i running web api asp.net 4.6 app running in cpu mode (though i've tried specifying x64) , makes call unmanaged x64 c dll. works fine when running within visual studio (using default iis express settings) though windows error 126 (the specified module not found.) when deploy server , run in iis or iis express though sure path dll correct. there else can try?
my native methods wrapper:
public static class nativemethods { [dllimport("kernel32.dll", charset = charset.ansi, setlasterror = true)] public static extern intptr loadlibrary(string dlltoload); [dllimport("kernel32.dll", charset = charset.ansi, setlasterror = true)] public static extern intptr getprocaddress(intptr hmodule, string procedurename); [dllimport("kernel32.dll")] public static extern bool freelibrary(intptr hmodule); [dllimport("kernel32.dll", charset = charset.ansi)] public static extern intptr getmodulehandle(string lpmodulename); [dllimport("kernel32.dll")] public static extern uint getlasterror(); } my load dll method:
private static void loaddll() { unloaddll(); //unload module first if (string.isnullorempty(dlldirectory)) throw new applicationexception("dpi dll directory not specified."); if (!file.exists(dllpath)) throw new applicationexception("could not find dpi dll."); pdll = nativemethods.loadlibrary(dllpath); //fails here if (pdll == intptr.zero) throw new applicationexception(string.format("failed load library <{0}> (errorcode: {1})", dllpath, marshal.getlastwin32error())); } let me know if can make else more clear, thanks!
use dependency walker list of module's dependencies (module path dllpath). check need install visual c++ redistributable on server.
by ikenread: need check unmanaged dll compilation mode. if compiled in debug mode, dependent on debug versions of visual c++ redistributable dlls , absent (most likely) on production server.
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