我在 VS2010 中有一个解决方案，其中包含两个项目，一个 ASP.NET MVC3 项目和一个 Windows 服务项目。由于 dll 参考问题，该服务正在崩溃（我在这里查看了类似的问题，似乎没有什么特别相关的）。
Windows 服务遍历目录结构，并创建要由 MVC 站点显示的 html 文件。出于这个原因，我使用 HtmlAgilityPack dll 来创建 html 文件。
在站点的 Global.asax.cs 中，调用了一个方法来检查服务是否已安装，如果没有，它将安装并运行它。这是文件：
using System.ServiceProcess;
using System.Configuration.Install;
using KBDocumentConverterService.Converter;
using KBDocumentConverterService;
namespace Knowledgebase
{
public class MvcApplication : System.Web.HttpApplication
{
...
// Check if service has been stopped, start if it has
void CheckServiceStatus(ServiceController sc)
{
if (sc.Status == ServiceControllerStatus.Stopped)
{
sc.Start();
}
}
// Check if service is installed, install if it has not, then check
// to see if it needs to be started
void TryInstallService()
{
ServiceController sc = ServiceController.GetServices()
.Where(service => service.ServiceName == "KBDocumentConverterService")
.FirstOrDefault();
if (sc == null)
{
// Call static method that will attempt to install service
// and return bool representation of install's success
if (MyServiceInstaller.InstallMe())
{
sc = ServiceController.GetServices()
.Where(service => service.ServiceName == "KBDocumentConverterService")
.FirstOrDefault();
CheckServiceStatus(sc);
}
}
else
{
CheckServiceStatus(sc);
}
}
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RegisterGlobalFilters(GlobalFilters.Filters);
RegisterRoutes(RouteTable.Routes);
TryInstallService();
}
}
}
该服务正在安装到 LocalSystem 帐户；它会安装，它会运行，但是一旦它到达包含对 HtmlAgilityPack dll 的引用的类，它就会抛出一个异常，并包含以下信息：
Could not load file or assembly 'HtmlAgilityPack, Version=1.4.5.0, Culture=neutral, PublicKeyToken=bd319b19eaf3b43a'
or one of its dependencies. The system cannot find the file specified.
KBDocumentConverterService
at KBDocumentConverterService.Converter.ConvertToHtml.CreateContentList()
at KBDocumentConverterService.Converter.ConvertToHtml.RunConversion()
in C:\Documents and Settings\Administrator\My Documents\Dropbox\Programming\CSharp\Websites\Knowledgebase\
KBDocumentConverterService\Converter\ConvertToHtml.cs:line 263
at KBDocumentConverterService.Service1.StartConversion()
in C:\Documents and Settings\Administrator\My Documents\Dropbox\Programming\CSharp\Websites\
Knowledgebase\KBDocumentConverterService\Service1.cs:line 39
如果我为服务创建单独的解决方案并安装它，它将运行良好。当包含在另一个项目的解决方案中时，为什么服务在引用路径（HtmlAgilityPack 文件夹包含在服务项目文件夹中）有困难，我有点茫然。
以下是服务中的相关类 -
用于以编程方式安装的类：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Configuration.Install;
namespace KBDocumentConverterService
{
public static class MyServiceInstaller
{
private static readonly string _exePath = Assembly.GetExecutingAssembly().Location;
public static bool InstallMe()
{
try
{
ManagedInstallerClass.InstallHelper( new string[]{ _exePath } );
}
catch
{
return false;
}
return true;
}
}
}
用于创建 HTML 文件的类以及引用 dll 的位置： using System; 使用 System.Collections.Generic；使用 System.Linq；使用 System.Web；使用 Microsoft.Office；使用 Microsoft.Office.Interop.Word；使用 System.Diagnostics；使用 System.IO；使用 System.Reflection；使用 KBDocumentConverterService.Models；使用 HtmlAgilityPack；
namespace KBDocumentConverterService.Converter
{
public class ConvertToHtml
{
//This creates new object of Word.ApplicationClass
static Microsoft.Office.Interop.Word.Application objWord;
// Directory for files converted from Word docs to Html.
static readonly string _htmlKnowledgeBaseDir = Path.GetPathRoot(Environment.SystemDirectory) +
"\\Knowledgebase\\HTML";
// Directory for Word files to be converted.
static readonly string _docKnowledgeBaseDir = Path.GetPathRoot(Environment.SystemDirectory) +
"\\Knowledgebase\\DOCS";
// Directory for holding the Content List which represents the knowledgebase
// directory and file structure. Will be used to create menu for user to browse
// articles.
