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• Windows system monitoring and profiling

  - by Aris

  I have several dozen 64-bit Windows 2003 servers in a high performance environment with very bursty system utilization. I am looking for a tool (or tools) to monitor and analyze system performance (eg, CPU utilization, bandwidth, etc). This tool can either query servers from a central location (SNMP) or require installation of a component on each server. It should poll on a 1-second interval. It should be able to generate pretty graphs which show trends over time. As a nice-to-have, it should be able to send out emails or IMs when certain thresholds are exceeded. The tools I have investigated so far, including Solarwinds and PRTG, are not designed to poll this frequently. They seem to be designed for a ~30-second interval. Solarwinds wouldn't go lower than 3-sec, and PRTG chokes at 1-sec. They both default to 1-min. All three tools seem more focused on outage monitoring and reporting than metric collection. Given the bursty nature of our applications, such infrequent polling would result in a very inaccurate picture of performance. I am considering rolling my own solution using perfmon. This would be a lot of work, and seems like reinventing the wheel. Are there any tools out there that meet my needs?

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• Backend raising (INotify)PropertyChanged events to all connected clients?

  - by Jörg Battermann

  One of our 'frontend' developers keeps requesting from us backend developers that the backend notifies all connected clients (it's a client/server environment) of changes to objects. As in: whenever one user makes a change, all other connected clients must be notified immediately of the change. At the moment our architecture does not have a notification system of that kind and we don't have a sort of pub/sub model for explicitly chosen objects (e.g. the one the frontend is currently implementing).. which would make sense in such a usecase imho, but obviously requires extra implementation. However, I thought frontends typically check for locks for concurrently existing user changes on the same object and rather pull for changes / load on demand and in the background rather than the backend pushing all changes to all clients for all objects constantly.. which seems rather excessive to me. However, it's being argumented that e.g. the MS Entity Framework does in fact publish (INotify)PropertyChanged not only for local changes, but for all such changes including other client connections, but I have found no proof or details regarding this. Can anyone shed some light into this? Do other e.g. ORMs etc provide broadcasted (INotify)PropertyChanged events on entities?

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• Transition from 2D to 3D later in game development

  - by Axarydax

  Hi, I'd like to work on a game, but for rapidly prototyping it, I'd like to keep it as simple as possible, so I'd do everything in top-down 2D in GDI+ and WinForms (hey, I like them!), so I can concentrate on the logic and architecture of the game itself. I thinking about having the whole game logic (server) in one assembly, where the WinForms app would be a client to that game, and if/when the time is right, I'd write a 3D client. I am tempted to use XNA, but I haven't really looked into it, so I don't know if it won't take too much time getting up to speed - I really don't want to spent much time doing other stuff than the game logic, at least while I have the inspiration. But I wouldn't have to abandon everything and transfer to new platform when transitioning from 2D to 3D. Another idea is just to get over it and learn XNA/Unity/SDL/something at least to that level so I can make the same 2D version as I could in GDI+, and I won't have to worry about switching frameworks anymore. Let's just say that the game is the kind where you watch a dude from behind, you run around the gameworld and interact with objects. So the bird's eye perspective could be doable for now. Thanks.

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• Java equivalent to VS solution file

  - by Chris

  I'm a C# guy trying to learn Java. I understand the syntax and the basic architecture of the Java platform, and have no problem doing smaller projects myself, but I'd really like to be able to download some open source projects to learn from the work of others. However, I'm running into a stumbling block that I can't seem to find any information on. When I download an open source .NET project, I can open the .sln file with visual studio and everything just loads. Sure, there's occasionally a missing reference or something, but there's really very little configuration required to get things going. I'm not sensing the same ease of use with Java. I'm using eclipse at the moment, and it feels like for every project I have to create a brand new Eclipse project using "create from existing source", and almost nothing compiles properly without significant reconfiguration. In the case of web projects, it's even worse, because Eclipse doesn't appear to support creating a web project from existing source. I have to create a standard Java project from source, then then apparently modify the project file to include the bindings for the web toolkit stuff to work properly. Assuming I want to be able to contribute to a project later on, I shouldn't have to be making such drastic changes to the file structure to get my IDE to a workable state. What am I missing?

