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• SerializationException Occurring Only in Release Mode

  - by Calvin Nguyen

  Hi, I am working on an ASP.NET web app using Visual Studio 2008 and a third-party library. Things are fine in my development environment. Things are also good if the web app is deployed in Debug configuration. However, when it is deployed in Release mode, SerializationExceptions appear intermittently, breaking other functionality. In the Windows event log, the following error can be seen: "An unhandled exception occurred and the process was terminated. Application ID: DefaultDomain Process ID: 3972 Exception: System.Runtime.Serialization.SerializationException Message: Unable to find assembly 'MyThirdPartyLibrary, Version=1.234.5.67, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89'. StackTrace: at System.Runtime.Serialization.Formatters.Binary.BinaryAssemblyInfo.GetAssembly( ) at System.Runtime.Serialization.Formatters.Binary.ObjectReader.GetType(BinaryAsse mblyInfo assemblyInfo, String name) at System.Runtime.Serialization.Formatters.Binary.ObjectMap..ctor(String objectName, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInformationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, BinaryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable) at System.Runtime.Serialization.Formatters.Binary.ObjectMap.Create(String name, String[] memberNames, BinaryTypeEnum[] binaryTypeEnumA, Object[] typeInformationA, Int32[] memberAssemIds, ObjectReader objectReader, Int32 objectId, BinaryAssemblyInfo assemblyInfo, SizedArray assemIdToAssemblyTable) at System.Runtime.Serialization.Formatters.Binary._BinaryParser.ReadObjectWithMa pTyped(BinaryObjectWithMapTyped record) at System.Runtime.Serialization.Formatters.Binary._BinaryParser.ReadObjectWithMa pTyped(BinaryHeaderEnum binaryHeaderEnum) at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run() at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(Header Handler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Str eam serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage) at System.Runtime.Remoting.Channels.CrossAppDomainSerializer.DeserializeObject(Me moryStream stm) at System.AppDomain.Deserialize(Byte[] blob) at System.AppDomain.UnmarshalObject(Byte[] blob) For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp." Using FUSLOGVW.exe (i.e., Assembly Binding Log Viewer), I can see the problem is that IIS attempts to find MyThirdPartyLibrary in directory C:\windows\system32\inetsrv. It refuses to look in the bin folder of the web app, where the DLL is actually located. Does anyone know what the problem is? Thanks, Calvin

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• How Can I Prevent Memory Leaks in IE Mobile?

  - by Jake Howlett

  Hi All, I've written an application for use offline (with Google Gears) on devices using IE Mobile. The devices are experiencing memory leaks at such a rate that the device becomes unusable over time. The problem page fetches entries from the local Gears database and renders a table of each entry with a link in the last column of each row to open the entry ( the link is just onclick="open('myID')" ). When they've done with the entry they return to the table, which is RE-rendered. It's the repeated building of this table that appears to be the problem. Mainly the onclick events. The table is generated in essence like this: var tmp=""; for (var i=0; i<100; i++){ tmp+="<tr><td>row "+i+"</td><td><a href=\"#\" id=\"LINK-"+i+"\""+ " onclick=\"afunction();return false;\">link</a></td></tr>"; } document.getElementById('view').innerHTML = "<table>"+tmp+"</table>"; I've read up on common causes of memory leaks and tried setting the onclick event for each link to "null" before re-rendering the table but it still seems to leak. Anybody got any ideas? In case it matters, the function being called from each link looks like this: function afunction(){ document.getElementById('view').style.display="none"; } Would that constitute a circular reference in any way? Jake

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• WSE 3.0 crashes when ClearHeaders is called

