Сканировать данные отпечатков пальцев с ZKTeco 9500, проблемы с получением данных, asp.net core api ⇐ C#

[Гость]

Код: Выделить всё

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using libzkfpcsharp;
using System;
using System.Threading;

namespace API.Controllers
{
[Route("api/")]
[ApiController]
public class HomeController : Controller
{
private class ZKTecoReader
{
public byte[] CapturedFingerprintData { get; private set; }
private IntPtr mDevHandle = IntPtr.Zero;
private IntPtr mDBHandle = IntPtr.Zero;
private byte[] FPBuffer;
private int mfpWidth = 256; // Replace with the actual width of the fingerprint image
private int mfpHeight = 288; // Replace with the actual height of the fingerprint image
private bool isCapturing = false;

public bool Initialize(out int errorCode)
{
int ret = zkfp2.Init();
errorCode = ret;
return ret == zkfperrdef.ZKFP_ERR_OK;
}

public bool OpenDevice(int deviceIndex)
{
mDevHandle = zkfp2.OpenDevice(deviceIndex);
return mDevHandle != IntPtr.Zero;
}

public bool InitDB()
{
mDBHandle = zkfp2.DBInit();
return mDBHandle != IntPtr.Zero;
}

public bool StartCapture()
{
FPBuffer = new byte[mfpWidth * mfpHeight];
isCapturing = true;
Thread captureThread = new Thread(DoCapture);
captureThread.IsBackground = true;
captureThread.Start();
return true;
}

public void StopCapture()
{
isCapturing = false;
}

private void DoCapture()
{
try
{
while (isCapturing && CapturedFingerprintData == null)
{
int cbCapTmp = 2048;
byte[] CapTmp = new byte[cbCapTmp];
int ret = zkfp2.AcquireFingerprint(mDevHandle, FPBuffer, CapTmp, ref cbCapTmp);
if (ret == zkfp.ZKFP_ERR_OK)
{
CapturedFingerprintData = CapTmp;
// Handle captured fingerprint data
// You can raise an event, store the data, or perform any desired operations.
}
Thread.Sleep(200);
}

}catch(Exception ex)
{
string x = ex.Message + ex.StackTrace;
}

}

// Add additional methods as needed for enrollment, verification, identification, etc.

public void CloseDevice()
{
StopCapture();
zkfp2.CloseDevice(mDevHandle);
zkfp2.DBFree(mDBHandle);
zkfp2.Terminate();
}
}

private ZKTecoReader reader = new ZKTecoReader();

[HttpGet("readfinger")]
public JsonResult ReadFingerPrint()
{
int errorCode;
bool initialized = reader.Initialize(out errorCode);
if (!initialized)
{
Console.WriteLine($"Failed to initialize the SDK. Error code: {errorCode}");
return Json($"Failed to initialize the SDK.  Error code: {errorCode}");
}

bool deviceOpened = reader.OpenDevice(0);
if (!deviceOpened)
{
Console.WriteLine("Failed to open the device.");
return Json("Failed to open the device.");
}
bool dbInitialized = reader.InitDB();
if (!dbInitialized)
{
Console.WriteLine("Failed to initialize the fingerprint database.");
return Json("Failed to initialize the fingerprint database.");
}
bool captureStarted = reader.StartCapture();
if (!captureStarted)
{
Console.WriteLine("Failed to start capturing fingerprints.");
return Json("Failed to start capturing fingerprints.");
}
// Sleep for a while to capture the fingerprint
Thread.Sleep(5000);
// Access the captured fingerprint data
byte[] capturedFingerprintData = reader.CapturedFingerprintData;
string fingerprintData = Convert.ToBase64String(capturedFingerprintData);

reader.StopCapture();
reader.CloseDevice();
// You can now use the fingerprintData as needed

return Json(new { status = true, message = "Fingerprint captured successfully.", data = fingerprintData });
}
}
}

В этой части возникла проблема:

Код: Выделить всё

          int ret = zkfp2.AcquireFingerprint(mDevHandle, FPBuffer, CapTmp, ref cbCapTmp);

ошибка:

System.AccessViolationException: 'Попытка прочитать или память, защищенная от записи. Часто это указывает на то, что другая память повреждена.


Подробнее здесь: https://stackoverflow.com/questions/766 ... sp-net-cor