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• How do you display a list of images, from a folder on hard drive, on ASP.NET website?

  - by Jordan S

  I am trying to make a simple photo gallery website. Using ASP.NET and C#. Right now I don't have a server set up but I am just using the development one that Visual Studio Starts when you make a website project and run it. I have a folder on my hard drive that contains an unknown number of images. I want to write a piece of code that will go through each image and add them to the default webpage. I have tried this code but it doesn't work. What am I doing wrong? Should I be using a ListView control or a DataView or something like that? Do I need to add a virtual directory in order to access the images? If so, how do I to that on this test server? ALSO, how do I set the position and alignment of these pictures? For example, how would I make it so that the pictures are in a line vertically and centered on the webpage? protected void Page_Load(object sender, EventArgs e) { string[] filesindirectory = Directory.GetFiles(@"C:\Users\Jordan\Desktop\Web Images"); int i = 1; foreach (string s in filesindirectory) { Image img = new Image(); img.ID = "image" + i.ToString(); img.ImageUrl = s; img.Visible = true; Page.Controls.Add(img); i++; } }

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• Process.Start() and ShellExecute() fails with URLs on Windows 8

  - by Rick Strahl

  Since I installed Windows 8 I've noticed that a number of my applications appear to have problems opening URLs. That is when I click on a link inside of a Windows application, either nothing happens or there's an error that occurs. It's happening both to my own applications and a host of Windows applications I'm running. At first I thought this was an issue with my default browser (Chrome) but after switching the default browser to a few others and experimenting a bit I noticed that the errors occur - oddly enough - only when I run an application as an Administrator. I also tried switching to FireFox and Opera as my default browser and saw exactly the same behavior. The scenario for this is a bit bizarre: Running on Windows 8 Call Process.Start() (or ShellExecute() in Win32 API) with a URL or an HTML file Run 'As Administrator' (works fine under non-elevated user account!) or with UAC off A browser other than Internet Explorer is set as your Default Web Browser Talk about a weird scenario: Something that doesn't work when you run as an Administrator which is supposed to have rights to everything on the system! Instead running under an Admin account - either elevated with a User Account Control prompt or even when running as a full Administrator fails. It appears that this problem does not occur for everyone, but when I looked for a solution to this, I saw quite a few posts in relation to this with no clear resolutions. I have three Windows 8 machines running here in the office and all three of them showed this behavior. Lest you think this is just a programmer's problem - this can affect any software running on your system that needs to run under administrative rights. Try it out Now, in order for this next example to fail, any browser but Internet Explorer has to be your default browser and even then it may not fail depending on how you installed your browser. To see if this is a problem create a small Console application and call Process.Start() with a URL in it:namespace Win8ShellBugConsole { class Program { static void Main(string[] args) { Console.WriteLine("Launching Url..."); Process.Start("http://microsoft.com"); Console.Write("Press any key to continue..."); Console.ReadKey(); Console.WriteLine("\r\n\r\nLaunching image..."); Process.Start(Path.GetFullPath(@"..\..\sailbig.jpg")); Console.Write("Press any key to continue..."); Console.ReadKey(); } } } Compile this code. Then execute the code from Explorer (not from Visual Studio because that may change the permissions). If you simply run the EXE and you're not running as an administrator, you'll see the Web page pop up in the browser as well as the image loading. Now run the same thing with Run As Administrator: Now when you run it you get a nice error when Process.Start() is fired: The same happens if you are running with User Account Control off altogether - ie. you are running as a full admin account. Now if you comment out the URL in the code above and just fire the image display - that works just fine in any user mode. As does opening any other local file type or even starting a new EXE locally (ie. Process.Start("c:\windows\notepad.exe"). All that works, EXCEPT for URLs. The code above uses Process.Start() in .NET but the same happens in Win32 Applications that use the ShellExecute API. In some of my older Fox apps ShellExecute returns an error code of 31 - which is No Shell Association found. What's the Deal? It turns out the problem has to do with the way browsers are registering themselves on Windows. Internet Explorer - being a built-in application in Windows 8 - apparently does this correctly, but other browsers possibly don't or at least didn't at the time I installed them. So even Chrome, which continually updates itself, has a recent version that apparently has this registration issue fixed, I was unable to simply set IE as my default browser then use Chrome to 'Set as Default Browser'. It still didn't work. Neither did using the Set Program Associations dialog which lets you assign what extensions are mapped to by a given application. Each application provides a set of extension/moniker mappings that it supports and this dialog lets you associate them on a system wide basis. This also did not work for Chrome or any of the other browsers at first. However, after repeated retries here eventually I did manage to get FireFox to work, but not any of the others. What Works? Reinstall the Browser In the end I decided on the hard core pull the plug solution: Totally uninstall and re-install Chrome in this case. And lo and behold, after reinstall everything was working fine. Now even removing the association for Chrome, switching to IE as the default browser and then back to Chrome works. But, even though the version of Chrome I was running before uninstalling and reinstalling is the same as I'm running now after the reinstall now it works. Of course I had to find out the hard way, before Richard commented with a note regarding what the issue is with Chrome at least: http://code.google.com/p/chromium/issues/detail?id=156400 As expected the issue is a registration issue - with keys not being registered at the machine level. Reading this I'm still not sure why this should be a problem - an elevated account still runs under the same user account (ie. I'm still rickstrahl even if I Run As Administrator), so why shouldn't an app be able to read my Current User registry hive? And also that doesn't quite explain why if I register the extensions using Run As Administrator in Chrome when using Set as Default Browser). But in the end it works… Not so fast It's now a couple of days later and still there are some oddball problems although this time they appear to be purely Chrome issues. After the reinstall Chrome seems to pop up properly with ShellExecute() calls both in regular user and Admin mode. However, it now looks like Chrome is actually running two completely separate user profiles for each. For example, when I run Visual Studio in Admin mode and go to View in browser, Chrome complains that it was installed in Admin mode and can't launch (WTF?). Then you retry a few times later and it ends up working. When launched that way some of the plug-ins installed don't show up with the effect that sometimes they're visible sometimes they're not. Also Chrome seems to loose my configuration and Google sign in between sessions now, presumably when switching user modes. Add-ins installed in admin mode don't show up in user mode and vice versa. Ah, this is lovely. Did I mention that I freaking hate UAC precisely because of this kind of bullshit. You can never tell exactly what account your app is running under, and apparently apps also have a hard time trying to put data into the right place that works for both scenarios. And as my recent post on using Windows Live accounts shows it's yet another level of abstraction ontop of the underlying system identity that can cause all sort of small side effect headaches like this. Hopefully, most of you are skirting this issue altogether - having installed more recent versions of your favorite browsers. If not, hopefully this post will take you straight to reinstallation to fix this annoying issue.© Rick Strahl, West Wind Technologies, 2005-2012Posted in Windows  .NET   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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• Can't hit breakpoint in ASP.NET web app (Stop debugging in progress... popup in VS)

