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• FileSystemWatcher Changed event is raised twice

  - by user214707

  I have an application where I am looking for a text file and if there are any changes made to the file I am using the onchanged eventhandler to handle the event. I am using the notifyfilters.Lastwritetime but still the event is getting fired twice.Here is the code. public void Initialize() { FileSystemWatcher _fileWatcher = new FileSystemWatcher(); _fileWatcher.Path = "C:\\Folder"; _fileWatcher.NotifyFilter = NotifyFilters.LastWrite; _fileWatcher.Filter = "Version.txt"; _fileWatcher.Changed += new FileSystemEventHandler(OnChanged); _fileWatcher.EnableRaisingEvents = true; } private void OnChanged(object source, FileSystemEventArgs e) { ....... } I my case the Onchanged is called twice when I change the text file version.txt and save it.Please help.

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• App.Config Ignored After Pre-Build Event

  - by Jake Hulse

  I have a solution with several projects and several developers, each with their own environment (of course). To manage connection strings between each environment, I have created several app.config files for each environment: app.config.dev, app.config.qa, etc. The pre-build event simply copies the app.config.$(ConfigurationName) to app.config. This pre-build event is done for each project in the solution, and the config string is included in each (including the test project). When I use the pre-build events to manage the app.config files, the connection string cannot be found. I can get the tests to run fine by 2 methods: 1. Do not use the pre-build events to manage the app.config file selection, and do it myself or 2. If I check out app.config and make it writable, then the pre-build events work just fine. We are using Visual Studio 2008. I'm down to my last grey hair here, any ideas? Thanks in advance!

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• Passing event args and sender to the RelayCommand

  - by user357163

  How do you get event sender when using RelayCommand?

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• SelectionChanged event binding in Silverlight+MVVM-Light

  - by Budda

  The handler of the "SelectionChanged" event of the ComboBox control has the following signature: void SelectionChangedMethod(object sender, SelectionChangedEventArgs e) How to bind to that property under Silverlight 4 and MVVM-Light to the corresponding method of the ViewModel object? As far as I know, I need to do something like this: public void Changed(Object obj, SelectionChangedEventArgs e) { // .... implement logic here } RelayCommand<Object, SelectionChangedEventArgs> _command; public ICommand ObjectSelectionChanged { get { if (_command == null) { _command = new RelayCommand<Object, SelectionChangedEventArgs>(Changed); } return _command; } } The problem is that RelayCommand class in the MVVM-Light framework doesn't support 2 generic parameters... Is there any solution or workaround for this case? How bind control event to the method with 2 parameters?

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• DataGridView row added event

  - by p4bl0.666

  Hi all, I'm using a DataGridView and I bind a List to the DataSource. I already have the right columns and I map exactly the fields. What I'm trying to do is handling a sort of RowAdded or RowDataBound (like in aspx GridView) event. The only event that I found is RowsAdded but no matter how many items I have, it is fired only 4 times the first time i bound, and twice the other times, with values e.RowCount:1 e.RowIndex:0 e.RowCount:[n-1] e.RowIndex:1 *where n is the number of my items is there a way I can get to a handle for each item?

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• jquery click event handler is called twice for a checkbox

  - by Martin

  I have a problem with the following code in an ASPX page: <script type="text/javascript"> $(document).ready(function() { $('.test').click(function() { alert("click") }) }); </script> <asp:CheckBox runat="server" Text="Checkbox XYZ" CssClass="test" ID="cb1" /> In the browser (FF3.5 / IE8) I have the following problem: if I click the checkbox (the small square), it works as expected if I click the checkbox's text ("Checkbox XYZ"), then the click event is fired twice, and the alert is shown twice I guess this has to do with the way the checkbox is rendered to HTML, which is like this: <span class="test"> <input id="ctl00_c1_cb1" type="checkbox" name="ctl00$c1$cb1" checked="checked" /> <label for="ctl00_c1_cb1">Checkbox XYZ</label> </span> How do I correctly setup the click event handler to prevent it from being called twice?

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• How to run date picker onclick event?

  - by Nitz

  Hey Guys I am using this date picker from jqueryui. If see on that page, then u will find that they have just written in one function...means this... $(function() { $("#datepicker").datepicker(); }); </script> But i want to open my date picker on one text box click event. so i have written this $("#datepicker").datepicker(); in one function which i am calling on textbox onclick event. but in this there is one problem coming.. i am only get date picker on second time click on text box. if i click first time after page load then date picker will not come but as soon as i click second time then date picker is coming? WHY? AND CAN I DO IT ON FIRST CLICK? yes i know this already happening perfect if i put first code but i want it on my function.

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• Javascript event chaining / binding

  - by Charlie Brown

  I have a select list which has a function with a jQuery .post bound on the change() event. <select id="location"> <option value="1"></option> <option value="2"></option> </select> $('#location').change(location_change); function location_change(){ var url = ''; $.post(url, callback); } What I would like to happen is other controls on the page can bind to the $.post callback function like it was an event, so after the location is changed the data is posted back to the server and once the post returns successfully, the subscriber events are fired.

