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  • Web Animations - the next generation

    Web Animations - the next generation The GDL event page for this event: developers.google.com Ask and vote for questions at www.google.com Browser developers are designing the next generation of animation features that will enhance HTML5 with rich, powerful new animation primitives. Designers and web app developers will all benefit from improved methods of animating content. Hear from developers of Google Chrome and Mozilla Firefox how this works, and learn how to try out the new animation features now in your favorite browser. From: GoogleDevelopers Views: 0 3 ratings Time: 30:00 More in Science & Technology

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  • Printing Tip Handling User Initiated Dialogs Exceptions

    I see this question every so often so it makes sense to share it through a quick post. When using the print API in Silverlight 4 you can run into the dreaded exception: System.Security.SecurityException: Dialogs must be user-initiated Then you examine your code and confirm that your code where you invoke the PrintDocuments Print method are indeed being handled by a user-initiated event. If you are not invoking Print in a user-initiated event then your know your solution :) Here is some sample...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Webcast: Extreme Analytics Without Limits

    - by Rob Reynolds
    Event Date: November 8, 2012 Event Time: 1 p.m. PT / 4 p.m. ET If you are a current Oracle Business Intelligence Applications customer, or thinking about implementing the BI Apps, please join us for this Webcast to learn how the combination of Oracle Exalytics In- Memory Machine and Oracle’s market leading analytic applications enables you to go beyond the traditional boundaries of data analysis and get the insight you need from massive volumes of data – all at the speed of thought. See how you can benefit from running your analytic applications on Oracle Exalytics to: Lower TCO Improve Operational Decision Making and Enhance Competitive Advantage Deliver Speed-of-thought Analysis – Anytime, Anywhere Click here to register.

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  • Analytics - Total events divided by number of unique pages?

    - by GeekyAndUnique
    I am using Google Analytics events to track keywords on my articles - not necessarily the best system I know but there are too many for variables I can't easily change it right now - and I would like to be able to see how popular each keyword is by dividing the number of page views with a keyword by the number of unique pages. Is there a/what is the best way of doing this? EDIT FOR CLARITY I currently have a system set up where every time somebody loads an article an event is fired for each of the tags/keywords used, with the keyword being the label. I can currently view my view count for each of the keywords by looking at the total events for each label, however I would like to be able to see which keywords are the most popular by dividing the number of times the event has been fired by the the number of different pages it has been fired from.

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  • SQL Saturday #303 - Rochester, NY

    Don’t miss your opportunity to attend SQL Saturday #303, the largest FREE training event dedicated exclusively to SQL Server Administration, Development and Business Intelligence to hit Rochester, NY. This event also features 2 paid-for preconferences, run by Bill Pearson and David Klee. Register while space if available. 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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  • SQL Saturday #320 - Raleigh, NC

    SQL Saturday is a training event for SQL Server professionals and those wanting to learn about SQL Server. The Triangle SQL Server user group (http://www.tripass.org) of Raleigh, NC is hosting this event on September 6, 2014. Register while space is available. Can 41,000 DBAs really be wrong? Join 41,000 other DBAs who are following the new series from the DBA Team: the 5 Worst Days in a DBA’s Life. Part 3, As Corrupt As It Gets, is out now – read it here.

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  • Host-only network ?VM??????????

    - by katsumii
    VirtualBox ?????·?????????·???? (Oracle VM VirtualBox??)????VM?????????9??????????????????????????????????????????????????????????????????Oracle Data Guard Basic Hands On Training???????!Oracle Data Guard ??????????????Oracle Enterprise Manager ??? Oracle Database???????????????JRockit Flight Recorder?????RAC ??????????????! Oracle RAC 11g R2 ?????????Oracle Database 11g Release 2??????????????????Oracle GoldenGate???????Oracle Complex Event Processing11g SmartGrid???????? ?????Oracle Complex Event Processing11g CEP?BAM??? EDA????????? ????? ?????VM??????Host-only network?????????????????????????????????????????????????????Bridged???????????IP?????????????????????????????Linux??sshd??????????????????????????????????Windows??????????????????????????????? port forwarding ???????Poderosa ?????????? portforwading ????????????????????? ??????PC?? ssh -p 23 oracle@(VBox???) ??????????   