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• How to scroll programmetically to selected cover in coverflow view ?

  - by hib

  Hi all , I am using a coverflow component for my application . It is working nicely till now . But now I want to scroll to selected cover in coverflow . I am currently doing this : TKCoverView *cover = [self.coverflow coverAtIndex:currentIndex]; CGRect frame = cover.frame ; frame.origin.x = frame.origin.x * 1.2; // **main setting** [self.coverflow bringCoverAtIndexToFront:currentIndex animated:YES]; [self.coverflow scrollRectToVisible:frame animated:YES]; and the cover At index method - (TKCoverView*) coverflowView:(TKCoverflowView*)coverflowView coverAtIndex:(int)index{ TKCoverView *cover = [coverflowView dequeueReusableCoverView]; NSLog(@"Index value :%i",index); if(cover == nil){ cover = [[[TKCoverView alloc] initWithFrame:CGRectMake(0, 0, 224, 300)] autorelease]; // 224 cover.baseline = 224; cover.image = [UIImage imageNamed:@"Placeholder_2.png"]; cover.tag = index; }else { cover.image = ((object *)[array objectAtIndex:index]).appIconNormal; } return cover; and - (TKCoverView*) dequeueReusableCoverView{ if(yard == nil || [yard count] < 1) return nil; TKCoverView *v = [[[yard lastObject] retain] autorelease]; v.layer.transform = CATransform3DIdentity; [yard removeLastObject]; return v; } So can any one tell me what is the perfect and standard way of setting the frame for the scrollRectToVisibleRegion method .

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• Weird error running com-exposed assembly

  - by Bernabé Panarello

  I am facing the following issue when deploying a com-exposed assembly to my client's. The COM component should be consummed by a vb6 application. Here's how it's done 1) I have one c# project which has a class with a couple of methods exposed to COM 2) The project has references to multiple assemblies 3) I compile the project, generating a folder (named dllcom) that contains the assembly plus all the referenced dlls 4) I include in the folder a .bat which does the following: regasm /u c:\dllcom\LibInsertador.dll del LibInsertador.tlb regasm c:\dllcom\LibInsertador.dll /tlb:c:\dllcom\LibInsertador.tlb /codebase c:\dllcom\ pause 5) After running the bat locally in many workstations of my laboratory, i'm able to consume the generated tlb from my vb6 application without any problems. I'm even able to update the dll by only means of running this bat, without having to recompile the vb6 application. I mean that im not having issues of vb6 fiding and invoking the exposed com object. The problem 6) I send the SAME FOLDER to my client 7) They execute the .bat locally, without any errors 8) They execute the vb6 application, vb6 finds the main assembly, the .net code seems to run correctly (it's even able to generate a log file) until it has to intantiate it's first referenced assembly. Then, they get the following exception: "Could not load type 'GYF.Common.TypeBuilder' from assembly 'GYF_Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'." Where "GYF.Common" is an assembly referenced by LibInsertador and TypeBuilder is a class contained in GYF.Common. GYF.Common is not a signed assembly and it's not in the GAC, just in the same folder with Libinsertador. According to .net reflector, the version is correct. ¿Any ideas about what could be happening?

