148 lines
4.7 KiB
C#
148 lines
4.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Web;
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using System.Runtime.InteropServices;
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namespace BLL
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{
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[UnmanagedFunctionPointer(CallingConvention.StdCall)]
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public unsafe delegate void CheckCallBack(
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string label,
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double rongcha
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);
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public class libOpenCV
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{
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[DllImport("LibOpenCV.dll",CallingConvention=CallingConvention.StdCall, CharSet=CharSet.Unicode)]
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private extern static void CheckImage(IntPtr path, [MarshalAs(UnmanagedType.FunctionPtr)] CheckCallBack cb);
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[DllImport("LibOpenCV.dll",CallingConvention=CallingConvention.StdCall)]
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private extern static int TrainImage(IntPtr picpath,IntPtr label);
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public delegate int CheckImageDG(IntPtr imagePath, CheckCallBack ccb);
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public static void DoCheckImage(string picpath, CheckCallBack ccb)
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{
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IntPtr ptrPicPath = mallocIntptr(picpath);
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CheckImage(ptrPicPath,ccb);;// Marshal.GetFunctionPointerForDelegate(ccb));
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Marshal.FreeHGlobal(ptrPicPath);
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}
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public static int DoTrainImage(string picpath, string label)
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{
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int ret = 0;
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IntPtr ptrPicPath = mallocIntptr(picpath);
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IntPtr ptrLabel = mallocIntptr(label);
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ret = TrainImage(ptrPicPath, ptrLabel); ;// Marshal.GetFunctionPointerForDelegate(ccb));
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Marshal.FreeHGlobal(ptrPicPath);
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Marshal.FreeHGlobal(ptrLabel);
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return ret;
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}
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/// <summary>
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/// 根据数据的长度申请非托管空间
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/// </summary>
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/// <param name="strData">要申请非托管空间的数据</param>
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/// <returns>指向非拖管空间的指针</returns>
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private static IntPtr mallocIntptr(string strData)
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{
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//先将字符串转化成字节方式
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Byte[] btData = System.Text.Encoding.Default.GetBytes(strData);
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//申请非拖管空间
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IntPtr m_ptr = Marshal.AllocHGlobal(btData.Length);
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//给非拖管空间清０
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Byte[] btZero = new Byte[btData.Length + 1]; //一定要加1,否则后面是乱码，原因未找到
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Marshal.Copy(btZero, 0, m_ptr, btZero.Length);
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//给指针指向的空间赋值
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Marshal.Copy(btData, 0, m_ptr, btData.Length);
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return m_ptr;
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}
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/// <summary>
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/// 根据长度申请非托管空间
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/// </summary>
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/// <param name="strData">要申请非托管空间的大小</param>
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/// <returns>指向非拖管空间的指针</returns>
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private static IntPtr mallocIntptr(int length)
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{
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//申请非拖管空间
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IntPtr m_ptr = Marshal.AllocHGlobal(length);
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//给非拖管空间清０
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Byte[] btZero = new Byte[length + 1]; //一定要加1,否则后面是乱码，原因未找到
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Marshal.Copy(btZero, 0, m_ptr, btZero.Length);
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//给指针指向的空间赋值
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Marshal.Copy(btZero, 0, m_ptr, length);
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return m_ptr;
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}
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/*
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* 一、IntPtr 与 string互转
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string str = "aa";
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IntPtr init = Marshal.StringToHGlobalAnsi(str);
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string ss= Marshal.PtrToStringAnsi(init);
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//最后释放掉
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Marshal.FreeHGlobal(init);
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二、char*与string互转
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string a = "11";
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char* aChar = (char*)System.Runtime.InteropServices.Marshal.StringToHGlobalAnsi(a).ToPointer();
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string result = Marshal.PtrToStringAnsi((IntPtr)aChar);
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三、char* 与 IntPtr互转
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可以直接强制类型转换
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IntPtr init = (IntPtr)aChar;
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char* aChar = (char*)init;
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*/
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}
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public class DllInvoke
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{
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[DllImport("kernel32.dll", EntryPoint="LoadLibrary", CharSet=CharSet.Ansi,CallingConvention=CallingConvention.StdCall)]
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private extern static IntPtr LoadLibrary(String path);
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[DllImport("kernel32.dll", EntryPoint="GetProcAddress")]
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private extern static IntPtr GetProcAddress(IntPtr lib, String funcName);
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[DllImport("kernel32.dll")]
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private extern static bool FreeLibrary(IntPtr lib);
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[DllImport("kernel32.dll")]
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private extern static IntPtr GetLastError();
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private IntPtr hLib;
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public DllInvoke(String DLLPath)
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{
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hLib = LoadLibrary(DLLPath);
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if (hLib == IntPtr.Zero)
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{
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hLib=GetLastError();
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}
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}
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~DllInvoke()
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{
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FreeLibrary(hLib);
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}
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public Delegate Invoke(String APIName, Type t)
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{
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IntPtr api = GetProcAddress(hLib, APIName);
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return (Delegate)Marshal.GetDelegateForFunctionPointer(api, t);
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}
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}
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} |