  - by dotnetdev

  Hi, I am trying to debug some code in my ASP.NET web app. I set a breakpoint in one of the page events of the page's codebehind, and this once came up with a special icon in place of the red breakpoint saying symbols have not been loaded and the breakpoint will not be hit. This error has not repeated itself but why can't I hit the breakpoint? Also, when I press stop, I get a popup in VS stating: Stop Debugging In Progres... Debugging is being stopped but is not yet complete. You can force debugging to stop completely, but any processes attached may terminate. This window will automatically close when debugging has completely stopped. Completely stop I also don't get the website appear in my browser either when starting to debug. :( To make things worse, I have a line of code like this in my page's codebehind: RssFeedSites = opml.Parse(filestream); I am putting the problematic breakpoint on this line. But I have a programatic breakpoint in the Parse() method of opml, but this does not get hit, either. Thanks

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• CodePlex Daily Summary for Monday, June 13, 2011

  CodePlex Daily Summary for Monday, June 13, 2011Popular ReleasesCommunity TFS Build Extensions: Alpha 1.0.0.4: Please see the Source Control change sets for updates in this release This is a minor release to wrap up the BuildReport activity This release contains signed assemblies and a CHM file. Effort is now going into improving the documentation. Note the help on the Guid activity. We plan to provide Actions and a self contained Sequence sample whenever possible. This should address most peoples needs. You can expect frequent updates over the next month as we add more activities and improve the ...Mobile Device Detection and Redirection: 1.0.4.1: Stable Release 51 Degrees.mobi Foundation is the best way to detect and redirect mobile devices and their capabilities on ASP.NET and is being used on thousands of websites worldwide. We’re highly confident in our software and we recommend all users update to this version. Changes to Version 1.0.4.1Changed the BlackberryHandler and BlackberryVersion6Handler to have equal CONFIDENCE values to ensure they both get a chance at detecting BlackBerry version 4&5 and version 6 devices. Prior to thi...Rawr: Rawr 4.1.06: This is the Downloadable WPF version of Rawr!For web-based version see http://elitistjerks.com/rawr.php You can find the version notes at: http://rawr.codeplex.com/wikipage?title=VersionNotes Rawr AddonWe now have a Rawr Official Addon for in-game exporting and importing of character data hosted on Curse. The Addon does not perform calculations like Rawr, it simply shows your exported Rawr data in wow tooltips and lets you export your character to Rawr (including bag and bank items) like Char...AcDown????? - Anime&Comic Downloader: AcDown????? v3.0 Beta6: ??AcDown?????????????，?????????????，????、????。?????Acfun????? ????32??64? Windows XP/Vista/7 ????????????? ??：????????Windows XP???,?????????.NET Framework 2.0???(x86)?.NET Framework 2.0???(x64)，?????"?????????"??? ??v3.0 Beta6 ?????(imanhua.com)????? ???? ?? ??"????","?????","?????","????"?????? "????"?????"????????"?? ??????????? ?????????????? ?????????????/???? ?? ????Windows 7???????????? ????????? ?? ????????????? ???????/??????????? ???????????? ?? ?? ?????(imanh...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.22: Added lots of optimizations related to expression optimization. Combining adjacent expression statements into a single statement means more if-, for-, and while-statements can get rid of the curly-braces. Then more if-statements can be converted to expressions, and more expressions can be combined with return- and for-statements. Moving functions to the top of their scopes, followed by var-statements, provides more opportunities for expression-combination. Added command-line option to remove ...Pulse: Pulse Beta 2: - Added new wallpapers provider http://wallbase.cc. Supports english search, multiple keywords* - Improved font rendering in Options window - Added "Set wallpaper as logon background" option* - Fixed crashes if there is no internet connection - Fixed: Rewalls downloads empty images sometimes - Added filters* Note 1: wallbase provider supports only english search. Rewalls provider supports only russian search but Pulse automatically translates your english keyword into russian using Google Tr...SizeOnDisk: 1.0.8.4: Fix: Contextual menu failures. Switch to ShellExecuteEx of Win32Api.Phalanger - The PHP Language Compiler for the .NET Framework: 2.1 (June 2011) for .NET 4.0: Release of Phalanger 2.1 - the opensource PHP compiler for .NET framework 4.0. Installation package also includes basic version of Phalanger Tools for Visual Studio 2010. This allows you to easily create, build and debug Phalanger web or application inside this ultimate integrated development environment. You can even install the tools into the free Visual Studio 2010 Shell (Integrated). To improve the performance of your application using MySQL, please use Managed MySQL Extension for Phala...WPF Application Framework (WAF): WPF Application Framework (WAF) 2.0.0.7: Version: 2.0.0.7 (Milestone 7): This release contains the source code of the WPF Application Framework (WAF) and the sample applications. Requirements .NET Framework 4.0 (The package contains a solution file for Visual Studio 2010) The unit test projects require Visual Studio 2010 Professional Remark The sample applications are using Microsoft’s IoC container MEF. However, the WPF Application Framework (WAF) doesn’t force you to use the same IoC container in your application. You can use ...SimplePlanner: v2.0b: For 2011-2012 Sem 1 ???2011-2012 ????Visual Studio 2010 Help Downloader: 1.0.0.3: Domain name support for proxy Cleanup old packages bug Writing to