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• dojo.io.iframe erroring when uploading a file

  - by Grant Collins

  Hi, Hit an interesting problem today when trying to upload an image file < 2MB using dojo.io.iframe. My function to process the form is called, but before the form is posted to the server I am getting the following error: TypeError: ifd.getElementsByTagName("textarea")[0] is undefined My function that is used to action the post of the form is : function uploadnewlogo(){ var logoDiv = dojo.byId('userlogo'); var logoMsg = dojo.byId('uploadmesg'); //prep the io frame to send logo data. dojo.io.iframe.send({ url: "/users/profile/changelogo/", method: "post", handleAs: "text", form: dojo.byId('logoUploadFrm'), handle: function(data,ioArgs){ var response = dojo.fromJson(data); if(response.status == 'success'){ //first clear the image //dojo.style(logoDiv, "display", "none"); logoDiv.innerHTML = ""; //then we update the image logoDiv.innerHTML = response.image; }else if(response.status == 'error'){ logoMsg.innerHTML = data.mesg; }else{ logoMsg.innerHTML = '<div class="error">Whoops! We can not process your image.</div>'; } }, error: function(data, ioArgs){ logoMsg.innerHTML = '<div class="error">' + data + '</div>'; } }); } The form is very basic with just a File input component and a simple button that calls this bit of javascript and dojo. I've got very similar code in my application that uploads word/pdf documents and that doesn't error, but for some reason this does. Any ideas or pointers on what I should try to get this to work without errors? Oh I'm using php and Zend framework for the backend if that has anything to do with it, but I doubt it as it's not even hitting the server before it fails. Many thanks, Grant

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• RESTful idempotence

  - by DutrowLLC

  I'm designing a RESTful web service utilizing ROA(Resource oriented architecture). I'm trying to work out an efficient way to guarantee idempotence for PUT requests that create new resources in cases that the server designates the resource key. From my understanding, the traditional approach is to create a type of transaction resource such as /CREATE_PERSON. The the client-server interaction for creating a new person resource would be in two parts: Step 1: Get unique transaction id for creating the new PERSON resource::: **Client request:** GET /CREATE_PERSON **Server response:** 200 OK transaction-id:"as8yfasiob" Step 2: Create the new person resource in a request guaranteed to be unique by using the transaction id::: **Client request** PUT /CREATE_PERSON/{transaction_id} first_name="Big bubba" **Server response** 201 Created // (If the request is a duplicate, it would send this PersonKey="398u4nsdf" // same response without creating a new resource. It // would perhaps send an error response if the was used // on a transaction id non-duplicate request, but I have // control over the client, so I can guarantee that this // won't happen) The problem that I see with this approach is that it requires sending two requests to the server in order to do to single operation of creating a new PERSON resource. This creates a performance issues increasing the chance that the user will be waiting around for the client to complete their request. I've been trying to hash out ideas for eliminating the first step such as pre-sending transaction-id's with each request, but most of my ideas have other issues or involve sacrificing the statelessness of the application. Is there a way to do this?

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• Method for finding memory leak in large Java heap dumps

  - by Rickard von Essen

  I have to find a memory leak in a Java application. I have some experience with this but would like advice on a methodology/strategy for this. Any reference and advice is welcome. About our situation: Heap dumps are larger than 1 GB We have heap dumps from 5 occasions. We don't have any test case to provoke this. It only happens in the (massive) system test environment after at least a weeks usage. The system is built on a internally developed legacy framework with so many design flaws that they are impossible to count them all. Nobody understands the framework in depth. It has been transfered to one guy in India who barely keeps up with answering e-mails. We have done snapshot heap dumps over time and concluded that there is not a single component increasing over time. It is everything that grows slowly. The above points us in the direction that it is the frameworks homegrown ORM system that increases its usage without limits. (This system maps objects to files?! So not really a ORM) Question: What is the methodology that helped you succeed with hunting down leaks in a enterprise scale application?

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• Silverlight performance with a large number of Objects Org Chart.

