Interface programming with C#.

1.Define the interface of software (named : IGlobalService),like DB operation, contains: InsertAlarm(string sql),UpdateAlarm(),SearchAlarm().

 

2.Create class like OracleGlobalService to implement the interface of 

IGlobalService.
  The duty of OracleGlobalService is to realize the function of SQL-opeartion Or other functions.

 

3.OracleService ,then we can create another class which our OracleGlobalService can inherite from it,
  because in the OracleService,we may include function like :
    <1>.CheckConnectionStatus()
    <2>.IDBTransaction
    <3>.Commit()
    <4>.RollBack()

 

4.Then,above all,we create a class of OracleGlobalSercice which has method named CreateService,signature like:
       
 public static IGlobalService CreateService()
 {
    string gc=Configuration.AppSettings["FDCOracleService"]; 

    //this   FDCOracleService is get from App.config.
    if (gc.EmptyOrNull())
     {
       gc="FDC.Service.DB.FDCOracleService";
     }
    return (IGlobalService)Activator.CreateInstance(Type.GetType(gc));
 }
   

OracleGlobalService Implement Interface contains : IGlobalService.

OracleGlobalService Inherite from OracleService  : Mainly use the method of CheckConnectionStatus(),IDBTransaction.

 

5.App.config contains :

 
    

 

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