  - by Daniel Enetoft

  Hi! I'm developing a client-server application in c# using WSE web-service. One of the things that the user can do is send jpg images to the server for backup via the web-service. Recently strange errors have occurred. This does not happen for all users, just a few. On the client side the exception is a System.Net.WebException Exception message: The operation has timed out and on the server the following warning is found in the event viewer: Exception information: Exception type: HttpException Exception message: Server cannot clear headers after HTTP headers have been sent. Request information Request URL: MyUrl/Service.asmx Request path: /MyWebService/Service.asmx User host address: ------- User: Is authenticated: False Authentication Type: Thread account name: NT AUTHORITY\NETWORK SERVICE Thread information: Thread ID: 7 Thread account name: NT AUTHORITY\NETWORK SERVICE Is impersonating: False Stack trace: at System.Web.HttpResponse.ClearHeaders() at System.Web.Services.Protocols.SoapServerProtocol.WriteException(Exception e, Stream outputStream) at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing) at System.Web.Services.Protocols.WebServiceHandlerFactory.CoreGetHandler(Type type, HttpContext context, HttpRequest request, HttpResponse response) Does anyone have an idea where this error can come from? I have already tried to raise the "maxRequestLength" in web.config to 16Mb but this doesn't fix it. Regards /Daniel

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• Adding & Removing Dynamic Controls in C# WinForms.

  - by gsvirdi

  I have three Tabs in my WinForm; depending on the selected RaioButton in the TabPages[0] I added few dynamic controls on the relevant TabPage. On Button_Click event the controls are added, but the prob is the I'm not able to remove the Dynamically added controls from the other (irrelevant) TabPage. Here's my code: Label label235 = new Label(); TextBox tbMax = new TextBox(); label235.Name = "label235"; tbMax.Name = "txtBoxNoiseMax"; label235.Text = "Noise"; tbMax.ReadOnly = true; label235.ForeColor = System.Drawing.Color.Blue; tbMax.BackColor = System.Drawing.Color.White; label235.Size = new Size(74, 13); tbMax.Size = new Size(85, 20); if (radioButton1.Checked) { label235.Location = new Point(8, 476); tbMax.Location = new Point(138, 473); tabControl.TabPages[1].Controls.Add(label235); tabControl.TabPages[1].Controls.Add(tbMax); tabControl.TabPages[2].Controls.RemoveByKey("label235"); tabControl.TabPages[2].Controls.RemoveByKey("tbMax"); } else { label235.Location = new Point(8, 538); tbMax.Location = new Point(138, 535); tabControl.TabPages[1].Controls.RemoveByKey("label235"); tabControl.TabPages[1].Controls.RemoveByKey("tbMax"); tabControl.TabPages[2].Controls.Add(label235); tabControl.TabPages[2].Controls.Add(tbMax); } Where am I making that mistake?????

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• How to produce an HTTP 403-equivalent WCF Message from an IErrorHandler?

  - by Andras Zoltan

  I want to write an IErrorHandler implementation that will handle AuthenticationException instances (a proprietary type), and then in the implementation of ProvideFault provide a traditional Http Response with a status code of 403 as the fault message. So far I have my first best guess wired into a service, but WCF appears to be ignoring the output message completely, even though the error handler is being called. At the moment, the code looks like this: public class AuthWeb403ErrorHandler : IErrorHandler { #region IErrorHandler Members public bool HandleError(Exception error) { return error is AuthenticationException; } public void ProvideFault(Exception error, MessageVersion version, ref Message fault) { //first attempt - just a stab in the dark, really HttpResponseMessageProperty property = new HttpResponseMessageProperty(); property.SuppressEntityBody = true; property.StatusCode = System.Net.HttpStatusCode.Forbidden; property.StatusDescription = "Forbidden"; var m = Message.CreateMessage(version, null); m.Properties[HttpResponseMessageProperty.Name] = property; fault = m; } #endregion } With this in place, I just get the standard WCF html 'The server encountered an error processing the request. See server logs for more details.' - which is what would happen if there was no IErrorHandler. Is this a feature of the behaviours added by WebServiceHost? Or is it because the message I'm building is simply wrong!? I can verify that the event log is indeed not receiving anything. My current test environment is a WebGet method (both XML and Json) hosted in a service that is created with the WebServiceHostFactory, and Asp.Net compatibility switched off. The service method simply throws the exception in question.