  - by KC

  Hello, I’m working on a org chart project(SL 3) and I’m seeing the UI thread hang when the chart is building around 2,000 nodes and when it renders it takes about a min and then FPS drop to a crawl. Here is the code flow. Page.xaml.cs calls a wcf service that returns a list of AD users. Then we use Linq to build a collection of nodes to bind to the Orgchart.cs OrgChart.cs is a canvas and displays a collection of nodes and connecting lines. Node.cs is a canvas and has user data can contain children nodes. NodeContent.xaml is a user control that has borders so I can set the background, textblocks to display user's data, Events that handle the selected and expaned nodes, and storyboards that resize the nodes when they are selected or expanded.I noticed during hours of debugging , here in the InitializeComponent(); section where it loads the xaml it seems to be where the preformance hit is happening. System.Windows.Application.LoadComponent(this, new System.Uri("/Silverlight.Custom;component/NodeContent.xaml", System.UriKind.Relative)); So I guess I have two questions. Can threading help in any way with the UI thread hanging while drawing the nodes? How can I avoid the hit when calling this user control? Any advice or direction anyone can lend would be greatly appreciated. Thanks, KC

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• .NET WF4: Should it be in the middle of everything?

  - by stimpy77

  I am aware that WF4 (Windows Workflow 4.0, part of .NET 4.0) is a significant rework and redesign of WF3, where much of what made WF3 a poor technology choice has been cleaned up in WF4. For example, as far as I can tell, WF4 (Windows Workflow 4.0) activities are more or less testable with [TestMethod] and mocking. This among other things, like improved performance, has grabbed my attention about the technology again, whereas I had previously pooh-poohed WF3. I'm working on a new architecture for essentially an n-tier collaborative application (not enterprise-class, just a smallish project with potential to grow significantly) where I'm already trying to discipline myself to use IoC and, to some extent, TDD, and I'm wondering, in general terms, whether it is wiser to just hand-code workflow logic or if I should delve into learning and integrating WF4 so that WF becomes literally the controller of the entire application, i.e. the practical C in "MVC" (not ASP.NET MVC but rather the pattern). So should workflow activities in WF4 be the primary controller for a highly expandable/growable web-based collaborative application? Or am I asking entirely the wrong question? This is a vague question, I'm sure, so abstract answers are as welcome as specific ones.

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• Maintaining a Python web application: heavier vs lighter framework?

  - by Tiberiu Ana

  Five+ years from now, you are hired to support and extend a data-centric web application written in Python that hasn't been kept up to date. Would you rather prefer it was written in the current version of Django/Pylons at the time, using the available standard components, or kept minimal with something like CherryPy/web.py and a few library dependencies? Heavy framework Advantages: standard approach to application design and structure, as encouraged by framework; less application code to worry about. Disadvantages: requires learning the framework to understand how things work; broken things in old version of framework difficult to fix; upgrading to new version potentially difficult due to changing APIs; finding relevant documentation/help potentially difficult due to changing APIs. Light framework Advantages: most application code is directly "visible"; only needed features are implemented; architecture should be simpler to understand; less need to upgrade external dependencies; easier to upgrade external dependencies. Disadvantages: some reinventing the wheel; non-standard design and structure (with the associated unique issues and bugs). I will update the list with any helpful answers.

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• Compile MonoDevelop 4.2.3

  - by user2942643

  I need help, I'm trying to compile monodevelop code, but when I use the command "./configure" tells me that I need to have installed a version of mono, but I have it installed [raven@localhost ~]$ mono -V Mono JIT compiler version 3.2.8 (tarball Fri May 30 08:15:47 CDT 2014) Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com TLS: __thread SIGSEGV: altstack Notifications: epoll Architecture: amd64 Disabled: none Misc: softdebug LLVM: supported, not enabled. GC: sgen [raven@localhost ~]$ cd /home/raven/Downloads/monodevelop-4.2.3 [raven@localhost monodevelop-4.2.3]$ ./configure checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... yes checking for a thread-safe mkdir -p... /usr/bin/mkdir -p checking for gawk... gawk checking whether make sets $(MAKE)... yes checking how to create a ustar tar archive... gnutar checking whether to enable maintainer-specific portions of Makefiles... no checking for mono... /usr/local/bin/mono checking for gmcs... /usr/local/bin/gmcs checking for pkg-config... /usr/bin/pkg-config configure: error: You need mono 3.0.4 or newer [raven@localhost monodevelop-4.2.3]$

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• Objective-C Protocols within Protocols

