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Articles indexed Tuesday April 20 2010

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  • Design Pattern for error handling in ASP.NET 3.5 site

    - by Kevin
    I am relatively new to ASP.NET programming, and web programming in general. We have a site we recently ported from .NET 1.1 to 3.5. Currently we have two methods of error handling: either catching the error during data load on a page and displaying the formatted error in a label on the page, or redirecting to a generic error page. Both of these are somewhat annoying, as right now I'm trying to redesign how our errors are displayed. We are soon moving to Master pages, and I'm wondering if there is a way to "build in" an error handling control. What I mean by this is using a ASP.NET user control I've designed that simply gets passed the error string returned from the server. If an error occurs, the page would not display the content, and instead display the error control. This provides us with the ability to retain the current banner/navigation during an error (which we don't get with the generic error page), as well as keeping me from having to add the control to every aspx page we have (which I have to do with using the label-per-page system). Does something like this make sense? Ultimately I just want to have the error control added to a single page, and all other pages have access to it directly. Is this something Master pages help with? Thanks!

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  • Change inline onclick to unobtrusive jquery

    - by Clint
    Hi, I need to target all links with a class of hslide and attach this to them. Any jquery guru's out there know how to do this? onclick="return hs.expand(this, { slideshowGroup: 'groupC0', wrapperClassName: 'rounded-white', outlineType : 'rounded-white', dimmingOpacity: 0.8, align : 'center', transitions : ['expand', 'crossfade'], fadeInOut: true });" Thanks, C

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  • UITableViewCells loaded from NIB always nil

    - by Jason B
    I'm trying to create a simple form using a UITableViewController as documented in the Apple Developer Documentation here: http://developer.apple.com/iphone/library/documentation/UserExperience/Conceptual/TableView_iPhone/TableViewCells/TableViewCells.html What I'm trying to do is located in the section entitled: "The Technique for Static Row Content" I've created a couple of UITableViewCells and added them to my nib, but when I try and access them to add them to the UITableView (in the cellForRowAtIndexPath method) they are always null. It's like they are not being properly loaded from the nib. I've double/triple/quadruple checked my code to make sure I'm doing it exactly as detailed in the docs, but no luck. Is there something obvious I'm missing here? Thanks

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  • Do I need Response.End() in ASP.Net 2.0

    - by Hamish Grubijan
    Hi, I am just starting with ASP.Net. I copied a ex-co-worker's code (from .Net 1.1 era) and it has a Response.End(); in case of an error. There is also a: catch (Exception ex) { Response.Write(ex.Message); Response.End(); } at the end of Page_Load(object sender, System.EventArgs e) which always appends "Thread was aborted." or something like that at the end. I suspect that this worked differently before, or the error conditions were not tested very well. Anyhow, I was able to stop using Response.End(); in case when I do not like the GET parameters, and use return; instead. It seemed to do the right think in a simple case. Is this Ok in general? There are some problems with the code I copied, but I do not want to do a rewrite; I just want to get it running first and find wrinkles later. The Response.End(); caused a mental block for me, however, so I want to figure it out. I want to keep the catch all clause just in case, at least for now. I could also end the method with: catch (System.Threading.ThreadAbortException) { Response.End(); } catch (Exception ex) { Response.Write(ex.Message); Response.End(); } but that just seems extremely stupid, once you think about all of the exceptions being generated. Please give me a few words of wisdom. Feel free to ask if something is not clear. Thanks! P.S. Ex-coworker was not fired and is a good coder - one more reason to reuse his example.

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  • What are Collaboration Data Objects (CDO)?