static readonly string _htmlContentDir = Path.GetPathRoot(Environment.SystemDirectory) +
"\\Knowledgebase\\Content";
//Path to upload files "Uploaded"
static string strPathToUpload;
//Path to convert uploaded files and save
static string strPathToConvert;
//For filtered HTML Output
static object fltDocFormat = 10;
//Is just to skeep the parameters which are passed as boject reference, these are seems to be optional parameters
static object missing = System.Reflection.Missing.Value;
static object readOnly = false;
//The process has to be in invisible mode
static object isVisible = false;
// List of files that have already been converted to html
static List<string> _htmlKnowledgebaseFiles = new List<string>();
// List of file contained in the folder structure that represents
// a knowledgebase; these files will be converted to html to be
// displayed on a website.
static List<string> _docKnowledgebaseFiles = new List<string>();
static void ConvertDocToHTML(string fileName)
{
try
{
objWord = new Microsoft.Office.Interop.Word.Application();
//To check the file extension if it is word document or something else
string strFileName = Path.GetFileNameWithoutExtension(fileName);
string strExt = Path.GetExtension(fileName);
//Map-path to the folder where html to be saved
strPathToConvert = Path.GetDirectoryName(fileName).Replace("Knowledgebase\\DOCS", "Knowledgebase\\HTML");
object FileName = fileName.Clone();
object FileToSave = strPathToConvert + "\\" + strFileName + ".htm";
if(!File.Exists((string) FileToSave))
{
if (strExt.ToLower().Equals(".doc") || strExt.ToLower().Equals(".docx"))
{
//open the file internally in word. In the method all the parameters should be passed by object reference
objWord.Documents.Open(ref FileName, ref readOnly, ref missing, ref missing, ref missing, ref missing,
ref missing, ref missing, ref missing, ref missing, ref isVisible, ref missing, ref missing, ref missing,
ref missing, ref missing);
//Do the background activity
objWord.Visible = false;
Microsoft.Office.Interop.Word.Document oDoc = objWord.ActiveDocument;
//Save to Html format
oDoc.SaveAs(ref FileToSave, ref fltDocFormat, ref missing, ref missing, ref missing, ref missing,
ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing,
ref missing, ref missing);
}
}
//Close/quit word
((_Application)objWord).Quit();
_htmlKnowledgebaseFiles.Add((string) FileToSave);
}
catch(Exception ex)
{
((_Application)objWord).Quit();
}
}
// Check that knowledgebase folders exist.
static void InitialiseFolders()
{
if(!Directory.Exists(_docKnowledgeBaseDir))
{
Directory.CreateDirectory(_docKnowledgeBaseDir);
}
if(!Directory.Exists(_htmlKnowledgeBaseDir))
{
Directory.CreateDirectory(_htmlKnowledgeBaseDir);
}
if (!Directory.Exists(_htmlContentDir))
{
Directory.CreateDirectory(_htmlContentDir);
}
}
//Initialise lists that contain files to be converted, and converted files.
static void InitialiseFileCollections()
{
// Check if converted document's source still exists. If it does, add to convertedFileNames list,
// otherwise delete it so that the "HTMLKnowledgeBase" structure is consistent with the
// "DOCKnowledgeBase" structure.
try
{
// Get all HTML and HTM files.
string[] convertedFiles = Directory.GetFiles(_htmlKnowledgeBaseDir, "*.*", SearchOption.AllDirectories)
.Where(file => file.ToLower().EndsWith("htm") || file.ToLower().EndsWith("html"))
.ToArray();
// Delete converted file if source does not exist
foreach (string file in convertedFiles)
{
if (!File.Exists(file.Replace("Knowledgebase\\HTML", "Knowledgebase\\DOCS").Replace(".htm", ".doc")) ||
!File.Exists(file.Replace("Knowledgebase\\HTML", "Knowledgebase\\DOCS").Replace(".html", ".doc")) ||
!File.Exists(file.Replace("Knowledgebase\\HTML", "Knowledgebase\\DOCS").Replace(".htm", ".docx")) ||
!File.Exists(file.Replace("Knowledgebase\\HTML", "Knowledgebase\\DOCS").Replace(".html", ".docx")))
{
File.Delete(file);
// Delete folder that contains the content(images etc) for the html files.
if (Directory.Exists(Path.GetDirectoryName(file) + "\\" + Path.GetFileNameWithoutExtension(file) + "_files"))
{
bool deleteFiles = true;
Directory.Delete(Path.GetDirectoryName(file) + "\\" + Path.GetFileNameWithoutExtension(file) + "_files", deleteFiles);
}
}
else
{
_htmlKnowledgebaseFiles.Add(file);
}
}
}
catch (UnauthorizedAccessException uaEx)
{
// To implement
}
catch (IOException ioEx)
{
// To implement
}
// Get all files in the "DOCKnowledgeBase" folder.
string[] filesToConvert = Directory.GetFiles(_docKnowledgeBaseDir, "*.*", SearchOption.AllDirectories)
.Where(file => file.ToLower().EndsWith("doc") || file.ToLower().EndsWith("docx"))
.ToArray();
// Check each file to be converted, if there is no corresponding converted file, add
// to list.