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  • Using WPF and SlimDx (DirectX 10/11)

    - by slurmomatic
    I am using SlimDX with WinForms for a while now, but want to make the switch to WPF now. However, I can't figure out how to get DX10/11 working with WPF. The February release of SlimDX provides a WPF example, which only works with DX 9 though. I found the following solution: http://jmorrill.hjtcentral.com/Home/tabid/428/EntryId/437/Direct3D-10-11-Direct2D-in-WPF.aspx but can't get it to work with SlimDX. My main problem is the shared resource handle as I don't know how to retrieve the shared handle from a SlimDX texture. I can't find any information to this topic. In C++ the code looks like this: HRESULT D3DImageEx::GetSharedHandle(IUnknown *pUnknown, HANDLE * pHandle) { HRESULT hr = S_OK; *pHandle = NULL; IDXGIResource* pSurface; if (FAILED(hr = pUnknown->QueryInterface(__uuidof(IDXGIResource), (void**)&pSurface))) return hr; hr = pSurface->GetSharedHandle(pHandle); pSurface->Release(); return hr; } Basically, what I want to do (because I think that this is the solution), is to share a texture between a Direct3d9DeviceEx (for rendering the WPF D3DImage) and a Direct3d10Device (a texture render target for my scene). Any pointers in the right direction are greatly appreciated.

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  • Implementing a listview inside a sliding drawer with a listview already present

    - by Parker
    I have an app whose main class extends ListActivity: public class GUIPrototype extends ListActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final Cursor c = managedQuery(People.CONTENT_URI, null, null, null, null); String[] from = new String[] {People.NAME}; int[] to = new int[] { R.id.row_entry }; SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,R.layout.drawer,c,from,to); setListAdapter(adapter); getListView().setTextFilterEnabled(true); } } I have a sliding drawer included in my XML, and I'm trying to get a separate listview to appear in the sliding drawer. I'm trying to populate the second listview using an inflater: View inflatedView = View.inflate(this, R.layout.main, null); ListView namesLV = (ListView) inflatedView.findViewById(R.id.content); String[] names2 = new String[] { "CS 345", "New Tag", "Untagged" }; ArrayAdapter<String> bb = new ArrayAdapter<String>(this, R.layout.main, R.id.row_entry, names2); namesLV.setAdapter(bb); This compiles, and runs, but the slidingdrawer is completely blank. My XML follows: <SlidingDrawer android:id="@+id/drawer" android:handle="@+id/handle" android:content="@+id/content" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical" android:layout_gravity="bottom"> <ImageView android:id="@id/handle" android:layout_width="48px" android:layout_height="48px" android:background="@drawable/icon"/> <ListView android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@id/content"/> </SlidingDrawer> I feel like I'm missing a vital step. I haven't found any resources on my problem by Googling, so any help would be greatly appreciated.

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  • Web Service Exception Handling

    - by SchlaWiener
    I have a Winforms app that consumes a C# Webservice. If the WebService throws an Exception my Client app always get's a SoapException instead of the "real" Exception. Here's a demo: [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] public class Service1 : System.Web.Services.WebService { [WebMethod] public string HelloWorld() { throw new IndexOutOfRangeException("just a demo exception"); } } Now, on the client side, I want to be able to handle different exceptions in a different way. try { ServiceReference1.Service1SoapClient client = new ServiceReference1.Service1SoapClient(); Button1.Text = client.HelloWorld(); } catch (IndexOutOfRangeException ex) { // I know how to handle IndexOutOfRangeException // but this block is never reached } catch (MyOwnException ex) { // I know how to handle MyOwnException // but this block is never reached } catch (System.ServiceModel.FaultException ex) { // I always end in this block } But that does not work because I always get a "System.ServiceModel.FaultException" and I can only figure out the "real" exception by parsing the Exception's message property: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.IndexOutOfRangeException: just a demo\n at SoapExceptionTest.Service1.Service1.HelloWorld() in ... --- End of inner exception stack trace --- Is there a way to make this work somehow?

