/// <summary>
/// Loads the fingerprint DLL.
/// </summary>
/// <param name="initType">The type to initialise the driver with.</param>
/// <param name="users">The users that you want to load into the driver.</param>
/// <returns>A message if the DLL failed to load else returns an empty string.</returns>
public string LoadDLL(FingerPrintTemplateDLL.InitTypes initType, List<User> users)
{
string message = "";
try
{
if (this.DLLoaded)
{
message = this.Init(initType, users);
if (!String.IsNullOrWhiteSpace(message))
{
return message;
}
return "";
}
this.DLLoaded = false;
if (!File.Exists("FingerPrint.dll"))
{
return "Cannot find FingerPrint.dll.";
}
_DLLHandle = Assembly.LoadFrom("FingerPrint.dll");
if (_DLLHandle == null) return "Cannot find FingerPrint.dll.";
Type[] DLLTypes = _DLLHandle.GetTypes();
_DLLType = null;
foreach (Type t in DLLTypes)
{
if (!IsSubclassOfRawGeneric(t)) continue;
_miInitBase = t.GetMethod("InitBase", new Type[] { typeof(FingerPrintTemplateDLL.InitTypes), typeof(Dictionary<int, Dictionary<int, byte[]>>), typeof(string).MakeByRefType() });//return bool
_miReadPacket = t.GetMethod("ReadPacket");//return FingerPrintPacket
_miDeInitBase = t.GetMethod("DeInitBase");
if (_miInitBase == null ||
_miReadPacket == null ||
_miDeInitBase == null) continue;
_DLLType = t;
}
if (_DLLType == null)
{
return "Cannot find the entry point for the FingerPrint.dll.";
}
this.DLLoaded = true;
message = this.Init(initType, users);
if (!String.IsNullOrWhiteSpace(message))
{
return message;
}
return "";
}
catch (Exception ex)
{
return "FingerPrint.LoadDLL: " + ex.Message + ".";
}
}
/// <summary>
/// Loads the fingerprint DLL.
/// </summary>
/// <param name="initType">The type to initialise the driver with.</param>
/// <returns>A message if the DLL failed to load else returns an empty string.</returns>
public string LoadDLL(FingerPrintTemplateDLL.InitTypes initType)
{
return LoadDLL(initType, null);
}
/// <summary>
/// Initializes the fingerprint DLL.
/// </summary>
/// <returns>A message if the DLL failed to initialize else returns an empty string.</returns>
private string Init(FingerPrintTemplateDLL.InitTypes initType, List<User> users)
{
string message = "";
object[] args = null;
try
{
_instance = Activator.CreateInstance(_DLLType);
Dictionary<int, Dictionary<int, byte[]>> fingerPrints = new Dictionary<int, Dictionary<int, byte[]>>();
if (users != null)
{
foreach (User usr in users)
{
fingerPrints.Add(usr.ID, new Dictionary<int, byte[]>());
foreach (FingerPrint fp in usr.FingerPrints)
{
fingerPrints[usr.ID].Add(fp.PrintNumber, fp.Print);
}
}
}
args = new object[] { initType, fingerPrints, "" };
bool result = (bool)_miInitBase.Invoke(_instance, args);
if (!result)
{
message = "Failed to initialize \"FingerPrint.dll\".";
if (args != null && args.Length > 2)
{
message += " " + args[2].ToString();
}
return message;
}
return "";
}
catch (Exception ex)
{
message = "Failed To Load \"Includes\\FingerPrint.dll\". " + ex.Message;
}
finally
{
args = null;
}
return message;
}