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• ExceptionPolicy.HandleException does not install Event Source for Logging in Registry if XBAP run ou

  - by Neo

  I am using the Logging Application Block (of Microsoft Enterprise Library) to log exceptions in the Event Viewer that occur in my WPF XBAP application. If I run the XBAP in the debugger from Visual Studio, an Event Source entry for my application is automatically created in the Registry at: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\MyApp This occurs at the point ExceptionPolicy.HandleException() is called. However, if I run the XBAP outside of the IDE directly from the file system or from its published location, the Registry entry isn't added. Therefore, no logging takes place. I can only assume this is a security issue with running XBAP applications and they do not have access to write to the Registry. Is this a setting within my project? Any idea on why this might be happening? Any help much appreciated.

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• FileSystemWatcher Changed event is raised twice

  - by user214707

  I have an application where I am looking for a text file and if there are any changes made to the file I am using the OnChanged eventhandler to handle the event. I am using the NotifyFilters.LastWriteTime but still the event is getting fired twice. Here is the code. public void Initialize() { FileSystemWatcher _fileWatcher = new FileSystemWatcher(); _fileWatcher.Path = "C:\\Folder"; _fileWatcher.NotifyFilter = NotifyFilters.LastWrite; _fileWatcher.Filter = "Version.txt"; _fileWatcher.Changed += new FileSystemEventHandler(OnChanged); _fileWatcher.EnableRaisingEvents = true; } private void OnChanged(object source, FileSystemEventArgs e) { ....... } In my case the OnChanged is called twice, when I change the text file version.txt and save it.

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• is right click an javascript event?

  - by Brian

  Is right click an javascript event? If so, how do I use it?

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• Create Event Handler for TreeViewItem in WPF

  - by nihi_l_ist

  Im adding items to TreeView control via ItemsSource property and ItemTemplate property to set the template for TreeViewItem. How can i add an event handler to handle selection change event on TreeViewItems? For now my ItemTemplate looks like this: <Window.Resources><DataTemplate x:Key="PeerDetailTemplate"> <TextBlock Text="{Binding DESCRIPTION}" Tag="{Binding ID}" GotFocus="GetModules"/> </DataTemplate></Window.Resources> But it doesnt work (GetModules is not called). Im new to WPF, so show me the right direction to do such things, please.

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• Perl: Event-driven Programming

  - by Shiftbit

  Is there any POSIX signals that I could utilize in my perl program to create event-driven programming? Currently I have multi-process program that is able to cross communicate but my parent thread is only able to listen to listen at one child at a time. foreach (@threads) { sysread(${$_}{'read'}, my $line, 100); chomp($line); print "Parent hears: $line\n"; } The problem is that the parent sits in a continual wait state until it receives it a signal from the first child before it can continue on. I am relying on 'pipe' for my intercommunication. My current solution is very similar to: http://stackoverflow.com/questions/2558098/how-can-i-use-pipe-to-facilitate-interprocess-communication-in-perl If possible I would like to rely on a $SIG{...} event or any non-CPAN solution.

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• FLEX, Actionscript: 2 questions about mouseOver event and image scaling

  - by Patrick

  hi, 1) if I create items in a for loop, is correct to add a new eventListener for each item ? Or should I add only 1 eventListener to the parent ? and call the event through ID ? 2) if I want to scale my item, (a LinkButton with icon image), I noticed that the icon is sometimes resized with delay, so I have a bit of flickering when I trigger the event. Should I not use icons, and set the image in another way ? How can I fix this ? thanks

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• How to Use JQuery Click Event on Button in an AJAX Form

  - by dpierre23

  I admittedly don't know much about JQuery but I have an AJAX page where I need to trigger a click event when someone clicks a button, but because the button is not there on the initial page load, I'm having issues using the click event. In my code, I just want to run a function when a button is clicked. <script type="text/javascript"> //Run function when button is clicked $(document).ready(function() { $("#idOfButton").click(function() { doSomething(); }); }); //The function I want ran when page visitor clicks button function doSomething() { //Do Something } </script> Obviously this code doesn't work, but any suggestions on how to use .click? I'm only able to insert JS via a tag management system, so I can't hard code anything into the page. Also, the JQuery version is 1.4, so I can't use .on. Thanks for your help.

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• [WPF]ItemsControl not completely loaded @Loaded event

  - by Kaare

  Hi everyone I have a propably simple problem, that i just can't seem to figure out: I've made an ItemsControl which has its datacontext set and shows the data as pairs of Checkboxes and TextBlocs: <ItemsControl Name="listTaskTypes" Grid.Row="1" Grid.Column="2" Grid.RowSpan="2" ItemsSource="{Binding}" Margin="10,0,0,0" VerticalAlignment="Top" Loaded="listTaskTypes_Loaded"> <ItemsControl.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal"> <CheckBox Name="checkBoxTypeId" Tag="{Binding Path=TaskTypeID}"/> <TextBlock FontSize="11pt" FontFamily="Helvetica" Text="{Binding Path=Text}" /> </StackPanel> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl> My problem is that in the Loaded event of the ItemsControl, the checkboxes does not exist yet. How can i get an event when the ItemsControl is completely loaded or is this not possible?

