Here’s a sample code snippet demonstrating how to get the connection string from your ASP.NET web.config file so that you can make a connection to the database.

How to read connection string from web.config in ASP.NET and C# ?

Assume that the connection string name defined in the web.config file is “conn1” , you would get the connection string using the ConnectionManager class.

var connectionStr = System.Configuration.ConfigurationManager.ConnectionStrings["conn1"].ConnectionString;