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• Windows-mobile app won't run after being closed by Task Manager

  - by pithyless

  I've inherited some windows-mobile code that I've been bringing up-to-date. I've come across a weird bug, and I was hoping that even though a bit vague, maybe it will spark someone's memory: Running the app (which is basically a glorified Forms app with P/Invoke gps code), I switch to the task manager, and close the app via End Task. Seems to exit fine (no errors and disappears from Task Manager). Unfortunately, the app refuses to start a second time until I reboot the phone or reinstall the CAB. What's worse: this bug is reproducible on a HTC Diamond, but works fine (ie. can run again after EndTask) on an HTC HD2. The only thing I can think of is some kind of timing race between a Dispose() and the Task Manager. Any ideas? I'm also thinking of a workaround - I do have a working "Exit Application" routine that correctly cleans up the app; can I catch the EndTask event in the c# code in order to complete a proper cleanup? Maybe I'm just missing the pain point... all ideas welcome :)

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• POSIX AIO Library and Callback Handlers

  - by Charles Salvia

  According to the documentation on aio_read/write, there are basically 2 ways that the AIO library can inform your application that an async file I/O operation has completed. Either 1) you can use a signal, 2) you can use a callback function I think that callback functions are vastly preferable to signals, and would probably be much easier to integrate into higher-level multi-threaded libraries. Unfortunately, the documentation for this functionality is a mess to say the least. Some sources, such as the man page for the sigevent struct, indicate that you need to set the sigev_notify data member in the sigevent struct to SIGEV_CALLBACK and then provide a function handler. Presumably, the handler is invoked in the same thread. Other documentation indicates you need to set sigev_notify to SIGEV_THREAD, which will invoke the callback handler in a newly created thread. In any case, on my Linux system (Ubuntu with a 2.6.28 kernel) SIGEV_CALLBACK doesn't seem to be defined anywhere, but SIGEV_THREAD works as advertised. Unfortunately, creating a new thread to invoke the callback handler seems really inefficient, especially if you need to invoke many handlers. It would be better to use an existing pool of threads, similar to the way most network I/O event demultiplexers work. Some versions of UNIX, such as QNX, include a SIGEV_SIGNAL_THREAD flag, which allows you to invoke handlers using a specified existing thread, but this doesn't seem to be available on Linux, nor does it seem to even be a part of the POSIX standard. So, is it possible to use the POSIX AIO library in a way that invokes user handlers in a pre-allocated background thread/threadpool, rather than creating/destroying a new thread everytime a handler is invoked?

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• C# Communication between threads.

  - by GT

  Hi, I am using .NET 3.5 and am trying to wrap my head around a problem (not being a supreme threading expert bear with me). I have a windows service which has a very intensive process that is always running, I have put this process onto a separate thread so that the main thread of my service can handle operational tasks - i.e., service audit cycles, handling configuration changes, etc, etc. I'm starting the thread via the typical ThreadStart to a method which kicks the process off - call it workerthread. On this workerthread I am sending data to another server, as is expected the server reboots every now and again and connection is lost and I need to re-establish the connection (I am notified by the lost of connection via an event). From here I do my reconnect logic and I am back in and running, however what I easily started to notice to happen was that I was creating this worker thread over and over again each time (not what I want). Now I could kill the workerthread when I lose the connection and start a new one but this seems like a waste of resources. What I really want to do, is marshal the call (i.e., my thread start method) back to the thread that is still in memory although not doing anything. Please post any examples or docs you have that would be of use. Thanks.

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• Post Loading ads - using appendChild to move an IFRAME with text link ads

  - by Prem

  I have changed code around to basically load an add the bottom of the page in a hidden div and attached an onload event handler that called document.getElementById(xxx).appendChild() to take the hidden ad and move it into the right spot in my page. This works GREAT.. however when the ad is a text ad it AFTER i move the ad there is nothing in the rendered Iframe. I did tests to see what it looks like before i move it and sure enough the text links load in the IFRAME but the second i do the appendChild call to move the div that contains the ad i seem to loose the contents of the Iframe. Any ideas whats going on <div id="myad" style="display: none;"> GA_googleFillSlot("MyADSlotName"); </div> <script> window.onload = function() { // leader board document.getElementById('adplaceholder').appendChild(document.getElementById('myAd')); document.getElementById('myAd').style.display = ''; </script> UPDATE: I think what the problem here is that on text ads google writes to the iframe directly inserting the relevant text links where are on other ads it uses the iframe to just point to some src. seems like when i do the appendchild, if there is no "src" set for the iframe after the copy is done the iframe in the new location contains nothing... guess it does a reload on the src? Any way around this??

