add key 和add name 用法和区别 转

转自http://hi.baidu.com/%D0%C7%B7%C9%D4%C2%C2%E4/home

"

 

  
    

   
     <
   
     configuration
   
     >
   
     


   
     <
   
     appSettings
   
     >
   
     

 
   
     <
   
     add key
   
     =
   
     "
   
     myconfig
   
     "
   
      value
   
     =
   
     "
   
     Data Source=.;Initial Catalog=xbmis;User ID=sa;pwd=:
   
     "
   
     />
   
     

 
   
     <
   
     add key
   
     =
   
     "
   
     crystalIamgeCleaner-AutoStart
   
     "
   
      value
   
     =
   
     "
   
     true
   
     "
   
     />
   
     

 
   
     <
   
     add key
   
     =
   
     "
   
     crystalImageCleaner-Sleep
   
     "
   
     　value
   
     =
   
     "
   
     6000
   
     "
   
      
   
     />
   
     

 
   
     <
   
     add key
   
     =
   
     "
   
     crystalImageCleaner-Age
   
     "
   
      value
   
     =
   
     "
   
     120000
   
     "
   
     />
   
     


   
     </
   
     appSettings
   
     >
   
     


   
     <
   
     connectionStrings
   
     >
   
     

 
   
     <
   
     add name
   
     =
   
     "
   
     XBMISConnectionString
   
     "
   
      connectionString
   
     =
   
     "
   
     Data Source=.;Initial Catalog=XBMIS;Persist Security Info=True;User ID=sa;Password=
   
     "
   
     

 providerName
   
     =
   
     "
   
     System.Data.SqlClient
   
     "
   
      
   
     />
   
     

 
   
     <
   
     connectionStrings
   
     >
  
    

 

在程序集中引用如下：

使用命名空间 System.Configuration 即 using System.Configuration

 

 

  
    

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

得到 Data Source
   
     =
   
     .;Initial Catalog
   
     =
   
     xbmis;User ID
   
     =
   
     sa;pwd
   
     =
   
     :
  
    
  
    

   
      

System.Configuration.ConfigurationManager.ConnectionStrings[
   
     "
   
     XBMISConnectionString
   
     "
   
     ].ConnectionString 

得到 Data Source
   
     =
   
     .;Initial Catalog
   
     =
   
     XBMIS;Persist Security Info
   
     =
   
     True;User ID
   
     =
   
     sa;Password
   
     =
   
     "
   
      
   
     

   
     
providerName
   
     =
   
     "
   
     System.Data.SqlClient
  
    

 

备注：其中引用命名空间 System.Configuration 后 下划线部分可省略掉

<appSettings> 一般用于配置常用值 <connectionStrings> 一般用于配置数据库的连接
并非必须有，这两个值都可以自己写一个xml文件进行配置
只不过在这里也比较方便

"

"

<appSettings> 一般用于配置常用值
<connectionStrings>
一般用于配置数据库的连接
并非必须有，这两个值都可以自己写一个xml文件进行配置
只不过在这里也比较方便

"