EventLog with UAC enabled bug Small fixes & RefactoringMedia Companion: MC 3.406b weekly: With this version change a movie rebuild is required when first run -else MC will lock up on exit. Extract the entire archive to a folder which has user access rights, eg desktop, documents etc. Refer to the documentation on this site for the Installation & Setup Guide Important! If you find MC not displaying movie data properly, please try a 'movie rebuild' to reload the data from the nfo's into MC's cache. Fixes Movies Readded movie preference to rename invalid or scene nfo's to info ext...Windows Azure VM Assistant: AzureVMAssist V1.0.0.5: AzureVMAssist V1.0.0.5 (Debug) - Test Release VersionNetOffice - The easiest way to use Office in .NET: NetOffice Release 0.9: Changes: - fix examples (include issue 16026) - add new examples - 32Bit/64Bit Walkthrough is now available in technical Documentation. Includes: - Runtime Binaries and Source Code for .NET Framework:......v2.0, v3.0, v3.5, v4.0 - Tutorials in C# and VB.Net:..............................................................COM Proxy Management, Events, etc. - Examples in C# and VB.Net:............................................................Excel, Word, Outlook, PowerPoint, Access - COMAddi...Reusable Library: V1.1.3: A collection of reusable abstractions for enterprise application developerClosedXML - The easy way to OpenXML: ClosedXML 0.54.0: New on this release: 1) Mayor performance improvements. 2) AdjustToContents now take into account the text rotation. 3) Fixed issues 6782, 6784, 6788HTML-IDEx: HTML-IDEx .15 ALPHA: This release fixes line counting a little bit and adds the masshighlight() sub, which highlights pasted and inserted code.AutoLoL: AutoLoL v2.0.3: - Improved summoner spells are now displayed - Fixed some of the startup errors people got - Double clicking an item selects it - Some usability changes that make using AutoLoL just a little easier - Bug fixes AutoLoL v2 is not an update, but an entirely new version! Please install to a different directory than AutoLoL v1Host Profiles: Host Profiles 1.0: Host Profiles 1.0 Release Quickly modify host file Automatically flush dnsVidCoder: 0.9.2: Updated to HandBrake 4024svn. This fixes problems with mpeg2 sources: corrupted previews, incorrect progress indicators and encodes that incorrectly report as failed. Fixed a problem that prevented target sizes above 2048 MB.New ProjectsAFS - Application Foundation System: application foundation system,including organization structure,rights management,user management,event subscription etc.AuctionWorks: AuctionWorks 1.0Commander: CMD VB6 GUI a CMD application written in Visual Studio 2010 ultimate (VB6). Simple GUI interface, more functions to be addedCotizador de Serigrafia: Cotizador para Industrias SerigráficasESPGame: ESPGame renders a wonderful picture label game environment. It's developed in Python with web framework django.ETRoboCon Race Tracking System: The race tracking system of Embedded Technology Robot Contest in Japan.HNI2: get me at x.InkML JavaScript Library: The InkML JavaScript library allows InkML digital ink to be refernced within web pages and rendered directly into HTML5 <canvas> tags. Ink Markup Language (InkML) is a W3C standard for encoding digital ink (www.w3.org/tr/inkml). Ionut's C++ Programs: Ionut's C++ Programs Are you wondering were you can find software that suports any windows platform and the source code mai be compiled also for a NON-WINDOWS platforms. The Programs are Developed in C++ Mano Machine Emulator: Mano Machine Emulator makes it easier for Computer Science students to learn how the machine works in low level layers. You'll no longer have to imagine how the computer works, instead you will see how it works. It's developed in C#. MSMQ Client Library: MSMQ client library is a client for MSMQ server. It provides easy usage of MSMQ server, and can be used in any type of NET framework projects. It is developed in C#, Framework 4.0MVC Photos: ASP.NET MVC???????????。 mvcConf @:Japan???????????????。MvcPractice: learn the asp.net mvc3 source.Of Shared Points - Blog Demos and Samples: Blog samples and demonstration source code for "Of Shared Points" SharePoint blogPresentation Abstraction Control for Silverlight - PAC4SL: PAC4SL is a delivery framework used for developing Silverlight applications that uses the Presentation Abstraction Control delivery pattern. This delivery pattern is centered on team development with Silverlight. The focus of the pattern is spreading out of application logic into focused delivery tiers. The framework was developed in C# on the 4.0 framework and Silverlight 4.0 The framework is designed to be used with C# and Silverlight 4.0 or higher. queryexecutor: A generic database browserSilVM: MVVM, Silverlight, Arquitetura, ArchitectureSimple Dot Net Grapher: Demo project for drawing graphs based on a equation E.g F(x) = 5x^2 + 10x - 1 Just a math grapher I made to test the DynamicDataDisplay library and dynamic string evaluationSPEvolution: Migration for Microsoft SharePoint 2010 data - Content Types, List, Columns, ListItems and many other - in Rails-style. Write small evolution's steps which help to deploy and synchronize data schema beetween production and development environment. SQLDeploy.Net: SQLDeploy.Net is a utility to deploy [run] a set of SQL Scripts on SQL Server. The utility can be integrated with any deployment manager like Marimba , Hudson etc to automate database deployment. The project is developed on .Net Framework 4.0 but it is equally backward compatible. For a list of known issues and enhancements which are being worked upon, refer to Issue Tracker.webget: webgetwhoami: ip address resolverWPFGenie: about WPF, .Net, framework

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• How to use Castle Windsor with ASP.Net web forms?

  - by Xian

  I am trying to wire up dependency injection with Windsor to standard asp.net web forms. I think I have achieved this using a HttpModule and a CustomAttribute (code shown below), although the solution seems a little clunky and was wondering if there is a better supported solution out of the box with Windsor? There are several files all shown together here // index.aspx.cs public partial class IndexPage : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Logger.Write("page loading"); } [Inject] public ILogger Logger { get; set; } } // WindsorHttpModule.cs public class WindsorHttpModule : IHttpModule { private HttpApplication _application; private IoCProvider _iocProvider; public void Init(HttpApplication context) { _application = context; _iocProvider = context as IoCProvider; if(_iocProvider == null) { throw new InvalidOperationException("Application must implement IoCProvider"); } _application.PreRequestHandlerExecute += InitiateWindsor; } private void InitiateWindsor(object sender, System.EventArgs e) { Page currentPage = _application.Context.CurrentHandler as Page; if(currentPage != null) { InjectPropertiesOn(currentPage); currentPage.InitComplete += delegate { InjectUserControls(currentPage); }; } } private void InjectUserControls(Control parent) { if(parent.Controls != null) { foreach (Control control in parent.Controls) { if(control is UserControl) { InjectPropertiesOn(control); } InjectUserControls(control); } } } private void InjectPropertiesOn(object currentPage) { PropertyInfo[] properties = currentPage.GetType().GetProperties(); foreach(PropertyInfo property in properties) { object[] attributes = property.GetCustomAttributes(typeof (InjectAttribute), false); if(attributes != null && attributes.Length > 0) { object valueToInject = _iocProvider.Container.Resolve(property.PropertyType); property.SetValue(currentPage, valueToInject, null); } } } } // Global.asax.cs public class Global : System.Web.HttpApplication, IoCProvider { private IWindsorContainer _container; public override void Init() { base.Init(); InitializeIoC(); } private void InitializeIoC() { _container = new WindsorContainer(); _container.AddComponent<ILogger, Logger>(); } public IWindsorContainer Container { get { return _container; } } } public interface IoCProvider { IWindsorContainer Container { get; } }

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• How do I manage application configuration in ASP.NET?

  - by GlennS

  I am having difficulty with managing configuration of an ASP.Net application to deploy for different clients. The sheer volume of different settings which need twiddling takes up large amounts of time, and the current configuration methods are too complicated to enable us to push this responsibility out to support partners. Any suggestions for better methods to handle this or good sources of information to research? How we do things at present: Various xml configuration files which are referenced in Web.Config, for example an AppSettings.xml. Configurations for specific sites are kept in duplicate configuration files. Text files containing lists of data specific to the site In some cases, manual one-off changes to the database C# configuration for Windsor IOC. The specific issues we are having: Different sites with different features enabled, different external services we have to talk to and different business rules. Different deployment types (live, test, training) Configuration keys change across versions (get added, remove), meaning we have to update all the duplicate files We still need to be able to alter keys while the application is running Our current thoughts on how we might approach this are: Move the configuration into dynamically compiled code (possibly Boo, Binsor or JavaScript) Have some form of diffing/merging configuration: combine a default config with a live/test/training config and a site-specific config

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• How can I make a server log file available via my ASP.NET MVC website?

  - by Gary McGill

  I have an ASP.NET MVC website that works in tandem with a Windows Service that processes file uploads. For easy maintenance of the site, I'd like the log file for the Windows Service to be accessible (to me, only) via the website, so that I can hit http://myserver/logs/myservice to view the contents of the log file. How can I do that? At a guess, I could either have the service write its log file in a "Logs" folder at the top level of the site, or I could leave it where it is and set up a virtual directory to point to it. Which of these is better - or is there another, better way? Wherever the file is stored, I can see that there's going to be another problem. I tried out the first option (Logs folder in my website), but when I try to access the file via HTTP I get an error: The process cannot access the file 'foo' because it is being used by another process. Now, I know from experience that my service keeps the file locked for writing while it's running, but that I can still open the file in Notepad to view the current contents. (I'm surprised that IIS insists on write access, if that's what's happening). How can I get around that? Do I really have to write a handler to read the file and serve it to the browser myself? Or can I fix this with configuration or somesuch? PS. I'm using IIS7 if that helps.

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• Adding proper THEAD sections to a GridView

  - by Rick Strahl

  I’m working on some legacy code for a customer today and dealing with a page that has my favorite ‘friend’ on it: A GridView control. The ASP.NET GridView control (and also the older DataGrid control) creates some pretty messed up HTML. One of the more annoying things it does is to generate all rows including the header into the page in the <tbody> section of the document rather than in a properly separated <thead> section. Here’s is typical GridView generated HTML output: <table class="tablesorter blackborder" cellspacing="0" rules="all" border="1" id="Table1" style="border-collapse:collapse;"> <tr> <th scope="col">Name</th> <th scope="col">Company</th> <th scope="col">Entered</th><th scope="col">Balance</th> </tr> <tr> <td>Frank Hobson</td><td>Hobson Inc.</td> <td>10/20/2010 12:00:00 AM</td><td>240.00</td> </tr> ... </table> Notice that all content – both the headers and the body of the table – are generated directly under the <table> tag and there’s no explicit use of <tbody> or <thead> (or <tfooter> for that matter). When the browser renders this the document some default settings kick in and the DOM tree turns into something like this: <table> <tbody> <tr> <-- header <tr> <—detail row <tr> <—detail row </tbody> </table> Now if you’re just rendering the Grid server side and you’re applying all your styles through CssClass assignments this isn’t much of a problem. However, if you want to style your grid more generically using hierarchical CSS selectors it gets a lot more tricky to format tables that don’t properly delineate headers and body content. Also many plug-ins and other JavaScript utilities that work on tables require a properly formed table layout, and many of these simple won’t work out of the box with a GridView. For example, one of the things I wanted to do for this app is use the jQuery TableSorter plug-in which – not surprisingly – requires to work of table headers in the DOM document. Out of the box, the TableSorter plug-in doesn’t work with GridView controls, because the lack of a <thead> section to work on. Luckily with a little help of some jQuery scripting there’s a real easy fix to this problem. Basically, if we know the GridView generated table has a header in it, code like the following will move the headers from <tbody> to <thead>: <script type="text/javascript"> $(document).ready(function () { // Fix up GridView to support THEAD tags $("#gvCustomers tbody").before("<thead><tr></tr></thead>"); $("#gvCustomers thead tr").append($("#gvCustomers th")); $("#gvCustomers tbody tr:first").remove(); $("#gvCustomers").tablesorter({ sortList: [[1, 0]] }); }); </script> And voila you have a table that now works with the TableSorter plug-in. If you use GridView’s a lot you might want something a little more generic so the following does the same thing but should work more generically on any GridView/DataGrid missing its <thead> tag: function fixGridView(tableEl) {            var jTbl = $(tableEl);         if(jTbl.find("tbody>tr>th").length > 0) {         jTbl.find("tbody").before("<thead><tr></tr></thead>");         jTbl.find("thead tr").append(jTbl.find("th"));         jTbl.find("tbody tr:first").remove();     } } which you can call like this: $(document).ready(function () { fixGridView( $("#gvCustomers") ); $("#gvCustomers").tablesorter({ sortList: [[1, 0]] }); }); Server Side THEAD Rendering [updated from comments 11/21/2010] Several commenters pointed out that you can also do this on the server side by using the GridView.HeaderRow.TableSection property to force rendering with a proper table header. I was unaware of this option actually – not exactly an easy one to discover. One issue here is that timing of this needs to happen during the databinding process so you need to use an event handler: this.gvCustomers.DataBound += (object o, EventArgs ev) => { gvCustomers.HeaderRow.TableSection = TableRowSection.TableHeader; }; this.gvCustomers.DataSource = custList; this.gvCustomers.DataBind(); You can apply the same logic for the FooterRow. It’s beyond me why this rendering mode isn’t the default for a GridView – why would you ever want to have a table that doesn’t use a THEAD section??? But I disgress :-) I don’t use GridViews much anymore – opting for more flexible approaches using ListViews or even plain code based views or other custom displays that allow more control over layout, but I still see a lot of old code that does use them old clunkers including my own :) (gulp) and this does make life a little bit easier especially if you’re working with any of the jQuery table related plug-ins that expect a proper table structure.© Rick Strahl, West Wind Technologies, 2005-2010Posted in ASP.NET  jQuery  