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• WPF: How to get the event when one FrameworkElement comes in contact with other FrameworkElement

  - by Raghav

  I am developing a small application with images and trash box icon on right hand bottom. I have multiple images floating in the main window, and using mouse I can move image from one corner to other corner of window, left, right, top and bottom. I can't figure out how do I catch an event when a image touches and panel (with trash box image), in the right hand corner. Does anybody knows which event or handler to listen? This is not a drag and drop case since my images are floating so no point using drag and drop. Thank you

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• Java - AWT / Swing - handling the Event Descriptor Thread

  - by waitinforatrain

  Hi, I have a question about the 'Event Descriptor Thread'. I have a Main class that is also a JFrame. It initialises the rest of the components in the code, some of them do not involve Swing and some of them do. Is it enough to simply initialise the Main class using the EDT like this?... public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { new Main(); } }); } This way everything would run on the Event Dispatcher thread.

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• Click event to a Gwt-connector

  - by sprasad12

  Hi, I am trying to add click event to one of the widgets that use gwt-connector. Here is the code: public class Diagrams extends Diagram implements HasClickHandlers{ public Diagrams(AbsolutePanel boundaryPanel) { super(boundaryPanel); } @Override public HandlerRegistration addClickHandler(ClickHandler handler) { return addDomHandler(handler, ClickEvent.getType()); } @Override public void fireEvent(GwtEvent<?> event) { } } Here Diagram is a gwt-connector class. Here is the link to the Diagram class and also link to GWT-Connector. Question: Am i doing anything wrong in the code while adding the clickhandler? I am getting error saying that addDomHandler is undefined for the type Diagrams. are there limitations for adding click handlers? Any input will be of great help. Thank you.

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• Google Calendar API: Editing a single occurrence of a recurring event

  - by Fernando

  Using Google Calendar API, how can I edit a single occurrence of a recurring event? (the web interface allows me to do that)

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• Backbone.js not registering Model.hasChanged event

  - by Brian M. Hunt

  Hello, I'm trying to get a View in Backbone.js to save when there's a 'change' event if (and only if) the data has changed. Long story short, I've a 'change' event set on the View that calls this: function changed_event() { log.debug("Before: " + this.model.get('name')) // not 'contrived!' this.model.set({'name': 'contrived!'}); log.debug("After: " + this.model.get('name')) // 'contrived!' if (this.model.hasChanged()) { alert("This is never called."); } } I'd like to know why the model.hasChanged() is false when clearly the model has been changed. I'm not sure what other information is necessary, but if there is more information that may be helpful please comment and I'll elaborate. Thank you for reading.

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• Make a c# / wpf event fire only once?

  - by Donnie

  I have a case where I want a given event to execute once, and only once. I'm trying to do it this way, but I'm having prolems (else I wouldn't be asking). Note that the following code is inside the function that decides that the event needs to be fired. EventHandler h = delegate(Object sender, EventArgs e) { FiringControl.TheEvent -= h; // <-- Error, use of unassigned local variable "h" // Do stuff } FiringControl.TheEvent += h; In general this should work because of the way scope is preserved for delegates until after they're done running, but, since h is in the process of being built when I try to use it it is still considered to be "uninitialized", apparently.

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• Why can event handlers can only be bound to HttpApplication events during IHttpModule initialization

  - by Venemo

  This is just another "working in dev server, why not working in IIS" type question. So, I created a nice DAL using NHibernate as described here. When creating an ISession, I hook up an event handler to the HttpApplication.EndRequest to take care of cleaning it up. However, I deployed my site to IIS and it says: Event handlers can only be bound to HttpApplication events during IHttpModule initialization. Since when? What for? Why? How can I bypass it?

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• Flex: Result event multiple times

  - by Tom

  Hello everybody!! I am trying to learn Flex and now i have the next code: http://pastebin.com/rZwxF7w1 This code is for my login component. I want to get a special string for encrypting my password. This string is given by my authservice. But when i login i get a multiple times a alert with Done(line 69 in the pastebin code or line 4 in the code on the bottom of this question). But i want that it shows one single time. Does someone know what is wrong with this code? Tom protected function tryLogin():void { encryptStringResult.addEventListener('result', function(event:ResultEvent):void { var encryptString:String = event.result.toString(); Alert.show('Done'); }); encryptStringResult.token = auth.getEncryptString(); }

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• Capture Silverlight 4 event when panel clicked

  - by Eric J.

  I have a small Silverlight 4 app that essentially consists of a grid containing a label and a combo box. When I click the label, I replace it with a second text box so that I can edit the label (much the way you can edit the name of a Silverlight control in VS2010). I have a LostFocus event handler on the text box that will end editing when the control loses focus (restoring the updated label). Trouble is, users tend to click on the panel when they are done editing rather than on another control (or hitting Enter, which is also supported). I tried adding a left mouse down event handler to the panel. However, that only fires when the text box does not have the focus (I guess the text box captured the mouse?) Is there an approach to recognize that a non-input control was clicked that would enable me to terminate edit mode?

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