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  • How do I validate a RadioButton on MVC?

    - by user54197
    I am using a client side validation and it is starting to get messy, considering I am making a form. With all the textbox and radio button validations, the controller will be overwhelmed. How do I validate and display the error Message for Radio Buttons and multiple textboxes in MVC on the MODEL side? A simplified version of what I have. MODEL... public class ModelData { public string ContactName { get; set; } public string ContactAddress { get; set; } public string ContactPhone { get; set; } public string RadioPoliceFire { get; set; } public string RadioComplaint { get; set; } //The following is a Failure :( public string RadioType { if (RadioType == null) {return "Type Required";} return null; } //End Failure } CONTROLLER... [AcceptVerbs(HttpVerbs.Post)] public ActionResult Info(ModelData InfoData) { if (infoData.RadioType == null) {ModelState.AddModelError("RadioType", "Type Required");} try { ... return RedirectToAction("Confirmation"); catch {ModelState.AddModelError("RadioComplaint", "Error");} }

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  • Unit testing a controller in ASP.NET MVC 2 with RedirectToAction

    - by Rob Walker
    I have a controller that implements a simple Add operation on an entity and redirects to the Details page: [HttpPost] public ActionResult Add(Thing thing) { // ... do validation, db stuff ... return this.RedirectToAction<c => c.Details(thing.Id)); } This works great (using the RedirectToAction from the MvcContrib assembly). When I'm unit testing this method I want to access the ViewData that is returned from the Details action (so I can get the newly inserted thing's primary key and prove it is now in the database). The test has: var result = controller.Add(thing); But result here is of type: System.Web.Mvc.RedirectToRouteResult (which is a System.Web.Mvc.ActionResult). It doesn't hasn't yet executed the Details method. I've tried calling ExecuteResult on the returned object passing in a mocked up ControllerContext but the framework wasn't happy with the lack of detail in the mocked object. I could try filling in the details, etc, etc but then my test code is way longer than the code I'm testing and I feel I need unit tests for the unit tests! Am I missing something in the testing philosophy? How do I test this action when I can't get at its returned state?

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  • MVP, WinForms - how to avoid bloated view, presenter and presentation model

    - by MatteS
    When implementing MVP pattern in winforms I often find bloated view interfaces with too many properties, setters and getters. An easy example with be a view with 3 buttons and 7 textboxes, all having value, enabled and visible properties exposed from the view. Adding validation results for this, and you could easily end up with an interface with 40ish properties. Using the Presentation Model, there'll be a model with the same number of properties aswell. How do you easily sync the view and the presentation model without having bloated presenter logic that pass all the values back and forth? (With that 80ish line presenter code, imagine with the presenter test that mocks the model and view will look like..160ish lines of code just to mock that transfer.) Is there any framework to handle this without resorting to winforms databinding? (you might want to use different views than a winforms view. According to some, this sync should be the presenters job..) Would you use AutoMapper? Maybe im asking the wrong questions, but it seems to me MVP easily gets bloated without some good solution here..

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  • Handle URI hacking gracefully in ASP.NET

    - by asbjornu
    I've written an application that handles most exceptions gracefully, with the page's design intact and a pretty error message. My application catches them all in the Page_Error event and there adds the exception to HttpContext.Curent.Context.Items and then does a Server.Transfer to an Error.aspx page. I find this to be the only viable solution in ASP.NET as there seems to be no other way to do it in a centralized and generic manner. I also handle the Application_Error and there I do some inspection on the exception that occurred to find out if I can handle it gracefully or not. Exceptions I've found I can handle gracefully are such that are thrown after someone hacking the URI to contain characters the .NET framework considers dangerous or basically just illegal at the file system level. Such URIs can look like e.g.: http://exmample.com/"illegal" http://example.com/illegal"/ http://example.com/illegal / (notice the space before the slash at the end of the last URI). I'd like these URIs to respond with a "404 Not Found" and a friendly message as well as not causing any error report to be sent to avoid DDOS attack vectors and such. I have, however, not found an elegant way to catch these types of errors. What I do now is inspect the exception.TargetSite.Name property, and if it's equal to CheckInvalidPathChars, ValidatePath or CheckSuspiciousPhysicalPath, I consider it a "path validation exception" and respond with a 404. This seems like a hack, though. First, the list of method names is probably not complete in any way and second, there's the possibility that these method names gets replaced or renamed down the line which will cause my code to break. Does anyone have an idea how I can handle this less hard-coded and much more future-proof way? PS: I'm using System.Web.Routing in my application to have clean and sensible URIs, if that is of any importance to any given solution.

