mvc code first、db first 数据库链接串区别

<connectionStrings> code first：     connectionString="Data Source=192.168.2.208;     <add name="DBContext" initial catalog=BPMS_2 ; persist security info=True; user id=sa; password=www.123.com; MultipleActiveResultSets=True; App=EntityFramework"   providerName="System.Data.SqlClient"/> </connectionStrings>

<connectionStrings> db first： <add name="BPMS_2Entities" connectionString="metadata=res://*/ModelTEST.csdl|res://*/ModelTEST.ssdl|res://*/ModelTEST.msl; provider=System.Data.SqlClient; provider connection string=&quot; data source=HZB-PC; initial catalog=BPMS_2; user id=sa; password=www.123.com; MultipleActiveResultSets=True; App=EntityFramework&quot;" providerName="System.Data.EntityClient" /> </connectionStrings>