C# 调 C++ dll ok

imradv3.sln

@@ -107,8 +107,8 @@ Global
 		{A995A5F1-6A44-463F-9284-A3F058575206}.Debug|x86.Build.0 = Debug|Any CPU
 		{A995A5F1-6A44-463F-9284-A3F058575206}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A995A5F1-6A44-463F-9284-A3F058575206}.Release|Any CPU.Build.0 = Release|Any CPU
-		{A995A5F1-6A44-463F-9284-A3F058575206}.Release|x64.ActiveCfg = Debug|Any CPU
-		{A995A5F1-6A44-463F-9284-A3F058575206}.Release|x64.Build.0 = Debug|Any CPU
+		{A995A5F1-6A44-463F-9284-A3F058575206}.Release|x64.ActiveCfg = Debug|x64
+		{A995A5F1-6A44-463F-9284-A3F058575206}.Release|x64.Build.0 = Debug|x64
 		{A995A5F1-6A44-463F-9284-A3F058575206}.Release|x86.ActiveCfg = Release|Any CPU
 		{A995A5F1-6A44-463F-9284-A3F058575206}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection

src/WpfEditor/Constant.cs

@@ -13,5 +13,15 @@ namespace WpfEditor
         /// 可执行文件所在目录的路径
         /// </summary>
         public static readonly string ExecutablePath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+
+        /// <summary>
+        /// WeChatOcrCpp.dll的路径
+        /// </summary>
+        public static readonly string WeChatOcrDllPath = Path.GetFullPath(Path.Combine(ExecutablePath, "WeChatOcrCpp.dll"));
+
+        /// <summary>
+        /// 当前工作目录（可能是解决方案所在目录）
+        /// </summary>
+        public static readonly string CurrentWorkingDirectory = Directory.GetCurrentDirectory();
     }
 }

src/WpfEditor/MainWindow.xaml.cs

@@ -61,15 +61,15 @@ namespace WpfEditor
         public static (string ImagePath, string JsonPath) get_img_json_pth(string m5)
         {
             // 这是工作目录
-            string pthImg = Path.Combine(Constant.ExecutablePath, "data", "img", $"{m5}.txt"); // .parent_path().parent_path() 在C#中不需要
-            string pthJson = Path.Combine(Constant.ExecutablePath, "data", "json", $"{m5}.json"); // .parent_path().parent_path() 在C#中不需要
+            string pth_img = Path.Combine(Constant.ExecutablePath, "data", "img", $"{m5}.txt"); // .parent_path().parent_path() 在C#中不需要
+            string pth_json = Path.Combine(Constant.ExecutablePath, "data", "json", $"{m5}.json"); // .parent_path().parent_path() 在C#中不需要
 
             // C#中不需要lexically_normal()，Path.GetFullPath可以规范化路径
-            pthImg = Path.GetFullPath(pthImg);
-            pthJson = Path.GetFullPath(pthJson);
+            pth_img = Path.GetFullPath(pth_img);
+            pth_json = Path.GetFullPath(pth_json);
 
             // 使用C# 7.0引入的命名元组返回结果
-            return (ImagePath: pthImg, JsonPath: pthJson);
+            return (ImagePath: pth_img, JsonPath: pth_json);
         }
 
         private void OpenFile_Click(object sender, RoutedEventArgs e)
@@ -89,16 +89,21 @@ namespace WpfEditor
             {
                 string m5 = MD5.ComputeFileHash(openFileDialog.FileName);
 
-                var (pthImg, pthJson) = get_img_json_pth(m5);
+                var (pth_img, pth_json) = get_img_json_pth(m5);
 
-                if (!Path.Exists(pthJson) || !Path.Exists(pthImg))
+                if (!Path.Exists(pth_json) || !Path.Exists(pth_img))
                 {
+
+                    string result = WeChatOcr.RecognizeImage(openFileDialog.FileName);
+                    Console.WriteLine(result);
+
+                    // 应用程序退出时释放资源
+                    WeChatOcr.FreeDll();
+
                     MessageBox.Show("不存在 json 或 image", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                     return;
                 }
 