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  • Generated signed X.509 client certificate is invalid (no certificate chain to its CA)

    - by Genady
    I use Bouncy Castle for generation of X.509 client certificates and sing them using a known CA. First I read the CA certificate from the certificate store, generate the client certificate, sign it using the CA. Validation of the certificate is failed doe to the following issue A certificate chain could not be built to a trusted root authority. As I understand this is due to the certificate not being related to the CA. Here is a code sample: public static X509Certificate2 GenerateCertificate(X509Certificate2 caCert, string certSubjectName) { // Generate Certificate var cerKp = kpgen.GenerateKeyPair(); var certName = new X509Name(true,certSubjectName); // subjectName = user var serialNo = BigInteger.ProbablePrime(120, new Random()); X509V3CertificateGenerator gen2 = new X509V3CertificateGenerator(); gen2.SetSerialNumber(serialNo); gen2.SetSubjectDN(certName); gen2.SetIssuerDN(new X509Name(true,caCert.Subject)); gen2.SetNotAfter(DateTime.Now.AddDays(100)); gen2.SetNotBefore(DateTime.Now.Subtract(new TimeSpan(7, 0, 0, 0))); gen2.SetSignatureAlgorithm("SHA1WithRSA"); gen2.SetPublicKey(cerKp.Public); AsymmetricCipherKeyPair akp = DotNetUtilities.GetKeyPair(caCert.PrivateKey); Org.BouncyCastle.X509.X509Certificate newCert = gen2.Generate(caKp.Private); // used for getting a private key X509Certificate2 userCert = ConvertToWindows(newCert,cerKp); if (caCert22.Verify()) // works well for CA { if (userCert.Verify()) // fails for client certificate { return userCert; } } return null; } private static X509Certificate2 ConvertToWindows(Org.BouncyCastle.X509.X509Certificate newCert, AsymmetricCipherKeyPair kp) { string tempStorePwd = "abcd1234"; var tempStoreFile = new FileInfo(Path.GetTempFileName()); try { // store key { var newStore = new Pkcs12Store(); var certEntry = new X509CertificateEntry(newCert); newStore.SetCertificateEntry( newCert.SubjectDN.ToString(), certEntry ); newStore.SetKeyEntry( newCert.SubjectDN.ToString(), new AsymmetricKeyEntry(kp.Private), new[] { certEntry } ); using (var s = tempStoreFile.Create()) { newStore.Save( s, tempStorePwd.ToCharArray(), new SecureRandom(new CryptoApiRandomGenerator()) ); } } // reload key return new X509Certificate2(tempStoreFile.FullName, tempStorePwd); } finally { tempStoreFile.Delete(); } }

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  • HL7 parsing in PHP

    - by Narcissus
    Hi all, I'm looking into options for parsing HL7 messages via PHP. I'm aware of the Net_HL7 package on PEAR but to be perfectly honest, I don't think that I want to base my code around a seemingly 'abandoned' package and even if I did, I just don't think that my brain suits the functions 'correctly'. Maybe if I had more of an HL7 background it would make a bit more sense, I don't know. Anyway: I'm guessing that 95% of the time, I'm going to be parsing and reading data from messages. The other 5%, I'll be creating and/or sending messages. I don't necessarily need to do any form of validation on the messages themselves, I just need to pull/push data. I definitely need support for 'non-XML' HL7 v2.x, but naturally XML-based v2 and v3 would be a bonus. So does anyone have any suggestions as to other libraries that I might use? I'm looking for pure PHP solutions as I want to have minimal requirements on the server that aren't "copy this directory here". Thanks!

