获取配置文件中的key的value

获取App.config文件的key的value

System.Configuration.ConfigurationManager.AppSettings["keyName"]

获取web.config文件的key的value

ConfigurationManager.AppSettings["keyName"];

获取web.config文件的connectString

ConfigurationManager.ConnectionStrings["connectName"].ConnectionString;

配置文件：

①App.Config

 <?xml version="1.0"?>
 <configuration>
   <configSections>
     <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
       <section name="Quartz_TimerJob.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
     </sectionGroup>
   </configSections>
   <appSettings>
     <add key="keyName" value="key's Value" />
 <!-- 多个key value组合-->
 </appSettings>
 </configuration>

②Web.config

key value部分 同上，没多少差

connectString 部分如下

<connectionStrings>
    <add name="LGFZDataLayer.Properties.Settings.XXConnectionString" connectionString="Data Source=10.***.*.***;Initial Catalog=XX;User ID=sa;Password=12345678" providerName="System.Data.SqlClient" />
  </connectionStrings>