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  • Translating EventAggregators usage of SynchronizationContext to VB.Net

    - by Phil Sayers
    Working with a fairly large VB.Net back office winforms application. 1 million+ LOC. Big ball of mud, 90% of all code is in Forms & other UI controls. Slowly introducing better architecture as time & recources allows, We've been using ideas from the EventAggrgator by Jeremy Miller. http://codebetter.com/blogs/jeremy.miller/archive/2008/01/11/build-your-own-cab-extensible-pub-sub-event-aggregator-with-generics.aspx Initially I stripped out the usage of SynchronizationContext. Now I'm trying to introduce it back, and I'm struggling with the translation of the lamda stuff from c# to vb.net. Specifically this line of c# _context.Send(delegate { receiver.Handle(subject); }, null); This is the vb.net I have so far: _context.Send(New SendOrPostCallback(AddressOf listener.Handle(message)), Nothing) The error I'm getting is listener.Handle(message) <-- AddressOf operand must be the name of a method. I'm sure I'm missing something simple, but after staring at this for 2 days, I'm lost.

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  • Get close window message in Hidden C# Console Application

    - by LexRema
    Hello everyone. I have a Windows Form that starts some console application in background(CreateNoWindow = rue,WindowStyle = ProcessWindowStyle.Hidden). Windows form gives me opportunity to stop the console application at any time. But I'd like to handle somehow the close message inside the console application. I tried to use hooking like: [DllImport("Kernel32")] public static extern bool SetConsoleCtrlHandler(HandlerRoutine handler, bool add); // A delegate type to be used as the handler routine // for SetConsoleCtrlHandler. public delegate bool HandlerRoutine(CtrlTypes ctrlType); // An enumerated type for the control messages // sent to the handler routine. public enum CtrlTypes { CTRL_C_EVENT = 0, CTRL_BREAK_EVENT, CTRL_CLOSE_EVENT, CTRL_LOGOFF_EVENT = 5, CTRL_SHUTDOWN_EVENT } private static bool ConsoleCtrlCheck(CtrlTypes ctrlType) { StaticLogger.Instance.DebugFormat("Main: ConsoleCtrlCheck: Got event {0}.", ctrlType); if (ctrlType == CtrlTypes.CTRL_CLOSE_EVENT) { // Handle close stuff } return true; } static int Main(string[] args) { // Subscribing HandlerRoutine hr = new HandlerRoutine(ConsoleCtrlCheck); SetConsoleCtrlHandler(hr, true); // Doing stuff } but I get the message inside ConsoleCtrlCheck only if the console window is created. But if window is hidden - I don't get any message. In my windows Form to close console application process I use proc.CloseMainWindow(); to send message to the console window. P.S. AppDomain.CurrentDomain.ProcessExit += CurrentDomain_ProcessExit; - also does not help Do you now other way to handle this situation? Thanks.

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  • JSF: Cannot catch ViewExpiredException

