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  • Unable to free space in /boot

    - by wadesworld
    Running: Linux ips-svf-1 3.0.0-22-server #36-Ubuntu SMP Tue Jun 12 17:56:20 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux I'm trying to free space in /boot with apt-get -y purge, but every time I run the command I get an error about unmet dependencies: sudo apt-get -y purge linux-headers-3.0.0-12 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: linux-headers-3.0.0-12-server : Depends: linux-headers-3.0.0-12 but it is not going to be installed linux-image-server : Depends: linux-image-3.0.0-26-server but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). However, I can't run apt-get -f install since /boot is full. I also tried running dpkg --purge and dpkg --remove manually, but both give the same unmet dependency error. Any suggestions on how I can successfully free space in /boot? Is there anything I can delete with rm?

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  • Displaying a Grid of Data in ASP.NET MVC

    One of the most common tasks we face as a web developers is displaying data in a grid. In its simplest incarnation, a grid merely displays information about a set of records - the orders placed by a particular customer, perhaps; however, most grids offer features like sorting, paging, and filtering to present the data in a more useful and readable manner. In ASP.NET WebForms the GridView control offers a quick and easy way to display a set of records in a grid, and offers features like sorting, paging, editing, and deleting with just a little extra work. On page load, the GridView automatically renders as an HTML <table> element, freeing you from having to write any markup and letting you focus instead on retrieving and binding the data to display to the GridView. In an ASP.NET MVC application, however, developers are on the hook for generating the markup rendered by each view. This task can be a bit daunting for developers new to ASP.NET MVC, especially those who have a background in WebForms. This is the first in a series of articles that explore how to display grids in an ASP.NET MVC application. This installment starts with a walk through of creating the ASP.NET MVC application and data access code used throughout this series. Next, it shows how to display a set of records in a simple grid. Future installments examine how to create richer grids that include sorting, paging, filtering, and client-side enhancements. We'll also look at pre-built grid solutions, like the Grid component in the MvcContrib project and JavaScript-based grids like jqGrid. But first things first - let's create an ASP.NET MVC application and see how to display database records in a web page. Read on to learn more! Read More >

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  • Free Webinar: A faster, cheaper, better IT Department with Azure

    - by Herve Roggero
    Join me for a free Webinar on Wednesday October 17th at 1:30PM, Eastern Time. I will discuss the benefits of cloud computing with the Azure platform. There isn’t a company out there that would say “No” to reduced IT costs and unlimited scaling bandwidth. This webinar will focus on the specific benefits of the Microsoft Azure cloud platform and will convince you on the sound business rationale behind moving to the cloud. From Infrastructure as a Service (Iaas) to Platform as a Service (Paas), Azure supports quick deployments, virtual machines, native SQL Databases and much more. Topics that will be discussed: - Why use Azure for your Cloud Computing needs - Iaas and Paas Offerings - Differing project approaches to Cloud computing - How Azure’s agility and reduced costs lead to better solutions Attendees of this webinar will also be eligible to receive the following: Free Two Hour Consultation which can include: - Review of Your Cloud Strategy - Cloud Roadmap Review - Review of Data-mart strategies - Review of Mobility Strategies Click Here to Register Now. About Herve Roggero Hervé Roggero, Azure MVP, is the founder of Blue Syntax Consulting, a company specialized in cloud computing products and services. Hervé's experience includes software development, architecture, database administration and senior management with both global corporations and startup companies. Hervé holds multiple certifications, including an MCDBA, MCSE, MCSD. He also holds a Master's degree in Business Administration from Indiana University. Hervé is the co-author of "PRO SQL Azure" from Apress. For more information, visit www.bluesyntax.net.

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  • MammothVPS launches Backups, DNS Management and more!!!

    - by stefan.sedich
    Yesterday we launched a bunch of new features over at MammothVPS, - All VPS' now have an on-site, off-server backup facility available to them. By default all customers will have 1 free weekly backup made available to them, and should you wish to you can purchase more slots which are available in daily, weekly and monthly schedules. - DNS hosting has been made available and will be free for all customers. You can find the new interface in your mPanel. - A cleanup of the menu system has been done to make it easier to navigate around both the site and mPanel. - You will find new sections on site, we now have more information about our services and have included things like a Knowledge Base, which will provide information on howto setup various applications on your VPS. - Added the ability to change the kernel your VPS is running on. So head on over to MammothVPS and check it out.

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  • ASP.NET RedirectPermanent Method using C# and VB.NET

    301 redirection is essential for the best user experience. If something on your website has been changed or moved to a new permanent location, users will need to be permanently redirected. In addition, search engines can follow this type of redirection, and this redirected-to page will now be the one to rank in Google or other search engines, replacing the old page. There are different ways to implement the RedirectPermanent method. This tutorial will illustrate these common techniques with sample VB.NET or C# code. Creating the Sample ASP.NET 4.0 Website RedirectPermanent is new in ASP.NET 4....

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  • Coding an IQ Test with Conditionally Driven Event Handlers in ASP.NET 3.5

    This is the second part of a tutorial series on developing conditionally-driven event handlers in ASP.NET 3.5. In part one you started learning how to build an online IQ test with ASP.NET 3.5 the creation of web forms and setting of objectives were discussed. In this second part we ll really sink our teeth into using conditionally-driven event handlers to make the test work.... Business Productivity Online Suite From $10 per user per month. Includes a 12-month subscription. Min 5 seats.

