目的。
引言 .Net 技术是微软公司推出的一个全新概念。“它代表了一个集合、一个环境和一个可以作为平台支持下一代Internet有可编程结构。”它的目的就是将互联网作为新一代操作系统的基础，对互联网的设计思想进行扩展。
.Net 的最终目标就是让用户在任何地方，任何时间，利用任何设备都能访问所需的信息、文化和程序。用户不需要知道文件放在什么地方，只需要发出请求，然后就可以接受处理的结果，后台的复杂处理过程对用户而言是透明的。
.Net框架包括公共语言运行库和.Net类库。公共语言运行库是.Net的基础，用户可以将公共语言运行库看做一个在执行时管理代码的代理，它提供核心服务，而且还强制实施严格的类型安全检查，以确保代码运行的安全性和可靠性。事实上，代码管理的概念是运行库的基础原则。以运行库为目标的代码称为托管代码，以运行库为目标的代码称为非托管代码。.Net Framework 的另一个主要部件是类库，它是一个综合性的面向对象的可重用类型集合，用户可以使用它开发包含从传统的命令行或图形用户界面应用程序到基于ASP.Net 所提供的创新的应用程序在内的应用程序。上一页 [1] [2] [3] [4] 下一页
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