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  • Redrawing rounded corners when using curvycorners-plugin for jQuery.

    - by timkl
    I'm using the curvycorners jQuery plugin (http://www.curvycorners.net/instructions/) to force IE to render rounded corners on divs. It works really well, apart from one thing: I have a validation error-message that pops up inside the div, using jQuery's "show" method. Curvycorners adds an extra div that is absolute positioned and has a set height, this means that you have to redraw the rounded corners if you want the containing div to resize when the error-message is shown. Curvycorners include a functions you can call to redraw the rounded corners, however it doesn't execute when I put it inside this click-function: $("input[type='submit']").click(function(e) { curvyCorners.redraw(); }); This is my markup: <fieldset class="curvyRedraw"> <legend>Some legend</legend> <form id="someForm"> <div id="error-message"></div> <div class="buttons"> <input type="submit" id="cancel" value="Cancel" name="action" /> <input type="submit" id="submit" value="Confirm" name="action" /> </div> </form> </fieldset> Anyone had similar issues?

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  • How to use HtmlEncode with TemplateFields, Data Binding, and a GridView

    - by Yadyn
    I have a GridView bound to an ObjectDataSource. I've got it supporting editing as well, which works just fine. However, I'd like to safely HtmlEncode text that is displayed as we do allow special characters in certain fields. This is a cinch to do with standard BoundFields, as I just set HtmlEncode to true. But in order to setup validation controls, one needs to use TemplateFields instead. How do I easily add HtmlEncoding to output this way? This is an ASP.NET 2.0 project, so I'm using the newer data binding shortcuts (e.g. Eval and Bind). What I'd like to do is something like the following: <asp:TemplateField HeaderText="Description"> <EditItemTemplate> <asp:TextBox ID="TextBoxDescription" runat="server" Text='<%# System.Web.HttpUtility.HtmlEncode(Bind("Description")) %>' ValidationGroup="EditItemGrid" MaxLength="30" /> <asp:Validator ... /> </EditItemTemplate> <ItemTemplate> <asp:Label ID="LabelDescription" runat="server" Text='<%# System.Web.HttpUtility.HtmlEncode(Eval("Description")) %>' /> </ItemTemplate> </asp:TemplateField> However, when I try it this way, I get the following error: CS0103: The name 'Bind' does not exist in the current context

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  • How to validate xml using a .dtd via a proxy and NOT using system.net.defaultproxy

    - by Lanceomagnifico
    Hi, Someone else has already asked a somewhat similar question: http://stackoverflow.com/questions/1888887/validate-an-xml-file-against-a-dtd-with-a-proxy-c-2-0/2766197#2766197 Here's my problem: We have a website application that needs to use both internal and external resources. We have a bunch of internal webservices. Requests to the CANNOT go through the proxy. If we try to, we get 404 errors since the proxy DNS doesn't know about our internal webservice domains. We generate a few xml files that have to be valid. I'd like to use the provided dtd documents to validate the xml. The dtd urls are outside our network and MUST go through the proxy. Is there any way to validate via dtd through a proxy without using system.net.defaultproxy? If we use defaultproxy, the internal webservices are busted, but the dtd validation works.# Here is what I'm doing to validate the xml right now: public static XDocument ValidateXmlUsingDtd(string xml) { var xrSettings = new XmlReaderSettings { ValidationType = ValidationType.DTD, ProhibitDtd = false }; var sr = new StringReader(xml.Trim()); XmlReader xRead = XmlReader.Create(sr, xrSettings); return XDocument.Load(xRead); } Ideally, there would be some way to assign a proxy to the XmlReader much like you can assign a proxy to the HttpWebRequest object. Or perhaps there is a way to programatically turn defaultproxy on or off? So that I can just turn it on for the call to Load the Xdocument, then turn it off again? FYI - I'm open to ideas on how to tackle this - note that the proxy is located in another domain, and they don't want to have to set up a dns lookup to our dns server for our internal webservice addresses. Cheers, Lance