foreach (string file in filesToConvert)
{
if(!_docKnowledgebaseFiles.Contains(file)) _docKnowledgebaseFiles.Add(file);
}
}
// Traverse list of files to be converted and convert.
static void ConvertFiles()
{
foreach (string file in _docKnowledgebaseFiles)
{
if (!File.Exists(file.Replace("Knowledgebase\\DOCS", "Knowledgebase\\HTML").Replace(".doc", ".html")) &&
!File.Exists(file.Replace("Knowledgebase\\DOCS", "Knowledgebase\\HTML").Replace(".docx", ".html")) &&
!File.Exists(file.Replace("Knowledgebase\\DOCS", "Knowledgebase\\HTML").Replace(".doc", ".htm")) &&
!File.Exists(file.Replace("Knowledgebase\\DOCS", "Knowledgebase\\HTML").Replace(".docx", ".htm")))
{
if (!Directory.Exists(Path.GetDirectoryName(file).Replace("Knowledgebase\\DOCS", "Knowledgebase\\HTML")))
{
Directory.CreateDirectory(Path.GetDirectoryName(file).Replace("Knowledgebase\\DOCS", "Knowledgebase\\HTML"));
}
ConvertDocToHTML(file);
}
}
}
static void GenerateHTML(DirectoryModel directory, HtmlDocument listFileDoc, HtmlNode directoryDiv)
{
HtmlNode linkContainerNode = listFileDoc.CreateElement("ul");
foreach (string key in directory.Files.Keys)
{
HtmlNode listItem = listFileDoc.CreateElement("li");
HtmlTextNode textNode = listFileDoc.CreateTextNode(key);
listItem.AppendChild(textNode);
HtmlAttribute id = listFileDoc.CreateAttribute("id", directory.Files[key]);
listItem.Attributes.Add(id);
linkContainerNode.AppendChild(listItem);
}
directoryDiv.AppendChild(linkContainerNode);
HtmlNode subdirectoryNode = listFileDoc.CreateElement("div");
linkContainerNode.AppendChild(subdirectoryNode);
foreach(DirectoryModel subdirectory in directory.Subdirectories)
{
GenerateHTML(subdirectory, listFileDoc, subdirectoryNode);
}
}
// Create and populate html file to represent the existing knowledgebase
// file and directory structure.
static void CreateContentList()
{
string listFilePath = String.Empty;
// If no content list file exists, create it. if one does exist, create an alternative, this version
// will be pulled up by the site, and renamed to replace the orginal content list file. This is to ensure
// there are no errors with the site and this class trying to open the same file.
if (!File.Exists(_htmlContentDir + "\\content_list.htm"))
{
FileStream fs = File.Create(_htmlContentDir + "\\content_list.htm");
listFilePath = _htmlContentDir + "\\content_list.htm";
fs.Close();
}
else
{
FileStream fs = File.Create(_htmlContentDir + "\\content_list_new.htm");
listFilePath = _htmlContentDir + "\\content_list_new.htm";
fs.Close();
}
//Create html document
HtmlDocument listFileDoc = new HtmlDocument();
listFileDoc.Load(listFilePath);
// Create instance of DirectoryModel which will hold knowledgebase directory and file structure
DirectoryModel rootDirectory = DirectoryModel.GenerateDirectoryStructure(_htmlKnowledgeBaseDir);
foreach(DirectoryModel directory in rootDirectory.Subdirectories)
{
HtmlNode directoryDiv = listFileDoc.CreateElement("div");
GenerateHTML(directory, listFileDoc, directoryDiv);
listFileDoc.DocumentNode.ChildNodes.Add(directoryDiv);
}
listFileDoc.Save(listFilePath);
}
public static void RunConversion()
{
InitialiseFolders();
InitialiseFileCollections();
ConvertFiles();
CreateContentList();
}
}
}
以及服务本身：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.IO;
using System.Threading;
using KBDocumentConverterService.Converter;
namespace KBDocumentConverterService
{
public partial class Service1 : ServiceBase
{
Thread conversionThread;
public Service1()
{
InitializeComponent();
this.ServiceName = "KBDocumentConverterService";
}
public string Name
{
get { return this.ServiceName; }
}
protected void StartConversion()
{
try
{
while (true)
{
if(!File.Exists("C:\\Service.txt"))
File.Create("C:\\Service.txt").Close();
ConvertToHtml.RunConversion();
Thread.Sleep(60000);
}
}
catch (Exception ex)
{
StreamWriter sw = File.AppendText("C:\\Service.txt");
string mess = ex.Message + "\n" + ex.InnerException + "\n" + ex.Source + "\n" + ex.StackTrace;
sw.WriteLine(mess);
sw.Flush();
sw.Close();
}
}
protected override void OnStart(string[] args)
{
conversionThread = new Thread(new ThreadStart(StartConversion));
conversionThread.Start();
}
protected override void OnStop()
{
}
}
}
任何援助将不胜感激！