  - by LucasTizma

  I recently began trying my hand at using protocols in my Objective-C development as an (obvious) means of delegating tasks more appropriately among my classes. I completely understand the basic notion of protocols and how they work. However, I came across a roadblock when trying to create a custom protocol that in turn implements another protocol. I since discovered the solution, but I am curious why the following DOES NOT work: @protocol STPickerViewDelegate < UIPickerViewDelegate > - ( void )customCallback; @end @interface STPickerView : UIPickerView { id < STPickerViewDelegate > delegate; } @property ( nonatomic, assign ) id < STPickerViewDelegate > delegate; @end Then in a view controller, which conforms to STPickerViewDelegate: STPickerView * pickerView = [ [ STPickerView alloc ] init ]; pickerView.delegate = self; - ( void )customCallback { ... } - ( NSString * )pickerView:( UIPickerView * )pickerView titleForRow:( NSInteger )row forComponent:( NSInteger )component { ... } The problem was that pickerView:titleForRow:forComponent: was never being called. On the other hand, customCallback was being called just fine, which isn't too surprising. I don't understand why STPickerViewDelegate, which itself conforms to UIPickerViewDelegate, does not notify my view controller when events from UIPickerViewDelegate are supposed to occur. Per my understanding of Apple's documentation, if a protocol (A) itself conforms to another protocol (B), then a class (C) that conforms to the first protocol (A) must also conform to the second protocol (B), which is exactly the behavior I want and expected. What I ended up doing was removing the id< STPickerViewDelegate > delegate property from STViewPicker and instead doing something like the following in my STViewPicker implementation where I want to evoke customCallback: if ( [ self.delegate respondsToSelector:@selector( customCallback ) ] ) { [ self.delegate performSelector:@selector( customCallback ) ]; } This works just fine, but I really am puzzled as to why my original approach did not work.

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• Rich faces and dataTable

  - by ortho

  Hi all :) I have the question regarding rich faces and beans. I have a jsp page that is using richfaces and inside it I have the: rich:extendedDatatable component, that takes data from my MainBean as ArrayList (this bean queries the mySQL and puts results to the ArrayList that populates the dataTable later on). There are 4 columns in datatable, first 3 are h:outputLabels and the last one is checkbox. Now I have a question: how can I get information from selected row ? I mean, when user clicks checkbox, I want to take the id/name or whatever that is associated to this particular row, then when user clicks on Apply changed a4j: button I will update the database and when user logs in back again he will see updated info: e.g. checkbox is selected/not selected now because the user checked that. I believe that is a simple query for someone who worked with it. For me ex. flash developer it would be easy in as3, but here I didnt find the solution yet, please help. Thank you in advance, Kindest regards

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• weird swing heavyweight object lightweight objects problem

  - by Yoav Schwartz

  Hello, We have a problem in our swing based application since we've upgraded our java version from 6u5 to 6u18 (The application runs over WinXP). Our application contains a Canvas object which resides in a JFrame. The application draws things on the canvas. Every time we drag a lightweight swing object (popup or another frame) over the canvas, it has a refresh problem. It blinks - becomes black. The problem only resolves after we move the swing component away from the canvas and click on it again. We think this problem is related to the fact the the canvas is a heavyweight object. And we know there were changes done in the new versions of java on the mixing of heavyweight and lightweight objects issue. Some more details: 1) Our problem reproduces in java 6u14 and 6u16. 2) Everything works fine in java 6u5. Another strange thing: We have 2 types of stations running our application. The first type has a ATI FireGL7100 PCI-E graphics card. The second type has a Matrox G450 PCI graphic card. The problem does not reproduce on the Matrox based station in any java version. One more thing: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6829858 - looks similar to our problem. Is our problem familiar? Do you have any suggestions (workarounds, ideas how the difference in graphics cards is connected to this problem) Hope I was clear enough, Yoav

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• What java web framework best accomodates web ui designers?

