在DLL'Magick.NET-Q8-x64.Native.dll'中找不到名为'Environment_SetEnv'的入口点 [英] Unable to find an entry point named 'Environment_SetEnv' in DLL 'Magick.NET-Q8-x64.Native.dll'

问题描述

已升级到最新的ImageMagick/Magick.NET(7.0.2.901)，并在本地构建并运行良好，但在服务器上爆炸并出现此错误.

Upgraded to latest ImageMagick / Magick.NET (7.0.2.901), and it built and ran fine locally, but explodes on the server with this error.

在DLL'Magick.NET-Q8-x64.Native.dll'中找不到名为'Environment_SetEnv'的入口点.

Unable to find an entry point named 'Environment_SetEnv' in DLL 'Magick.NET-Q8-x64.Native.dll'.

似乎是一个新问题.从此处的更改说明来看:

Seems to be a new issue. Judging by the change desc here:

https://magick.codeplex.com/discussions/650746

不再需要VC运行时，因此不再需要安装它们-而且，我已经为该库的早期版本安装了2008、2012和2015 VC运行时，效果很好.

The VC Runtimes are no longer required, so installing them wouldn't be the issue - and, I've installed 2008, 2012 and 2015 VC runtimes for prior versions of the library, which worked fine.

IIS中的Windows Server 2008 64位，64位.Net 4.

Windows Server 2008 64-bit, 64-bit .Net 4 in IIS.

当前解决方法是回滚到7.0.0.22，该版本运行无误.

Current workaround is to roll back to 7.0.0.22, which runs without error.

Install-Package Magick.NET-Q8-AnyCPU -Version 7.0.0.22

推荐答案

几个月前，我遇到了这个问题，最终发现了两个单独的原因:

I had this issue a couple months back and eventually found two separate causes:

1. 与先前版本的任何CPU冲突

问题:Magick.NET将本机库缓存在临时目录中，除非它已经存在(

Problem: Magick.NET caches the native library in a temp directory unless it already exists (Relevant source code). Since I had previously tested with the Q8-x64 version (which doesn't test for CPU architecture), the Magick.NET-Q8-x64.Native.dll already existed and was not overwritten.

解决方案:删除本机库的temp目录.在我的Windows版本上，它位于%TEMP%\Magick.NET.{TargetFramework}.{MagickNETVersion}.然后，Q8-AnyCPU版本使用

Resolution: Delete the native library's temp directory. On my version of Windows, it was located at %TEMP%\Magick.NET.{TargetFramework}.{MagickNETVersion}. The Q8-AnyCPU version then extracted a new native library with the Environment_SetEnv method.

缓存目录中权限不足

问题:本机库被缓存在具有限制的执行代码权限的目录中.

Problem: The native library was cached in a directory with restricted permissions for executing code.

解决方案:更改缓存目录的位置.我的解决方案是以下代码.

Resolution: Change the cache directory's location. My solution is the following code.

#if DEBUG
private static bool MagickCacheDirectoryIsSet = false;

public DefaultConstructor()
{
    if (!MagickCacheDirectoryIsSet)
    {
        ImageMagick.MagickAnyCPU.CacheDirectory = @"path\to\more\permissive\directory";
        MagickCacheDirectoryIsSet = true;
    }
}
#endif

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