    - by ifischer
    I'm developing a JSF 2.0 application on Glassfish v3 and i'm trying to handle the ViewExpiredException. But whatever i do, i always get a Glassfish error report instead of my own error page. To simulate the occurrence of the VEE, i inserted the following function into my backing bean, which fires the VEE. I'm triggering this function from my JSF page through a commandLink. The Code: @Named public class PersonHome { (...) public void throwVEE() { throw new ViewExpiredException(); } } At first i tried it by simply adding an error-page to my web.xml: <error-page> <exception-type>javax.faces.application.ViewExpiredException</exception-type> <location>/error.xhtml</location> </error-page> But this doesn't work, i'm not redirected to error but i'm shown the Glassfish errorpage, which shows a HTTP Status 500 page with the following content: description:The server encountered an internal error () that prevented it from fulfilling this request. exception: javax.servlet.ServletException: javax.faces.application.ViewExpiredException root cause: javax.faces.el.EvaluationException:javax.faces.application.ViewExpiredException root cause:javax.faces.application.ViewExpiredException Next thing i tried was to write ExceptionHandlerFactory and a CustomExceptionHandler, as described in JavaServerFaces 2.0 - The Complete Reference. So i inserted the following tag into faces-config.xml: <factory> <exception-handler-factory> exceptions.ExceptionHandlerFactory </exception-handler-factory> </factory> And added these classes: The factory: package exceptions; import javax.faces.context.ExceptionHandler; public class ExceptionHandlerFactory extends javax.faces.context.ExceptionHandlerFactory { private javax.faces.context.ExceptionHandlerFactory parent; public ExceptionHandlerFactory(javax.faces.context.ExceptionHandlerFactory parent) { this.parent = parent; } @Override public ExceptionHandler getExceptionHandler() { ExceptionHandler result = parent.getExceptionHandler(); result = new CustomExceptionHandler(result); return result; } } The custom exception handler: package exceptions; import java.util.Iterator; import javax.faces.FacesException; import javax.faces.application.NavigationHandler; import javax.faces.application.ViewExpiredException; import javax.faces.context.ExceptionHandler; import javax.faces.context.ExceptionHandlerWrapper; import javax.faces.context.FacesContext; import javax.faces.event.ExceptionQueuedEvent; import javax.faces.event.ExceptionQueuedEventContext; class CustomExceptionHandler extends ExceptionHandlerWrapper { private ExceptionHandler parent; public CustomExceptionHandler(ExceptionHandler parent) { this.parent = parent; } @Override public ExceptionHandler getWrapped() { return this.parent; } @Override public void handle() throws FacesException { for (Iterator<ExceptionQueuedEvent> i = getUnhandledExceptionQueuedEvents().iterator(); i.hasNext();) { ExceptionQueuedEvent event = i.next(); System.out.println("Iterating over ExceptionQueuedEvents. Current:" + event.toString()); ExceptionQueuedEventContext context = (ExceptionQueuedEventContext) event.getSource(); Throwable t = context.getException(); if (t instanceof ViewExpiredException) { ViewExpiredException vee = (ViewExpiredException) t; FacesContext fc = FacesContext.getCurrentInstance(); NavigationHandler nav = fc.getApplication().getNavigationHandler(); try { // Push some useful stuff to the flash scope for // use in the page fc.getExternalContext().getFlash().put("expiredViewId", vee.getViewId()); nav.handleNavigation(fc, null, "/login?faces-redirect=true"); fc.renderResponse(); } finally { i.remove(); } } } // At this point, the queue will not contain any ViewExpiredEvents. // Therefore, let the parent handle them. getWrapped().handle(); } } But STILL i'm NOT redirected to my error page - i'm getting the same HTTP 500 error like above. What am i doing wrong, what could be missing in my implementation so that the exception is handled correctly?

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  • What do I do about recurring billing?

    - by phidah
    This might be a subjective question, but I'll give it a go. There are already a number of questions on SO that revolves around subscription billing management. I am currently working on a SaaS solution that will require a fully automated billing system. What I am not looking for when asking this question is not advice on implementing towards a specific payment gateway or stuff like that. Instead I'd like advice on what kind of approach to take. The functionality that I need is a system that can handle upgrades, downgrades, recurring billing, cancellations, etc. Initially for one product only, but it might over time be a requirement that the system can handle multiple products (by products I mean fundamentally different products, not different variations of the same product). As I see it there are a number of possible approaches when you need a solution like this: Code a billing server yourself that supports this and is decoupled from each product so that it can handle multiple independent products. Use a hosted solution like Recurly, Chargify, Spreedly or CheddarGetter. The advantage of using a hosted solution is obviously that you don't need PCI certification, the concern is outsourced and it is a lot faster to get up and running. These advantages come at a cost however: The most important support function for your product - i.e. the billing is not in your control. Additionally you have less control and flexibility. What would you do? If we look beyond the PCI requirements I would definately prefer to have a system coded in-house that could do this kind of job. On the other hand I've heard from numerous sources that coding a system like this is a pain. Any advice is highly appreciated. Also, if you advice to code it yourself, any experiences on how to do it or if there are any opensource projects (no matter the language, what I'm after is not the code but the structure) that I can benefit from would really mean alot. Thanks in advance for your inputs! :-)

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  • SlidingDrawer overlap the listview

    - by vycon
    protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); cursor = fetchAllDiary(); this.setListAdapter(new DiaryListAdapter(this, cursor, true)); View drawer_view = mInflater.inflate(R.layout.drawer, null); LayoutParams params = new LayoutParams(200,150); getWindow().addContentView(drawer_view, params); } <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/frameLayout"> <SlidingDrawer android:id="@+id/diary_list_row_drawer" android:layout_height="wrap_content" android:handle="@+id/handle" android:content="@+id/content" android:orientation="vertical" android:layout_width="fill_parent" android:topOffset="50px"> <ImageView android:id="@id/handle" android:layout_width="fill_parent" android:layout_height="wrap_content" android:src="@drawable/bottom_switcher_collapsed" /> <LinearLayout android:id="@id/content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@color/backround_color_lightblue1"> <Button android:text="Button01" android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <Button android:text="Button02" android:id="@+id/Button02" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout> </SlidingDrawer> </LinearLayout>

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  • wxOSX/Carbon: wxGLCanvas mouse offset in non-floating window classes

    - by srose
    Hi All, I mainly program plugins using wxWidgets within a Carbon bundle which is loaded at runtime. The host-applications where my plugins are running in provide a native window handle (WindowRef), which I can use to add my custom, wxWidgets-based GUI-classes. To use the native window handle with wxWidgets classes I had to write a wxTopLevelWindow wrapper class, which does all the WindowRef encapsulation. So far, this works pretty well, but under some circumstances I got vertical mouse offsets within a wxGLCanvas if the window class of the native window handle is not of the type "kFloatingWindowClass". I am able to bypass the problem if I display an info panel (wxPanel) over the whole wxGlCanvas and if the user hides the info panel then the mouse offset is gone. Now my questions: Is there a "simple" explanation for this behaviour? Is it possible to use certain method calls to imitate info panel effect without using the panel itself? I tried several combinations of Update() and Refresh() calls of all involved components, but none of them worked so far. Even the use of wxSizer couldn't help here. Window hierarchy used by plugin-applications: wxCustomTopLevelWindow (WindowRef provided by host-application) wxPanel (parent window for all application panel) wxPanel (application info panel) wxPanel (application main panel) wxPanel (opengl main panel) wxGlCanvas (main opengl canvas) Any ideas? Any help is very appreciated.

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  • How to catch a HTTP 404 in Flash

    - by Quandary
    When I execute the (2nd) below code with a wrong url (number '1' added at the URL end), I get the below error. How can I catch this error, in case the url is wrong, so that I can give out an error message to the user ? Error opening URL 'http://localhost/myapp/cgi-bin/savePlanScale.ashx1?NoCache%5FRaumplaner=F7CF6A1E%2D7700%2D8E33%2D4B18%2D004114DEB39F&ScaleString=5%2E3&ModifyFile=data%2Fdata%5Fzimmere03e1e83%2D94aa%2D488b%2D9323%2Dd4c2e8195571%2Exml' httpStatusHandler: [HTTPStatusEvent type="httpStatus" bubbles=false cancelable=false eventPhase=2 status=404] status: 404 Error: Error #2101: Der an URLVariables.decode() übergebene String muss ein URL-kodierter Abfrage-String mit Name/Wert-Paaren sein. at Error$/throwError() at flash.net::URLVariables/decode() at flash.net::URLVariables() at flash.net::URLLoader/onComplete() public static function NotifyASPXofNewScale(nScale:Number) { var strURL:String ="http://localhost/myapp/cgi-bin/savePlanScale.ashx1" // CAUTION: when called from website, RELATIVE url... var scriptRequest:URLRequest = new URLRequest(strURL); var scriptLoader:URLLoader = new URLLoader(); // loader.dataFormat = URLLoaderDataFormat.TEXT; // default, returns as string scriptLoader.dataFormat = URLLoaderDataFormat.VARIABLES; // returns URL variables // loader.dataFormat = URLLoaderDataFormat.BINARY; // to load in images, xml files, and swf instead of the normal methods var scriptVars:URLVariables = new URLVariables(); scriptLoader.addEventListener(Event.COMPLETE, onLoadSuccessful); scriptLoader.addEventListener(IOErrorEvent.IO_ERROR, onLoadError); scriptLoader.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler); scriptLoader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, onSecurityError); scriptVars.NoCache_Raumplaner = cGUID.create(); scriptVars.ScaleString = nScale; scriptVars.ModifyFile = "data/data_zimmere03e1e83-94aa-488b-9323-d4c2e8195571.xml"; scriptRequest.method = URLRequestMethod.GET; scriptRequest.data = scriptVars; scriptLoader.load(scriptRequest); function httpStatusHandler(event:HTTPStatusEvent):void { trace("httpStatusHandler: " + event); trace("status: " + event.status); } function onLoadSuccessful(evt:Event):void { trace("cSaveData.NotifyASPXofNewScale.onLoadSuccessful"); trace("Response: " + evt.target.data); ExternalInterface.call("alert", "Die neue Skalierung wurde erfolgreich gespeichert."); //getURL("javascript:alert(\""+"Die neue Skalierung wurde erfolgreich gespeichert.\\nALLE Instanzen des Browsers schliessen und neu starten, damit die Änderung in Kraft tritt."+"\");"); if (evt.target.data.responseStatus == "YOUR FAULT") { trace("Error: Flash transmitted an illegal scale value."); ExternalInterface.call("alert", "Fehler: Flash konnte die neue Skalierung nicht abspeichern."); } if (evt.target.data.responseStatus == "EXCEPTION") { trace("Exception in ASP.NET: " + evt.target.data.strError); ExternalInterface.call("alert", "Exception in ASP.NET: " + evt.target.data.strError); } } function onLoadError(evt:IOErrorEvent):void { trace("cSaveData.NotifyASPXofNewScale.onLoadError"); trace("Error: ASPX or Transmission error. ASPX responseStatus: " + evt); ExternalInterface.call("alert", "ASPX - oder Übertragungsfehler.\\nASPX responseStatus: " + evt); //getURL("javascript:alert(\"" + "ASPX - oder Übertragungsfehler.\\nASPX responseStatus: " + receiveVars.responseStatus + "\");"); } function onSecurityError(evt:SecurityErrorEvent):void { trace("cSaveData.NotifyASPXofNewScale.onSecurityError"); trace("Security error: " + evt); ExternalInterface.call("alert", "Sicherheitsfehler. Beschreibung: " + evt); } }

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  • jquery ui slider IE7 bug...

    - by Reigel
    When you are holding the handles to slide them the width of the range blows out to 100% width, but snaps back to the width it's supposed to be once you release the handle. jQuery 1.4.2 UI 1.8.2 please help jQuery if ($("#topImageSlider").length){ var max = 120; var initialValue = 40; function refreshValue(){ //$('#sliderValue .current').text($("#topImageSlider").slider("value")); $('#sliderValue .current').text($('.ui-slider-range').width()); } $("#topImageSlider").slider({ orientation: 'horizontal', range: "min", max: max, min: 1, value: initialValue, slide: refreshValue, change: refreshValue }).after('<div id="sliderValue"><span class="current">'+ initialValue +'</span> / <span class="max">'+ max +'</span></div>'); } css #topImageSlider, #sliderValue { margin: 0 auto; width: 572px; text-align: center; } #topImageSlider { margin-top: 20px; background: url(../img/bg/slider.png) no-repeat; height: 5px; } #topImageSlider .ui-slider-range { background: url(../img/bg/slider-progress.gif) repeat-x; left: 2px; height: 5px; } #topImageSlider .ui-slider-handle { background: url(../img/btn/slider-handle.png) no-repeat; width: 24px; height: 24px; top: -8px; outline: 0; cursor: pointer; z-index: 999; } #sliderValue { margin-top: 10px; color: #bbb; font-weight: bold; } #sliderValue .current { color: #ff6e0d; }

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  • Lists NotifyPropertyChanging

    - by Carlo
    Well BindingList and ObservableCollection work great to keep data updated and to notify when one of it's objects has changed. However, when notifying a property is about to change, I think these options are not very good. What I have to do right now to solve this (and I warn this is not elegant AT ALL), is to implement INotifyPropertyChanging on the list's type object and then tie that to the object that holds the list PropertyChanging event, or something like the following: // this object will be the type of the BindingList public class SomeObject : INotifyPropertyChanging, INotifyPropertyChanged { private int _intProperty = 0; private string _strProperty = String.Empty; public int IntProperty { get { return this._intProperty; } set { if (this._intProperty != value) { NotifyPropertyChanging("IntProperty"); this._intProperty = value; NotifyPropertyChanged("IntProperty"); } } } public string StrProperty { get { return this._strProperty; } set { if (this._strProperty != value) { NotifyPropertyChanging("StrProperty"); this._strProperty = value; NotifyPropertyChanged("StrProperty"); } } } #region INotifyPropertyChanging Members public event PropertyChangingEventHandler PropertyChanging; #endregion #region INotifyPropertyChanged Members public event PropertyChangedEventHandler PropertyChanged; #endregion public void NotifyPropertyChanging(string propertyName) { if (this.PropertyChanging != null) PropertyChanging(this, new PropertyChangingEventArgs(propertyName)); } public void NotifyPropertyChanged(string propertyName) { if (this.PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } public class ObjectThatHoldsTheList : INotifyPropertyChanging, INotifyPropertyChanged { public BindingList<SomeObject> BindingList { get; set; } public ObjectThatHoldsTheList() { this.BindingList = new BindingList<SomeObject>(); } // this helps notifie Changing and Changed on Add private void AddItem(SomeObject someObject) { // this will tie the PropertyChanging and PropertyChanged events of SomeObject to this object // so it gets notifies because the BindingList does not notify PropertyCHANGING someObject.PropertyChanging += new PropertyChangingEventHandler(someObject_PropertyChanging); someObject.PropertyChanged += new PropertyChangedEventHandler(someObject_PropertyChanged); this.NotifyPropertyChanging("BindingList"); this.BindingList.Add(someObject); this.NotifyPropertyChanged("BindingList"); } // this helps notifies Changing and Changed on Delete private void DeleteItem(SomeObject someObject) { if (this.BindingList.IndexOf(someObject) > 0) { // this unlinks the handlers so the garbage collector can clear the objects someObject.PropertyChanging -= new PropertyChangingEventHandler(someObject_PropertyChanging); someObject.PropertyChanged -= new PropertyChangedEventHandler(someObject_PropertyChanged); } this.NotifyPropertyChanging("BindingList"); this.BindingList.Remove(someObject); this.NotifyPropertyChanged("BindingList"); } // this notifies an item in the list is about to change void someObject_PropertyChanging(object sender, PropertyChangingEventArgs e) { NotifyPropertyChanging("BindingList." + e.PropertyName); } // this notifies an item in the list has changed void someObject_PropertyChanged(object sender, PropertyChangedEventArgs e) { NotifyPropertyChanged("BindingList." + e.PropertyName); } #region INotifyPropertyChanging Members public event PropertyChangingEventHandler PropertyChanging; #endregion #region INotifyPropertyChanged Members public event PropertyChangedEventHandler PropertyChanged; #endregion public void NotifyPropertyChanging(string propertyName) { if (this.PropertyChanging != null) PropertyChanging(this, new PropertyChangingEventArgs(propertyName)); } public void NotifyPropertyChanged(string propertyName) { if (this.PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } Sorry, I know this is a lot of code, which takes me back to my main point IT'S A LOT OF CODE to implement this. So my question is, does anyone know a better, shorter, more elegant solution? Thanks for your time and suggestions.

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  • Read binary file into a struct C#

    - by Robert Höglund
    I'm trying to read binary data using C#. I have all information about the layout of the data in the files I want to read. I'm able to read the data "chunk by chunk", i.e. getting the first 40 bytes of data converting it to a string, get the next 40 bytes, ... Since there are at least three slighlty different version of the data, I would like to read the data directly into a struct. It just feels so much more right than by reading it "line by line". I have tried the following approach but to no avail:StructType aStruct; int count = Marshal.SizeOf(typeof(StructType)); byte[] readBuffer = new byte[count]; BinaryReader reader = new BinaryReader(stream); readBuffer = reader.ReadBytes(count); GCHandle handle = GCHandle.Alloc(readBuffer, GCHandleType.Pinned); aStruct = (StructType) Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(StructType)); handle.Free(); The stream is an opened FileStream from which I have began to read from. I get an AccessViolationException when using Marshal.PtrToStructure. The stream contains more information than I'm trying to read since I'm not interested in data at the end of the file. The struct is defined like:[StructLayout(LayoutKind.Explicit)] struct StructType { [FieldOffset(0)] public string FileDate; [FieldOffset(8)] public string FileTime; [FieldOffset(16)] public int Id1; [FieldOffset(20)] public string Id2; } The examples code is changed from original to make this question shorter. How would I read binary data from a file into a struct?

