vs2015 How to connect to a SQL database

I. Connect to a database in the Tap tool

Two. Copy the server name of the SQL database to VS

Three. Select the database name of the connection

Four. Select the bottom line of the advanced attribute to copy all of the Data Source = desktop-dfopne4; Integrated Security = True

Five. Click Open Web. config to replace the copied string with the ConnectionString quotation mark.

Six. There are two types of connection options available

static string Strcon = "server=desktop-dfopne4;integrated security=sspi;database=library;";
SqlConnection con = new SqlConnection (Strcon);

vs2015 How to connect to a SQL database