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  • Does anyone use Fortify 360 with Classic ASP? a Header Manipulation vulnerability story

    - by j_green71
    Good morning, everyone. I'm on a short-term contracting gig, trying to patch some vulnerabilities in their legacy code. The application I'm working on is a combination of Classic ASP(VBScript) and .Net 2.0 (C#). One of the tools they have purchased is Fortify 360. Let's say that this is a current classic ASP page in the application: <%@ Language=VBScript %> <% Dim var var = Request.QueryString("var") ' do stuff Response.Redirect "nextpage.asp?var=" & var %> I know, I know, short and very dangerous. So we wrote some (en/de)coders and validation/verification routines: <%@ Language=VBScript %> <% Dim var var = Decode(Request.QueryString("var")) ' do stuff if isValid(var) then Response.Redirect "nextpage.asp?var=" & Encode(var) else 'throw error page end if %> And still Fortify flags this as vulnerable to Header Manipulation. How or what exactly is Fortify looking for? The reason I suspect that Fortify is looking for specific key words is that on the .Net side of things, I can include the Microsoft AntiXss assembly and call functions such as GetSafeHtmlFragment and UrlEncode and Fortify is happy. Any advice?

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  • Explicit casting doesn't work in default model binding

    - by Felix
    I am using ASP.NET MVC2 and Entity Framework. I am going to simplify the situation a little; hopefully it will make it clearer, not more confusing! I have a controller action to create address, and the country is a lookup table (in other words, there is a one-to-many relationship between Country and Address classes). Let's say for clarity that the field in the Address class is called Address.Land. And, for the purposes of the dropdown list, I am getting Country.CountryID and Country.Name. I am aware of Model vs. Input validation. So, if I call the dropdown field formLand - I can make it work. But if I call the field Land (that is, matching the variable in Address class) - I am getting the following error: "The parameter conversion from type 'System.String' to type 'App.Country' failed because no type converter can convert between these types." OK, this makes sense. A string (CountryID) comes from the form and the binder doesn't know how to convert it to Country type. So, I wrote the converter: namespace App { public partial class Country { public static explicit operator Country(string countryID) { AppEntities context = new AppEntities(); Country country = (Country) context.GetObjectByKey( new EntityKey("AppEntities.Countries", "CountryID", countryID)); return country; } } } FWIW, I tried both explicit and implicit. I tested it from the controller - Country c = (Country)"fr" - and it works fine. However, it never got invoked when the View is posted. I am getting the same "no type converter" error in the model. Any ideas how to hint to the model binder that there is a type converter? Thanks

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  • Defining reliable SIlverlight 4 architecture

    - by doteneter
    Hello everybody, It's my first question on SO. I know that there were many topics on Silverlight and architecture but didn't find answers that satisfies me. I'm ASP.NET MVC developer and are used to work on architectures built with the best practices (loose coupling with DI, etc.) Now I'm faced to the new Silverlight 4 project and would like to be sure I'm doing the best choices as I'm not experienced. Main features required by the applications are as follows : use existing SQL Server Database but with possibility to move to the cloud. using EF4 for the data acess with SQL Server. exitensibility : adding new modules without changing the main host. loose coupling. I was looking at different webcasts (Taulty, etc.), blogs about Silverlight and came up with the following architecture. EF 4 for data access (as specified with the requirements) WCF RIA Services for mid-tiers controling access to data for queries and enabling end-to-end support for data validation, authentication and roles. MEF Support for enabling modules. Unity 2.0 for DI. The problem is that I don't know how to define a reliable architecture where all these elements play well together. Should I use a framework instead like Prism or Caliburn? But for now I'm not sure what scenarios they support. What's the best usages for Unity in Silverlight ? I used to use IoC in ASP.NET MVC for loos coupling and other things like interception for audit logging. It seems that for Silverlight Unity doesn't support Interception. I would like to use it to enable loose coupling and to enable to move to the cloud if needed. Thanks in advance for your help.

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  • Why is Selenium RC so slow?

