Question

我试图像这样在.NetCore 2.1中加载本机库：

[DllImport("kernel32.dll")]
public static extern IntPtr LoadLibrary(string dllToLoad);

[DllImport("kernel32.dll")]
public static extern bool SetDllDirectoryA(string lpPathName);

    ...

SetDllDirectoryA(pathToDll);

var pDll = LoadLibrary(pathToDll+dllName);
if (pDll == IntPtr.Zero)
{
    throw new System.ArgumentException("DLL not found", "pDll");
}

但是函数LoadLibrary始终返回零。 此代码可与.NET Framework完美配合。

我不太确定.NetCore是否支持加载本机库。如果可能的话，正确的方法是什么？

Answer 1

我认为您正在使用32位DLL。在netcore中，无法使用64位进程加载32位DLL。尝试以下代码进行检查：

class Program
    {
        [DllImport("kernel32.dll")]
        public static extern IntPtr LoadLibrary(string dllToLoad);

        static void Main(string[] args)
        {
            if (System.Environment.Is64BitProcess)
            {
                Console.WriteLine("This is 64 bit process");
            }
            var pDll = LoadLibrary("aDLL.dll");
            if (pDll == IntPtr.Zero)
            {
                Console.WriteLine("pDll: " + pDll);
                throw new System.ArgumentException("DLL not found", "pDll");
            }

            Console.WriteLine("pDll: " + pDll);
        }
    }

更新：如果要强制NetCore以x86平板（使用32位DLL）运行。首先从https://dotnet.microsoft.com/download/thank-you/dotnet-sdk-2.1.500-windows-x86-installer下载NetCore x86。然后，您应该通过添加.CSPROJ并将RunCommand更改为x86来编辑PlatformTarget文件：

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
    <Prefer32Bit>false</Prefer32Bit>
    <PlatformTarget>x86</PlatformTarget>
    <Optimize>false</Optimize>
    <RunCommand Condition="'$(PlatformTarget)' == 'x86'">$(MSBuildProgramFiles32)\dotnet\dotnet</RunCommand>
    <RunCommand Condition="'$(PlatformTarget)' == 'x64'">$(ProgramW6432)\dotnet\dotnet</RunCommand>
  </PropertyGroup>

</Project>

在.NetCore 2.1（Windows）中加载本机库

1 个答案: