从用Excel-DNA构建的Excel .XLL文件解压内容

Question

我不知道你是否知道excel-dna项目，它是一个帮助在excel插件中集成.net汇编和语言的项目。

我的问题是，我想从xll文件中解压一个dll (excel-dna能够将资源打包到xll中)。

我没有加载excel-dna源代码，并且已经在源代码上编写了这个基础：

string xlllib = @"C:\pathtomyxllfile\myaddin.xll";
string xlloutput = @"C:\pathtomyxllfile\myaddin.dll";
var hModule = ResourceHelper.LoadLibrary(xlllib);
var content = ResourceHelper.LoadResourceBytes(hModule, "ASSEMBLY_LZMA", "MYASSEMBLYNAME");

using (BinaryWriter binWriter = new BinaryWriter(File.Open(xlloutput, FileMode.Create)))
        {
            binWriter.Write(content);
        }

但它不起作用。谁有办法从xll中解压一个dll？

提前谢谢你，

Answer 1

我认为您正在尝试将x86 .xll文件加载到x64位进程中。不能混合使用x86和x64位码。相反，请使用LoadLibraryEx函数将.xll文件作为数据文件加载。

下面是一个小的代码示例：

[Flags]
enum LoadLibraryFlags : uint
{
  DONT_RESOLVE_DLL_REFERENCES = 0x00000001,
  LOAD_IGNORE_CODE_AUTHZ_LEVEL = 0x00000010,
  LOAD_LIBRARY_AS_DATAFILE = 0x00000002,
  LOAD_LIBRARY_AS_DATAFILE_EXCLUSIVE = 0x00000040,
  LOAD_LIBRARY_AS_IMAGE_RESOURCE = 0x00000020,
  LOAD_WITH_ALTERED_SEARCH_PATH = 0x00000008
}

internal unsafe static class ResourceHelper
{
  [DllImport("kernel32.dll")]
  public static extern IntPtr LoadLibraryEx(string lpFileName, IntPtr hFile,   LoadLibraryFlags dwFlags);
 // other methods such as LoadResourceBytes go here...
}


string xlllib = @"C:\pathtomyxllfile\myaddin.xll";
string xlloutput = @"C:\pathtomyxllfile\myaddin.dll";
var hModule = ResourceHelper.LoadLibraryEx(xlllib, IntPtr.Zero, LoadLibraryFlags.LOAD_LIBRARY_AS_DATAFILE | LoadLibraryFlags.LOAD_LIBRARY_AS_IMAGE_RESOURCE);

var content = ResourceHelper.LoadResourceBytes(hModule, "ASSEMBLY_LZMA", "YOUR_ASSEMBLY_NAME_WITHOUT_EXTENSION");

using (BinaryWriter binWriter = new BinaryWriter(File.Open(xlloutput, FileMode.Create)))
{
  binWriter.Write(content);
}

霍普，这有帮助。

Answer 2

如果您希望从Excel-DNA外接程序中提取.NET程序集，我编写了一个名为的小实用程序。源代码在GitHub上：https://github.com/augustoproiete/exceldna-unpack

是一个命令行实用程序，用于提取与ExcelDnaPack打包的ExcelDna加载项的内容

​

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Usage: ExcelDna-Unpack.exe [<options>]

Where [<options>] is any of:

--xllFile=VALUE    The XLL file to be unpacked; e.g. MyAddIn-packed.xll
--outFolder=VALUE  [Optional] The folder into which the extracted files will be written; defaults to '.\unpacked'
--overwrite        [Optional] Allow existing files of the same name to be overwritten

Example: ExcelDna-Unpack.exe --xllFile=MyAddIns\FirstAddin-packed.xll
         The extracted files will be saved to MyAddIns\unpacked