    - by Pete
    Hi. For some time I have been investigating Selenium RC in order to do functional testing of my web application. I have now found a test strategy that is so effective, that I do not want to move away from Selenium RC (after spending weeks trying to figure out a good way to validate ASP.NET validation controls). But now that my Selenium RC adventure is moving from a POC to be something that I actually use, I'm running into a problem. It is insanely slow. Executing a single test that loads a page, fills in some fields, and clicks a button takes in the magnitude of seconds to execute. When it is executing, I can easily see each individual field being filled out one at a time. Using Selenium IDE in Firefox is not that slow. I found this page, that clearly specifies that Selenium RC is slow http://selenium-grid.seleniumhq.org/how_it_works.html But why is that? Is it because the browser is polling the selenium server? If so, can this polling interval not be modified? Or is there another reason. I am not accustomed to a remote call taking a humanly noticable amount of time to execute. It is horrible that executing a few tests should take so long. I can execute my entire presentation (MVP), business, and database layer test suite (500+ tests) way quicker than it takes to run 10 tests for a single web page.

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  • 'ErrorMessageResourceType' property specified was not found. on XmlSerialise

    - by Redeemed1
    In my ASP.Net MVC app I have a Model layer which uses localised validation annotations on business objects. The code looks like this: [XmlRoot("Item")] public class ItemBo : BusinessObjectBase { [Required(ErrorMessageResourceName = "RequiredField", ErrorMessageResourceType = typeof(StringResource))] [HelpPrompt("ItemNumber")] public long ItemNumber { get; set; } This works well. When I want to serialise the object to xml I get the error: "'ErrorMessageResourceType' property specified was not found" (although it is lost beneath other errors, it is the innerexception I am trying to work on. The problem therefore is the use of the DataAnnotations attributes. The relevant resource files are in another assembly and are marked as 'public' and as I said everything works well until I get to serialisation. I have references to the relevant DataAnnotations class etc in my nunit tests and target class. By the way, the HelpPrompt is another data annotation I have defined elsewhere and is not causing the problem. Furthermore if I change the Required attribute to the standard format as follows, the serialisation works ok. [Required(ErrorMessage="Error")] Can anyone help me?

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  • GridView doesn't remember state between postbacks

    - by Ryan
    Hi, I have a simple ASP page with databound grid (bound to an object source). The grid is within the page of a wizard and has a 'select' checkbox for each row. In one stage of the wizard, I bind the GridView: protected void Wizard1_NextButtonClick(object sender, WizardNavigationEventArgs e) { ... // Bind and display matches GridViewMatches.EnableViewState = true; GridViewMatches.DataSource = getEmailRecipients(); GridViewMatches.DataBind(); And when the finish button is clicked, I iterate through the rows and check what's selected: protected void Wizard1_FinishButtonClick(object sender, WizardNavigationEventArgs e) { // Set the selected values, depending on the checkboxes on the grid. foreach (GridViewRow gr in GridViewMatches.Rows) { Int32 personID = Convert.ToInt32(gr.Cells[0].Text); CheckBox selected = (CheckBox) gr.Cells[1].FindControl("CheckBoxSelectedToSend"); But at this stage GridViewMatches.Rows.Count = 0! I don't re-bind the grid, I shouldn't need to, right? I expect the view-state to maintain the state. (Also, if I do rebind the grid, my selection checkboxes will be cleared) NB: This page also dynamically adds user controls in OnInit method. I have heard that it might mess with the view state, but as far as I can tell, I am doing it correctly and the viewstate for those added controls seems to work (values are persisted between postbacks) Thanks a lot in advance for any help! Ryan UPDATE: Could this be to do with the fact I am setting the datasource programatically? I wondered if the asp engine was databinding the grid during the page lifecycle to a datasource that was not yet defined. (In a test page, the GridView is 'automatically' databound'. I don't want the grid to re-bound I just want the values from the viewstate from the previous post! Also, I have this in the asp header: ViewStateEncryptionMode="Never" - this was to resolve an occasional 'Invalid Viewstate Validation MAC' message Thanks again Ryan