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  • Business Logic Layer Pattern on Rails? MVCL

    - by Fabiano PS
    That is a broad question, and I appreciate no short/dumb asnwers like: "Oh that is the model job, this quest is retarded (period)" PROBLEM Where I work at people created a system over 2 years for managing the manufacture process over demand in the most simplified still broad as possible, involving selling, buying, assemble, The system is coded over Ruby On Rails. The app has been changed lots of times and the result is a mess on callbacks (some are called several times), 200+ models, and fat controllers: Total bad. The QUESTION is, if there is a gem, or pattern designed to handle Rails large app logic? The logic whould be able to fully talk to models (whose only concern would be data format handling and validation) What I EXPECT is to reduce complexity from various controllers, and hard to track callbacks into files with the responsibility to handle a business operation logic. In some cases there is the need to wait for a response, in others, only validation of the input is enough and a bg process would take place. ie: -- Sell some products (need to wait the operation to finish) 1. Set a View able to get the products input 2. Controller gets the product list inputed by employee and call the logic Logic::ExecuteWithResponse('sell', 'products', :prods => @product_list_with_qtt, :when => @date, :employee => current_user() ) This Logic would handle buying order, assemble order, machine schedule, warehouse reservation, and others. Have in mind that a callback on SalesOrder is not enough, since it depends on where it is called (no field for that), depends on the class of the user, among other stuff not visible for the model, or in some cases it would take long for the model to process.

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  • Database structure and source control - best practice

    - by Paddy
    Background I came from several years working in a company where all the database objects were stored in source control, one file per object. We had a list of all the objects that was maintained when new items were added (to allow us to have scripts run in order and handle dependencies) and a VB script that ran to create one big script for running against the database. All the tables were 'create if not exists' and all the SP's etc. were drop and recreate. Up to the present and I am now working in a place where the database is the master and there is no source control for DB objects, but we do use redgate's tools for updating our production database (SQL compare), which is very handy, and requires little work. Question How do you handle your DB objects? I like to have them under source control (and, as we're using GIT, I'd like to be able to handle merge conflicts in the scripts, rather than the DB), but I'm going to be pressed to get past the ease of using SQL compare to update the database. I don't really want to have us updating scripts in GIT and then using SQL compare to update the production database from our DEV DB, as I'd rather have 'one version of the truth', but I don't really want to get into re-writing a custom bit of software to bundle the whole lot of scripts together. I think that visual studio database edition may do something similar to this, but I'm not sure if we will have the budget for it. I'm sure that this has been asked to death, but I can't find anything that seems to quite have the answer I'm looking for. Similar to this, but not quite the same: http://stackoverflow.com/questions/340614/what-are-the-best-practices-for-database-scripts-under-code-control

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  • C# wrapper and Callbacks

    - by fergs
    I'm in the process of writing a C# wrapper for Dallmeier Common API light (Camera & Surviellance systems) and I've never written a wrapper before, but I have used the Canon EDSDK C# wrapper. So I'm using the Canon wrapper as a guide to writing the Dallmeier wrapper. I'm currently having issues with wrapping a callback. In the API manual it has the following: dlm_connect int(unsigned long uLWindowHandle, const char * strIP, const char* strUser1, const char* strPwd1, const char* strUser2, const char* strPwd2, void (*callback)(void *pParameters, void *pResult, void *pInput), void * pInput) Arguments - ulWindowhandle - handle of the window that is passed to the ViewerSDK to display video and messages there - strUser1/2 - names of the users to log in. If only single user login is used strUser2 is - NULL - strPwd1/2 - passwords of both users. If strUser2 is NULL strPwd2 is ignored. Return This function creates a SessionHandle that has to be passed Callback pParameters will be structured: - unsigned long ulFunctionID - unsigned long ulSocketHandle, //handle to socket of the established connection - unsigned long ulWindowHandle, - int SessionHandle, //session handle of the session created - const char * strIP, - const char* strUser1, - const char* strPwd1, - const char* strUser2, - const char * strPWD2 pResult is a pointer to an integer, representing the result of the operation. Zero on success. Negative values are error codes. So from what I've read on the Net and Stack Overflow - C# uses delegates for the purpose of callbacks. So I create a my Callback function : public delegate uint DallmeierCallback(DallPparameters pParameters, IntPtr pResult, IntPtr pInput); I create the connection function [DllImport("davidapidis.dll")] public extern static int dlm_connect(ulong ulWindowHandle, string strIP, string strUser1, string strPwd1, string strUser2, string strPwd2, DallmeierCallback inDallmeierFunc And (I think) the DallPParameters as a struct : [StructLayout(LayoutKind.Sequential)] public struct DallPParameters { public ulong ulfunctionID; public ulong ulsocketHandle; public ulong ulWindowHandle; ... } All of this is in my wrapper class. Am I heading in the right direction or is this completely wrong?

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