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  • is Java free for mobile development?

    - by exTrace101
    Q1. I would like to know if it's free for a developer (I mean, if I have to pay no royalties to Sun/Oracle) to develop (Android) mobile apps in Java? After reading this snippet about use of Java field, I'm getting the impression that Java is not free for mobile development, is that right? .."General Purpose Desktop Computers and Servers" means computers, including desktop and laptop computers, or servers, used for general computing functions under end user control (such as but not specifically limited to email, general purpose Internet browsing, and office suite productivity tools). The use of Software in systems and solutions that provide dedicated functionality (other than as mentioned above) or designed for use in embedded or function-specific software applications, for example but not limited to: Software embedded in or bundled with industrial control systems, wireless mobile telephones, wireless handheld devices, netbooks, kiosks, TV/STB, Blu-ray Disc devices, telematics and network control switching equipment, printers and storage management systems, and other related systems are excluded from this definition and not licensed under this Agreement... and from http://www.excelsiorjet.com/embedded/ Notice : The Java SE Embedded technology license currently prohibits the use of Java SE in cell phones. Q2. how come these plethora of Android Java developers aren't paying Sun/Oracle a dime?

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  • JavaOne Content Available for Free

    - by Tori Wieldt
    JavaOne content is available in video in three sizes, depending on if you want to have a sip, have a drink, or go to the proverbial firehose. Tall (Keynote Highlights) Go to the JavaOne playlist on the YouTube Java channel for highlights of the JavaOne Keynotes.  Grande (Keynotes in Full) Go to the Oracle Media Network JavaOne 2012 channel to view the keynotes in full (Community Keynote coming soon). Venti (All Sessions, BOFs and Tutorials) To view slides paired with audio of each session, go to the JavaOne content catalog (JavaOne homepage, click on JavaOne Technical Sessions) and select a session. If a video is available, you'll see "Media" in the right column. Look under "Presentation Download" to get the slides. Sessions are being made available as quickly as possible. "It's exciting to see Oracle take community stewardship so seriously," said Sharat Chander, Group Director for Java Technology Outreach. "Making all JavaOne sessions on video available online for free will helps make the future Java for everyone." Thanks to Oracle for funding this and providing to it to the Java Community for free.

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  • btrfs and missing free space

    - by easteregg
    I converted my ext4 partition to btrfs and deleted the save subvolume after doing so. Then I enabled the compression (lzo) of the filessystem in the fstab file and everything is correct so far. Then I forced the compression of all files using the defragmentation command with the parameter -c that the new compression is applied to all files. While doing so, I noticed that my ssd got completly filled up - before I had 6gigs of free space. No I got nothing left. easteregg@x201s:~$ btrfs fi df / Data: total=50.00GB, used=49.17GB System: total=32.00MB, used=4.00KB Metadata: total=24.50GB, used=9.86GB and easteregg@x201s:~$ df -ha Filesystem Size Used Avail Use% Mounted on /dev/sda1 75G 60G 852M 99% / So now. How can I regain my free space. I expected to gain more space because of the lzo compression. And now! The fs is correctly mounted. easteregg@x201s:~$ mount /dev/sda1 on / type btrfs (rw,noatime,ssd,compress=lzo) Any ideas how to fix this issue?

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  • WAV and MP3 Streaming with ASP.Net and C#

    In this programming tutorial you will learn how to stream WAV and MP3 audio files in ASP.NET 3.5 using the C# server side language. This is particularly useful for music websites that are based on the ASP.NET 3.5 platform. The examples used in this article are tested to work on any major browser including Internet Explorer Chrome and Firefox. The scripts are tested on a Windows XP operating system using Visual Web Developer Express. For convenience an actual working example can be downloaded at the end of this tutorial. Finally this tutorial also highlights the use of the Google Flash player when streaming MP3s.... Autodesk? Inventor? Test Drive Autodesk? Inventor?. Download A Free 30-Day Trial Today.

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  • ASP.NET 3.5 Search Function Basic Development Concepts

    Adding a search web form to your ASP.NET website is very helpful for your users when they want to search related content. For example if you are going to display a very large table it would be much more efficient for users to search related content and display it back to the browser. This tutorial will show you how to develop a search function in ASP.NET 3.5 which you can add to your website.... AutoCAD LT? 2011 Trial Try The New AutoCAD LT? And Benefit From Consistent 2D Drafting Focus.

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  • Completing a Basic ASP.NET 3.5 User Input Validation Project

    You learned the basics and configuration steps of the most common types of validation web controls used in ASP.NET 3.5 in the first two parts of this tutorial series. In this last part you will learn how to integrate all of these validation web controls in a working ASP.NET project. You will also learn not only how to validate user input in the client side but also how to validate the page on the server side.... Microsoft SQL Server? Value Calculator Reduce Costs & Increase Value with Microsoft SQL Server? 2008. Download Today!

