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

{＆＃34;无法加载DLL＆＃39; lib32 \ lzo_32.dll＆＃39;：找不到指定的模块。（HRESULT的例外情况：0x8007007E）＆＃34;}

现在这是奇怪的事情， http://wallaceturner.com/lzo-for-c，我下载了一个示例项目的站点的链接，以了解如何使用c＃.net中的lzo压缩器。当我运行该项目时，它成功运作。除了我在项目中的内容之外，我没有看到任何其他依赖项。 我在两者中使用.Net4.5.2。

以下是该类的完整源代码

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;
        }
    }
}

如果我遗漏任何细节，请告诉我，很乐意提供任何必要的信息。感谢。

Answer 1

我看到dll已包含在项目中，请确保为“复制到输出目录”设置dll的属性＆＃39;如果更新，则复制到＆＃39;。可能他们没有在您的“发布”中创建包含dll的文件夹。文件夹中。

c＃：DLLImport用于特定的dll无法正常工作，虽然示例应用程序显示它正常工作，我该如何解决这个问题？

1 个答案: