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• Quartz in Webapplication

  - by JKV

  I have a question in scheduling jobs in web application. If we have to schedule jobs in web application we can either use java util Timer/TimerTask or Quartz(there are also other scheduling mechanism, but I considered Quartz). I was considering which one to use, when i hit the site http://oreilly.com/pub/a/java/archive/quartz.html?page=1 which says using timer has a bad effect as it creates a thread that is out of containers control in the last line. The other pages discuss Quartz and its capabilities, but I can read that Quartz also uses thread and/or threadpool to schedule tasks. My guess is that these threads are also not under the containers control Can anybody clarify this to me Is it safe to use Quartz in my web applications without creating hanging threads or thread locking issues? Thanks in advance

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• C#, WinForms: Why aren't KeyDown events chaining up to Form? I have to add event handler to each chi

  - by blak3r

  As i understand it, when a button is pressed it should first invoke the Control which has focus' KeyDown Handler, then it call the KeyDown handler for any Parent controls, all the way up to the main form. The only thing that would stop the chain would be if somewhere along the chain one of the EventHandlers did: e.SuppressKeyPress = true; e.Handled = true; In my case, KeyDown events never get to the main form. I have Form - Panel - button for example. Panel doesn't offer a KeyDown Event, but it shouldn't stop it from reaching the main form right? Right now as a work around I set every single control to call an event handler I wrote. I'm basically trying to prevent Alt-F4 from closing the application and instead minimize it.

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• Building Visual studio like application, need inputs..

  - by akjoshi

  Hi, I am working on a Visual studio like application i.e. hava a tolbox, an editor and property grid similar to VS. ser can drag and drop the controls(custom and third party) to the editor window and perform operations like resize, move, align, group etc.; Properties of that control needs to be displayed in property grid and user can update them from there. As per my current understanding I will have to extend the Canvas to create my own editor and and Interface for controls which it supports; Each supported control will have to implemnt this interface so that it can be placed in our editor. Something similar to this - http://www.codeproject.com/KB/WPF/WPFDiagramDesigner_Part4.aspx Looking forward for any kind of help, comment or links.

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• What is Silverlight's relationship -- if any -- to WPF?

  - by xarzu

  I was working with a WPF application and I decided that the controls and graphics I wanted to display on the grid might look better if it was a silverlight component. I thought this way because of all the cool silverlight controls that look very flash-like. But now that I have gottem my Visual Studio 2010 set up with SIlverlight, it seems that every silverlight app I can make are ASP.NET in nature. It seems that instead of a cool GUI control to make, Silverlight is telling me that it is primarely a dataflow sort of application for the web. What is the relationship, if any, between WPF and Silverlight. Can I or can I not put a silverlight control into my existing WPF application?

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• Fix Google Reader Lag by Blocking Google Plus Button

  - by Jason Fitzpatrick

  Chrome: Many Google Reader fans have noticed, since the upgrades last month, that the service is unbearably slow. Speed things up by blocking the Google Plus button. Ever since the upgrade from the old Google Reader interface to the new integrated-with-Google-Plus interface, many Google Reader users were reporting a painfully long lag between reading entries in Reader. Previously hitting a keyboard shortcut or arrow button to move you through the new stories was instant with no noticeable lag. After the upgrade a lag of 3-5 seconds per individual story became common (we experienced this annoying lag around the How-To Geek office immediately after the upgrade). One of the theories was that the addition of the Google Plus button to every article was causing memory issues. Geeks Are Sexy tested the theory by blocking this address: plusone.google.com/u/0/_/+1/fastbutton using AdBlock. While people were reporting great success with that move (and you may find it works great too) we didn’t have any luck. What did work for us was installing Chromeblock and, while visiting reader.google.com, clicking on the ChromeBlock toolbar button and blocking Google +1. After that the 3-5 second lag vanished and browsing articles was as snappy as it had been. Hit up the link below to grab a copy of Chromeblock. Amazon’s New Kindle Fire Tablet: the How-To Geek Review HTG Explains: How Hackers Take Over Web Sites with SQL Injection / DDoS Use Your Android Phone to Comparison Shop: 4 Scanner Apps Reviewed

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• How do i get an MKAnnotationView's coords?

  - by tarnfeld

  I have a method like this: - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control Using this, can i get the coordinates?

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• Passing parameters to a flash movie inserted in a VB program

  - by Michael

  Hi! I need to insert a Flash movie in a Visual Basic 2008 express form and send parameters to the movie, but am a newbie to VB. The flash movie will plot points sent by VB in a graph. I tried to insert the Shockwave Flash control in the form but cannot find it anywhere. So I inserted the webbrowser control, which I understand can be used to a similar purpose. But how would I send the values of X and Y (coordinates to plot in Flash) to the flash swf? Thanks for any help!