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  • Free memory outside function [migrated]

    - by Dev Bag
    Can you please help with this issue, is the below gonna leak memory or is it ok? and please let me know if there is something else that I need to pay attention to typedef struct { int len; UC * message; }pack; pack * prepare_packet_to_send(const int length,const unsigned char tag,const int numargs, ... ) { pack *layer= malloc(sizeof(pack)); va_list listp; va_start( listp, numargs ); int step = 0; layer->message = (unsigned char *) malloc(length); layer->len = length; int i = 0; int len = 0; unsigned char *source_message ; for( i = 0 ; i < numargs; i++ ) { source_message = va_arg( listp, unsigned char *); len = va_arg( listp, long); memcpy(layer->message+step, source_message, (long) len); step+=len; } va_end( listp ); return layer; } main() { pack *test = call prepare_packet_to_send(sizeof(var1)+sizeof(var2),any tag,any args) // are following two frees correct/enough? or is there something else i need to do to prevent mem leak? free(test->message); free(test); }

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  • Ajax Control Toolkit Now Supports jQuery

    - by Stephen.Walther
    I’m excited to announce the September 2013 release of the Ajax Control Toolkit, which now supports building new Ajax Control Toolkit controls with jQuery. You can download the latest release of the Ajax Control Toolkit from http://AjaxControlToolkit.CodePlex.com or you can install the Ajax Control Toolkit directly within Visual Studio by executing the following NuGet command: The New jQuery Extender Base Class This release of the Ajax Control Toolkit introduces a new jQueryExtender base class. This new base class enables you to create Ajax Control Toolkit controls with jQuery instead of the Microsoft Ajax Library. Currently, only one control in the Ajax Control Toolkit has been rewritten to use the new jQueryExtender base class (only one control has been jQueryized). The ToggleButton control is the first of the Ajax Control Toolkit controls to undergo this dramatic transformation. All of the other controls in the Ajax Control Toolkit are written using the Microsoft Ajax Library. We hope to gradually rewrite these controls as jQuery controls over time. You can view the new jQuery ToggleButton live at the Ajax Control Toolkit sample site: http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/ToggleButton/ToggleButton.aspx Why are we rewriting Ajax Control Toolkits with jQuery? There are very few developers actively working with the Microsoft Ajax Library while there are thousands of developers actively working with jQuery. Because we want talented developers in the community to continue to contribute to the Ajax Control Toolkit, and because almost all JavaScript developers are familiar with jQuery, it makes sense to support jQuery with the Ajax Control Toolkit. Also, we believe that the Ajax Control Toolkit is a great framework for Web Forms developers who want to build new ASP.NET controls that use JavaScript. The Ajax Control Toolkit has great features such as automatic bundling, minification, caching, and compression. We want to make it easy for ASP.NET developers to build new controls that take advantage of these features. Instantiating Controls with data-* Attributes We took advantage of the new JQueryExtender base class to change the way that Ajax Control Toolkit controls are instantiated. In the past, adding an Ajax Control Toolkit to a page resulted in inline JavaScript being injected into the page. For example, adding the ToggleButton control to a page injected the following HTML and script: <input id="ctl00_SampleContent_CheckBox1" name="ctl00$SampleContent$CheckBox1" type="checkbox" checked="checked" /> <script type="text/javascript"> //<![CDATA[ Sys.Application.add_init(function() { $create(Sys.Extended.UI.ToggleButtonBehavior, {"CheckedImageAlternateText":"Check", "CheckedImageUrl":"ToggleButton_Checked.gif", "ImageHeight":19, "ImageWidth":19, "UncheckedImageAlternateText":"UnCheck", "UncheckedImageUrl":"ToggleButton_Unchecked.gif", "id":"ctl00_SampleContent_ToggleButtonExtender1"}, null, null, $get("ctl00_SampleContent_CheckBox1")); }); //]]> </script> Notice the call to the JavaScript $create() method at the bottom of the page. When using the Microsoft Ajax Library, this call to the $create() method is necessary to create the Ajax Control Toolkit control. This inline script looks pretty ugly to a modern JavaScript developer. Inline script! Horrible! The jQuery version of the ToggleButton injects the following HTML and script into the page: <input id="ctl00_SampleContent_CheckBox1" name="ctl00$SampleContent$CheckBox1" type="checkbox" checked="checked" data-act-togglebuttonextender="imageWidth:19, imageHeight:19, uncheckedImageUrl:'ToggleButton_Unchecked.gif', checkedImageUrl:'ToggleButton_Checked.gif', uncheckedImageAlternateText:'I don&#39;t understand why you don&#39;t like ASP.NET', checkedImageAlternateText:'It&#39;s really nice to hear from you that you like ASP.NET'" /> Notice that there is no script! There is no call to the $create() method. In fact, there is no inline JavaScript at all. The jQuery version of the ToggleButton uses an HTML5 data-* attribute instead of an inline script. The ToggleButton control is instantiated with a data-act-togglebuttonextender attribute. Using data-* attributes results in much cleaner markup (You don’t need to feel embarrassed when selecting View Source in your browser). Ajax Control Toolkit versus jQuery So in a jQuery world why is the Ajax Control Toolkit needed at all? Why not just use jQuery plugins instead of the Ajax Control Toolkit? For example, there are lots of jQuery ToggleButton plugins floating around the Internet. Why not just use one of these jQuery plugins instead of using the Ajax Control Toolkit ToggleButton control? There are three main reasons why the Ajax Control Toolkit continues to be valuable in a jQuery world: Ajax Control Toolkit controls run on both the server and client jQuery plugins are client only. A jQuery plugin does not include any server-side code. If you need to perform any work on the server – think of the AjaxFileUpload control – then you can’t use a pure jQuery solution. Ajax Control Toolkit controls provide a better Visual Studio experience You don’t get any design time experience when you use jQuery plugins within Visual Studio. Ajax Control Toolkit controls, on the other hand, are designed to work with Visual Studio. For example, you can use the Visual Studio Properties window to set Ajax Control Toolkit control properties. Ajax Control Toolkit controls shield you from working with JavaScript I like writing code in JavaScript. However, not all developers like JavaScript and some developers want to completely avoid writing any JavaScript code at all. The Ajax Control Toolkit enables you to take advantage of JavaScript (and the latest features of HTML5) in your ASP.NET Web Forms websites without writing a single line of JavaScript. Better ToolkitScriptManager Documentation With this release, we have added more detailed documentation for using the ToolkitScriptManager. In particular, we added documentation that describes how to take advantage of the new bundling, minification, compression, and caching features of the Ajax Control Toolkit. The ToolkitScriptManager documentation is part of the Ajax Control Toolkit sample site and it can be read here: http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/ToolkitScriptManager/ToolkitScriptManager.aspx Other Fixes This release of the Ajax Control Toolkit includes several important bug fixes. For example, the Ajax Control Toolkit Twitter control was completely rewritten with this release. Twitter is in the process of retiring the first version of their API. You can read about their plans here: https://dev.twitter.com/blog/planning-for-api-v1-retirement We completely rewrote the Ajax Control Toolkit Twitter control to use the new Twitter API. To take advantage of the new Twitter API, you must get a key and access token from Twitter and add the key and token to your web.config file. Detailed instructions for using the new version of the Ajax Control Toolkit Twitter control can be found here: http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/Twitter/Twitter.aspx   Summary We’ve made some really great changes to the Ajax Control Toolkit over the last two releases to modernize the toolkit. In the previous release, we updated the Ajax Control Toolkit to use a better bundling, minification, compression, and caching system. With this release, we updated the Ajax Control Toolkit to support jQuery. We also continue to update the Ajax Control Toolkit with important bug fixes. I hope you like these changes and I look forward to hearing your feedback.

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  • Why is AutoCompleteExtender not firing?

    - by Antoine
    Hi, I have some issue with the ASP AutoCompleteExtender control. I got one in my page that is working fine, but I have put another one in the same page, and I can't get it to work. Using HTTP Analyzer, no query is fired when I type into the textbox associated with it. Has anyone an idea? Both call the same webservice, with a different ContextKey parameter. The webservice cannot be the cause as it works in the first case (DevMgrTxtBox), and is not even called in the second (DevTxtBox). Properties of both controls are similar, I just changed the ID and targetControlID of the second. The code below is in a ContentPlaceHolder. I'm using VS2005 with .NET 2.0. AjaxControlToolkit.dll is in version 1.0.20229.0. EDIT: solution found. The ID is not the only thing that needs to be unique, the BehaviorID property must be unique too. Which wasn't documented. <tr> <td> <asp:Label ID="DevtMgrLbl" runat="server" Text="Development Manager"></asp:Label> </td> <td> <asp:UpdatePanel runat="server" id="devMgrPanel"> <contenttemplate> <asp:TextBox id="DevMgrTxtBox" runat="server"></asp:TextBox> <ajaxToolkit:AutoCompleteExtender id="AutoCompleteRole1" runat="server" CompletionSetCount="5" EnableCaching="true" BehaviorID="autoCompleteExtender" CompletionInterval="100" MinimumPrefixLength="2" ServiceMethod="GetRoleList" ServicePath="AutoCompleteRoles.asmx" TargetControlID="DevMgrTxtBox" ContextKey="DM"> </ajaxToolkit:AutoCompleteExtender> </contenttemplate> <triggers> <asp:AsyncPostBackTrigger ControlID="DevMgrTxtBox" EventName="TextChanged"></asp:AsyncPostBackTrigger> </triggers> </asp:UpdatePanel> </td> </tr> <tr> <td> <asp:Label ID="DevLbl" runat="server" Text="Developer"></asp:Label> </td> <td> <asp:UpdatePanel runat="server" id="devPanel"> <contenttemplate> <asp:TextBox ID="DevTxtBox" runat="server"></asp:TextBox> <ajaxToolkit:AutoCompleteExtender id="AutoCompleteRole2" runat="server" CompletionSetCount="5" EnableCaching="true" BehaviorID="autoCompleteExtender" CompletionInterval="100" MinimumPrefixLength="2" ServiceMethod="GetRoleList" ServicePath="AutoCompleteRoles.asmx" TargetControlID="DevTxtBox" ContextKey="DEV"> </ajaxToolkit:AutoCompleteExtender> </contenttemplate> <triggers> <asp:AsyncPostBackTrigger ControlID="DevTxtBox" EventName="TextChanged"></asp:AsyncPostBackTrigger> </triggers> </asp:UpdatePanel> </td> </tr>

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  • 10 Great Free Icon Packs To Theme Your Android Phone

    - by Chris Hoffman
    Android allows you to customize your home screen, adding widgets, arranging shortcuts and folders, choosing a background, and even replacing the included launcher entirely. You can install icon packs to theme your app icons, too. Third-party launchers use standard app icons by default, but they don’t have to. You can install icon packs that third-party launchers will use in place of standard app icons. How to Use Icon Packs To use icon packs, you’ll need to use a third-party launcher that supports them, such as Nova, Apex, ADW, Go Launcher, Holo Launcher, or Action Launcher Pro. Once you’re using a third-party launcher, you can install an icon pack and go into your launcher’s settings. You’ll find an option that allows you to choose between the icon packs you’ve installed. Many of these icon packs also include wallpapers, which you can set in the normal way. MIUI 5 Icons This icon pack offers over 1900 free icons that are similar to the icons used by the MIUi ROM developed by China’s Xiaomi Tech. The large list of icons is a big plus — this pack will give the majority of your app icons a very slick, consistent look. DCikonZ Theme DCikonZ is a free icon theme that includes a whopping 4000+ icons with a consistent look. This icon theme stands out not just because it’s huge, but also for offering for going in its own direction and avoiding the super-simple, flat look many icon packs use. Holo Icons Holo Icons replaces many app icons with simple, consistent-looking that match Google’s Holo style. If you’re a fan of Android’s Holo look, give it a try. It even tweaks many of the icons from Google’s own apps to make them look more consistent. Square Icon Pack Square Icon Pack turns your icons into simple squares. Even Google Chrome becomes an orb instead of a square. This makes every icon a consistent size and offers a unique look. The icons here almost look a bit like the small-size tiles available on Windows Phone and Windows 8.1. The free version doesn’t offer as many icons as the paid version, but it does offer icons for many popular apps. Rounded Want rounded icons instead? Try the Rounded icon theme, which offers simple rounded icons. The developer says they’re inspired by the consistently round icons used on Mozilla’s Firefox OS. Crumbled Icon Pack Crumbled Icon Pack applies an effect that makes icons look as if they’r crumbling. Rather than theming individual icons, Crumbled Icon Pack adds an effect to every app icon on your device. This means that all your app icons will be themed and consistent. Dainty Icon Pack Is your Android home screen too colorful? Dainty Icon Pack offers simple, gray-on-white icons for over 1200 apps. It’d be ideal over a simple background. The contrast may be a bit low here with the gray-on-white, but it’s otherwise very slick. Simplex Icons Simplex Icons offers more contrast, with black-on-gray icons. This icon pack could simplify busy home screens, allowing photographic wallpapers to come through. Min Icon Set Min attempts to go as minimal as possible, offering simple white icons for over 570 apps. It would be ideal over a simple wallpaper with app names hidden in your launcher, offering a calming, minimal home screen. For apps it doesn’t recognize, it will enclose part of the app’s icon in a white circle. Elegance Elegance goes in another direction entirely, offering icons that incorporate more details and gradients rather than going for minimalism. Its over 1200 icons offer another good option for people who aren’t into the minimal, flat look. Icon pack designers generally have to create and include their own icons to replace icons associated with specific apps, so you’ll probably find a few of your app icons aren’t replaced with most of these themes. Of course, a standard Android phone without an icon pack doesn’t have consistent icons, either. Even if all the icons in your app drawer aren’t themed, the few app icons you have on your home screen will be if you use widely used apps.     

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  • Allowing Access to HttpContext in WCF REST Services

    - by Rick Strahl
    If you’re building WCF REST Services you may find that WCF’s OperationContext, which provides some amount of access to Http headers on inbound and outbound messages, is pretty limited in that it doesn’t provide access to everything and sometimes in a not so convenient manner. For example accessing query string parameters explicitly is pretty painful: [OperationContract] [WebGet] public string HelloWorld() { var properties = OperationContext.Current.IncomingMessageProperties; var property = properties[HttpRequestMessageProperty.Name] as HttpRequestMessageProperty; string queryString = property.QueryString; var name = StringUtils.GetUrlEncodedKey(queryString,"Name"); return "Hello World " + name; } And that doesn’t account for the logic in GetUrlEncodedKey to retrieve the querystring value. It’s a heck of a lot easier to just do this: [OperationContract] [WebGet] public string HelloWorld() { var name = HttpContext.Current.Request.QueryString["Name"] ?? string.Empty; return "Hello World " + name; } Ok, so if you follow the REST guidelines for WCF REST you shouldn’t have to rely on reading query string parameters manually but instead rely on routing logic, but you know what: WCF REST is a PITA anyway and anything to make things a little easier is welcome. To enable the second scenario there are a couple of steps that you have to take on your service implementation and the configuration file. Add aspNetCompatibiltyEnabled in web.config Fist you need to configure the hosting environment to support ASP.NET when running WCF Service requests. This ensures that the ASP.NET pipeline is fired up and configured for every incoming request. <system.serviceModel>     <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" /> </system.serviceModel> Markup your Service Implementation with AspNetCompatibilityRequirements Attribute Next you have to mark up the Service Implementation – not the contract if you’re using a separate interface!!! – with the AspNetCompatibilityRequirements attribute: [ServiceContract(Namespace = "RateTestService")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class RestRateTestProxyService Typically you’ll want to use Allowed as the preferred option. The other options are NotAllowed and Required. Allowed will let the service run if the web.config attribute is not set. Required has to have it set. All these settings determine whether an ASP.NET host AppDomain is used for requests. Once Allowed or Required has been set on the implemented class you can make use of the ASP.NET HttpContext object. When I allow for ASP.NET compatibility in my WCF services I typically add a property that exposes the Context and Request objects a little more conveniently: public HttpContext Context { get { return HttpContext.Current; } } public HttpRequest Request { get { return HttpContext.Current.Request; } } While you can also access the Response object and write raw data to it and manipulate headers THAT is probably not such a good idea as both your code and WCF will end up writing into the output stream. However it might be useful in some situations where you need to take over output generation completely and return something completely custom. Remember though that WCF REST DOES actually support that as well with Stream responses that essentially allow you to return any kind of data to the client so using Response should really never be necessary. Should you or shouldn’t you? WCF purists will tell you never to muck with the platform specific features or the underlying protocol, and if you can avoid it you definitely should avoid it. Querystring management in particular can be handled largely with Url Routing, but there are exceptions of course. Try to use what WCF natively provides – if possible as it makes the code more portable. For example, if you do enable ASP.NET Compatibility you won’t be able to self host a WCF REST service. At the same time realize that especially in WCF REST there are number of big holes or access to some features are a royal pain and so it’s not unreasonable to access the HttpContext directly especially if it’s only for read-only access. Since everything in REST works of URLS and the HTTP protocol more control and easier access to HTTP features is a key requirement to building flexible services. It looks like vNext of the WCF REST stuff will feature many improvements along these lines with much deeper native HTTP support that is often so useful in REST applications along with much more extensibility that allows for customization of the inputs and outputs as data goes through the request pipeline. I’m looking forward to this stuff as WCF REST as it exists today still is a royal pain (in fact I’m struggling with a mysterious version conflict/crashing error on my machine that I have not been able to resolve – grrrr…).© Rick Strahl, West Wind Technologies, 2005-2011Posted in ASP.NET  AJAX  WCF  

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  • ASP.NET MVC JavaScript Routing

    - by zowens
    Have you ever done this sort of thing in your ASP.NET MVC view? The weird thing about this isn’t the alert function, it’s the code block containing the Url formation using the ASP.NET MVC UrlHelper. The terrible thing about this experience is the obvious lack of IntelliSense and this ugly inline JavaScript code. Inline JavaScript isn’t portable to other pages beyond the current page of execution. It is generally considered bad practice to use inline JavaScript in your public-facing pages. How ludicrous would it be to copy and paste the entire jQuery code base into your pages…? Not something you’d ever consider doing. The problem is that your URLs have to be generated by ASP.NET at runtime and really can’t be copied to your JavaScript code without some trickery. How about this? Does the hard-coded URL bother you? It really bothers me. The typical solution to this whole routing in JavaScript issue is to just hard-code your URLs into your JavaScript files and call it done. But what if your URLs change? You have to now go an track down the places in JavaScript and manually replace them. What if you get the pattern wrong? Do you have tests around it? This isn’t something you should have to worry about.   The Solution To Our Problems The solution is to port routing over to JavaScript. Does that sound daunting to you? It’s actually not very hard, but I decided to create my own generator that will do all the work for you. What I have created is a very basic port of the route formation feature of ASP.NET routing. It will generate the formatted URLs based on your routing patterns. Here’s how you’d do this: Does that feel familiar? It looks a lot like something you’d do inside of your ASP.NET MVC views… but this is inside of a JavaScript file… just a plain ol’ .js file.  Your first question might be why do you have to have that “.toUrl()” thing. The reason is that I wanted to make POST and GET requests dead simple. Here’s how you’d do a POST request (and the same would work with a GET request):   The first parameter is extra data passed to the post request and the second parameter is a function that handles the success of the POST request. If you’re familiar with jQuery’s Ajax goodness, you’ll know how to use it. (if not, check out http://api.jquery.com/jQuery.Post/ and the parameters are essentially the same). But we still haven’t gotten rid of the magic strings. We still have controller names and action names represented as strings. This is going to blow your mind… If you’ve seen T4MVC, this will look familiar. We’re essentially doing the same sort of thing with my JavaScript router, but we’re porting the concept to JavaScript. The good news is that parameters to the controllers are directly reflected in the action function, just like T4MVC. And the even better news… IntlliSense is easily transferred to the JavaScript version if you’re using Visual Studio as your JavaScript editor. The additional data parameter gives you the ability to pass extra routing data to the URL formatter.   About the Magic You may be wondering how this all work. It’s actually quite simple. I’ve built a simple jQuery pluggin (called routeManager) that hangs off the main jQuery namespace and routes all the URLs. Every time your solution builds, a routing file will be generated with this pluggin, all your route and controller definitions along with your documentation. Then by the power of Visual Studio, you get some really slick IntelliSense that is hard to live without. But there are a few steps you have to take before this whole thing is going to work. First and foremost, you need a reference to the JsRouting.Core.dll to your projects containing controllers or routes. Second, you have to specify your routes in a bit of a non-standard way. See, we can’t just pull routes out of your App_Start in your Global.asax. We force you to build a route source like this: The way we determine the routes is by pulling in all RouteSources and generating routes based upon the mapped routes. There are various reasons why we can’t use RouteCollection (different post for another day)… but in this case, you get the same route mapping experience. Converting the RouteSource to a RouteCollection is trivial (there’s an extension method for that). Next thing you have to do is generate a documentation XML file. This is done by going to the project settings, going to the build tab and clicking the checkbox. (this isn’t required, but nice to have). The final thing you need to do is hook up the generation mechanism. Pop open your project file and look for the AfterBuild step. Now change the build step task to look like this: The “PathToOutputExe” is the path to the JsRouting.Output.exe file. This will change based on where you put the EXE. The “PathToOutputJs” is a path to the output JavaScript file. The “DicrectoryOfAssemblies” is a path to the directory containing controller and routing DLLs. The JsRouting.Output.exe executable pulls in all these assemblies and scans them for controllers and route sources.   Now that wasn’t too bad, was it :)   The State of the Project This is definitely not complete… I have a lot of plans for this little project of mine. For starters, I need to look at the generation mechanism. Either I will be creating a utility that will do the project file manipulation or I will go a different direction. I’d like some feedback on this if you feel partial either way. Another thing I don’t support currently is areas. While this wouldn’t be too hard to support, I just don’t use areas and I wanted something up quickly (this is, after all, for a current project of mine). I’ll be adding support shortly. There are a few things that I haven’t covered in this post that I will most certainly be covering in another post, such as routing constraints and how these will be translated to JavaScript. I decided to open source this whole thing, since it’s a nice little utility I think others should really be using. Currently we’re using ASP.NET MVC 2, but it should work with MVC 3 as well. I’ll upgrade it as soon as MVC 3 is released. Along those same lines, I’m investigating how this could be put on the NuGet feed. Show me the Bits! OK, OK! The code is posted on my GitHub account. Go nuts. Tell me what you think. Tell me what you want. Tell me that you hate it. All feedback is welcome! https://github.com/zowens/ASP.NET-MVC-JavaScript-Routing

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  • ASP.NET MVC Html.DropDownListFor Select value

    - by user295541
    Hi, I have a little problem. I use the Html.DropDownListFor helper to render a dropdown list to the client. But I can't set the selected value in dropdown list. <%= Html.DropDownListFor(model = Model.CalculationClassCollection, new SelectList(Model.CalculationClassCollection, "ID", "Name", 3 ), new { id = "ddCalculationClass" })% Anybody can help me?

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  • ASP.Net MVC 2 DropDownListFor in EditorTemplate

    - by tschreck
    I have a view model that looks like this: namespace AutoForm.Models { public class ProductViewModel { [UIHint("DropDownList")] public String Category { get; set; } [ScaffoldColumn(false)] public IEnumerable<SelectListItem> CategoryList { get; set; } ... } } It has Category and CategoryList properties. The CategoryList is the source data for the Category dropdown UI element. I have an EditorTemplate that looks like this: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<ProductViewModel>" %> <%@ Import Namespace="AutoForm.Models"%> <%=Html.DropDownListFor(m => m.Category , Model.CategoryList ) %> NOTE: this EditorTemplate is strongly typed to ProductViewModel My Controller is populating CategoryList property with data from a database. I cannot get the DropDownListFor template to render a drop down list with data from CategoryList. I know CategoryList is getting populated with data in the controller because I see the data when I debug and step through the controller. Here's my error message in the browser: Server Error in '/' Application. Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: Line 2: <%@ Import Namespace="AutoForm.Models"% Line 3: Line 4: <%=Html.DropDownListFor(m = m.Category, Model.CategoryList) % Source File: c:\ProjectStore\AutoForm\AutoForm\Views\Shared\EditorTemplates\DropDownList.ascx Line: 4 Any ideas? Thanks Tom As a followup, I noticed that ViewData.Model is null when I'm stepping through the code in the EditorTemplate. I have the EditorTemplate strongly typed to "ProductViewModel" which is also the type that's passed to the View in the controller. I'm perplexed as to why ViewData.Model is null even though it's getting populated in the controller before getting passed to the view.

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  • RadioButtonFor in ASP.NET MVC 2

    - by Larsenal
    Can someone provide a simple example of how to properly use Html.RadioButtonFor? Let's say it's a simple scenario where my model has a string property named Gender. I want to display two radio buttons: "Male" and "Female". What is the most clean way to implement this while retaining the selected value in an Edit view?

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  • what does square bracket syntax mean above a method in C#, ASP.NET

    - by Alexander
    I am just looking a bunch of codes that I am trying to learn from an open source project and sometimes I see a square brackets above a function such as: [EdmFunction("NerdDinnerModel.Store", "DistanceBetween")] public static double DistanceBetween(double lat1, double long1, double lat2, double long2) or [Bind(Include = "Title,Description,EventDate,Address,Country,ContactPhone,Latitude,Longitude")] [MetadataType(typeof(Dinner_Validation))] public partial class Dinner

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  • JqGrid addJSONData + ASP.NET 2.0 WS