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  • SQL Injection Protection for dynamic queries

    - by jbugeja
    The typical controls against SQL injection flaws are to use bind variables (cfqueryparam tag), validation of string data and to turn to stored procedures for the actual SQL layer. This is all fine and I agree, however what if the site is a legacy one and it features a lot of dynamic queries. Then, rewriting all the queries is a herculean task and it requires an extensive period of regression and performance testing. I was thinking of using a dynamic SQL filter and calling it prior to calling cfquery for the actual execution. I found one filter in CFLib.org (http://www.cflib.org/udf/sqlSafe): <cfscript> /** * Cleans string of potential sql injection. * * @param string String to modify. (Required) * @return Returns a string. * @author Bryan Murphy ([email protected]) * @version 1, May 26, 2005 */ function metaguardSQLSafe(string) { var sqlList = "-- ,'"; var replacementList = "#chr(38)##chr(35)##chr(52)##chr(53)##chr(59)##chr(38)##chr(35)##chr(52)##chr(53)##chr(59)# , #chr(38)##chr(35)##chr(51)##chr(57)##chr(59)#"; return trim(replaceList( string , sqlList , replacementList )); } </cfscript> This seems to be quite a simple filter and I would like to know if there are ways to improve it or to come up with a better solution?

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  • Why use short-circuit code?

    - by Tim Lytle
    Related Questions: Benefits of using short-circuit evaluation, Why would a language NOT use Short-circuit evaluation?, Can someone explain this line of code please? (Logic & Assignment operators) There are questions about the benefits of a language using short-circuit code, but I'm wondering what are the benefits for a programmer? Is it just that it can make code a little more concise? Or are there performance reasons? I'm not asking about situations where two entities need to be evaluated anyway, for example: if($user->auth() AND $model->valid()){ $model->save(); } To me the reasoning there is clear - since both need to be true, you can skip the more costly model validation if the user can't save the data. This also has a (to me) obvious purpose: if(is_string($userid) AND strlen($userid) > 10){ //do something }; Because it wouldn't be wise to call strlen() with a non-string value. What I'm wondering about is the use of short-circuit code when it doesn't effect any other statements. For example, from the Zend Application default index page: defined('APPLICATION_PATH') || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application')); This could have been: if(!defined('APPLICATION_PATH')){ define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application')); } Or even as a single statement: if(!defined('APPLICATION_PATH')) define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application')); So why use the short-circuit code? Just for the 'coolness' factor of using logic operators in place of control structures? To consolidate nested if statements? Because it's faster?

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  • WPF: Textbox not firing onTextInput event

    - by Kay Ell
    So basically, I have a bunch of TextBoxes that the user gets to fill out. I've got a button that I want to keep disabled until all the TextBoxes have had text entered in them. Here is a sample XAML TextBox that I'm using: <TextBox Name="DelayedRecallScore" TextInput="CheckTextBoxFilled" Width="24" /> And here is the function that I'm trying to trigger: //Disables the OK button until all score textboxes have content private void CheckTextBoxFilled(object sender, RoutedEventArgs e) { /* foreach (TextBox scorebox in TextBoxList) { if (string.IsNullOrEmpty(scorebox.Text)) { Ok_Button.IsEnabled = false; return; } } Ok_Button.IsEnabled = true; */ MessageBox.Show("THIS MAKES NO SENSE"); } The MessageBox is not showing up when TextInput should be getting triggered. As an experiment I tried triggering CheckTextBoxFilled() on PreviewTextInput, and it worked fine then, meaning that for whatever reason, the function just isn't getting called. I also have a validation function that is triggered by PreviewTextInput, which works as it should. At first I thought PreviewTextInput might somehow be interfering with TextInput, so I took PreviewTextInput off the TextBox, but that hasn't managed to fix anything. I'm completely befuddled by why this might happen, so any help would be appreciated.

