[英]Windows filewatcher service crash on Server 2008
我有一个filewatcher服务,可以读取目录中放置的每个XML文件并在标签上打印内容(Visual Studio 2012,Report Viewer 2010)。 该服务在Windows 8上运行正常,但是在服务器2008 R2上,每次我在目录中复制文件时都会崩溃。
public partial class MyService : ServiceBase
{
public MyService ()
{
InitializeComponent();
GetSourcePath();
}
private void GetSourcePath()
{
RegistryKey myKey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Company\\MyService", false);
if (myKey == null)
{
fsw.Path = @"C:\Source\";
}
else
{
fsw.Path = (string)myKey.GetValue("SourcePath");
}
}
protected override void OnStart(string[] args)
{
base.OnStart(args);
fsw.EnableRaisingEvents = true;
}
protected override void OnPause()
{
base.OnPause();
fsw.EnableRaisingEvents = false;
}
protected override void OnContinue()
{
base.OnContinue();
GetSourcePath();
fsw.EnableRaisingEvents = true;
}
private void fsw_Created(object sender, FileSystemEventArgs e)
{
System.Threading.Thread.Sleep(2000);
ReportViewer reportViewer = new ReportViewer();
reportViewer.ProcessingMode = ProcessingMode.Local;
reportViewer.LocalReport.ReportPath = @"rptLabel.rdlc";
reportViewer.LocalReport.DataSources.Add(new ReportDataSource("DataSet", PrintLabel.GetPrintLabels(e.FullPath)));
reportViewer.RefreshReport();
AutoPrint.Export(reportViewer.LocalReport);
AutoPrint.Print();
}
protected override void OnStop()
{
fsw.EnableRaisingEvents = false;
}
}
这是另一类的代码
public class AutoPrint
{
private static int m_currentPageIndex;
private static IList<Stream> m_streams;
public static Stream CreateStream(string name, string fileNameExtension, Encoding encoding, string mimeType, bool willSeek)
{
Stream stream = new MemoryStream();
m_streams.Add(stream);
return stream;
}
public static void Export(LocalReport report)
{
string deviceInfo =
@"<DeviceInfo>
<OutputFormat>EMF</OutputFormat>
<PageWidth>10cm</PageWidth>
<PageHeight>4cm</PageHeight>
<MarginTop>0</MarginTop>
<MarginLeft>0</MarginLeft>
<MarginRight>0</MarginRight>
<MarginBottom>0</MarginBottom>
</DeviceInfo>";
Warning[] warnings;
m_streams = new List<Stream>();
try
{
report.Render("Image", deviceInfo, CreateStream, out warnings);
}
catch (Exception exc)
{
System.Diagnostics.EventLog.WriteEntry("My Service", DateTime.Now.ToLongTimeString() + " Error rendering print : " + exc.Message);
foreach (Stream stream in m_streams)
{
stream.Position = 0;
}
}
}
public static void Print()
{
PrintDocument printDoc = new PrintDocument();
if(printDoc.PrinterSettings.IsDefaultPrinter) printDoc.PrinterSettings.PrinterName = "Printer Name";
if (m_streams == null || m_streams.Count == 0) System.Diagnostics.EventLog.WriteEntry("MyService", DateTime.Now.ToLongTimeString() + " Error: no stream to print.");
if (!printDoc.PrinterSettings.IsValid)
{
System.Diagnostics.EventLog.WriteEntry("MyService", DateTime.Now.ToLongTimeString() + " Error: cannot find the default printer.");
}
else
{
printDoc.PrintPage += new PrintPageEventHandler(PrintPage);
m_currentPageIndex = 0;
printDoc.Print();
}
}
public static void PrintPage(object sender, PrintPageEventArgs ev)
{
try
{
Metafile pageImage = new Metafile(m_streams[m_currentPageIndex]);
// Adjust rectangular area with printer margins.
Rectangle adjustedRect = new Rectangle(
ev.PageBounds.Left - (int)ev.PageSettings.HardMarginX,
ev.PageBounds.Top - (int)ev.PageSettings.HardMarginY,
ev.PageBounds.Width,
ev.PageBounds.Height);
// Draw a white background for the report
ev.Graphics.FillRectangle(Brushes.White, adjustedRect);
// Draw the report content
ev.Graphics.DrawImage(pageImage, adjustedRect);
// Prepare for the next page. Make sure we haven't hit the end.
m_currentPageIndex++;
ev.HasMorePages = (m_currentPageIndex < m_streams.Count);
}
catch (Exception exc)
{
System.Diagnostics.EventLog.WriteEntry("MyService", DateTime.Now.ToLongTimeString() + " Error rendering print page: " + exc.Message + "Inner exception :" + exc.InnerException );
}
}
}
数据也有一个静态类printLabel,但是在这种情况下没有什么有趣的。 它仅加载数据。 这是来自日志事件的第一条错误消息
应用程序:MyService.exe框架版本:v4.0.30319说明:由于未处理的异常,该进程已终止。 异常信息:System.IO.FileNotFoundException堆栈:在MyService.MyService.fsw_Created(System.Object,System.IO.FileSystemEventArgs)在System.IO.FileSystemWatcher.OnCreated(System.IO.FileSystemEventArgs)在System.IO.FileSystemWatcher.NotifyFileSystemEventArgs System.IO.FileSystemWatcher.CompletionStatusChanged(UInt32,UInt32,System.Threading.NativeOverlapped *)的(Int32,System.String)在System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32,UInt32,System.Threading.NativeOverlapped *)
这是事件日志中的第二条消息
错误的应用程序名称:MyService.exe,版本:1.0.0.0,时间戳:0x51349c1b错误的模块名称:KERNELBASE.dll,版本:6.1.7601.17932,时间戳:0x50327672异常代码:0xe0434352错误偏移量:0x0000c41f错误进程ID:0x2dc4错误应用程序开始时间:0x01ce18d947393653错误的应用程序路径:C:\\ Program Files(x86)\\ Company \\ MyService \\ MyService.exe错误的模块路径:C:\\ Windows \\ syswow64 \\ KERNELBASE.dll报告ID:a27c24e2-84cc-11e2-bb34- 0019992623e2
我制作了与控制台相同的应用程序,它运行完美。也许该服务无权读取文件? 我有人有一个主意...
您正在获取FileNotFoundException
并且正在使用相对路径。 这意味着最可能的问题是您的工作目录错误。 尝试改用绝对路径。
有关更多信息,请参见Windows服务在哪个目录中运行?
我发现了问题。 这是reportviewer2010。安装ReportViewer Service Pack 1之后,看来他不再崩溃了。 崩溃发生在以下行:
ReportViewer reportViewer = new ReportViewer();
我也改变了这一行:
reportViewer.LocalReport.ReportEmbeddedResource = "MyService.rptLabel.rdlc";
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