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This article mainly explains "what are the objects of the ADO.NET class library". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what are the objects of the ADO.NET class library".

There may be many reasons for errors in the ADO.NET class library, but when you encounter an error, you can first check the strings in your program and temporarily set them to "". Give it a try. Maybe he caused the problem.

It provides platform interoperability and scalable data access. ADO.NET enhanced support for connectionless programming mode and support for RICH XML. Because the transmitted data is in XML format, any application that can read XML format can process the data. In fact, the component that accepts the data does not have to be an ADO .NET component, it can be a Microsoft Visual Studio-based solution or any application running on other platforms.

The ADO.NET class library is a set of object-oriented class libraries used to interact with data sources. Typically, the data source is a database, but it can also be a text file, an Excel table, or an XML file. ADO.NET allows you to interact with different types of data sources and databases. However, there is no series of classes related to this to accomplish such work. Because different data sources use different protocols.

Therefore, the corresponding protocol must be adopted for different data sources. Some old data sources use the ODBC protocol, many new data sources use the OleDb protocol, and now there are more and more data sources that can be connected through .NET 's ADO.NET class library.

ADO.NET provides public methods for interacting with data sources, but uses a different set of class libraries for different data sources. These class libraries are called Data Providers and are usually named after the type of protocol and data source with which they interact. Table 1 shows some common data providers, the API prefixes they use, and the types of data sources that allow interaction.

The objects contained in the ADO.NET class library:

The SqlConnection object interacts with the database, and you must connect to it. The connection help indicates the database server, database name, user name, password, and other parameters required to connect to the database. The ADO.NET class library is used by the command object so that you can know which database the command is executing on.

The process of interacting with the database means that you have to specify what you want to happen. This is performed by the command object. You use the command object to send SQL statements to the database. The command object uses the connection object to indicate which database to connect to. You can use the command object alone to execute the command directly, or you can pass a reference to a command object to SqlDataAdapter.

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