C# filesystemwatcher not raising for browser downloads

CopyTo temppath, False Next file ' If copying subdirectories, copy them and their contents to new location. Combine destDirName, subdir. Name DirectoryCopy subdir. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Who owns this outage? Building intelligent escalation chains for modern SRE. Podcast Who is building clouds for the independent developer?

Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. Visit chat. Linked So wouldn't it be an option, that the FileSystemWatcher raises the Changed event when a file was created and the NotifyFilter has the LastWrite flag set?

So we can see the Created event first, followed by the Changed event? From a semantic point of view, it wouldn't be incorrect: file creation means, that there was a write operation, too. The example from above would work. So is FileSystemWatcher: it's a low-level eventing system that simply passes along the events from the OS. The OS is reporting these events, and, in my opinion, applying a heuristic on top that tries to reinterpret them based on a particular series of events would arguably be misleading for various scenarios.

I do understand what you're looking for, but if you want such a heuristic, you can layer that on top of the lower-level events supplied by FSW, and you can do so with basically the same fidelity that we would be able to in the FSW implementation itself.

I can live with that in my particular case. Well, I think that a file creation is a write operation as well, and so I would expect a Changed event, too - that is no heuristic, that is a question of definition. But as you said, if it should simply pass along the OS events, a different behavior or heuristic could be dangerous in a lot of scenarios. Maybe the documentation could be more clear here. Skip to content. Star 7. Quick access.

Search related threads. Remove From My Forums. Asked by:. Archived Forums. Visual C. Sign in to vote. LastAccess NotifyFilters. For example, to watch for changes in the file MyDoc.

You can also watch for changes in a certain type of file. There are several types of changes you can watch for in a directory or file. For example, you can watch for changes in Attributes , the LastWrite date and time, or the Size of files or directories.

This is done by setting the NotifyFilter property to one of the NotifyFilters values. For more information on the type of changes you can watch, see NotifyFilters. You can watch for renaming, deletion, or creation of files or directories. The Windows operating system notifies your component of file changes in a buffer created by the FileSystemWatcher. If there are many changes in a short time, the buffer can overflow. This causes the component to lose track of changes in the directory, and it will only provide blanket notification.

Increasing the size of the buffer with the InternalBufferSize property is expensive, as it comes from non-paged memory that cannot be swapped out to disk, so keep the buffer as small yet large enough to not miss any file change events. To avoid a buffer overflow, use the NotifyFilter and IncludeSubdirectories properties so you can filter out unwanted change notifications.

Please note the following when using the FileSystemWatcher class. In some systems, FileSystemWatcher reports changes to files using the short 8. For example, a change to "LongFileName. This class contains a link demand and an inheritance demand at the class level that applies to all members.

A SecurityException is thrown when either the immediate caller or the derived class does not have full-trust permission. For details about security demands, see Link Demands. The maximum size you can set for the InternalBufferSize property for monitoring a directory over the network is 64 KB. The operating system and FileSystemWatcher object interpret a cut-and-paste action or a move action as a rename action for a folder and its contents.

If you cut and paste a folder with files into a folder being watched, the FileSystemWatcher object reports only the folder as new, but not its contents because they are essentially only renamed.

To be notified that the contents of folders have been moved or copied into a watched folder, provide OnChanged and OnRenamed event handler methods as suggested in the following table.

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