C# Programming :: EOF Occurs Early


	EOF Occurs Early I have an interesting problem with file IO, maybe even a bug in the CLR. I call a method that uses an XmlReader to loop through 4 MB XML files and store the text in a database. I select the files in a file select dialog and loop through the filename array, calling the XmlReader method each time. If I input one file, everything works properly. If I input several files, the first file is not read completely. The rest are then processed correctly. It doesn't matter which file is the first file selected, it always results in incomplete data from that file. In fact, it always drops off at the same record each time, about a quarter way through the file. I checked with the debugger, and when the file hits the record where it drops out, the XmlReader reports end of file. Has anyone heard of a similar problem as this? Any ideas how I might fix or workaround the problem? I tried adding a FileStream to the XmlReader but it didn't help. -- Regards, Fred Chateau http://hotelmotelnow.com I got some more information to go with this. You can select four files and all files are processed correctly. Seven or more files causes the first one to drop out early. Does this make sense to anyone because it doesn't make sense to me? The files are being processed one at a time, I think. It's just the filenames that are held in an array until the method is called. -- Regards, Fred Chateau http://hotelmotelnow.com "Fred Chateau" <webmas@hotelmotelnow.com> wrote in message news:%235LCZF9pHHA.1244@TK2MSFTNGP04.phx.gbl... - Hide quoted text - >I have an interesting problem with file IO, maybe even a bug in the CLR. > I call a method that uses an XmlReader to loop through 4 MB XML files and > store the text in a database. I select the files in a file select dialog > and loop through the filename array, calling the XmlReader method each > time. > If I input one file, everything works properly. If I input several files, > the first file is not read completely. The rest are then processed > correctly. It doesn't matter which file is the first file selected, it > always results in incomplete data from that file. In fact, it always drops > off at the same record each time, about a quarter way through the file. > I checked with the debugger, and when the file hits the record where it > drops out, the XmlReader reports end of file. > Has anyone heard of a similar problem as this? Any ideas how I might fix > or workaround the problem? > I tried adding a FileStream to the XmlReader but it didn't help. > -- > Regards, > Fred Chateau > http://hotelmotelnow.com I added back the FileStream in order to see more information about the file in the debugger. When five or more files are selected, the first file shows a different file size than it actually is. -- Regards, Fred Chateau http://hotelmotelnow.com "Fred Chateau" <webmas@hotelmotelnow.com> wrote in message news:eW8r3S$pHHA.2288@TK2MSFTNGP06.phx.gbl... - Hide quoted text - >I got some more information to go with this. > You can select four files and all files are processed correctly. Seven or > more files causes the first one to drop out early. Does this make sense to > anyone because it doesn't make sense to me? The files are being processed > one at a time, I think. It's just the filenames that are held in an array > until the method is called. > -- > Regards, > Fred Chateau > http://hotelmotelnow.com > "Fred Chateau" <webmas@hotelmotelnow.com> wrote in message > news:%235LCZF9pHHA.1244@TK2MSFTNGP04.phx.gbl... >>I have an interesting problem with file IO, maybe even a bug in the CLR. >> I call a method that uses an XmlReader to loop through 4 MB XML files and >> store the text in a database. I select the files in a file select dialog >> and loop through the filename array, calling the XmlReader method each >> time. >> If I input one file, everything works properly. If I input several files, >> the first file is not read completely. The rest are then processed >> correctly. It doesn't matter which file is the first file selected, it >> always results in incomplete data from that file. In fact, it always >> drops off at the same record each time, about a quarter way through the >> file. >> I checked with the debugger, and when the file hits the record where it >> drops out, the XmlReader reports end of file. >> Has anyone heard of a similar problem as this? Any ideas how I might fix >> or workaround the problem? >> I tried adding a FileStream to the XmlReader but it didn't help. >> -- >> Regards, >> Fred Chateau >> http://hotelmotelnow.com Fred Chateau <webmas@hotelmotelnow.com> wrote: > I added back the FileStream in order to see more information about the file > in the debugger. When five or more files are selected, the first file shows > a different file size than it actually is. Without seeing any code, it's going to be virtually impossible to get any further on this. Could you post a short but complete program which demonstrates the problem? See http://www.pobox.com/~skeet/csharp/complete.html for details of what I mean by that. -- Jon Skeet - <s@pobox.com> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet If replying to the group, please do not mail me too -----------------------------------------------Reply----------------------------------------------- I found it. Apparently one of the files (the last file) is shorter than the rest. What I discovered is that when you load multiple files into the OpenFileDialog, no matter what order you select them, apparently the dialog loads them from the smallest file to the largest. Even though the standard filename sorting order is different, it doesn't seem to make any difference. In this case, the file was named xxx014.xml and it loaded before xxx001.xml. -- Regards, Fred Chateau http://hotelmotelnow.com "Jon Skeet [C# MVP]" <s@pobox.com> wrote in message news:MPG.20d067b220959e271bc@msnews.microsoft.com... - Hide quoted text - > Fred Chateau <webmas@hotelmotelnow.com> wrote: >> I added back the FileStream in order to see more information about the >> file >> in the debugger. When five or more files are selected, the first file >> shows >> a different file size than it actually is. > Without seeing any code, it's going to be virtually impossible to get > any further on this. > Could you post a short but complete program which demonstrates the > problem? > See http://www.pobox.com/~skeet/csharp/complete.html for details of > what I mean by that. > -- > Jon Skeet - <s@pobox.com> > http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet > If replying to the group, please do not mail me too