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• How to open a help webpage after installation is complete

  - by Kapil

  I have built an installer for my windows app using the VisualStudio 2008 IDE. I also use some custom-actions to do a few extra stuff at the time of installation/uninstallation. What I also want to do is that when the installation is completed, the installer should launch a help webpage or a getting-started page for the users to know how to go ahead with the app. I am doing the following for this: private void CustomInstaller_Committed(object sender, InstallEventArgs e) { System.Windows.Forms.LinkLabel lbl = new System.Windows.Forms.LinkLabel(); lbl.Links.Remove(lbl.Links[0]); lbl.Links.Add(0, lbl.Text.Length, "http://www.mywebsite.com/help.aspx"); ProcessStartInfo pInfo = new ProcessStartInfo(lbl.Links[0].LinkData.ToString()); Process.Start(pInfo); } Also, I set the event handler as such: this.Committed += new InstallEventHandler(CustomInstaller_Committed); This is launching the webpage, but not at the right point in the flow where I would have wanted it. It launches the IE browser even before the user dismisses the installation window (i.e clicks 'Close' in the Installation Completed dialog box). I want the webpage to open only when the user finally dismisses the installation. Any ideas how can I achieve this? Thanks, Kapil

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• C# File IO with Streams - Best Memory Buffer Size

  - by AJ

  Hi, I am writing a small IO library to assist with a larger (hobby) project. A part of this library performs various functions on a file, which is read / written via the FileStream object. On each StreamReader.Read(...) pass, I fire off an event which will be used in the main app to display progress information. The processing that goes on in the loop is vaired, but is not too time consuming (it could just be a simple file copy, for example, or may involve encryption...). My main question is: What is the best memory buffer size to use? Thinking about physical disk layouts, I could pick 2k, which would cover a CD sector size and is a nice multiple of a 512 byte hard disk sector. Higher up the abstraction tree, you could go for a larger buffer which could read an entire FAT cluster at a time. I realise with today's PC's, I could go for a more memory hungry option (a couple of MiB, for example), but then I increase the time between UI updates and the user perceives a less responsive app. As an aside, I'm eventually hoping to provide a similar interface to files hosted on FTP / HTTP servers (over a local network / fastish DSL). What would be the best memory buffer size for those (again, a "best-case" tradeoff between perceived responsiveness vs. performance). Thanks in advance for any ideas, Adam

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• Calling AddEventListener in a loop with a variable element name

  - by user302209

  Hi, I'm trying to do the following: I have a set of images and select (dropdown) HTML elements, 30 of each one. I'm trying to use AddEventListener on a loop from 1 to 30 so that when I change the value of the select, the image src is updated (and the image changes). The AddEventListener function is this one: function AddEventListener(element, eventType, handler, capture) { if (element.addEventListener) element.addEventListener(eventType, handler, capture); else if (element.attachEvent) element.attachEvent("on" + eventType, handler); } I tried this and it worked: var urlfolderanimalimages = "http://localhost/animalimages/"; var testselect = "sel15"; var testimg = "i15"; AddEventListener(document.getElementById(testselect), "change", function(e) { document.getElementById(testimg).src = urlfolderanimalimages + document.getElementById(testselect).value; document.getElementById(testimg).style.display = 'inline'; if (e.preventDefault) e.preventDefault(); else e.returnResult = false; if (e.stopPropagation) e.stopPropagation(); else e.cancelBubble = true; }, false); But then I tried to call it in a loop and it doesn't work. The event is added, but when I change any select, it will update the last one (the image with id i30). var urlfolderanimalimages = "http://localhost/animalimages/"; for (k=1;k<=30;k++) { var idselect = "sel" + k; var idimage = "i" + k; AddEventListener(document.getElementById(idselect), "change", function(e) { document.getElementById(idimage).src = urlfolderanimalimages + document.getElementById(idselect).value; document.getElementById(idimage).style.display = 'inline'; if (e.preventDefault) e.preventDefault(); else e.returnResult = false; if (e.stopPropagation) e.stopPropagation(); else e.cancelBubble = true; }, false); } What am I doing wrong? I'm new to JavaScript (and programming in general), so sorry for the vomit-inducing code :(

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• Idiomatic default sort using WCF RIA, EF4, Silverlight?