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  • Symfony forms question (restoring selected value of a dynamically populated sfWidgetFormSelect widge

    - by Stick it to THE MAN
    I am using Symfony 1.3.2 with Propel ORM on Ubuntu 9.10. I have developed a form that dynamically populates a select widget with cities in a selected country, using AJAX. Before the data entered on the form is saved, I validate the form. If validation fails, the form is presented back to the user for correction. However, because the country list is dynamically generated, the form that is presented for correction does not have a valid city selected (it is empty, since the country widget has not changed yet). This is inconvenient for the user, because it means they have to select ANOTHER country (so the change event is fired), and then change back to the original country they selected, then FINALLY select the city which they had last selected. All of this is forced on the user because another (possibly unrelated) field did not vaildate. I tried $form-getValue('widget_name'), called immediately after $form-bind(), but it seems (infact, IIRC, if form fails to validate, all the values are reset to null) - so that does not work. I am currently trying a nasty hack which involves the use of directly accesing the input (i.e. tainted) data via $_POST, and setting them into a flash variable - but I feel its a very nasty hack) What I'm trying to do is a common use case scenario - is there a better way to do this, than hacking around with $_POST etc?

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  • Db4o Mvc Application Architecture

    - by Mac
    I am currently testing out Db4o for an asp.net MVC 2 application idea but there are a few things I'm not quite sure on the best way to proceed. I want my application to use guessable routes rather than Id's for referencing my entities but I also think I need Id's of some sort for update scenarios. so for example I want /country/usa instead of /country/1 I may want to change the key name though (not perhaps on a country but on other entities) so am thinking I need an Id to use as the reference to retrieve the object prior to updating it's fields. From other comments it seems like the UUID is a bit long to be using and would prefer to use my own id's anyway for clean separation of concerns. Looking at both the KandaAlpha project I wasn't too keen on some aspects of the design and prefer something more along the lines of S#arp architecture where they use things like the [domainsignature] and EntityWithTypedId, IEntityDuplicateChecker, IHasAssignedId, BaseObject and IValidatable in their entities to control insert/update behaviour which seems cleaner and more extensible, covers validation and is encapsulated well within the core and base repository classes. So would a port of S#arp architecture to Db4o make sense of am I still thinking rmdbs in an oodb world? Also is there a best practice for managing indexes (including Unique ones as above) in Db4o? Should they be model metadata based and loaded using DI in a bootstrapper for example or should they be more loaded more like Automapper.CreateMap? Its a bit of a rambling question I know but any thoughts, ideas or suggested reading material is greatly appreciated. Thanks Mac

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  • Pass WPF UserControl reference to another UserControl

    - by Rob Bell
    I've created two UserControls, a ValidationManager and a ValidationOutput. On a given form there is one ValidationManager and several ValidationOutput controls, one for each control that is validated. The ValidationManager is given a list of validation errors when the form is submitted, I want each ValidationOutput control to look at this list and see if there are any errors relevant to them. The code looks a bit like this: <r:ValidationManager x:Name="myValidationManager" /> ... <TextBox Name="SomeField" /> <r:ValidationOutput FieldName="SomeField" /> I need to pass a reference to the ValidationManager to each of the ValidationOutput controls. I've added a ValidationManager property to the ValidationOutput UserControl but don't know how to pass the reference to the control. I've tried the following but am just clutching at straws: <r:ValidationOutput ValidationManager="myValidationManager" /> ...and... <r:ValidationOutput ValidationManager="{Binding myValidationManager}" /> The first results in an error "Property 'ValidationManager' was not found or is not serializable for type 'ValidationOutput'" and the second "A 'Binding' cannot be set on the 'ValidationManager' property of type 'ValidationControl'. A 'Binding' can only be set on a DependencyProperty of a DependencyObject."

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  • How do you keep your business rules DRY?