  - by Brian Laframboise

  What Java web framework out there best supports a role of "web UI designer", that is, lets you: Use popular web design tools (xhtml validators, css editors, what have you) on your views/pages View changes without running on a server Rapidly prototype different UI options Supports a (somewhatly) clean separation between "developer" and "designer" (terminology intentionally vague) We, like many others, have found these capabilities sorely lacking in our large, legacy Struts 1.x apps that use lots of JSP fragments and includes. We've decided to port our apps to a JSR-168/268 portal environment, but we have not decided on what Java web framework will power the portlets. We're open to any kind (action-based, component-based, etc) and a key criterion is how well it supports the role described above. I'm intrigued by Tapestry which claims that its views are XHTML compliant pages (that simply have extra Tapestry-specific attributes added onto them to be processed at runtime). This sounds like it would play well with a web ui designer's toolkit. However, I'd like to know if this is what actually happens in the real world, or if compromises are necessary. Of course, if there's something much better than Tapestry, I'd love to hear about it!

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• H.264 / FLV best practices for HTML

  - by Steve Murch

  I run a website with about 700 videos (And no, it's not porn -- get your mind out of the gutter :-) ). The videos are currently in FLV format. We use the JWPlayer to render those videos. IIS6 hosted. Everything works just fine. As I understand it, H.264 (not FLV and likely not OGG) is the emerging preferred HTML5 video standard. Today, the iPad really only respects H.264 or YouTube. Presumably, soon many more important browsers will follow Apple's lead and respect only the HTML5 tag. OK, so I think I can figure out how to convert my existing videos into the proper H.264 format. There are various tools available, including ffmpeg.exe. I haven't tried it yet, but I don't think that's going to be a problem after fiddling with the codec settings. My question is more about the container itself -- that is, planning graceful transition for all users. What's the best-practice recommendation for rendering these videos? If I just use the HTML5 tag, then presumably any browser that doesn't yet support HTML5 won't see the videos. And if I render them in Flash format via the JWPlayer or some other player, then they won't be playable on the iPad. Do I have to do ugly UserAgent detection here to figure out what to render? I know the JWPlayer supports H.264 media, but isn't the player itself a Flash component and therefore not playable on the iPad? Sorry if I'm not being clear, but I'm scratching my head on a graceful transition plan that will work for current browsers, the iPad and the upcoming HTML5 wave. I'm not a video expert, so any advice would be most welcome, thanks.

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• Dojo: Programatically setting checkbox label for adding on TableContainer

  - by Det

  Hi there, after some hours of checking out documentation, I am somewhat desperate: Basically I need to populate a TabContainer with some TextBoxes, and some Checkboxes. All theses neatly arranged: Labels to the left, fields to the right. To have this done I use a TableContainer that I add to the TabContainer, create the TextFields and add them to the TableContainer. All is rendered ok. But when it comes to a checkbox, I can't find the trick to have a label displayed at all. If I: - add a label-attribute to creation statement say: var text8 = new dijit.form.CheckBox({ id:"zuschauer_" + i, value: "zuschauer", label:"fritt"}); Firefox comes up with a "containerNode is null" - Error try to add a tag: Nothing is shown (no error, but alas: no label): var text9 = dojo.create('<label>'); dojo.attr(text9,"for","zuschauer_" + i); dojo.attr(text9,"content","fritt"); try to add a div or somewhat else on the tablecontainer (disabled Labels): Firefox comes up whith: Error: uncaught exception: [Exception... "Component returned failure code: 0x80004003 (NS_ERROR_INVALID_POINTER) [nsIDOMHTMLDivElement.appendChild]" nsresult: "0x80004003 (NS_ERROR_INVALID_POINTER)" location: "JS frame :: ... same is for created TextNodes... So how the hack: - Would I generate a label to a checkbox programatically (no html template possible, I've seen the code around, creating a checkbox but having a 'label for' on the html before. This would not be helpful, as I don't know how many checkboxes I need at designtime. These are to be genereated completly at runtime. - Would I have this very simple design done programatically, Must be easy, this is not rocket sience. Do I really need the TableContainer to have this done? - Can I create static text in a TableContainer? Any hint would be helpful Desperate Det

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• SQL Server CLR stored procedures in data processing tasks - good or evil?