  - by Duncan Bayne

  I've got two Silverlight 4.0 ComboBoxes; the second displays the children of the entity selected in the first: <ComboBox Name="cmbThings" ItemsSource="{Binding Path=Things,Mode=TwoWay}" DisplayMemberPath="Name" SelectionChanged="CmbThingsSelectionChanged" /> <ComboBox Name="cmbChildThings" ItemsSource="{Binding Path=SelectedThing.ChildThings,Mode=TwoWay}" DisplayMemberPath="Name" /> The code behind the view provides a (simple, hacky) way to databind those ComboBoxes, by loading Entity Framework 4.0 entities through a WCF RIA service: public EntitySet<Thing> Things { get; private set; } public Thing SelectedThing { get; private set; } protected override void OnNavigatedTo(NavigationEventArgs e) { var context = new SortingDomainContext(); context.Load(context.GetThingsQuery()); context.Load(context.GetChildThingsQuery()); Things = context.Things; DataContext = this; } private void CmbThingsSelectionChanged(object sender, SelectionChangedEventArgs e) { SelectedThing = (Thing) cmbThings.SelectedItem; if (PropertyChanged != null) { PropertyChanged.Invoke(this, new PropertyChangedEventArgs("SelectedThing")); } } public event PropertyChangedEventHandler PropertyChanged; What I'd like to do is have both combo boxes sort their contents alphabetically, and I'd like to specify that behaviour in the XAML if at all possible. Could someone please tell me what is the idiomatic way of doing this with the SL4 / EF4 / WCF RIA technology stack?

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• Using Javascript to detect when a user has selected an item in an ASP.NET listbox

  - by Amr Bekhit

  Hello all, I am developing an ASP.NET web application that incorporates google maps. I have an ASP.NET listbox on my page which contains a list of items. When the user selects one of the items, I'd like to show this item on the map. The main complication lies in the fact that google maps uses javascript to control it and the listbox is a server control. I can think of two ways to do this. The first would involve the listbox calling a javascript function when the user selects a new item. I can then write this function to perform the necessary map operations. Unfortunately, the OnSelectedIndexChanged property of the listbox doesn't seem to support javascript functions. The second involves wrapping an UpdatePanel around the listbox and getting the listbox to perform a postback. In the SelectedIndexChanged event in VB/C#, I would the need to somehow make a call to a javascript function which would then update the map. Which solution can I use? Thanks --Amr

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• Lambdas within Extension methods: Possible memory leak?

  - by Oliver

  I just gave an answer to a quite simple question by using an extension method. But after writing it down i remembered that you can't unsubscribe a lambda from an event handler. So far no big problem. But how does all this behave within an extension method?? Below is my code snipped again. So can anyone enlighten me, if this will lead to myriads of timers hanging around in memory if you call this extension method multiple times? I would say no, cause the scope of the timer is limited within this function. So after leaving it no one else has a reference to this object. I'm just a little unsure, cause we're here within a static function in a static class. public static class LabelExtensions { public static Label BlinkText(this Label label, int duration) { Timer timer = new Timer(); timer.Interval = duration; timer.Tick += (sender, e) => { timer.Stop(); label.Font = new Font(label.Font, label.Font.Style ^ FontStyle.Bold); }; label.Font = new Font(label.Font, label.Font.Style | FontStyle.Bold); timer.Start(); return label; } }

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• Visibility of Class field-data of Mouse Clicked ImageButton located within WrapPanel

