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• System.Web.Security.FormsAuthentication.Encrypt returns null

  - by Mustafakidd

  I'm trying to encrypt some userData to create my own custom IPrincipal and IIdentity objects using Forms authentication - I've serialized an object representing my logged in user to Json and created my FormsAuthentication ticket like so: string user_item = GetJsonOfLoggedinUser();/*get JSON representation of my logged in user*/ System.Web.Security.FormsAuthenticationTicket ticket = new System.Web.Security.FormsAuthenticationTicket(1, WAM.Utilities.SessionHelper.LoggedInEmployee.F_NAME + " " + WAM.Utilities.SessionHelper.LoggedInEmployee.L_NAME, DateTime.Now, DateTime.Now.AddMinutes(30), false, user_item); string encrypted_ticket = System.Web.Security.FormsAuthentication.Encrypt(ticket); HttpCookie auth_cookie = new HttpCookie( System.Web.Security.FormsAuthentication.FormsCookieName, encrypted_ticket); Response.Cookies.Add(auth_cookie); However, the string encrypted_ticket is always null. Is there a limit on the length of the user_item string? Thanks Mustafa

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• WCF ValidationFault

  - by RandomNoob

  I'm using Validation Application Block - Enterprise Library to validate parameters sent to my WCF Service operations. For instance, a certain operation requires the parameter to either be a 1 or 6, like so: [OperationContract(Name="GetEmployeesByRegion")] [FaultContract(typeof(ValidationFault))] List<Employees> GetEmployeesByRegion([DomainValidator(1,6)]int regionId); This works just fine i.e the validation fault occurs however, when the service is invoked by the client, a generic System.ServiceModel.FaultException is thrown. An the message indicates: "The creator of this fault did not specify a reason." Now, I could check the parameters myself before the service cal and throw a custom fault but that seems to defeat the purpose of attribute based validation of parameters using the Validation Application Block. Is there anyway to customize the error returned by the validation Fault? It is also possible I'm doing something completely wrong. I just want the caller to know that he/she should have passed in a 1 or 6 in the exception message. Is this possible?

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• PerWebRequest LifetimeManager and Beyond (Asp.net Mvc)

  - by Soe Moe

  Hi, Currently, I created my custom PerWebRequestLifetimeManager using HttpContext.Current.Items as backing store. I used that lifetime manager for Linq2Sql DataContext. Eveything is working fine until I need to use Cache for storing data (for 5 min). After 5 min, I need to retrieve data from DB and put it into the Cache. To do so, I need to use Linq2Sql DataContext for retrieving data. But during that time, HttpContext.Current is null because which was happened when cache is expired; not in Web Request. So, what kind of LifetimeManager should I use for this scenario? Thanks in advance.

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• Annotating axis in ggplot2

  - by mpiktas

  I am looking for the way to annotate axis in ggplot2. The example of the problem can be found here: http://learnr.wordpress.com/2009/09/24/ggplot2-back-to-back-bar-charts. The y axis of the chart (example graph in the link) has an annotation: (million euro). Is there a way to create such types of annotations in ggplot2? Looking at the documentation there is no obvious way, since the ggplot does not explicitly let you put objects outside plotting area. But maybe there is some workaround? One of the possible workarounds I thought about is using scales: data=data.frame(x=1:10,y=1:10) qplot(x=x,y=y,data=data)+scale_y_continuous(breaks=10.1,label="Millions") But then how do I remove the tick? And it seems that since ggplot does not support multiple scales, I will need to grab the output of the scale_y_continuous, when it calculates the scales automaticaly and then add my custom break and label by hand. Maybe there is a better way?

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• How to handle Booleans/CheckBoxes in ASP.NET MVC 2 with DataAnnotations?

  - by asp_net

  I've got a view model like this: public class SignUpViewModel { [Required(ErrorMessage = "Bitte lesen und akzeptieren Sie die AGB.")] [DisplayName("Ich habe die AGB gelesen und akzeptiere diese.")] public bool AgreesWithTerms { get; set; } } The view markup code: <%= Html.CheckBoxFor(m => m.AgreesWithTerms) %> <%= Html.LabelFor(m => m.AgreesWithTerms)%> The result: No validation is executed. That's okay so far because bool is a value type and never null. But even if I make AgreesWithTerms nullable it won't work because the compiler shouts "Templates can be used only with field access, property access, single-dimension array index, or single-parameter custom indexer expressions." So, what's the correct way to handle this?