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• "Invalid Postback or callback argument" on modifying the DropDownList on the client side

  - by gnomixa

  I know why it's happening and i turned the validation on the page level, but is there a way to turn it off on the control level? "Invalid Postback or callback argument . Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %in a page. For security purposes, this feature verifies that arguments to Postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the Postback or callback data for validation."

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• Ellipse Drawing WPF Animation

  - by widmayer

  I am developing a control that is a rectangle area and will draw an ellipse in the rectangle area when a trigger occurs. This control will be able to host other controls like, textbox's, buttons, etc. so the circle will be drawn around them when triggered. I want the circle being drawn as an animation like you were circling the inner controls with a pen. My question is whats the best way to accomplish this. I've been doing some research and I could use WPF animation or I could use GDI+ to accomplish the tasks. I am new to WPF animation so that is why I am asking the question.

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• Improving SpriteBatch performance for tiles

  - by Richard Rast

  I realize this is a variation on what has got to be a common question, but after reading several (good answers) I'm no closer to a solution here. So here's my situation: I'm making a 2D game which has (among some other things) a tiled world, and so, drawing this world implies drawing a jillion tiles each frame (depending on resolution: it's roughly a 64x32 tile with some transparency). Now I want the user to be able to maximize the game (or fullscreen mode, actually, as its a bit more efficient) and instead of scaling textures (bleagh) this will just allow lots and lots of tiles to be shown at once. Which is great! But it turns out this makes upward of 2000 tiles on the screen each time, and this is framerate-limiting (I've commented out enough other parts of the game to make sure this is the bottleneck). It gets worse if I use multiple source rectangles on the same texture (I use a tilesheet; I believe changing textures entirely makes things worse), or if you tint the tiles, or whatever. So, the general question is this: What are some general methods for improving the drawing of thousands of repetitive sprites? Answers pertaining to XNA's SpriteBatch would be helpful but I'm equally happy with general theory. Also, any tricks pertaining to this situation in particular (drawing a tiled world efficiently) are also welcome. I really do want to draw all of them, though, and I need the SpriteMode.BackToFront to be active, because

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• PowerBuilder Indeterminate Progress Bar

  - by Adam Hawkes

  I have a somewhat-long-running stored procedure being called from a PB application. I want the UI to show an indicator that it is processing, but I don't know the exact progress. That is, I can't say whether it is 10% or 90% done. All I know is when it is done. To give the user something to look at I'd like to put a "Inderterminate" (horizontal) progress bar on the window somewhere. I've looked at the documentation for the built-in HProgressBar control and don't see how to force this behavior. Short of writing my own control or importing another one, is there a way to accomplish this?

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• Annotate source code with diagrams as comments

  - by Steven Lu

  I write a lot of (primarily c++ and javascript) code that touches upon computational geometry and graphics and those kinds of topics, so I have found that visual diagrams have been an indispensable part of the process of solving problems. I have determined just now that "oh, wouldn't it just be fantastic if I could somehow attach a hand-drawn diagram to a piece of code as a comment", and this would allow me to come back to something I worked on, days, weeks, months earlier and far more quickly re-grok my algorithms. As a visual learner, I feel like this has the potential to improve my productivity with almost every type of programming because simple diagrams can help with understanding and reasoning about any type of non-trivial data structure. Graphs for example. During graph theory class at university I had only ever been able to truly comprehend the graph relationships that I could actually draw diagrammatical representations of. So... No IDE to my knowledge lets you save a picture as a comment to code. My thinking was that I or someone else could come up with some reasonably easy-to-use tool that can convert an image into a base64 binary string which I can then insert into my code. If the conversion/insertion process can be streamlined enough it would allow a far better connection between the diagram and the actual code, so I no longer need to chronographically search through my notebooks. Even more awesome: plugins for the IDEs to automatically parse out and display the image. There is absolutely nothing difficult about this from a theoretical point of view. My guess is that it would take some extra time for me to actually figure out how to extend my favorite IDEs and maintain these plugins, so I'd be totally happy with a sort of code post-processor which would do the same parsing out and rendering of the images and show them side by side with the code, inside of a browser or something. Since I'm a javascript programmer by trade. What do people think? Would anyone pay for this? I would.