  - by Bill

  I am attempting to obtain the class-data behind an ImageButton that is mouse-clicked; which ImageButton is located within a WrapPanel filled with ImageButtons. The problem I am having is obtaining the visibility of the field data within the class behind the image-button. Although I can see the class, I can neither see nor access the field data. Can anyone please point me in the right direction? // Handles the ImageButton mouseClick event within the WrapPanel. private void SolarSystem_Click(Object sender, RoutedEventArgs e) { FrameworkElement fe = e.OriginalSource as FrameworkElement; SelectedPlanet PlanetSelected = new SelectedPlanet(fe); PlanetSelected.Owner = this; MessageBox.Show(PlanetSelected.PlanetName); } // Used to initiate instance of Class and some field data. public SelectedPlanet(FrameworkElement fe) { InitializeComponent(); string sPlanetName = ((PlanetClass)(fe)).PlanetName; return sPlanetName } // Class Data public class PlanetClass { string planetName; public PlanetClass(string planetName) { PlanetName = planetName; } public string PlanetName { set { planetName = value; } get { return planetName; } } }

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• can't get jquery livequery to with an update panel

  - by Jeremy

  I have some basic html inside an asp.net update panel. Using livequery, I set up autocomplete, blur and keydown events so that they all continue to be wired up after the update panel does a partial page load. When the page initially loads, all the events work fine but after the update panel does a partial page reload, none of the events wired up with livequery continue to work. Are there known issues with livequery and update panels? Html: <asp:UpdatePanel ID="upData" runat="server" UpdateMode="Conditional"> <ContentTemplate> <asp:DataList ID="dlData" runat="server" DataSource='<%# this.Data %>' DataKeyField="ID"> <ItemTemplate> <table> <tr> <th class="required">Location</th> <td><asp:TextBox ID="txtFromLocation" MaxLength="10" CssClass="searchlocation fromlocation required" runat="server" Text='<%# Eval("FromLocation")%>'/><asp:RequiredFieldValidator ID="rvalFromLocation" runat="server" ControlToValidate="txtFromLocation" ValidationGroup="leg">*</asp:RequiredFieldValidator></td> </tr> </table> </ItemTemplate> </asp:DataList> </ContentTemplate> </asp:UpdatePanel> And then I have my javascript. Normally it has a bunch of other code, but I can reduce it down to this and still have the problem: $(document).ready(function() { $(".searchlocation").livequery(function() { $(this).keydown(function(event) {alert('test');}); }); });

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• Disable Return key outside textareas on a Asp.Net web page (containing ajax code)

  - by Achim

  Hi, I have an Asp.Net web page, having the common Asp.Net form. The outer "border" of the page (i.e. main menu, header, ...) is build using normal Asp.Net code using a master page. The content of that page uses jQuery to display dynamic forms and to send data to the server. If I push the return key on that page, I jump to a (more or less) random page - which is not what the user expects. ;-) There are some text areas and the user must be able to enter line breaks. Otherwise it would be fine to disable the return key completely. Any bullet proof way to do that? I found some solutions on the web, which capture the keypress event and ignore \x13, but that does not really work. It works as long as the page has just loaded, but as soon as I have clicked on some elements, the return key behaves as usuall. Any hint would be really appreciated! Achim

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• Javascript add a PHP file.

  - by Jordan Pagaduan

  var editing = false; if (document.getElementById && document.createElement) { var butt = document.createElement('BUTTON'); var buttext = document.createTextNode('Ready!'); butt.appendChild(buttext); butt.onclick = saveEdit; } function catchIt(e) { if (editing) return; if (!document.getElementById || !document.createElement) return; if (!e) var obj = window.event.srcElement; else var obj = e.target; while (obj.nodeType != 1) { obj = obj.parentNode; } if (obj.tagName == 'TEXTAREA' || obj.tagName == 'A') return; while (obj.nodeName != 'P' && obj.nodeName != 'HTML') { obj = obj.parentNode; } if (obj.nodeName == 'HTML') return; var x = obj.innerHTML; var y = document.createElement('TEXTAREA'); var z = obj.parentNode; z.insertBefore(y,obj); z.insertBefore(butt,obj); z.removeChild(obj); y.value = x; y.focus(); editing = true; } function saveEdit() { var area = document.getElementsByTagName('TEXTAREA')[0]; var y = document.createElement('P'); var z = area.parentNode; y.innerHTML = area.value; z.insertBefore(y,area); z.removeChild(area); z.removeChild(document.getElementsByTagName('button')[0]); editing = false; } document.onclick = catchIt; This code is a quick edit and I want to add a PHP script that will UPDATE my database base on the changes on the text.

