Comments by david salaman

david salaman 16-Feb-18 3:41am View

thnx)) your answer is good enough)))but i have no other choice bcz there`s a fingerprint device and i have to deal with methods which it provides. manual of function are in the link file:///C:/Users/jack/Desktop/baha/Biometric%20Device%20SDK-%20Programmers%20Guide.1517824896.pdf

david salaman 13-Feb-18 22:47pm View

Found answer)))))))))))))))))))))

Problem
You have a subclass that uses only a portion of the methods of its superclass (or it's not possible to inherit superclass data).

Solution
Create a field and put a superclass object in it, delegate methods to the superclass object, and get rid of inheritance.

david salaman 13-Feb-18 6:00am View

kk. thnx i really need go back)))

david salaman 13-Feb-18 5:48am View

what i learned about encapsulation. -it is not good to have fields public. MAKE them private and use properties or methods to work with that. that`s all i understood. ssry if taking you time.

david salaman 13-Feb-18 5:42am View

public interface IZKEM
{
[DispId(3)]
bool ClearAdministrators(int dwMachineNumber);
[DispId(4)]
bool DeleteEnrollData(int dwMachineNumber, int dwEnrollNumber, int dwEMachineNumber, int dwBackupNumber);
[DispId(134)]
bool BatchUpdate(int dwMachineNumber);

........

using System.Runtime.InteropServices;

namespace zkemkeeper
{
[CoClass(typeof(CZKEMClass))]
[Guid("102F4206-E43D-4FC9-BAB0-331CFFE4D25B")]
public interface CZKEM : IZKEM, _IZKEMEvents_Event
{
}
}
Now what is purpose of doing this???

public class ZkemClient : IZKEM
{

CZKEM objCZKEM = new CZKEM();

public bool BatchUpdate(int dwMachineNumber)
{
return objCZKEM.BatchUpdate(dwMachineNumber);
}
}
can`t we use the methods in other ways???

david salaman 13-Feb-18 4:50am View

mm thnx))) i learned about data types, classes, abstract, classes, interfaces, properties, acces, modifiers, incapsulation, delegation, events, loops, condition operators but where is it about this one???

david salaman 13-Feb-18 4:38am View

oh thnx for quick reply))). i don`t understand what it is((( explain plzz if you can. what`s going on here:in this code below
public bool Beep(int DelayMS)
{
return objCZKEM.Beep(DelayMS);
}

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