    - by Pranav
    Collaboration Data Objects or CDO, is a component that enables messaging between applications. It's something like the MFC we have in VC++ that enables us to prefer a simpler interface compared to the WIN32 API which, as an interface, still requires lots of escalation work by developers (yet very robust!). CDO is primarily built to simply the creations of messaging applications and we should keep in mind that CDO is NOT a new messaging model but is BUILT ON the MAPI architecture. It is just an extended interface that collaborates with MAPI and simplifies the programming task at hand for creation of messaging applications. CDO replaced Microsoft's earlier Active Messaging. CDO 1.2 enables us to play around with Data, send, receive emails and a host of other functions like rendering in exchange functionalities into HTML and do loads of other stuff. If you've got some firsthand experiences, a couple of tips will be great and will defiantly further my knowledge base in this area and hopefully get me a more refined understanding. Some pointers on MAPI will be pretty cool.

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  • removing specific warnings in Apache error.log

    - by Tereno
    Here's my situation. I have a directive that goes something like this: Options MultiViews FollowSymLinks I have a location directive where I have Options +Includes This causes warning errors in my Apache error log: mod_include: Options +Includes (or IncludesNoExec) wasn't set, INCLUDES filter removed These warnings are gone when I add +Includes to my options but I don't want. I want to have the Includes filter removed but without having warning errors. If there's something unclear, feel free to ask. Thanks

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  • How to manage sub-domains on WinHost with IIS7 URL Rewrite 2.0?

    - by jrummell
    I'm trying out WinHost and I'm running into some issues with sub-domains. On WinHost, you can have multiple sub-domains per hosting account, but each sub-domain points to the root website. E.g. you can have www.example.com, sub1.example.com, and sub2.example.com but all of them display the content at http://www.example.com/. Other Hosts allow you to point sub-domains to a sub folder in your website. This would allow you to point sub1.example.com to /sub1, sub2.example.com to /sub2 and www.example.com to /. WinHost recommends using an asp/aspx page to redirect http://sub1.example.com to http://sub1.example.com/sub1, which points to /sub1. While that would work, I'd like to not have the subdomain in the url twice. So I tried using IIS7 URL Rewrite to point http://sub1.example.com to /sub1. Ben Powell describes this in detail on his blog. This is great, except Request.ApplicationPath is now /sub1/path/to/current/page.aspx, which breaks ASP.Net Themes (and probably other stuff too). What can I do to fix the ApplicationPath? Is there a better way to accomplish this?

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  • Réseau social : Affichez votre badge Developpez associé à votre profil sur vos sites, Blogs, réseaux

    Chers membres du club, Aujourd'hui nous vous proposons de créer un badge associé à votre profil d'utilisateur du forum. Vous pourrez simplement diffuser votre profil sur votre site internet, votre blog ou sur tout autre site. Voilà de quoi créer votre propre identité Developpez et de la faire connaître Ce badge existe en 2 versions : * une version "web", utilisable en copier-collant un petit bout de code html à l'endroit souhaité * une version "image", utilisable partout sur internet Voici le rendu de la version image pour mon propre profil : [IMG]http://www.developpez.com/ws/badgeimg?user=29897[/IMG] Notr...

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  • Java- Copy file to either new file or existing file.

    - by jared
    Hi- I would like to write a function copy(File f1, File f2) f1 is always a file. f2 is either a file or a directory. If f2 is a directory I would like to copy f1 to this directory (the file name should stay the same). If f2 is a file I would like to copy the contents of f1 to the end of the file f2. So for example if F2 has the contents: 2222222222222 And F1 has the contents 1111111111111 And I do copy(f1,f2) then f2 should become 2222222222222 1111111111111 Thanks!

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  • In an If-Else Statement for a method return, should an Else be explicitly stated if it can instead b

    - by ccomet
    I have a method that checks certain things and returns a Boolean based on those checks. It involves a single branching If section that checks about 5 conditions in sequence. If any of those conditions return true, then the method will return true;. If none of the conditions return true, then the method will return false;. Since the code after the If section will only run if none of the conditions are true, then that code is logically identical to including an actual Else statement. So is it a better idea to actually write in the Else statement for this kind of situation?