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• InvalidAuthenticityToken for JQuery despite setting authenticity token

  - by user117046

  I'm getting an InvalidAuthenticityToken despite adding in corresponding authenticity tokens in the jquery response. Is there an error in the code, or is there another, root problem? I appreciate any comments. Thanks! Using: Rails 2.3.3, Ruby 1.8.6, Webrick, JQuery 1.3.2 layout/networks.html.haml = token_tag = javascript_tag "window.AUTH_TOKEN = '#{form_authenticity_token}';" javascripts/application.js $(document).ready(function() { // All non-GET requests will add the authenticity token // if not already present in the data packet $(document).ajaxSend(function(event, request, settings) { if (typeof(window.AUTH_TOKEN) == "undefined") return; // <acronym title="Internet Explorer 6">IE6</acronym> fix for http://dev.jquery.com/ticket/3155 if (settings.type == 'GET' || settings.type == 'get') return; settings.data = settings.data || ""; settings.data += (settings.data ? "&" : "") + "authenticity_token=" + encodeURIComponent(window.AUTH_TOKEN); }); ajaxLinks(); }); The rendered html has: <input name="authenticity_token" type="hidden" value="ZaXj3ACQl+8JKtaDAUoxtSsqzEagSPyHbS25ai9qWCw=" /> <script type="text/javascript"> //<![CDATA[ window.AUTH_TOKEN = 'ZaXj3ACQl+8JKtaDAUoxtSsqzEagSPyHbS25ai9qWCw='; //]]> </script> and breakpointing through, shows that window.AUTH_TOKEN has been set. Any help to resolve this would be great.

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• MD5 wrong number of arguments (1 for 0) Error

  - by Salil

  Hi All, I have following error on my Server which is working properly on my local on following line . event_id = MD5.new("event-init-flash-#{Asteroid::now}").to_s #line 232 ERROR: wrong number of arguments (1 for 0) /ruby/gems/gems/shooting_star-3.2.7/bin/../lib/shooting_star/server.rb:232:in initialize' /ruby/gems/gems/shooting_star-3.2.7/bin/../lib/shooting_star/server.rb:232:in new' /ruby/gems/gems/shooting_star-3.2.7/bin/../lib/shooting_star/server.rb:232:in make_flash_connection' /ruby/gems/gems/shooting_star-3.2.7/bin/../lib/shooting_star/server.rb:70:in receive_data' /ruby/gems/gems/shooting_star-3.2.7/bin/../lib/shooting_star.rb:87:in run' /ruby/gems/gems/shooting_star-3.2.7/bin/../lib/shooting_star.rb:87:in start' /ruby/gems/gems/shooting_star-3.2.7/bin/shooting_star:61 /ruby/gems/bin/shooting_star:19:in `load' /ruby/gems/bin/shooting_star:19 POST /10 HTTP/1.1 Host: 67.222.55.30:8080 Content-length: 103 I used shooting_star to create an Chat Application. Ref:- http://github.com/genki/shooting-star Following are the REQUIREMENTS of the shooting_star Linux or xBSD OS having epoll or kqueue. Increase ulimit of nofile up to over 100,000. (edit /etc/security/limits.conf file.) prototype.js 1.5.0+ Ruby 1.8.5+ Ruby on Rails 1.2.0+ My Local Configuration are O.S Linux Ruby ruby 1.8.6 (2009-08-04 patchlevel 383) [i386-linux] Rails 2.3.4 shooting_star 3.2.7 prototype.js 1.6.0.3 My Server Configuration are O.S Linux Ruby ruby 1.8.6 (2009-08-04 patchlevel 383) [x86_64-linux] Rails 2.3.4 shooting_star 3.2.7 prototype.js 1.6.0.3 I just want to know what is the problem why it's not working on server if everything is fine in local. Regards, Salil Gaikwad

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• How to check absolute control visibility and how to be notified for changes of absolute visibility