    - by MilosC
    Dear community ! I am a bit lost. I' ve tried to implement a solution based on JqGrid and tried to use function as datatype. I've setted all by the book i guess, i get WS invoked and get JASON back, I got succes on clientside in ajaf call and i "bind" jqGrid using addJSONData but grid remains empty. I do not have any glue now... other "local" samples on same pages works without a problem (jsonstring ...) My WS method looks like : [WebMethod] [ScriptMethod(ResponseFormat = ResponseFormat.Json)] public string GetGridData() { // Load a list InitSessionVariables(); SA.DB.DenarnaEnota.DenarnaEnotaDB db = new SAOP.SA.DB.DenarnaEnota.DenarnaEnotaDB(); DataSet ds = db.GetLookupForDenarnaEnota(SAOP.FW.DB.RecordStatus.All); // Turn into HTML friendly format GetGridData summaryList = new GetGridData(); summaryList.page = "1"; summaryList.total = "10"; summaryList.records = "160"; int i = 0; foreach (DataRow dr in ds.Tables[0].Rows) { GridRows row = new GridRows(); row.id = dr["DenarnaEnotaID"].ToString(); row.cell = "[" + "\"" + dr["DenarnaEnotaID"].ToString() + "\"" + "," + "\"" + dr["Kratica"].ToString() + "\"" + "," + "\"" + dr["Naziv"].ToString() + "\"" + "," + "\"" + dr["Sifra"].ToString() + "\"" + "]"; summaryList.rows.Add(row); } return JsonConvert.SerializeObject(summaryList); } my ASCX code is this: jQuery(document).ready(function(){ jQuery("#list").jqGrid({ datatype : function (postdata) { jQuery.ajax({ url:'../../AjaxWS/TemeljnicaEdit.asmx/GetGridData', data:'{}', dataType:'json', type: 'POST', contentType: "application/json; charset=utf-8", complete: function(jsondata,stat){ if(stat=="success") { var clearJson = jsondata.responseText; var thegrid = jQuery("#list")[0]; var myjsongrid = eval('('+clearJson+')'); alfs thegrid.addJSONData(myjsongrid.replace(/\\/g,'')); } } } ); }, colNames:['DenarnaEnotaID','Kratica', 'Sifra', 'Naziv'], colModel:[ {name:'DenarnaEnotaID',index:'DenarnaEnotaID', width:100}, {name:'Kratica',index:'Kratica', width:100}, {name:'Sifra',index:'Sifra', width:100}, {name:'Naziv',index:'Naziv', width:100}], rowNum:15, rowList:[15,30,100], pager: jQuery('#pager'), sortname: 'id', // loadtext:"Nalagam zapise...", // viewrecords: true, sortorder: "desc", // caption:"Vrstice", // width:"800", imgpath: "../Scripts/JGrid/themes/basic/images"}); }); from WS i GET JSON like this: {”page”:”1?,”total”:”10?,”records”:”160?,”rows”:[{"id":"18","cell":"["18","BAM","Konvertibilna marka","977"]“},{”id”:”19?,”cell”:”["19","RSD","Srbski dinar","941"]“},{”id”:”20?,”cell”:”["20","AFN","Afgani","971"]“},{”id”:”21?,”cell”:”["21","ALL","Lek","008"]“},{”id”:”22?,”cell”:”["22","DZD","Alžirski dinar","012"]“},{”id”:”23?,”cell”:”["23","AOA","Kvanza","973"]“},{”id”:”24?,”cell”:”["24","XCD","Vzhodnokaribski dolar","951"]“},{”id”:”25?,”cell”:” ……………… ["13","PLN","Poljski zlot","985"]“},{”id”:”14?,”cell”:”["14","SEK","Švedska krona","752"]“},{”id”:”15?,”cell”:”["15","SKK","Slovaška krona","703"]“},{”id”:”16?,”cell”:”["16","USD","Ameriški dolar","840"]“},{”id”:”17?,”cell”:”["17","XXX","Nobena valuta","000"]“},{”id”:”1?,”cell”:”["1","SIT","Slovenski tolar","705"]“}]} i have registered this js : clientSideScripts.RegisterClientScriptFile("prototype.js", CommonFunctions.FixupUrlWithoutSessionID("~/WebUI/Scripts/prototype-1.6.0.2.js")); clientSideScripts.RegisterClientScriptFile("jquery.js", CommonFunctions.FixupUrlWithoutSessionID("~/WebUI/Scripts/JGrid/jquery.js")); clientSideScripts.RegisterClientScriptFile("jquery.jqGrid.js", CommonFunctions.FixupUrlWithoutSessionID("~/WebUI/Scripts/JGrid/jquery.jqGrid.js")); clientSideScripts.RegisterClientScriptFile("jqModal.js", CommonFunctions.FixupUrlWithoutSessionID("~/WebUI/Scripts/JGrid/js/jqModal.js")); clientSideScripts.RegisterClientScriptFile("jqDnR.js", CommonFunctions.FixupUrlWithoutSessionID("~/WebUI/Scripts/JGrid/js/jqDnR.js")); Basical i think it must be something stupid ...but i can figure it out now... Help wanted.

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  • Problem displaying custom error page in ASP.NET MVC 2

    - by robert_d
    This is customErrors section from my web.config file <customErrors mode="On"> <error statusCode="500" redirect="HTTP500.aspx" /> </customErrors> HTTP500.aspx is the same as standard /Views/Shared/Error.aspx page. When I get HTTP 500 error I see this page: Server Error in '/' Application. Runtime Error Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed. Details: To enable the details of this specific error message to be viewable on the local server machine, please create a tag within a "web.config" configuration file located in the root directory of the current web application. This tag should then have its "mode" attribute set to "RemoteOnly". To enable the details to be viewable on remote machines, please set "mode" to "Off". Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's configuration tag to point to a custom error page URL. But when I change the above customErrors section like this: <customErrors mode="On"> <error statusCode="500" redirect="HTTP500.htm" /> </customErrors> then HTTP500.htm page is displayed when HTTP 500 error occurs. Why HTTP500.aspx page isn't displayed?

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