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• ASP.NET mvc on mono 2.2

  - by Markus

  Hi, I am having a trouble. I am trying to run asp.net mvc 1.0 on mono 2.2.I have copied the system.web.mvc.dll to bin directory. I have done HttpContext.Current.RewritePath("/Home/Index");. Still I am having te error: Server Error in '/' Application The incoming request does not match any route Description: HTTP 500. Error processing request. Stack Trace: System.Web.HttpException: The incoming request does not match any route at System.Web.Routing.UrlRoutingHandler.ProcessRequest (System.Web.HttpContextBase httpContext) [0x00000] at System.Web.Routing.UrlRoutingHandler.ProcessRequest (System.Web.HttpContext httpContext) [0x00000] at System.Web.Routing.UrlRoutingHandler.System.Web.IHttpHandler.ProcessRequest (System.Web.HttpContext context) [0x00000] at MvcApplication4._Default.Page_Load (System.Object sender, System.EventArgs e) [0x00000] at System.Web.UI.Control.OnLoad (System.EventArgs e) [0x00000] at System.Web.UI.Control.LoadRecursive () [0x00000] at System.Web.UI.Page.ProcessLoad () [0x00000] at System.Web.UI.Page.ProcessPostData () [0x00000] at System.Web.UI.Page.InternalProcessRequest () [0x00000] at System.Web.UI.Page.ProcessRequest (System.Web.HttpContext context) [0x00000] Version information: Mono Version: 2.0.50727.1433; ASP.NET Version: 2.0.50727.1433

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• How Gridview co-operates with ObjectDataSource?

  - by sanjuro

  Hi, how Gridview co-operates with ObjectDataSource internally? When you set DataSourceID of GridView, assigned ObjectDataSource take care of such things as paging and sorting, but i don't have full control above databinding itself, on the other side when i set datasource of gridview in code-behind: protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { testGridView.DataSource = testObjectDataSource.Select(); testGridView.DataBind(); } } Now i have full control, but i have lost the advantage of comfort sorting and paging. And that co-operation between ObjectDataSource and Gridview became mystery for me. So can anybody explain me in details how ObjectDataSource and Gridview co-operates under the hood? I want to understand it in order to write my own smart code or own gridview that will mimic this co-operation. Many thanks for answers.

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• Microsoft Team Foundation Equivalent stack.

  - by Nix

  I am looking for a free alternative to TFS. What would be the best alternative stack(source control, bug tracking, project management/planning, wiki, automated builds (ci))? Keeping in mind that it would be nice if they all integrated well. For example, it would be nice to be able to link bugs to source control, and then be able to link to a project plan and then be able to automate building. I do not have issues with using Microsoft project to manage project planing. I know i would like to use these....: SVN TeamCity NUnit But i am struggling to find a good Wiki/Project Planning/Bug tracking, that would integrate well. Any questions let me know.

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• Can a ScatterViewItem dynamically resize to fit its content?

  - by Brett

  We're hosting a control inside of a ScatterViewItem that dynamically changes its size at runtime as a result of having various sub-elements added, removed, and/or collapsed. We would like to have the hosting ScatterViewItem resize as well to properly fit its child controls, but we're having a hard time making this happen. We've tried a number of different things and the closest we've come is hooking into the child control's SizeChanged event and explicitly setting the ScatterViewItem's Width and Height, but this approach still has issues. When you define a ScatterViewItem and its content in XAML, the ScatterViewItem is sized appropriately. We would like to force the same behavior at runtime when its content changes size. Any help would be greatly appreciated. Thanks!

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• how to invoke onclick function in html from vb.net or C#

  - by vbNewbie

  I am trying to invoke the onclick function in an html page that displays content. I am using the httpwebreqest control and not a browser control. I have traced the function and tried to find the link it calls but looking at the code below I tried inserting the link into the browser with the main url but it does not work. <div style="position:relative;" id="column_container"> <a href="#" onclick=" if (! loading_next_page) { loading_next_page = true; $('loading_recs_spinner').style.visibility = 'visible'; **new Ajax.Request('/recommendations?directory=non-profit&page=**' + next_page, { onComplete: function(transport) { if (200 == transport.status){ $('column_container').insert({ bottom: transport.responseText }); loading_next_page = false; $('loading_recs_spinner').style.visibility = 'hidden'; next_page += 1; if (transport.responseText.blank()) $('show_more_recs').hide(); } } }); } return false; Any ideas would be deeply appreciated.

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• links for 2011-02-28

  - by Bob Rhubart

  Apache Tuscany : SCA Java 2.x Releases (tags: ping.fm) Richard Veryard on Architecture: Modernism and Enterprise Architecture "Underlying conventional enterprise architecture theory and practice are some implicit assumptions that could be loosely characterized as modernist. Several people are offering more or less radical departures from conventional enterprise architecture..." - Richard Veryard (tags: ping.fm entarch) Java / Oracle SOA blog: Building an asynchronous web service with OSB "A few weeks ago I made a blogpost over how you can build an asynchronous web service with JAX-WS. In this blogpost I will do the same in the Oracle Service Bus." - Oracle ACE Edwin Biemond (tags: oracle otn oracleace servicebus esb osb webservices soa) Enterprise Software Development with Java: GlassFish 3.1 arrived! Yes sir, we do cluster now! "GlassFish 3.1 is finally there. As promised by Oracle back in March last year! And it is an exciting release. It brings back all the clustering and high availability support we were missing since 2.x into the Java EE 6 world." - Oracle ACE Director Markus Eisele (tags: oracle otn oracleace glassfish)

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• What's the thought behind Children and Controls properties in WPF?