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• How to add icons to a PopUpMenuButton in Flex 3 using an XML file

  - by user168610

  Hi, I've been looking at the following example for populating a PupUpMenuButton http://blog.flexexamples.com/2008/02/21/creating-a-custom-label-function-on-a-flex-popupmenubutton-control/ and would like to add icons to each menu. Ideally, I would specify the icon in the xml and assign it in a similar way to using labelFunction for the text. I'm pretty new to Flex and would appreciate some guidance with this. The only information I've found via google is to create a menu as follows (seems I can't include more than one url, but it is an example that creates a menu object using the following function): private function initMenu():void { menu = new Menu(); menu.dataProvider = xmlList; menu.labelField = "@label"; menu.iconField = "@icon"; } but I would really prefer to build it all from the XML file. Many thanks, Bryn

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• Tutorial: Simple WCF XML-RPC client

  - by mr.b

  Update: I have provided complete code example in answer below. I have built my own little custom XML-RPC server, and since I'd like to keep things simple, on both server and client side, what I would like to accomplish is to create a simplest possible client (in C# preferably) using WCF. Let's say that Contract for service exposed via XML-RPC is as follows: [ServiceContract] public interface IContract { [OperationContract(Action="Ping")] string Ping(); // server returns back string "Pong" [OperationContract(Action="Echo")] string Echo(string message); // server echoes back whatever message is } So, there are two example methods, one without any arguments, and another with simple string argument, both returning strings (just for sake of example). Service is exposed via http. Aaand, what's next? :)

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• What is the correct Qt idiom for exposing signals/slots of contained widgets?

  - by Tyler McHenry

  Suppose I have a MyWidget which contains a MySubWidget, e.g. a custom widget that contains a text field or something. I want other classes to be able to connect to signals and slots exposed by the contained MySubWidget instance. Is the conventional way to do this: Expose a pointer to the MySubWidget instance through a subWidget() method in MyWidget Duplicate the signals and slots of MySubWidget in the MyWidget class and write "forwarding" code Something else? Choice 1 seems like the least code, but it also sort of breaks encapsulation, since now other classes know what the contained widgets of MyWidget are and might become dependent on their functionality. Choice 2 seems like it keeps encapsulation, but it's a lot of seemingly redundant and potentially convoluted code that kind of messes up the elegance of the whole signals and slots system. What is normally done in this situation?

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• Automapper Type Converter from String to IEnumerable<String> is not being called

  - by Anton

  Here is my custom Type Converter. public class StringListTypeConverter : TypeConverter<String, IEnumerable<String>> { protected override IEnumerable<string> ConvertCore(String source) { if (source == null) yield break; foreach (var item in source.Split(',')) yield return item.Trim(); } } public class Source { public String Some {get;set;} } public class Dest { public IEnumerable<String> Some {get;set;} } // ... configuration Mapper.CreateMap<String, IEnumerable<String>>().ConvertUsing<StringListTypeConverter>(); Mapper.CreateMap<Source, Dest>(); The problem: StringListTypeConverter is not being called at all. Dest.Some == null.

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• UIScrollView subviews not showing at first

  - by igul222

  I created a custom UIScrollView subclass that works a like a UITableView, keeping a collection of subviews and re-using them whenever the user scrolls. It's implemented like this: -(void)layoutSubviews { for(UIView *subview in [self subviews]) [subview removeFromSuperview]; // then re-add subviews after changing the frame and some attributes } This works fine with simple UIViews, but when I try to do it with a UIView that has a UILabel subview, the "base" view appears fine, but the UILabel doesn't show up at all. I can get the UILabel to show up by scrolling the entire UIView off screen and then bringing it back on. What could be causing this? So far, I've tried calling [myUIView setNeedsLayout], [myUIView setNeedsDisplay], and [myUIView layoutIfNeeded] from various places. None of them worked, and the last one crashed my app. I've also done the same thing to myUIScrollViewSubclass, with similar results.

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• Arguments of using WCF/OData as access layer instead of EF/L2S/nHibernate directly

  - by Carl Hörberg

  We develop mostly low traffic but highly specialized web applications. Normally we use L2S, EF or nHibernate as access layer and then throws Asp.Net MVC to it and in which for normal crud operations we query the ISession/DataContext directly but for more advanced functions/side effects we put it in a some kind of service layer. Now, i was think about publishing the data through OData (WCF Data Service) and query that from the controllers (or even from jQuery when the a good template engine shows up) and publish the service operations through a WCF service (or as custom methods on the WCF Data Service?). What advantages/disadvantages does this architecture poses? Do I gain something except higher complexity and latency? Better separations of concerns (or is it just a illusion)?

