. NET: how to obtain the connection string from the configuration file. net configuration file

. NET: how to obtain the connection string from the configuration file. net configuration file
1. Set the configuration file

<Configuration> <! -- Create a connectionStrings under configuration --> <connectionStrings> <! -- Set the name and connection string in a format similar to a key-value pair --> <add name = "connection name" connectionString = "connection string"/> </connectionStrings> </configuration>

 

Ii. Reference assembly

First add reference, System. Configuration

// As for getting the data in the configuration file, there is nothing to say. // Note that the ConnectionStrings [1] indexer starts from 1. // The zeroth item is provided by the system by default. It is useless even if it is obtained. String connStr = ConfigurationManager. ConnectionStrings [1]. ConnectionString;