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• Asp.Net MVC 2: How exactly does a view model bind back to the model upon post back?

  - by Dr. Zim

  Sorry for the length, but a picture is worth 1000 words: In ASP.NET MVC 2, the input form field "name" attribute must contain exactly the syntax below that you would use to reference the object in C# in order to bind it back to the object upon post back. That said, if you have an object like the following where it contains multiple Orders having multiple OrderLines, the names would look and work well like this (case sensitive): This works: Order[0].id Order[0].orderDate Order[0].Customer.name Order[0].Customer.Address Order[0].OrderLine[0].itemID // first order line Order[0].OrderLine[0].description Order[0].OrderLine[0].qty Order[0].OrderLine[0].price Order[0].OrderLine[1].itemID // second order line, same names Order[0].OrderLine[1].description Order[0].OrderLine[1].qty Order[0].OrderLine[1].price However we want to add order lines and remove order lines at the client browser. Apparently, the indexes must start at zero and contain every consecutive index number to N. The black belt ninja Phil Haack's blog entry here explains how to remove the [0] index, have duplicate names, and let MVC auto-enumerate duplicate names with the [0] notation. However, I have failed to get this to bind back using a nested object: This fails: Order.id // Duplicate names should enumerate at 0 .. N Order.orderDate Order.Customer.name Order.Customer.Address Order.OrderLine.itemID // And likewise for nested properties? Order.OrderLine.description Order.OrderLine.qty Order.OrderLine.price Order.OrderLine.itemID Order.OrderLine.description Order.OrderLine.qty Order.OrderLine.price I haven't found any advice out there yet that describes how this works for binding back nested ViewModels on post. Any links to existing code examples or strict examples on the exact names necessary to do nested binding with ILists? Steve Sanderson has code that does this sort of thing here, but we cannot seem to get this to bind back to nested objects. Anything not having the [0]..[n] AND being consecutive in numbering simply drops off of the return object. Any ideas?

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• Free solution for automatic updates with a .NET/C# app?

  - by a2h

  Yes, from searching I can see this has been asked time and time again. Here's a backstory. I'm an individual hobbyist developer with zero budget. A program I've been developing has been in need of constant bugfixes, and me and users are getting tired of having to manually update. Me, because my current solution of Manually FTP to my website Update a file "newest.txt" with the newest version Update index.html with a link to the newest version Hope for people to see the "there's an update" message Have them manually download the update sucks, and whenever I screw up an update, I get pitchforks. Users, because, well, "Are you ever going to implement auto-update?" "Will there ever be an auto-update feature?" Over the past I have looked into: WinSparkle - No in-app updates, and the DLL is 500 KB. My current solution is a few KBs in the executable and has no in-app updates. http://windowsclient.net/articles/appupdater.aspx - I can't comprehend the documentation http://www.codeproject.com/KB/vb/Auto_Update_Revisited.aspx - Doesn't appear to support anything other than working with files that aren't in use wyUpdate - wyBuild isn't free, and the file specification is simply too complex. Maybe if I was under a company paying me I could spend the time, but then I may as well pay for wyBuild. http://www.kineticjump.com/update/default.aspx - Ditto the last sentence. ClickOnce - Workarounds for implementing launching on startup are massive, horrendous and not worth it for such a simple feature. Publishing is a pain; manual FTP and replace of all files is required for servers without FrontPage Extensions. I'm pretty much ready to throw in the towel right now and strangle myself. And then I think about Sparkle... EDIT: I came across SparkleDotNET just then. Looks good, though the DLL is 200 KB. Don't know if that's really that big of an issue, though.

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• What are the limitations of the .NET Assembly format?

  - by McKAMEY

  We just ran into an interesting issue that I've not experienced before. We have a large scale production ASP.NET 3.5 SP1 Web App Project in Visual Studio 2008 SP1 which gets compiled and deployed using a Website Deployment Project. Everything has worked fine for the last year, until after a check-in yesterday the app started critically failing with BadImageFormatException. The check-in in question doesn't change anything particularly special and the errors are coming from areas of the app not even changed. Using Reflector we inspected the offending methods to find that there were garbage strings in the code (which Reflector humorously interpreted as Chinese characters). We have consistently reproduced this on several machines so it does not appear to be hardware related. Further inspection showed that those garbage strings did not exist in the Assemblies used as inputs to aspnet_merge.exe during deployment. Web Deployment Project Output Assemblies Properties: Merge all outputs to a single assembly Merge each individual folder output to its own assembly Merge all pages and control outputs to a single assembly Create a separate assembly for each page and control output In the web deployment project properties if we set the merge options to the first option ("Merge all outputs to a single assembly") we experience the issue, yet all of the other options work perfectly! So my question: does anyone know why this is happening? Is there a size-limit to aspnet_merge.exe's capabilities (the resulting merged DLL is around 19.3 MB)? Are there any other known issues with merging the output of WAPs? I would love it if any Assembly format / aspnet_merge gurus know about any such limitations like this. Seems to me like a 25MB Assembly, while big, isn't outrageous. Less disk to hit if it is all pregen'd stuff.