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• Adobe Flex Datagrid: addEventListener MouseEvent.CLICK

  - by JonoB

  I have a datagrid with a custom label itemrenderer (basically it makes the label look like a traditional html hyperlink). <mx:DataGridColumn id="itemId"> <mx:itemRenderer> <mx:Component> <controls3:HyperlinkLabel text="{data.doc}" /> </mx:Component> </mx:itemRenderer> </mx:DataGridColumn> The above works perfectly. I'd like to try add an event listener to this itemrenderer, but I'm not sure how to do this given that I cant specify an id for the itemrendered itself. I tried the following, but it doesnt seem to work: itemId.addEventListener(MouseEvent.CLICK, onItemSelect);

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• ASP.Net Application Trust Medium File IO Outside Virtual Directory

  - by Trey Gramann

  I am trying to determine how suicidal this is... I have a hosting environment where a custom ASP.Net CMS application needs to access the files in the root folder of a website even though it is in a virtual folder so it can be shared accross many sites. I can modify the Medium trust on the server and came up with this... <IPermission class="FileIOPermission" version="1" Read="$AppDir$;$AppDir$\.." Write="$AppDir$;$AppDir$\.." Append="$AppDir$;$AppDir$\.." PathDiscovery="$AppDir$;$AppDir$\.."/> Oddly enough, it works. Yes, I understand it is doing this for all the Apps. I am a bit at a loss as to easy ways to test what else is being exposed. Feels dangerous. Opinions?

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• Styling hyperlink button inside a data template in Silverlight

  - by cmaduro

  How do I change the visual state of a hyperlinkbutton inside a datatemplate? In short, what I'm doing is basically I'm trying to iterate of the hyperlinkbuttons and set their visual state to active or inactive according to the url. The hyperlink buttons are located inside the datatemplate of an itemscontrols itemsource that is bound to a List where link is my custom class for links. Is there a best practice for styling the active hyperlink in a silverlight nav app? What I am using is the approach of the boilerplate code.

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• PropertyGrid PaintValue problem: How to remove (and paint outside) the standard rectangle?

  - by Pedery

  This might be a straightforward question, even though I haven't found an easy solution to it: I've implemented my custom UITypeEditor with the sole purpose of adding a PaintValue to bools. For the sake of the discussion, let's assume that PaintValue will either paint a checked or unchecked radiobutton. Question 1: Now, here's the problem: It seems like PaintValue automatically inserts a 20x13px rectangle after all paint code has completed. Naturally, a radiobutton inside a black rectangle is ugly. Can I easily instruct or override this rectagle not to be painted? Question 2: In this respect, is it possible to paint on top of the propertygrid's native look - meaning could I paint something in order to obscure (part of) the black line separating two grid cells vertically? The purpose of doing this would be to indicate that two values were linked, like constrained width/height to an aspect ratio.

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• JDBC: What is the correct JDBC URL to connect to a RAC database

  - by Vinnie

  Hi, We were connecting to Oracle from our code with a simple (custom) JDBC connector class. This class reads the connection properties from a resource file and tries to make a connection to Oracle (thin connection). However, recently the database have moved to a RAC and now the application is unable to connect to the DB. Here is the TNSPING output: Used LDAP adapter to resolve the alias Attempting to contact (DESCRIPTION=(ADDRESS_LIST=(LOAD_BALANCE=OFF)(FAILOVER=ON) (ADDRESS=(PROTOCOL=TCP)(HOST=tst-db1.myco.com)(PORT=1604)) (ADDRESS=(PROTOCOL=TCP)(HOST=tst-db2.myco.com)(PORT=1604)))(CONNECT_DATA= SERVICE_NAME=mydb1.myco.com)(SERVER=DEDICATED))) OK (80 msec) What would be the correct URL to specify in this case. Regards, Ashish

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• jQuery not loading on Master Page when the Content Page is in a child folder.

  - by ProfK

  I have a site where I am trying to implement a jQuery UI based MessageBox in my master page. Content pages are arranged accoring to business area folders, i.e. '~/Branding/Contracts.aspx'. I find that when I load such a content page, jQuery, which is referenced in the master page as below, does not load. I assume that this is because the browser is requesting 'Branding/Scripts/jQuery '. What can I do about this? I don't have the 'root' operator in a plain 'script' tag. <script src="/Scripts/jquery-1.3.2.js" type="text/javascript"></script> <script src="Scripts/jquery-1.3.2.js" type="text/javascript"></script> <script src="Scripts/jquery-ui-1.7.2.custom.min.js" type="text/javascript"></script>

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• Can iTextSharp rasterize/export to JPEG or other image format?

  - by SkippyFire

  I need to be able to export PDF's that I am creating to JPEG, so that users can have a screenshot/thumbnail of the end product, which is faster than opening the whole PDF. I am running this on an ASP.NET website running in Medium Trust in the Rackspace Mosso Cloud. I have yet to find a library that will either work in Medium trust, or in the case of ABC PDF, which works great locally, wont load in Mosso. Maybe Mosso has a custom trust level? I know that iTextSharp works on Mosso, but I haven't been able to figure how to "screenshot" a single page of a PDF, or export a page to JPEG. Is there anyone out there who has done this before?