  - by Mathias Lykkegaard Lorenzen

  I don't know if this should go on Programmers, but I thought it was relevant here. Being a skilled WPF programmer myself, I often wonder what people were thinking when they designed WPF in terms of naming conventions. Why would you sometimes have a property called Children for accessing the children of the control, and then sometimes have an equivalent property, just called Controls instead? What were they thinking here? Another example is the Popup control. Instead of a Content property, it has a Child property. Why would you do that? To me that's just confusing. So I'm wondering if there's a logical reason for it, which would probably also help me understand what the properties are called next time I need to do some speed-programming. If there's no reason behind it, then all I can say is WAT.

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• Django vs. Pylons

  - by Kenneth Reitz

  I've recently become a little frustrated with Django as a whole. It seems like I can't get full control over anything. I love Python to death, but I want to be able (and free) to do something as simple as adding a css class to an auto-generated form. One MVC framework that I have really been enjoying working with is Grails (groovy). It has a FANTASTIC templating system and it lets you really have full control as you'd like. However, I am beyond obsessed with Python. So I'd like to find something decent and powerful written in it for my web application development. Any suggestions? Pylons maybe?

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• How to work-around "Object required" error when adding a variable in an ATL Dialog

  - by Toto

  I'm using Visual Studio .NET 2003 to develop a COM ATL application in unmanaged Visual C++. I've created a ATL Dialag and whenever I try to add a variable for a control the wizard thorws the message "Object required". I've tried the following alternatives: Right click in the control to call "Add variable" from there: this way the wizard does not thorws the message but the variable is not created. This post, but it is for VS2005. Does anyone knows any work-around-around for this problem? Or what the wizard actually does so I can do it manually?

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• ASP.NET AJAX UpdatePanel problem

  - by Velika

  I'll try and be concise: 1) I have a dropdownlist with Autopostback set to TRUE 2) I have an UpdatePanel that contains a Label. 3) When the downdownlist selection is changed, I want to update the label. Problem: Focus is lost on the dropdownlist, forcing the user to click on the dropdownlist to reset focus back to the control. My "solution": In the DropDownList_SelectionChanged event, set focus back to the drop down list: dropdownlist1.focus() Problem: While this works great in IE, Firefox and Chrome change the scroll position such that the control which was assigned focus is positioned at the bottom on the visible portion of the browser window. This is often a very disorientating side effect. How can this be avoided so it works in FF as it does in IE?

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• How do I specify table data only for the current user's ID (VWD asp.net 3.5) ?

  - by Greg McNulty

  I'm using the Details View control of VWD asp.net 2008 I have a users database table and one of the columns contain the "unique" user's profile ID, created by VWD from the automatic profiles table. From my table, I would like to select only the data pertaining to the logged in user. How do I get the current unique user profileID and then have that used for the query? What I have so far: In the configure data source option of the control I select the columns I would like to display, select the check box for "Return Only Unique IDs" and the WHERE option. In this new window I select the Column to the profile userID ... "=" and then assumed I should select Source: "Profile". Now what should the parameter properties or value be to select only the logged userID specific data of the table? Any help is appreciated. Thank You!

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• How to create breadcrumbs using Dynamic Data/LINQTOSQL framework?

  - by Chicago

  Hello, I need some EXAMPLES or IDEAS on how to created dynamic breadcrumb control which will dynamically generated breadcrumbs for Dynamic Date framework powered by LINQTOSQL

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• URL Routing with WebForms, what to do with additional querystrings like page number, filter, etc?

  - by Scott

  I am switching from Intelligencia's UrlRewriter to the new web forms routing in ASP.NET 4.0. I have it working great for basic pages, however, in my e-commerce site, when browsing category pages, I previously used querystrings that were built into my pager control to control paging. An old url (with UrlRewriting) would be: http://www.mysite.com/Category/Arts-and-Crafts_17 I have a MapPageRoute defined in global.asax as: routes.MapPageRoute("category-browse", "Category/{name}_{id}", ~/CategoryPage.aspx"); This works great. Now, somebody clicks to go to page 2. Previously I would have just tacked on ?page=2 as the querystring. Now, How do I handle this using web forms routing? I know I can do something like: http://www.mysite.com/Category/Arts-and-Crafts_17/page/2 But in addition to page, I can have filters, age ranges, gender, etc. Should I just keep defining routes that handle these variables, or should I continue using querystrings and can I define a route that allows me to use my querstrings like before?

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