New CallBackToUIThread( AddressOf NotifyUIThreadOfChange), _ Private Sub OnChanged( ByVal source As Object, ByVal e As FileSystemEventArgs) ' FilesystemWatcher event handlers - run on an arbitrary thread Label2.Content = "File: " & e.FullPath & " " & e.ChangeType Public Sub NotifyUIThreadOfChange( ByVal e As FileSystemEventArgs) Watcher.NotifyFilter = (NotifyFilters.LastAccess Or NotifyFilters.LastWrite Or NotifyFilters.FileName Or NotifyFilters.DirectoryName)ĪddHandler watcher.Changed, AddressOf OnChangedĪddHandler watcher.Created, AddressOf OnChangedĪddHandler watcher.Deleted, AddressOf OnChangedĪddHandler watcher.Renamed, AddressOf OnRenamed ' Watch for changes in LastAccess and LastWrite times, and
' Create a new FileSystemWatcher and set its properties. Priva te Sub Button1_Click( ByVal sender As System.Object, ByVal e As ) Handles Button1.Click 'Delegate used to call back to the UI threadĭelegate Sub CallBackToUIThread( ByVal e As FileSystemEventArgs) (Getting close to MS Robocopy's functionality I guess). Intention is to use the change-list to replicate datafiles from one volume to another volume later. My filewatcher class is built so it can be customized to catch changes, and gather more data (if necesarry later) and populate the DataTable with these changes. PrimaryKe圜olumns(0) = table.Columns( "id" ) ' Make the ID column the primary key column. Private Function MakeParentTable() As DataTableĭim table As DataTable = New DataTable( "ParentTable" )Ĭolumn.DataType = ( "System.Int32" )Ĭolumn.DataType = ( "System.String" ) The datatable is defined something like this: And it's flexible enough to manipulating any data coming in & out. This should be scalable enough if I decide to dump it to MSD or SQL later.
I've decided to use a DataTable to maintain "filechanges". It contains a listview (just a "debug" tool for now - but great for learning the In's & out's of WPF+VB). The WPF app automatically fires up the Window1 class as the "startup window" - thats the default behavior when you create an WPF app in VS2008.
#Azure functions filewatcher how to#
So I'm stuck, because Im not able to get the grasp on how to use the Dispatcher for WPF Window1 class, from the FileSystemWatcher. Sample using MsgBox or Console.Writeline - and not WPF UI.
#Azure functions filewatcher code#
My direct problem for now is that when the FileSystemWatcher detects a change, I have found no way of updating the ListView into showing the changes being added to the DataTable.Īnd if I try to the direct aproach - I run into problems with different threads.Īnd all the sample code / how to's on MSDN or the net seem to be either: Maintain a DataBase of the changes, just in memory for now - maybe later for SQL - depedning on the need. Created a FileWatcher class library to be extended later as the needs rises. Created a WPF application in VS2008, to serve as a interface and testbed for my results. Just an App for now - will extend into a WCF later with host & client when I get a grip on things. Create an app to serve as a platform for building a file-change detection, and replicate changes to another server. My goal is to create a mini framework for FileSystemWatcher which I can extend a bit further as the needs raise, aka the "FileTracker" project. I'm in dire need of some help - trying to learn to write WPF, through VS2008 - VB9 and using FileSystemWatcher events. (Im sorry if this thread appears as a duplicate/triplicate in the forum - the other(s) Post thread hung for me - not able to post)
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