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• .NET: How do I know if I have an unmanaged resource?

  - by Shiftbit

  I've read that unmanaged resource are considered file handles, streams, anything low level. Does MSDN or any other source explain how to recognize an unmanaged resource? I can't seem to find any examples on the net that show unmanaged code, all the examples just have comments that say unmanaged code here. Can someone perhaps provide a realworld example where I would handle an unmanaged resources in an IDispose interface? I provided the IDisposable interface for your convience. How do I identify an unmanaged resource? Thanks in advance! IDisposable Reference Public Class Sample : Implements IDisposable Private disposedValue As Boolean = False 'To detect redundant calls ' IDisposable Protected Overridable Sub Dispose(ByVal disposing As Boolean) If Not Me.disposedValue Then If disposing Then ' TODO: free other state (managed objects). End If ' TODO: free your own state (unmanaged objects). ' TODO: set large fields to null. End If Me.disposedValue = True End Sub ' This code added by Visual Basic to correctly implement the disposable pattern. Public Sub Dispose() Implements IDisposable.Dispose ' Do not change this code. Put cleanup code in Dispose(ByVal disposing As Boolean) above. Dispose(True) GC.SuppressFinalize(Me) End Sub End Class

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• .Net: What is your confident approach in "Catch" section of try-catch block, When developing CRUD op

  - by odiseh

  hi, I was wondering if there would be any confident approach for use in catch section of try-catch block when developing CRUD operations(specially when you use a Database as your data source) in .Net? well, what's your opinion about below lines? public int Insert(string name, Int32 employeeID, string createDate) { SqlConnection connection = new SqlConnection(); connection.ConnectionString = this._ConnectionString; try { SqlCommand command = connection.CreateCommand(); command.CommandType = CommandType.StoredProcedure; command.CommandText = "UnitInsert"; if (connection.State != ConnectionState.Open) connection.Open(); SqlCommandBuilder.DeriveParameters(command); command.Parameters["@Name"].Value = name; command.Parameters["@EmployeeID"].Value = employeeID; command.Parameters["@CreateDate"].Value = createDate; int i = command.ExecuteNonQuery(); command.Dispose(); return i; } catch { **// how do you "catch" any possible error here?** return 0; // } finally { connection.Close(); connection.Dispose(); connection = null; } }

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• How to create minidump of a .NET process when a certain first chance exception occurs.

  - by mark

  Dear ladies and sirs. My application throws InvalidCastException in the QA environment, something I cannot reproduce in development. I wish to obtain the minidump at the exception moment. I know about adplus, but I am not sure how to use it so that it creates the minidump when InvalidCastException is thrown. Apparently, it does not distinguish one .NET exception from another. May be I am wrong and there is a way. Or, there is another tool to do it. Preferably free one. Anyway, can anyone advice how to handle this issue? Thanks. UPDATE The build is a Debug build in both QA and dev. However, QA runs complex scenarios made possible in the lab, which devs cannot reproduce. Hence I need an ability to make dump when running in QA. I can modify the code and create minidump from code. However, I wish for a more flexible solution, the one not requiring to modify the code every time an issue like this occurs.

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• dotnetopenauth with asp.net mvc proving too frustrating to use.

  - by Stacey

  I've been trying excessively hard to implement a good open id solution into asp.net mvc - and everywhere I turn is absolute dead ends. DotNetOpenAuth is just too big and I have been thusfar unable to get even the most simplistic, basic, absolute cut and dry implementation of it to work. NerdDinner had a promising implementation, but it is impossible to track down all of the dependant files and scripts. The DotNetOpenAuth website has virtually no information that helps, either, unfortunately. Does ANYONE know of a simple approach to just implementing this that actually explains and details how it is working with some kind of selector? It is talked about so much, but everything I find for it is so difficult to work with that it is really putting my whole team off from even considering it. We want to implement it similar to how stack overflow already does - using a selector that'll popup a login page if it needs to. I realize there is a lot of code that needs to be done for this, but everything just hails and praises dotnetopenauth, and nothing really teaches it. Even the sample projects do not open or compile. It looks like a wonderful library - but it really just isn't clicking for me.

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• .NET: What's the difference between HttpMethod and RequestType of HttpRequest?

  - by Ian Boyd

  The HttpRequest class defines two properties: HttpMethod: Gets the HTTP data transfer method (such as GET, POST, or HEAD) used by the client. public string HttpMethod { get; } The HTTP data transfer method used by the client. and RequestType: Gets or sets the HTTP data transfer method (GET or POST) used by the client. public string RequestType { get; set; } A string representing the HTTP invocation type sent by the client. What is the difference between these two properties? When would i want to use one over the other? Which is the proper one to inspect to see what data transfer method was used by the client? The documentation indicates that HttpMethod will return whatever verb was used: such as GET, POST, or HEAD while the documentation on RequestType seems to indicate only one of two possible values: GET or POST i test with a random sampling of verbs, and both properties seem to support all verbs, and both return the same values: Testing: Client Used HttpMethod RequestType GET GET GET POST POST POST HEAD HEAD HEAD CONNECT CONNECT CONNECT MKCOL MKCOL MKCOL PUT PUT PUT FOOTEST FOOTEST FOOTEST What is the difference between: HttpRequest.HttpMethod HttpRequest.RequestType and when should i use one over the other? Keywords: iis asp.net http httprequest httphandler

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• How to mock the Request.ServerVariables using MOQ for ASP.NET MVC?

  - by melaos

  hi guys, i'm just learning to put in unit testing for my asp.net mvc when i came to learn about the mock and the different frameworks there is out there now. after checking SO, i found that MOQ seems to be the easiest to pick up. as of now i'm stuck trying to mock the Request.ServerVariables, as after reading this post, i've learned that it's better to abstract them into property. as such: /// <summary> /// Return the server port /// </summary> protected string ServerPort { get { return Request.ServerVariables.Get("SERVER_PORT"); } } But i'm having a hard time learning how to properly mock this. I have a home controller ActionResult function which grabs the user server information and proceed to create a form to grab the user's information. i tried to use hanselman's mvcmockhelpers class but i'm not sure how to use it. this is what i have so far... [Test] public void Create_Redirects_To_ProductAdded_On_Success() { FakeViewEngine engine = new FakeViewEngine(); HomeController controller = new HomeController(); controller.ViewEngine = engine; MvcMockHelpers.SetFakeControllerContext(controller); controller.Create(); var results = controller.Create(); var typedResults = results as RedirectToRouteResult; Assert.AreEqual("", typedResults.RouteValues["action"], "Wrong action"); Assert.AreEqual("", typedResults.RouteValues["controller"], "Wrong controller"); } Questions: As of now i'm still getting null exception error when i'm running the test. So what am i missing here? And if i use the mvcmockhelpers class, how can i still call the request.verifyall function to ensure all the mocking are properly setup?

