Vb.net monitor file activity

Gets the collection of all the filters used to determine what files are monitored in a directory. Gets or sets a value indicating whether subdirectories within the specified path should be monitored. Gets or sets the object used to marshal the event handler calls issued as a result of a directory change.

Begins the initialization of a FileSystemWatcher used on a form or used by another component. The initialization occurs at run time.

Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. Releases the unmanaged resources used by the FileSystemWatcher. Releases all resources used by the Component. Releases the unmanaged resources used by the FileSystemWatcher and optionally releases the managed resources.

Ends the initialization of a FileSystemWatcher used on a form or used by another component. Retrieves the current lifetime service object that controls the lifetime policy for this instance.

Returns an object that represents a service provided by the Component or by its Container. Gets the Type of the current instance. Creates a shallow copy of the current Object. Creates a shallow copy of the current MarshalByRefObject object. Raises the Changed event. Raises the Created event. Raises the Deleted event. Raises the Error event. Raises the Renamed event. Returns a String containing the name of the Component , if any. This method should not be overridden.

A synchronous method that returns a structure that contains specific information on the change that occurred, given the type of change you want to monitor. A synchronous method that returns a structure that contains specific information on the change that occurred, given the type of change you want to monitor and the time in milliseconds to wait before timing out.

Occurs when a file or directory in the specified Path is changed. Occurs when a file or directory in the specified Path is created. Occurs when a file or directory in the specified Path is deleted.

Occurs when the component is disposed by a call to the Dispose method. Occurs when the instance of FileSystemWatcher is unable to continue monitoring changes or when the internal buffer overflows. Occurs when a file or directory in the specified Path is renamed. Skip to main content. This browser is no longer supported.

Download Microsoft Edge More info. Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback? Namespace: System. Do something amazing to get the User gasping. Open the log file. Seek to the previous length.

Read to the end. Note the new length of the log file. Examine the text at your leisure. For text files it is usual to use a StreamReader but this doesn't allow random access. You could simply read the file line by line until you reach the desired position.

How big do these logs get? FileStream reads bytes rather than text so you'll then hook up with an Encoding which can convert your array of bytes into a String. Choose the Encoding depending on what character set the log file is written in probably Ascii, maybe Unicode.

Something like the code below, in fact. Seek iPosition, SeekOrigin. Begin oFileStream. Read aBytes, 0, iNumBytes 'Return the new file position and the new text.

Hi again Marc, Ahah! Do you think the FileStream would keep up?? Is there a chance that the file could be locked while you are attempting to read? You'll have to wrap that code up in some error-handling, re-try stuff. Regards, Fergus. Hi Marc, yet again, I'm wondering whether your text section will be written in one go or will it span two or more writes?

If the former, then String. IndexOf will suffice. If the latter then you'll have to cache the text. It's quite an interesting challenge you've got here. Hi Fergus, Are you not afraid with this code that the log file get locked. I was thinking on first copying the logfile and then access, but I am not sure if that is necessary. I hope to see you tomorrow again. Hi Fergus, I saw you discovered it yourself, so see this as not written.

Except of course the last row. Hi Herfried, s x s of bytes in total but not per update I would hope! And s x s of times per day at several times a second.

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