  - by Gart

  In short - is it a good design solution to implement most of the business logic in CLR stored procedures? I have read much about them recently but I can't figure out when they should be used, what are the best practices, are they good enough or not. For example, my business application needs to parse a large fixed-length text file, extract some numbers from each line in the file, according to these numbers apply some complex business rules (involving regex matching, pattern matching against data from many tables in the database and such), and as a result of this calculation update records in the database. There is also a GUI for the user to select the file, view the results, etc. This application seems to be a good candidate to implement the classic 3-tier architecture: the Data Layer, the Logic Layer, and the GUI layer. The Data Layer would access the database The Logic Layer would run as a WCF service and implement the business rules, interacting with the Data Layer The GUI Layer would be a means of communication between the Logic Layer and the User. Now, thinking of this design, I can see that most of the business rules may be implemented in a SQL CLR and stored in SQL Server. I might store all my raw data in the database, run the processing there, and get the results. I see some advantages and disadvantages of this solution: Pros: The business logic runs close to the data, meaning less network traffic. Process all data at once, possibly utilizing parallelizm and optimal execution plan. Cons: Scattering of the business logic: some part is here, some part is there. Questionable design solution, may encounter unknown problems. Difficult to implement a progress indicator for the processing task. I would like to hear all your opinions about SQL CLR. Does anybody use it in production? Are there any problems with such design? Is it a good thing?

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• SL 3 navigation not working!

  - by Silver Gun

  Hey Guys I converted all my existing Silverlight app UserControls to Pages so I could use the Navigation Framework. Anyway so I created a UserControl called MyFrame, which would host all the pages. In my App.xaml.cs I have the following to make sure that MyFrame is loaded when the App loads: private void Application_Startup(object sender, StartupEventArgs e) { this.RootVisual = new MyFrame(); } My UriMapper class resides in App.xaml and looks like the following: <navcore:UriMapper x:Key="uriMapper"> <navcore:UriMapping Uri="Login" MappedUri="Login.xaml"> </navcore:UriMapper> Within my 'MyFrame' class, I have the following <StackPanel Orientation="Horizontal"> <StackPanel Orientation="Vertical"> <HyperlinkButton Tag="Login" Content="Login" Click="HyperlinkButton_Click" /> </StackPanel> <StackPanel Orientation="Vertical"> <navigation:Frame x:Name="ContentFrame" Style="{StaticResource ContentFrameStyle}" /> </StackPanel> </StackPanel> And within the callback for my HyperlinkButton's event handler, I have the following: private void HyperlinkButton_Click(object sender, RoutedEventArgs e) { ContentFrame.Navigate(new Uri((sender as HyperlinkButton).Tag.ToString(), UriKind.Relative)); } The Login.xaml file is in my root folder (right under Project). This navigation does not seem to work! The exception I get reads like so: Navigation is only supported to relative URIs that are fragments, or begin with '/', or which contain ';component/'. Parameter name: uri The Login page does not load. There is no problem with Login.xaml as when I set this.RootVisual = new Login(); the page loads just fine. I also tried setting the NavigateUri attribute of the HyperlinkButton to "Login." No cigar. I'll appreciate any help! Thanks a lot in advance

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• How to register assemblies using Windsor in ASP.NET MVC