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• How to avoid chaotic ASP.NET web application deployment?

  - by emzero

  Ok, so here's the thing. I'm developing an existing (it started being an ASP classic app, so you can imagine :P) web application under ASP.NET 4.0 and SQLServer 2005. We are 4 developers using local instances of SQL Server 2005 Express, having the source-code and the Visual Studio database project This webapp has several "universes" (that's how we call it). Every universe has its own database (currently on the same server) but they all share the same schema (tables, sprocs, etc) and the same source/site code. So manually deploying is really annoying, because I have to deploy the source code and then run the sql scripts manually on each database. I know that manual deploying can cause problems, so I'm looking for a way of automating it. We've recently created a Visual Studio Database Project to manage the schema and generate the diff-schema scripts with different targets. I don't have idea how to put the pieces together I would like to: Have a way to make a "sync" deploy to a target server (thanksfully I have full RDC access to the servers so I can install things if required). With "sync" deploy I mean that I don't want to fully deploy the whole application, because it has lots of files and I just want to deploy those new or changed. Generate diff-sql update scripts for every database target and combine it to just 1 script. For this I should have some list of the databases names somewhere. Copy the site files and executing the generated sql script in an easy and automated way. I've read about MSBuild, MS WebDeploy, NAnt, etc. But I don't really know where to start and I really want to get rid of this manual deploy. If there is a better and easier way of doing it than what I enumerated, I'll be pleased to read your option. I know this is not a very specific question but I've googled a lot about it and it seems I cannot figure out how to do it. I've never used any automation tool to deploy. Any help will be really appreciated, Thank you all, Regards

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• Is it possible to update old database from dbml file ? (C#, .Net 4, Linq, SQL Server)

  - by Emil

  Hi all, I began recently a new job, a very interesting project (C#,.Net 4, Linq, VS 2010 and SQL Server). And immediately I got a very exciting challenge: I must implement either a new tool or integrate the logic when program start, or whatever, but what must happen is the following: the customers have previous application and database (full with their specific data). Now a new version is ready and the customer gets the update. In the mean time we made some modification on DB (new table, columns, maybe an old column deleted, or whatever). I’m pretty new in Linq and also SQL databases and my first solution can be: I check the applications/databases version and implement all the changes step by step comparing all tables, columns, keys, constrains, etc. (all this new information I have in my dbml and the old I asked from the existing DB). And I’ll do this each time the version changed. But somehow I feel, this is NOT a smart solution so I look for a general solution of this problem. Is there a way to update customers DB from the dbml file? To create a new one is not a problem (CreateDatabase with DataContext), is there any update/alter database methods? I guess I’m not the only one who search for such a solution (I found nothing in internet – or I looked for bad keywords). How did you solve this problem? I look also for an external tool, but first for a solution with C#, Linq or something similar. For any idea thank you in advance! Best regards, Emil

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• vb.net, How can I limit a textchanged event for a textbox to keyboard input only?

  - by Luay

  Hi everyone, Please allow me to explain what I have and what I am trying to achieve. I have a textbox (called txtb1) and a button under it (called btn_browse) on a winform in a vb.net project. When the user clicks the button a folder browser dialog appears. The user selects his desired folder and when he/she clicks 'ok' the dialog closes and the path of the folder selected appears in the textbox. I also want to store that value in a variable to be used somewhere else(the value will be copied to an xml file when the user clicks 'apply' on the form, but this has no effect nor is related to my problem). To achieve that I have the following code: Public myVar As String Private Sub btn_browse_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_browse.Click Dim f As New FolderBrowserDialog If f.ShowDialog() = DialogResult.OK Then txtb1.Text = f.SelectedPath End If myVar = txtb1.text f.Dispose() End Sub This part works with no problems. Now, what if the user either: 1- decides to enter the path manually rather than use the browse button. or, 2- after using the browse button and selecting the folder they decide to manually change the location In trying to solve this I added a textchanged event to the textbox as follows: Private Sub txtb1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtb1.TextChanged myVar = txtb1.Text End Sub However, this is not working. Apparently, and I don't know if this is relevant, when the user selects the desired folder using the browse button the textchanged event is also triggered. and when I click on the textbox (to give it focus) and press any keyboard key the application simply stops responding. So my questions are: am I going about this the right way? if my logic is flawed, could someone point me to how usually such a thing could be achieved? is it possible to limit the triggering events to only keyboard input as a way around this? I tried the keydown and keypress events but I am getting the freeze. I would be grateful for your help. Thanks

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• How do I import and call unmanaged C dll with ansi string "char *" pointer string from VB.net?

  - by Warren P

  I have written my own function, which in C would be declared like this, using standard Win32 calling conventions: int Thing( char * command, char * buffer, int * BufSize); I have the following amount of VB figured out, which should import the dll and call this function, wrapping it up to make it easy to call Thing("CommandHere",GetDataBackHere): Imports Microsoft.VisualBasic Imports System.Runtime.InteropServices Imports System Imports System.Text Namespace dllInvocationSpace Public Class dllInvoker ' tried attributes but could not make it build: ' <DllImport("Thing1.dll", False, CallingConvention.Cdecl, CharSet.Ansi, "Baton", True, True, False, True)> Declare Ansi Function Thing Lib "Thing1.dll" (ByVal Command As String, ByRef Buffer As String, ByRef BufferLength As Integer) Shared Function dllCall(ByVal Command As String, ByRef Results As String) As Integer Dim Buffer As StringBuilder = New StringBuilder(65536) Dim retCode As Integer Dim bufsz As Integer bufsz = 65536 retCode = Thing(Command, Buffer, bufsz) Results = Buffer Return retCode End Function End Class End Namespace The current code doesn't build, because although I think I should be able to create a "buffer" that the C Dll can write data back into using a string builder, I haven't got it quite right. (Value of type System.Text.STringBuilder cannot be converted to 'String'). I have looked all over the newsgroups and forums and can not find an example where the C dll needs to pass between 1 and 64kbytes of data back (char *buffer, int bufferlen) to visual basic.net.

