ConfigurationManager.OpenMappedExeConfiguration.GetSection() 失败（最近才开始发生）

Question

首先，让我为这个非常长的问题提前道歉——向所有坚持到最后的人致敬！

---

我有一个 C#/.NET 3.5 类库，该类库未安装在 GAC 中，因为该类库是另一个程序 (ArcMap.exe) 的加载项。该程序实际上在启动时将 .dll 从存档中提取到用户的 Local Settings\Application Data 文件夹下的文件夹中，但我可以使用 this.GetType().Assembly.Location 在运行时获取其位置代码>.

在库中，我有一个名为 CustomConfigSection 的类，它在 .config 文件中引用。

该库有一个类，其方法 LoadConfigSection() 使用 ConfigurationManager.OpenMappedExeConfiguration() 从 .config 文件（存储在用户的 Application Data 文件夹中）读取并返回CustomConfigSection——或者应该如此。发生的情况是 GetSection() 抛出一个令人讨厌的 ConfigurationErrorsException ，说它找不到包含我的 CustomConfigSection 的程序集。

令人恼火的是，这两天前还有效。我认为 Windows 更新打破了这一点。我已经回去尝试了我知道工作正常的以前版本的代码，但无济于事。环境中发生了一些变化，而不是我的代码中发生了变化，但无论它发生了什么，现在也发生在其他机器上，所以不仅仅是我！

这是一个示例 .config 文件：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <configSections>
        <section name="customConfigSection" type="TestExeConfigurationFileMapAddin.CustomConfigSection, TestExeConfigurationFileMapAddin, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
    </configSections>
    <customConfigSection>
        <customConfigCollection>
            <customConfig name="asdf" />
            <customConfig name="1234" />
            <customConfig name="jlkjjkljj" />
        </customConfigCollection>
    </customConfigSection>
</configuration>

我用来读取它的代码（正如我在 2 天前提到的那样，它工作得很好）：

    private CustomConfigSection LoadConfigSection()
    {
        ExeConfigurationFileMap configFileMap = new ExeConfigurationFileMap();
        configFileMap.ExeConfigFilename = m_userConfigFilePath;
        Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configFileMap, ConfigurationUserLevel.None);
        CustomConfigSection configSection = config.GetSection("customConfigSection") as CustomConfigSection;
        return configSection;
    }

m_userConfigFilePath 是 .config 文件的有效路径，并且 < code>Configuration 对象的 HasFile 属性为 true。

这是启用 Fusion< 后收到的错误/a> 程序集绑定日志记录：

System.Configuration.ConfigurationErrorsException: An error occurred creating the configuration section handler for customConfigSection: Could not load file or assembly 'TestExeConfigurationFileMapAddin, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. (C:\Documents and Settings\...\Application Data\TestExeConfigurationFileMapAddin\test.config line 4) ---> System.IO.FileNotFoundException: Could not load file or assembly 'TestExeConfigurationFileMapAddin, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
File name: 'TestExeConfigurationFileMapAddin, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
   at System.Configuration.TypeUtil.GetTypeWithReflectionPermission(IInternalConfigHost host, String typeString, Boolean throwOnError)
   at System.Configuration.MgmtConfigurationRecord.CreateSectionFactory(FactoryRecord factoryRecord)
   at System.Configuration.BaseConfigurationRecord.FindAndEnsureFactoryRecord(String configKey, Boolean& isRootDeclaredHere)

Assembly manager loaded from:  C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll
Running under executable  C:\Program Files\ArcGIS\Desktop10.0\Bin\ArcMap.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: User = ...
LOG: DisplayName = TestExeConfigurationFileMapAddin, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
 (Fully-specified)
LOG: Appbase = file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/
LOG: Initial PrivatePath = NULL
Calling assembly : System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a.
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\Program Files\ArcGIS\Desktop10.0\Bin\ArcMap.exe.Config
LOG: Using machine configuration file from C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/TestExeConfigurationFileMapAddin.DLL.
LOG: Attempting download of new URL file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/TestExeConfigurationFileMapAddin/TestExeConfigurationFileMapAddin.DLL.
LOG: Attempting download of new URL file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/TestExeConfigurationFileMapAddin.EXE.
LOG: Attempting download of new URL file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/TestExeConfigurationFileMapAddin/TestExeConfigurationFileMapAddin.EXE.

   --- End of inner exception stack trace ---
   at System.Configuration.BaseConfigurationRecord.FindAndEnsureFactoryRecord(String configKey, Boolean& isRootDeclaredHere)
   at System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject)
   at System.Configuration.BaseConfigurationRecord.GetSection(String configKey, Boolean getLkg, Boolean checkPermission)
   at System.Configuration.Configuration.GetSection(String sectionName)
   at TestExeConfigurationFileMapAddin.Form1.LoadConfigSection() in C:\CSProjects\TestExeConfigurationFileMapAddin\TestExeConfigurationFileMapAddin\Form1.cs:line 46
   at TestExeConfigurationFileMapAddin.Form1.LoadConfig() in C:\CSProjects\TestExeConfigurationFileMapAddin\TestExeConfigurationFileMapAddin\Form1.cs:line 28

Fusion 失败的绑定日志本身：

*** Assembly Binder Log Entry  (7/29/2011 @ 12:46:02 PM) ***

The operation failed.
Bind result: hr = 0x80070002. The system cannot find the file specified.

Assembly manager loaded from:  C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorwks.dll
Running under executable  C:\Program Files\ArcGIS\Desktop10.0\Bin\ArcMap.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: User = ...
LOG: DisplayName = TestExeConfigurationFileMapAddin, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
 (Fully-specified)
LOG: Appbase = file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/
LOG: Initial PrivatePath = NULL
LOG: Dynamic Base = NULL
LOG: Cache Base = NULL
LOG: AppName = NULL
Calling assembly : System.Configuration, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a.
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\Program Files\ArcGIS\Desktop10.0\Bin\ArcMap.exe.Config
LOG: Using machine configuration file from C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\config\machine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/TestExeConfigurationFileMapAddin.DLL.
LOG: Attempting download of new URL file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/TestExeConfigurationFileMapAddin/TestExeConfigurationFileMapAddin.DLL.
LOG: Attempting download of new URL file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/TestExeConfigurationFileMapAddin.EXE.
LOG: Attempting download of new URL file:///C:/Program Files/ArcGIS/Desktop10.0/Bin/TestExeConfigurationFileMapAddin/TestExeConfigurationFileMapAddin.EXE.
LOG: All probing URLs attempted and failed.

显然 ConfigurationManager 正在从错误的位置查找包含我的 CustomConfigSection 的程序集 - 至于原因这只是最近才开始发生的，我不知道，但我确实在 2-3 天前安装了一堆 Windows 更新。我运行的是 Windows XP Pro SP3 32 位。

在没有完全理解所有这些术语的含义的情况下，Fusion 日志给了我希望，我可能能够更改加载上下文或策略以强制它从正确的位置加载程序集。这是真的吗？如果是，又是怎样的呢？

Answer 1

使用 Assembly.LoadFrom() 并处理 AssemblyResolve 事件是关键 - 这个答案为我解决了这个问题。我很想听听专家对此如何运作的想法。