Applications in Microsoft Visual Studio access the SQL Server database (written in C)

In C #. net, use ADO. Net to obtain data and use ADO. Net to develop database applications.Program. The ADO. Net Class Library provides classes for data connection and data processing. System. the data namespace can communicate with the database through the data provider, ADO.. Net object allows you to connect to the database through components, search, edit, delete, and insert data in the database, and process data in the program.

Ado. Net has two important components: DataSet object and. NET data provider. A DataSet object is used to place a group of data in a program in the form of a table. It does not care about the data source. The data provider contains many components for the data source. Through these components, the designer can connect the program to the specified data source .. NET data provider mainly includes the connection object, command object, datareader object, and dataadapter object.

To create an ADO. NET database application, follow these steps:

1. Create a connection object to connect to the database. Create a command object and execute SQL commands.

2. Create a dataadapter object to exchange data between the data source and record set, and exchange data between the database and the memory.

3. Create a DataSet object, store the data obtained from the data source in the memory, and perform various operations on the data.

4. Create a Windows form, add necessary controls to it, and set properties of various controls.

5. Write events for main controlsCodeTo implement the functions of the program.