A SqlConnection object represents a unique session to a SQL Server data source. With a client/server database system, it is equivalent to a network connection to the server.

SqlConnection documentation from Microsoft was mentioned in another answer. What is missing is that connection.Close() does not need to be called if used in the following way (example is …

Dec 24, 2024 · We use SqlConnection in a "using" statement. The SqlConnection has a constructor that requires a string reference pointing to the connection string character data.

The SqlConnection class (typically from the Microsoft.Data.SqlClient namespace) in ADO.NET Core is used to establish and manage a session with a SQL Server database.

Feb 2, 2024 · This tutorial demonstrates how to connect to a SQL database on C# using SqlConnection object.

Aug 7, 2024 · When working with databases in C#, one of the essential components is the SqlConnection class. This class allows you to establish a connection to a SQL Server …

The using statement creates a read-only variable of type SqlConnection. You need to call Open () on the SqlConnection instance before using it in an SqlCommand.

The SqlConnection draws an open connection from the connection pool if one is available. Otherwise, it establishes a new connection to an instance of SQL Server.

Jun 7, 2016 · SqlConnection objects let other ADO.NET codes know what database to connect to and how to make the connection. They are instantiated by passing a connection string with a …

Jan 6, 2025 · using (SqlConnection connection = new SqlConnection(conn.ConnectionString)) { //Query used in the code String sql = "SELECT CurrencyCode,Name from Sales.Currency"; …