C＃：一个特定的DLL的DLLImport无法正常工作，尽管一个示例应用程序显示它正常工作，我该如何解决呢？

Question

我正在尝试使用相对路径导入dll

private const string LzoDll32Bit = @"lib32\lzo_32.dll";

    #region Dll-Imports

    [DllImport(LzoDll32Bit, EntryPoint = "lzo_version_string")]
    private static extern IntPtr lzo_version_string32();
    [DllImport(LzoDll32Bit, EntryPoint = "lzo1x_1_compress", CallingConvention = CallingConvention.Cdecl)]
    private static extern int lzo1x_1_compress32(byte[] src, int src_len, byte[] dst, ref int dst_len, byte[] wrkmem);
    [DllImport(LzoDll32Bit, EntryPoint = "lzo1x_decompress", CallingConvention = CallingConvention.Cdecl)]
    private static extern int lzo1x_decompress32(byte[] src, int src_len, byte[] dst, ref int dst_len, byte[] wrkmem);
    [DllImport(LzoDll32Bit, EntryPoint = "__lzo_init_v2", CallingConvention = CallingConvention.Cdecl)]
    private static extern int __lzo_init_v2_32(uint v, int s1, int s2, int s3, int s4, int s5, int s6, int s7, int s8, int s9);

    #endregion

{“无法加载DLL'lib32 \\ lzo_32.dll'：找不到指定的模块。（HRESULT的异常：0x8007007E）“}

现在这是奇怪的东西， http://wallaceturner.com/lzo-for-c ，我下载示例项目的站点的链接，以了解如何在c＃.net中使用lzo压缩器。 当我运行该项目时，它会成功运行。 除了项目中的内容，我没有看到其他依赖项。 我在两个都使用.Net4.5.2。

这是我该课程的完整源代码

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;

namespace TradeAlgo
{
    public class LZOCompressor
    {
        private static TraceSwitch _traceSwitch = new TraceSwitch("Simplicit.Net.Lzo", "Switch for tracing of the LZOCompressor-Class");
        private const string LzoDll32Bit = @"lib32\lzo_32.dll";

        #region Dll-Imports

        [DllImport(LzoDll32Bit, EntryPoint = "lzo_version_string")]
        private static extern IntPtr lzo_version_string32();
        [DllImport(LzoDll32Bit, EntryPoint = "lzo1x_1_compress", CallingConvention = CallingConvention.Cdecl)]
        private static extern int lzo1x_1_compress32(byte[] src, int src_len, byte[] dst, ref int dst_len, byte[] wrkmem);
        [DllImport(LzoDll32Bit, EntryPoint = "lzo1x_decompress", CallingConvention = CallingConvention.Cdecl)]
        private static extern int lzo1x_decompress32(byte[] src, int src_len, byte[] dst, ref int dst_len, byte[] wrkmem);
        [DllImport(LzoDll32Bit, EntryPoint = "__lzo_init_v2", CallingConvention = CallingConvention.Cdecl)]
        private static extern int __lzo_init_v2_32(uint v, int s1, int s2, int s3, int s4, int s5, int s6, int s7, int s8, int s9);

        #endregion

        private byte[] _workMemory = new byte[16384L * 4];

        public LZOCompressor()
        {
            int init = 0;
            init = __lzo_init_v2_32(1, -1, -1, -1, -1, -1, -1, -1, -1, -1);

            if (init != 0)
            {
                throw new Exception("Initialization of LZO-Compressor failed !");
            }
        }

        public byte[] Compress(byte[] src)
        {
            if (_traceSwitch.TraceVerbose)
            {
                Trace.WriteLine(String.Format("LZOCompressor: trying to compress {0}", src.Length));
            }
            byte[] dst = new byte[src.Length + src.Length / 64 + 16 + 3 + 4];
            int outlen = 0;
            lzo1x_1_compress32(src, src.Length, dst, ref outlen, _workMemory);

            if (_traceSwitch.TraceVerbose)
            {
                Trace.WriteLine(String.Format("LZOCompressor: compressed {0} to {1} bytes", src.Length, outlen));
            }
            byte[] ret = new byte[outlen + 4];
            Array.Copy(dst, 0, ret, 0, outlen);
            byte[] outlenarr = BitConverter.GetBytes(src.Length);
            Array.Copy(outlenarr, 0, ret, outlen, 4);
            return ret;
        }

        public byte[] Decompress(byte[] src)
        {
            if (_traceSwitch.TraceVerbose)
            {
                Trace.WriteLine(String.Format("LZOCompressor: trying to decompress {0}", src.Length));
            }
            int origlen = BitConverter.ToInt32(src, src.Length - 4);
            byte[] dst = new byte[origlen];
            int outlen = origlen;
            lzo1x_decompress32(src, src.Length - 4, dst, ref outlen, _workMemory);

            if (_traceSwitch.TraceVerbose)
            {
                Trace.WriteLine(String.Format("LZOCompressor: decompressed {0} to {1} bytes", src.Length, origlen));
            }
            return dst;
        }
    }
}

如果我缺少任何详细信息，请告诉我，我们很乐意提供所需的任何信息。 谢谢。

Answer 1

我看到该项目中包含dll，请确保将“复制到输出目录”的dll属性设置为“如果更新则复制”。 可能是他们没有在“发布”文件夹中创建包含dll的文件夹。