Attribute control class 2

Code

  [Attributeusage (attributetargets. Property, inherited  =     False  )]
[Comvisible (  True  )]
  Public     Class  Propertykeyattribute: attribute
{
  Public Propertykeyattribute (  Int  Length)
{
  This  . Length  =  Length;
  This  . Nonebuild  =     True  ;
}
  Public  Propertykeyattribute ()
{
  This . Nonebuild  =     True  ;
}

  Public     Int  Length {  Get  ;  Set  ;}
  Public  System. Data. sqldbtype {  Get  ; Set  ;}
  Public     String  Name {  Get  ;  Set  ;}
  Public     Int  Index {  Get  ;  Set ;}
  Public     Bool  Nonebuild {  Get  ;  Set  ;}



  Public     Static     Int  Getlength  <  T >  (  String  Name)
{
Propertykeyattribute ATTR  =  Getpropertykeyattribute  <  T  >  (Name );
  If  (ATTR  ! =     Null  )
 Return  ATTR. length;
  Return     20  ;
}
  Public     Static  System. Data. sqldbtype getsqldbtype  <  T  >  (  String  Name)
{
Propertykeyattribute ATTR =  Getpropertykeyattribute  <  T  >  (Name );
  If  (ATTR  ! =     Null  )
  Return  ATTR. sqldbtype;
  Return  System. Data. sqldbtype. varchar;
}
 Public     Static     Bool  Getnonebuild  <  T  >  (  String  Name)
{
Propertykeyattribute ATTR  =  Getpropertykeyattribute  <  T >  (Name );
  If  (ATTR  ! =     Null  )
  Return  ATTR. nonebuild;
  Return     False  ;
}

  Public     Static    Int  Getlength (  Object  Model,  String  Name)
{
Propertykeyattribute ATTR  =  Getpropertykeyattribute (model, name );
  If  (ATTR  ! =     Null  )
  Return ATTR. length;
  Return     20  ;
}
  Public     Static  System. Data. sqldbtype getsqldbtype (  Object  Model,  String  Name)
{
Propertykeyattribute ATTR  =  Getpropertykeyattribute (model, name );
 If  (ATTR  ! =     Null  )
  Return  ATTR. sqldbtype;
  Return  System. Data. sqldbtype. varchar;
}
  Public     Static     Bool  Getnonebuild ( Object  Model,  String  Name)
{
Propertykeyattribute ATTR  =  Getpropertykeyattribute (model, name );
  If  (ATTR  ! =     Null  )
  Return  ATTR. nonebuild;
  Return    False  ;
}

  # Region  Propertykeyattribute  
  Private     Static  Propertykeyattribute getpropertykeyattribute  <  T  >  (  String  Name)
{
T Model  = (T) activator. createinstance (  Typeof  (T ));
Type type  =     Typeof  (Propertykeyattribute );

Propertyinfo pi  =  Model. GetType (). getproperty (name );
  Object  [] Attributes  =  Pi. getcustomattributes (  False  );
 Foreach  (  Object  O  In  Attributes)
{
  If  (O  Is  Propertykeyattribute)
{
  //  Forcibly convert the obtained attribute to the personattribute  
  Propertykeyattribute Pa  = (Propertykeyattribute) O;
  Return  Pa;
}
}
  Return     Null  ;
}
  Private     Static  Propertykeyattribute getpropertykeyattribute (  Object  Model,  String  Name)
{
 Try  
{
Type type  =     Typeof  (Propertykeyattribute );
Propertyinfo pi  =  Model. GetType (). getproperty (name );
  Object  [] Attributes  =  Pi. getcustomattributes (  False  );
  Foreach (  Object  O  In  Attributes)
{
  If  (O  Is  Propertykeyattribute)
{
  //  Forcibly convert the obtained attribute to the personattribute  
  Propertykeyattribute Pa  =  (Propertykeyattribute) O;
 Return  Pa;
}
}
}
  Catch  
{

}
  Return     Null  ;
}
  # Endregion  


}