web.config配置文件读取

ConnectionStrings读取：

方法一：

string myConn =System.Configuration.ConfigurationManager.ConnectionStrings["name"].ConnectionString;

方法二：

string connString =System.Web.Configuration.WebConfigurationManager.ConnectionStrings["name"].ToString();

web.config中的配置为：
<configuration>
<connectionStrings>
    <add name="name" connectionString="Data Source=localhost;Initial Catalog=数据库名称;User ID=用户名;Password=密码" />
</connectionStrings>
</configuration>

AppSettings读取：

string myConn = ConfigurationManager.AppSettings["key"].ToString();

web.config中的配置为：
<configuration>
<appSettings>
    <add key="key" value="http://localhost:8080/" />
</appSettings>
</configuration>