    - by Mario
    I periodically ponder how to best design an application whose every business rule exists in just a single location. (While I know there is no proverbial “best way” and that designs are situational, people must have a leaning toward one practice or another.) I work for a shop where they prefer to house as much of the business rules as possible in the database. This requires developers in many cases to perform identical front-end validations to avoid sending data to the database that will result in an exception—not very DRY. It grates me anytime I find myself duplicating any kind of logic—even lowly validation logic. I am a single-point-of-truth purist to an anal degree. On the other end of the spectrum, I know of shops that create dumb databases (the Rails community leans in this direction) and handle all of the business logic in a separate tier (in Rails the models would house “most” of this). Note the word “most” which implies that some business logic does end up spilling into other places (in Rails it might spill over into the controllers). In way, a clean separation of concerns where all business logic exists in a single core location is a Utopian fantasy that’s hard to uphold (n-tiered architecture or not). Furthermore, is see the “Database as a fortress” and would agree that it should be built on constraints that cause it to reject bad data. As such, I hold principles that cause a degree of angst as I attempt to balance them. How do you balance the database-as-a-fortress view with the desire to have a single-point-of-truth?

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  • Wpf Resource: "Unknown Build Error, 'Path cannot be null..."

    - by Femaref
    The following is a snippet from a xaml defining a DataGrid in a Control, defining a template selector. <DataGrid.Resources> <selector:CurrencyColorSelector x:Key="currencyColorSelector"> <selector:CurrencyColorSelector.NegativeTemplate> <DataTemplate> <TextBlock Text="{Binding Balance, StringFormat=n}" Background="Red"/> </DataTemplate> </selector:CurrencyColorSelector.NegativeTemplate> <selector:CurrencyColorSelector.NormalTemplate> <DataTemplate> <TextBlock Text="{Binding Balance, StringFormat=n}"/> </DataTemplate> </selector:CurrencyColorSelector.NormalTemplate> </selector:CurrencyColorSelector> </DataGrid.Resources> Now, an error is thrown: "Unknown build error, 'Path cannot be null. Parameter name: path Line 27 Position 79.'" (Compiler or xaml validation error). I have no idea where this Path comes from, neither does my example show anything of it. If you doubleclick the error, it points to the end of the first line. Did anybody encounter such a problem and has a solution for it? The example was from here: http://www.wpftutorial.net/DataGrid.html (Row Details depending on the type of data)

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  • extracting RDL data using LINQ

    - by BobC
    I'm working with some SQL Report definition files (RDLs), using LINQ to extract component query statements for validation. I'm trying to extract the <DataSet> elements from under the <DataSets> element. I seem to be getting hung up with one of the elements under <DataSet><Fields><Field> which has a namespace qualifier <rd:TypeName> I've been using LINQ to XML for other parts of the files where there is no namespace qualifiers with no trouble, by specifying a default namespace. The RDL specifies two namespaces: xmlns="http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition" xmlns:rd="http://schemas.microsoft.com/SQLServer/reporting/reportdesigner"> When I try to get the <DataSets> element, however, I get the following error: System.Xml.XmlException - The ':' character, hexadecimal value 0x3A, cannot be included in a name. I know it has to do with the namespace qualifier (rd:) in one of the child elements, but I'm having difficulty getting a LINQ expression that works. Any help would be appreciated. Thanks!

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  • Application Errors vs User Errors in PHP

    - by CogitoErgoSum
    So after much debate back and forth, I've come up with what I think may be a valid plan to handle Application/System errors vs User Errors (I.e. Validation Issues, Permission Issues etc). Application/System Errors will be handled using a custom error handler (via set_error_handler()). Depending on the severity of the error, the user may be redirected to a generic error page (I.e. Fatal Error), or the error may simply be silently logged (i.e E_WARNING). These errors are ones most likely caused by issues outside the users control (Missing file, Bad logic, etc). The second set of errors would be User Generated ones. These are the ones may not automatically trigger an error but would be considered one. In these cases i"ve decided to use the trigger_error() function and typically throw a waning or notice which would be logged silently by the error handler. After that it would be up to the developer to then redirect the user to another page or display some sort of more meaningful message to the user. This way an error of any type is always logged, but user errors still allow the developer freedom to handle it in their own ways. I.e. Redirect them back to their form with it fully repopulated and a message of what went wrong. Does anyone see anything wrong with this, or have a more intuitive way? My approach to error handling is typically everyone has their own ways but there must be a way instituted.

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