  - by oz

  This is how my project looks: TestMvc (my web project) has a reference to the DomainModel.Core assembly where my interfaces and business objects reside. The class that implements the interfaces in DomainModel.Core is in a different assembly called DomainModel.SqlRepository; the reason behind it is that if I just want to create a repository for Oracle I just have to deploy the new dll, change the web.config and be done with it. When I build the solution, if I look at the \bin folder of my TestMvc project, there is no reference to the DomainModel.SqlRepository, which makes sense because it's not being reference anywhere. Problem arises when my windsor controller factory tries to resolve that assembly, since it's not on the \bin directory. So is there a way to point windsor to a specific location, without adding a reference to that assembly? My web.config looks like this: <component id="UserService" service="TestMvc.DomainModel.Core.Interface, TestMvc.DomainModel.Core" type="TestMvc.DomainModel.SqlRepository.Class, TestMvc.DomainModel.SqlRepository" lifestyle="PerWebRequest" /> There's many ways around this, like copying the dll as part of the build, add the reference to the project so it will get copied to the \bin folder or install it on the GAC and add an assembly reference in the web.config. I guess my question is specific to Windsor, to see if I can give the location of my assembly and it will resolve it.

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• Data sharing amongst JPA Entities

  - by Nick

  Setup: I have a simple web app that has a handfull of forms, each on a separate page. These forms represent patient data. There is a one-to-one relationship between patient and all these forms/entities. Each form maps directly to a db table and a JPA entity, maybe not the best architecture but it works and is simple. Question: If form/entity A and form/entity B share a common chunk of data (one of more fields), what is the best way to handle that in JPA. I.E. - If the data gets inserted via form A, I need it to show up in form B as existing data and vice versa. In other words its logical for both entities to contain that data. I believe I will have to move the common data into its own entity and define the relationships that way, but I have tried many different ways and none gets me all the way, at least with basic JPA. Can this be done through pure JPA relationships or will I have to write a bunch of code to make this happen manually. Not looking for code specifically, just the correct way to model this data. Thanks.

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• IIS, Web services, Time out error

  - by Eduard

  Hello, We’ve got problem with ASP.NET web application that uses web services of other system. I’ll describe our system architecture: we have web application and Windows services that uses the same web services. - Windows service works all the time and sends information to these web services once an hour. - Web application is designed for users to send the same information in manual behavior. The problem is when user sometimes tries to send information in manual behavior in the web application, .NET throws exception „The operation has timed out” (web?). At that time Windows service successfully sends all necessary information to these web services. IT stuff that supports these web services asserts that there was no any request from our web application at that time. Then we have restarted IIS (iisreset) and everything has started to work fine. This situation repeats all the time. There is no anti-virus or firewall on the server. My suggestion is that there is something wrong with IIS, patches, configuration or whatever? The only specific thing is that there are requests that can least 2 minutes (web service response wait time). We tried to reproduce this situation on our local test servers, but everything works fine. OS: Windows Server 2003 R2 .NET: 3.5

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• By using " editingStyleForRowAtIndexPath " method , " didSelectRowAtIndexPath " method is not calle

  - by Madan Mohan

  Hi, the delegate method not called -(void)viewWillAppear:(BOOL)animated { [theTableView setEditing:TRUE animated:TRUE]; } -(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath { return UITableViewCellEditingStyleDelete; } by calling the above the methods i will get minus component before each cell in table view. But the below method didSelectRowAtIndexPath is not called and disclouser indicator is not in visible. (void )tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [theTableView deselectRowAtIndexPath:indexPath animated:YES]; ContactEditViewCotroller *contactEditViewCotroller=[[ContactEditViewCotroller alloc]init]; contactEditViewCotroller.isEdit=isEdit; if(isEdit == YES) { for(int i=0; i<=[editObject.contactList count]-1;i++) { if(indexPath.section == i) { appDelegate.isAddInEdit=NO; editcontacts = [editObject.contactList objectAtIndex:i]; contactEditViewCotroller.editcontacts=editcontacts; indexRow=i; } } } else { for(int i=0; i<=[addContactList count]-1;i++) { if(indexPath.section == i) { appDelegate.isAddInEdit=NO; Contacts *obj = [addContactList objectAtIndex:i]; contactEditViewCotroller.addcontacts=obj; } } } [[self navigationController] pushViewController:contactEditViewCotroller animated:YES]; [contactEditViewCotroller release]; }

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