ADO.NET is a set of classes that expose data access services for .NET Framework programmers. ADO.NET provides a rich set of components for creating distributed, data-sharing applications. It is an integral part of the .NET Framework, providing access to relational, XML, and application data....
.NET Framework 2.0 a introduit de nouvelles classes dans l'espace de noms System.Configuration afin de simplifier l'extraction des chaînes de connexion à partir des fichiers de configuration au moment de l'exécution. Vous pouvez extraire par programme une chaîne de connexion en utilisant ...
Learn about ADO.NET, classes that expose data access services for .NET Framework programmers for creating distributed, data-sharing applications.
再次从工具箱向窗体拖放一个按钮控件,更改按钮控件的Name属性为closeForm,Text属性修改为Close。 In theToolbox, expandData, drag theDataGridViewcontrol to the form, and change the name of the control tostudentClasses. 展开左侧工具箱的数据面板,拖放一个数据表查看器控件到窗体上。更改他的Name属性为stucen...
// uses ADO.NET 2.0 ProviderFactory and base classes // see previous article public static void GetListOfTables(string connectstring_name) { ConnectionStringSettings s = ConfigurationSettings.ConnectionStrings[connectstring_name]; DbProviderFactory f = DbProviderFactories.GetFactory(s.ProviderName); ...
Base Classes and Provider Factory Classes With ADO.NET 2.0, data classes derive from the base classes defined in the System.Data.Common namespace. Developers can create provider-specific instances of these base classes using provider factory classes. Provider factory classes allow generic data ...
NET Create a simple data app by using WPF and Entity Framework Connect to data from a C++ app Create LINQ to SQL classes using O/R Designer Create an n-tier data application Concepts How-to guides Reference Завантажити PDF-файл ...
ADO.NET WINFROM ADO.NET WinForms Introduction ADO.NET is a powerful technology in .NET framework for accessing and manipulating data from different data sources. It provides a set of classes and components that allow developers to connect to databases, execute SQL queries, and retrieve or update...
通过使用 GetFactoryClasses 方法,可以检索有关安装在本地计算机上的所有数据提供程序的信息。 它返回一个名为 DbProviderFactories 的DataTable,其中包含下表中说明的列。 展开表 列序号 列名称 示例输出 说明 0 Name SqlClient Data Provider 数据提供程序的可读名称 1 Description .Net Framework Data Provider for...
此时将在“ADO.NET实体数据模型设计器”窗口中显示School模型。 四、查询实体和关联 在School数据库中查询系 1.在CourseViewer窗体的代码文件的开始处,添加以下using (C#)或Imports (Visual Basic)语句,以引用从School数据库和实体命名空间中创建的模型。 using System.Data.Objects; using System.Data.Objects.Data...