C# 读取web.config配置文件 读取连接字符串

1. <connectionStrings>

<add name="mysql" connectionString="localhost"

providerName="System.Data.SqlClient" />

</connectionStrings>

string s = System.Web.Configuration.WebConfigurationManager.ConnectionStrings["mysql"].ToString();

2. <appSettings>

<add key="mongodb" value="MongoDB:localhost" />

</appSettings>

string s = System.Configuration.ConfigurationManager.AppSettings["mongodb"].ToString();