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  • quartz: preventing concurrent instances of a job in jobs.xml

    - by Jason S
    This should be really easy. I'm using Quartz running under Apache Tomcat 6.0.18, and I have a jobs.xml file which sets up my scheduled job that runs every minute. What I would like to do, is if the job is still running when the next trigger time rolls around, I don't want to start a new job, so I can let the old instance complete. Is there a way to specify this in jobs.xml (prevent concurrent instances)? If not, is there a way I can share access to an in-memory singleton within my application's Job implementation (is this through the JobExecutionContext?) so I can handle the concurrency myself? (and detect if a previous instance is running) update: After floundering around in the docs, here's a couple of approaches I am considering, but either don't know how to get them to work, or there are problems. Use StatefulJob. This prevents concurrent access... but I'm not sure what other side-effects would occur if I use it, also I want to avoid the following situation: Suppose trigger times would be every minute, i.e. trigger#0 = at time 0, trigger #1 = 60000msec, #2 = 120000, #3 = 180000, etc. and the trigger#0 at time 0 fires my job which takes 130000msec. With a plain Job, this would execute triggers #1 and #2 while job trigger #0 is still running. With a StatefulJob, this would execute triggers #1 and #2 in order, immediately after #0 finishes at 130000. I don't want that, I want #1 and #2 not to run and the next trigger that runs a job should take place at #3 (180000msec). So I still have to do something else with StatefulJob to get it to work the way I want, so I don't see much of an advantage to using it. Use a TriggerListener to return true from vetoJobExecution(). Although implementing the interface seems straightforward, I have to figure out how to setup one instance of a TriggerListener declaratively. Can't find the docs for the xml file. Use a static shared thread-safe object (e.g. a semaphore or whatever) owned by my class that implements Job. I don't like the idea of using singletons via the static keyword under Tomcat/Quartz, not sure if there are side effects. Also I really don't want them to be true singletons, just something that is associated with a particular job definition. Implement my own Trigger which extends SimpleTrigger and contains shared state that could run its own TriggerListener. Again, I don't know how to setup the XML file to use this trigger rather than the standard <trigger><simple>...</simple></trigger>.

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  • How does one implement a truly asynchronous java thread

    - by Ritesh M Nayak
    I have a function that needs to perfom two operations, one which finishes fast and one which takes a long time to run. I want to be able to delegate the long running operation to a thread and I dont care when the thread finishes, but the threads needs to complete. I implemented this as shown below , but, my secondoperation never gets done as the function exits after the start() call. How I can ensure that the function returns but the second operation thread finishes its execution as well and is not dependent on the parent thread ? public void someFunction(String data) { smallOperation() Blah a = new Blah(); Thread th = new Thread(a); th.Start(); } class SecondOperation implements Runnable { public void run(){ // doSomething long running } }

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  • '--' is an unexpected token. The expected token is '>'. Line 81, position 5.

    - by vamsivanka
    I am trying to get the html for this link http://slashdot.org/firehose.pl?op=rss&content_type=rss&orderby=createtime&fhfilter="home:vamsivanka" Dim myRequest As WebRequest Dim myResponse As WebResponse Try myRequest = System.Net.WebRequest.Create(url) myRequest.Timeout = 10000 myResponse = myRequest.GetResponse() Dim rssStream As Stream = myResponse.GetResponseStream() Dim rssDoc As New XmlDocument() rssDoc.Load(rssStream) Catch ex As Exception End Try But the rssDoc.Load is giving me an error '--' is an unexpected token. The expected token is ''. Line 81, position 5. Please Let me know your suggestions.

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  • ASP MVC add textboxes with jquery

    - by Jacob Huggart
    I am new to jQuery, but I would like to have a button that when clicked will add more textboxes to a page. I have three textboxes that contain data of the same type and if the user has more data of the same type to enter, I would like to pop up three more textboxes. What would be the best way to go about that?

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  • Representing element as boolean with JAXB?