  - by portakalla

  I have several controls inside my form and I perform several changes (Text, Font, BackColor etc.) on these controls. My changes are necessary only if the controls are visible. So, I want to stop performing my changes on controls that are not visible. I want to keep changing my controls when they become visible again. I can use Control.Visible and Control.VisibleChanged, however they are not satisfactory for my purpose. The problem is, VisibleChanged is not fired when control becomes invisible due to its parent (i.e. because its parent became invisible). Interestingly, it is fired when control becomes visible again. Is there a way to be notified for visibility changes without recursively listening parent visibility changes? I also want to be notified when another form is placed over my form and some of my controls become non-visible. I call this absolute visibility. (Is there another term for it?) Is there an event that I can use for this purpose? Thanks.

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• Databinding in WinForms performing async data import

  - by burnside

  I have a scenario where I have a collection of objects bound to a datagrid in winforms. If a user drags and drops an item on to the grid, I need to add a placeholder row into the grid and kick off a lengthy async import process. I need to communicate the status of the async import process back to the UI, updating the row in the grid and have the UI remain responsive to allow the user to edit the other rows. What's the best practice for doing this? My current solution is: binding a thread safe implementation of BindingList to the grid, filled with the objects that are displayed as rows in the grid. When a user drags and drops an item on to the grid, I create a new object containing the sparse info obtained from the dropped item and add that to the BindingList, disabling the editing of that row. I then fire off a separate thread to do the import, passing it the newly bound object I have just created to fill with data. The import process, periodically sets the status of the object and fires an event which is subscribed to by the UI telling it to refresh the grid to see the new properties on the object. Should I be passing the same object that is bound to the grid to the import process thread to operate on, or should I be creating a copy and merging back the changes to the object on the UI thread using BeginInvoke? Any problems or advice with this implementation? Thanks

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• C++ errors not shown in Visual Studio C# project

  - by Diana

  I have in Visual Studio 2008 a .NET 3.5 C# project that uses a dll compiled from a C# project (let's call it dll A). Dll A is using on his turn some C++ libraries. The problem is that when I encounter an error while calling objects from dll A, the application just closes, without showing any error. But I need to know what's the problem, I cannot just guess and go blind all along the project with this... I checked Window's event log, could not find anything. I checked the settings of throwing errors in Visual Studio, in menu Debug - Exceptions, all of them are checked (including C++ exceptions), so, any errors should be thrown. My code looks something like this: tessnet2.Tesseract tessocr = new tessnet2.Tesseract(); tessocr.Init(@"s:\temp\tessdata", "eng", false); tessocr.GetThresholdedImage(bmp, Rectangle.Empty).Save("s:\\temp\\" + Guid.NewGuid().ToString() + ".bmp"); List<tessnet2.Word> words = ocr.DoOCR(bmp, "eng"); //App exits at this line If I put in my code something like int x = Convert.ToInt32("test"); this should throw an error. And it throws, and Visual Studio shows it. Does anyone having any idea why the errors are not being shown? Or where else could be registered? Any help is very appreciated! Thanks!

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• AS3 Working With Arbitrarily Large Files

  - by Kekoa

  I am trying to read a very large file in AS3 and am having problems with the runtime just crashing on me. I'm currently using a FileStream to open the file asynchronously. This does not work(crashes without an Exception) for files bigger than about 300MB. _fileStream = new FileStream(); _fileStream.addEventListener(IOErrorEvent.IO_ERROR, loadError); _fileStream.addEventListener(Event.COMPLETE, loadComplete); _fileStream.openAsync(myFile, FileMode.READ); In looking at the documentation, it sounds like the FileStream class still tries to read in the entire file to memory(which is bad for large files). Is there a more suitable class to use for reading large files? I really would like something like a buffered FileStream class that only loads the bytes from the files that are going to be read next. I'm expecting that I may need to write a class that does this for me, but then I would need to read only a piece of a file at a time. I'm assuming that I can do this by setting the position and readAhead properties of the FileStream to read a chunk out of a file at a time. I would love to save some time if there is a class like this that already exists. Is there a good way to process large files in AS3, without loading entire contents into memory?

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