与后台工作者的Windows服务无法加载文件或程序集错误

Question

我正在创建一个Windows服务，它测试是否可以执行预定作业，然后启动后台工作来执行作业。

在windows服务的主线程中，我从位于与windows服务可执行文件相同的目录中的程序集中创建一个数据访问层（DAL）对象。 这有效。

从后台工作者中，我也尝试创建同一个对象的新实例。看起来这是成功的。 DAL中的方法从程序集加载SQL文件，然后针对给定数据库执行。

某处在这个过程中，我得到了以下错误：

System.IO.FileLoadException: Could not load file or assembly 'file:///C:\Windows\system32\DataConnector.dll' or one of its dependencies. The system cannot find the file specified. 
    File name: 'file:///C:\Windows\system32\DataConnector.dll' 
     at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) 
    at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) 
    at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) 
    at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark) 
    at System.Reflection.Assembly.LoadFrom(String assemblyFile) 
    at DataConnector.DatabaseConnector.UpdateDatabase() 

我不知道为什么背景工人试图寻找到了C：\ WINDOWS \ system32 \目录下。

Answer 1

这可能会解决这个问题：

System.IO.Directory.SetCurrentDirectory(System.AppDomain.CurrentDomain.BaseDirectory);