    - by Marcus
    We have this XML: <Summary> <ValueA>xxx</ValueA> <ValueB/> </Summary> <ValueB/> will never have any attributes or inner elements. It's a boolean type element - it exists (true) or it doesn't (false). JAXB generated a Summary class with a String valueA member, which is good. But for ValueB, JAXB generated a ValueB inner class and a corresponding member: @XmlElement(name = "ValueB") protected Summary.ValueB valueB; But what I'd like is a boolean member and no inner class: @XmlElement(name = "ValueB") protected boolean valueB; How can you do this? I'm not looking to regenerate the classes, I'd like to just make the code change manually. Update: In line with the accepted answer, we created a new method returning the boolean value conditional on whether valueB == null. As we are using Hibernate, we annotated valueB with @Transient and annotated the boolean getter with Hibernate's @Column annotation.

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  • Pulling info from database and dynamically adding them into different divs

    - by Matt Nathanson
    This may be a bit of a php n00b question but i've managed to get it working this far and I'm a little bit stuck. I'm pulling 12 images with descriptions out of a database. I want to insert them into a client rotator that has 3 sets of 4. They will be contained in divs called clientrotate1, clientrotate2, and clientrotate3 respectively. Inside each of those divs I want to have 4 images with classes thumb1, thumb2, thumb3, and thumb4 I am successful in having the images and descriptions pull into clientrotator 1. Where I get stuck is to how to dynamically add the 2nd and 3rd set of data into clientrotator2 and clientrotator3. Here is my function: public function DisplayClientRotator(){ $result = mysql_query( 'SELECT * FROM project ORDER BY id DESC LIMIT 12' ) or die("SELECT Error: ".mysql_error()); $iterator = 1; while ($row = mysql_fetch_assoc($result)) { echo "<div id='clientrotate1'>"; echo "<div class='thumb$iterator'>"; echo "<img style='width: 172px; height: 100px;' src=".$row['photo']." />"; echo "<div class='transbox'>"; echo "<div class='thumbtext'>"; echo $row['campaign']; echo "</div>"; echo "</div>"; echo "</div>"; echo "</div>"; $iterator++; } Any help or pointers int he right direction would be greatly appreciated! Thanks so much, Matt

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  • Unable to output formatted HTML from Jquery with html DataType

    - by Dkong
    I am calling some data which has pre-formatted HTML code in it, but when it renders from the jquery it appears to ignore my markup. This is my jQuery: function GetFeed(){ document.getElementById("marq").innerHTML = ''; $.ajax({ type: "POST", url: "xmlproxy.ashx", dataType: "html", success: function(obj) { $('<span class="tickerItem"></span>').html(obj).appendTo('#marq'); } }); }

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  • Naming convention for utility classes in Java

    - by Zarjay
    When writing utility classes in Java, what are some good guidelines to follow? Should packges be "util" or "utils"? Is it ClassUtil or ClassUtils? When is a class a "Helper" or a "Utility"? Utility or Utilities? Or do you use a mixture of them? The standard Java library uses both Utils and Utilities: javax.swing.Utilities javax.print.attribute.AttributeSetUtilities javax.swing.plaf.basic.BasicGraphicsUtils Apache uses a variety of Util and Utils, although mostly Utils: org.apache.commons.modeler.util.DomUtil org.apache.commons.modeler.util.IntrospectionUtils org.apache.commons.io.FileSystemUtils org.apache.lucene.wordnet.AnalyzerUtil org.apache.lucene.util.ArrayUtil org.apache.lucene.xmlparser.DOMUtils Spring uses a lot of Helper and Utils classes: org.springframework.web.util.UrlPathHelper org.springframework.core.ReflectiveVisitorHelper org.springframework.core.NestedExceptionUtils org.springframework.util.NumberUtils So, how do you name your utility classes?

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  • How can I find the columns of a disabled index constraint?

    - by thecoop
    For a normal index constraint, you can find the columns it is on by querying the all_ind_columns sysview using the index name in all_constraints. But if the constraint is disabled, no index exists, and there doesn't seem to be anywhere else that has constraint column information. How can I get the columns of a disabled index constraint from the data dictionary (without re-enabling the constraint)?

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