For the first time to write this kind of project, design to from the c + + provides the methods of a struct array

C + + :

 
Struct IPSWINFO 
{
Char * version; 
Int index; 
Char * url; 
Uint64_t totalSize; 
}; 

DLLIMPORT int get_ipsw_files (struct IPSWINFO * * IPSWINFO, int * num); 

C # :
Disclaimer:

 
Public struct IPSWINFO {

///char * 
[MarshalAs (UnmanagedType. LPStr)] 
Public string version; 

///int 
Public int index; 

///char * 
[MarshalAs (UnmanagedType. LPStr)] 
Public string url; 

///uint64_t 
Public long totalSize; 
} 

[DllImport (" idevicerestore. DLL ", CallingConvention=CallingConvention Cdecl)] 
Public static extern int get_ipsw_files (ref IPSWINFO [] ps, ref int num); 

Call:

 
IPSWINFO [] iPSWINFOs; 
NativeMethods. Get_ipsw_files (ref iPSWINFOs, ref j); 

In a program called, can only get the IPSWINFOs array first, should have had two?? !!!!!
To solve the

CodePudding user response:

///uint64_t
Public long totalSize;

Here try public UInt64 totalSize