-                string pth_img = Path.Combine(Constant.ExecutablePath, "data", "img", $"{m5}.txt"); // .parent_path().parent_path() 在C#中不需要
-                string pth_json = Path.Combine(Constant.ExecutablePath, "data", "json", $"{m5}.json");
 
                 try
                 {

src/WpfEditor/Properties/launchSettings.json

@@ -0,0 +1,9 @@
+{
+  "profiles": {
+    "WpfEditor": {
+      "commandName": "Project",
+      "hotReloadEnabled": false,
+      "nativeDebugging": true
+    }
+  }
+}

src/WpfEditor/WeChatOcr.cs

@@ -0,0 +1,127 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace WpfEditor
+{
+    /// <summary>
+    /// 提供与WeChatOcrCpp.dll交互的功能
+    /// </summary>
+    public static class WeChatOcr
+    {
+        // DLL句柄
+        private static IntPtr _wechatOcrDllHandle = IntPtr.Zero;
+
+        // 定义函数委托类型，对应C++中的FunctionPtr
+        [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
+        private delegate IntPtr RecFunctionDelegate(string pthImg);
+
+        // 函数指针
+        private static RecFunctionDelegate _recFunction;
+
+        /// <summary>
+        /// 加载WeChatOcrCpp.dll并获取函数指针
+        /// </summary>
+        /// <returns>是否成功加载</returns>
+        public static bool LoadWeChatOcrDll()
+        {
+            try
+            {
+                // 加载DLL，相当于C++中的LoadLibrary
+                _wechatOcrDllHandle = NativeMethods.LoadLibrary(Constant.WeChatOcrDllPath);
+
+                if (_wechatOcrDllHandle == IntPtr.Zero)
+                {
+                    Console.WriteLine($"无法加载DLL: {Constant.WeChatOcrDllPath}");
+                    return false;
+                }
+
+                // 获取函数地址，相当于C++中的GetProcAddress
+                IntPtr recFuncPtr = NativeMethods.GetProcAddress(_wechatOcrDllHandle, "rec");
+
+                if (recFuncPtr == IntPtr.Zero)
+                {
+                    Console.WriteLine("无法找到函数'rec'");
+                    NativeMethods.FreeLibrary(_wechatOcrDllHandle);
+                    _wechatOcrDllHandle = IntPtr.Zero;
+                    return false;
+                }
+
+                // 将函数指针转换为委托
+                _recFunction = Marshal.GetDelegateForFunctionPointer<RecFunctionDelegate>(recFuncPtr);
+
+                return true;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"加载DLL时出错: {ex.Message}");
+                return false;
+            }
+        }
+
+        /// <summary>
+        /// 调用WeChatOcrCpp.dll中的rec函数进行OCR识别
+        /// </summary>
+        /// <param name="imagePath">图片路径</param>
+        /// <returns>OCR识别结果</returns>
+        public static string RecognizeImage(string imagePath)
+        {
+            if (_wechatOcrDllHandle == IntPtr.Zero || _recFunction == null)
+            {
+                if (!LoadWeChatOcrDll())
+                {
+                    return "DLL未加载或函数未找到";
+                }
+            }
+
+            try
+            {
+                // 调用函数
+                IntPtr resultPtr = _recFunction(imagePath);
+
+                if (resultPtr == IntPtr.Zero)
+                {
+                    return string.Empty;
+                }
+
+                // 将C字符串转换为C#字符串
+                return Marshal.PtrToStringAnsi(resultPtr);
+            }
+            catch (Exception ex)
+            {
+                return $"调用OCR函数时出错: {ex.Message}";
+            }
+        }
+
+        /// <summary>
+        /// 释放DLL资源
+        /// </summary>
+        public static void FreeDll()
+        {
+            if (_wechatOcrDllHandle != IntPtr.Zero)
+            {
+                NativeMethods.FreeLibrary(_wechatOcrDllHandle);
+                _wechatOcrDllHandle = IntPtr.Zero;
+                _recFunction = null;
+            }
+        }
+    }
+
+    /// <summary>
+    /// 提供Windows API的P/Invoke定义
+    /// </summary>
+    internal static class NativeMethods
+    {
+        [DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
+        public static extern IntPtr LoadLibrary(string lpFileName);
+
+        [DllImport("kernel32.dll", SetLastError = true)]
+        public static extern bool FreeLibrary(IntPtr hModule);
+
+        [DllImport("kernel32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
+        public static extern IntPtr GetProcAddress(IntPtr hModule, string lpProcName);
+    }
+}

src/WpfEditor/WpfEditor.csproj

@@ -6,6 +6,7 @@
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <UseWPF>true</UseWPF>
+    <Platforms>x64</Platforms>
   </PropertyGroup>
 
 <ItemGroup>
@@ -15,4 +16,15 @@
   </None>
 </ItemGroup>
 
+  <ItemGroup>
+    <None Include="..\..\x64\Release\*.dll">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      <Link>%(Filename)%(Extension)</Link>
+    </None>
+  </ItemGroup>
+
+<ItemGroup>
+  <ProjectReference Include="..\WeChatOcrCpp\WeChatOcrCpp.vcxproj" />
+</ItemGroup>
+
 </Project>