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• Validation in asp.net MVC - validation only to happen when "asked"

  - by jeriley

  I've got a slightly different validation requirement than the usual "when save, validate!". The system can allow someone to update a bunch of times without being "bothered" with a validation listing UNTIL they say it's complete. I thought I might be able to pull a fast one and put the [HandleError] on the method of which this would fire, but that validates every save. Is there an attribte I can put into my custom validator that can handle this or am I going to have to write up my own HandleError attribute?

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• rsRenderingExtensionNotFound error using SSRS 2005

  - by Fermin

  Hi, I am trying to use the Sharp-shooter Silverlight report viewer control. This control has a server side component that renders the reports as XAML for displaying in the client side control. I have tried manually installing the rendering extension, according to the instructions on their website, and also the instructions on MSDN. I have basically copied the dll's into the reporting services bin folder and added the following line to rsreportserver.config file: <Extension Name="XAML" Type="PerpetuumSoft.ReportingService.XamlRendering.XamlRenderer,PerpetuumSoft.ReportingService.XamlRendering"/> I've also added a line into the rssrvpolicy.config file as specified on their site. After I made these changes I went into windows services and restarted the Reporting Services services but I get the following error when I try to run reports: rsRenderingExtensionNotFound: An attempt has been made to use a rendering extension that is not registered for this report server Is there anything else that I need to do to use a custom rendering extension within SSRS 2005?

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• Is it possible to get Cufon to work on a button?

  - by Tom Harvey

  So right now I'm bashing my head - at the moment we use an element for a button to give it our own custom font, fine - this works, but as we're using Cufon on the rest of the site, we're wondering if it's possible to get Cufon working on a button. So far I've changed the button to an and using standard css styles on an 'input' or 'input[type="submit"]' element work fine - but I've tried both of these in cufon to no avail. This is a button - so as Cufon generates images, this should work, but maybe I'm doing it wrong - can anyone help?

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• Resolving IEnumerable<T> with Unity

  - by Mark Seemann

  Can Unity automatically resolve IEnumerable<T>? Let's say I have a class with this constructor: public CoalescingParserSelector(IEnumerable<IParserBuilder> parserBuilders) and I configure individual IParserBuilder instances in the container: container.RegisterType<IParserSelector, CoalescingParserSelector>(); container.RegisterType<IParserBuilder, HelpParserBuilder>(); container.RegisterType<IParserBuilder, SomeOtherParserBuilder>(); can I make this work without having to implement a custom implementation of IEnumerable<IParserBuilder>? var selector = container.Resolve<IParserSelector>(); So far I haven't been able to express this in any simple way, but I'm still ramping up on Unity so I may have missed something.

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• robocode engine: how to design (write) the runtime engine -- the robot world

  - by Bob

  IBM has (had) a free learn-Java program called RoboCode, in which custom robots could be written that would then do battle in a 2D space. I would like to write the environment that supports such robots, but don't know what pattern or design to use. Each robot is a thread. Each thread is given a certain (indeterminate) amount of run-time by the JRE. A robot world engine would start by building a list of the players/robots, then enter a loop that allows each player in turn to do whatever it likes: move forward, turn left, fire toward the northwest corner, whatever. Each robot is also informed of events of interest: an enemy or several enemies are within range, it has been hit by a bullet, etc. The combination of handling threads that are also event listeners (are they also producers?) confuses me; it seems that there's more to the game engine. Even some general ideas would help. TIA.

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• wpf binding by selected value - swap out bound object without disturbing binding

  - by Andy Clarke

  Hi, I've got combo box bound to a custom collection type - its basically an overridden ObservableCollection which I've added a facility to update the underlying collection (via Unity). I don't want to confuse the issue too much, but thats the background. My xaml looks like this <ComboBox ItemsSource="{Binding Manufacturers}" DisplayMemberPath="Name" SelectedValuePath="ID" SelectedValue="{Binding Vehicle.ManufacturerID}" /> And in my overridden collection i was doing this. index = IndexOf(oldItem); Insert(index, (T)newItem); RemoveAt(index + 1); I had hoped because it was bound by value, that inserting the new object(which had the same id) and then removing the old one would work. But it seems that although its bound by SelectedValue it still knows that its being swapped for a different one. The combo just looses its selection. Can anyone help please?

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• Email attachment parsing via mime4j

  - by Ashish

  Hi, I am using a small java smtp library (http://code.google.com/p/subethasmtp/), by this I need to parse the incoming emails in separate components viz body, attachments etc. I am trying to use mime4j , but the documentation suggests that mime4j can only give event notification or token notification and nothing else. For stripping out body and attachments etc I had to use my own custom logic inside the event handlers. Is my observation correct? If yes then how can I use mime4j to use for my requirement. Please suggest. I badly need an approach that takes in the smtp data stream and returns me with an array of attachment references or streams in fully parsed out form in java. Please help. Thanks in advance Ashish Sharma

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