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• How do I get LongVarchar out param from SPROC in ADO.NET 2.0 with SQLAnywhere 10?

  - by todthomson

  Hi All, I have sproc 'up_selfassessform_view' which has the following parameters: in ai_eqidentkey SYSKEY in ai_acidentkey SYSKEY out as_eqcomments TEXT_STRING out as_acexplanation TEXT_STRING  -  which are domain objects - SYSKEY is 'integer' and TEXT_STRING is 'long varchar'. I can call the sproc fine from iSQL using the following code: create variable @eqcomments TEXT_STRING; create variable @acexamples TEXT_STRING; call up_selfassessform_view (75000146, 3, @eqcomments, @acexamples); select @eqcomments, @acexamples;  - which returns the correct values from the DB (so I know the SPROC is good). I have configured the out param in ADO.NET like so (which has worked up until now for 'integer', 'timestamp', 'varchar(255)', etc): SAParameter as_acexplanation = cmd.CreateParameter(); as_acexplanation.Direction = ParameterDirection.Output; as_acexplanation.ParameterName = "as_acexplanation"; as_acexplanation.SADbType = SADbType.LongVarchar; cmd.Parameters.Add(as_acexplanation); When I run the following code: SADataReader reader = cmd.ExecuteReader(); I receive the following error: Parameter[2]: the Size property has an invalid size of 0. Which (I suppose) makes sense... But the thing is, I don't know the size of the field (it's just "long varchar" it doesn't have a predetermined length - unlike varchar(XXX)). Anyhow, just for fun, I add the following: as_acexplanation.Size = 1000; and the above error goes away, but now when I call: as_acexplanation.Value i get back a string of length = 1000 which is just '\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0...' (\0 repeated 1000 times). So I'm really really stuck... Any help one this one would be much appreciated. Cheers! ;) Tod T.

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• How to send complex types from PHP SoapClient to ASP.NET SOAP server?

  - by xaguilars

  Hello I'm having problems sending arrays, structs and arrays of structs from PHP to an ASP.NET SOAP server... Anyone have a sollution for this? I've googled for days and any sollution worked for me. Perphaps I'm forgetting something... There are examples of my code: $client = new SoapClient($options); $pCriteria = new stdClass(); $pCriteria->type=1; $pCriteria->capacity=4; //Test 1 (fail): $resp = $client->GetRooms(array("pCriteria"=>$pCriteria)); //Test 2 (fail): $resp = $client->GetRooms(array("pCriteria"=>new SoapVar($pCriteria, SOAP_ENC_OBJECT, "TCriteria", "http://www.w3.org/2001/XMLSchema"))); print_r($resp); I don't know how to code functions that require an array of TCriteria (TCriteria[], TCriteria_Array type) either... i've tried sending the raw array, a SoapVar with SOAP_ENC_ARRAY encoding and TCriteria_Array type, ... but it does not work (the SOAP server becomes unavaiable and needs to be restarted). I've tried creating classes for the complex types too, instead of stdClass, but not working. I don't know where's the problem. The server admins cannot help me and I haven't found any sollution over internet. I'm a bit desperate hehe. Can you help me please? Can you provide samples of code with the three cases (array of simple data, array of struct and struct) ? Thanks!

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• Problem in loading chart on the view in asp.net mvc?

  - by mary

  hello, I am working on the chart project in asp.net mvc. i used followinf code to genrate the chart on the controller. Chart chart1 = new Chart(); chart1.Height = 296; chart1.Width = 412; chart1.ImageType = ChartImageType.Png; Title title = chart1.Titles.Add("Main"); Series series1 = chart1.Series.Add("series1"); chart1.Series["series1"].Points.DataBindXY(xvalues, yvalues); chart1.Series["series1"].ChartType = SeriesChartType.Column ; ChartArea chartArea = chart1.ChartAreas.Add("Default"); chartArea.Area3DStyle.Enable3D = false ; MemoryStream ms = new MemoryStream(); chart1.SaveImage(ms); return File(ms.GetBuffer(), @"image/png"); and on the view page i am calling it as img src="/Home/SampleChart" alt="Sample Chart" when i am running it on local pc its working fine but when i deployed it on server then chart is not displaying instated alernate text is showing. and its not working on another pc also. plz if anyone can know the reson tell me. thank you.

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• Triple Quotes? How do I delimit a databound Javascript string parameter in ASP.NET?

  - by David HAust

  How do I delimit a Javascript databound string parameter in an anchor OnClick event? I have an anchor tag in an ASP.NET Repeater control. The OnClick event of the anchor contains a call to a Javascript function. The Javascript funciton takes a string for it's input parameter. The string parameter is populated with a databound value from the Repeater. I need the 'double quotes' for the Container.DataItem. I need the 'single quotes' for the OnClick. And I still need one more delimiter (triple quotes?) for the input string parameter of the Javascript function call. Since I can't use 'single quotes' again, how do I ensure the Javascript function knows the input parameter is a string and not an integer? Without the extra quotes around the input string parameter, the Javascript function thinks I'm passing in an integer. Cheers in advance for any knowledge you can drop. The anchor: <a id="aShowHide" onclick='ToggleDisplay(<%# DataBinder.Eval(Container.DataItem, "JobCode") %>);' >Show/Hide</a> and here is the Javascript: <script language="JavaScript" type="text/javascript">/* Shows/Hides the Jobs Div */ function ToggleDisplay(jobCode) { /* Each div has it's ID set dynamically ('d' plus the JobCode) */ var elem = document.getElementById('d' + jobCode); if (elem) { if (elem.style.display != 'block') { elem.style.display = 'block'; elem.style.visibility = 'visible'; } else { elem.style.display = 'none'; elem.style.visibility = 'hidden'; } } }</script>

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