asp mvc - Page 18 - Developer IT

ASP.NET MVC 2.0 Client-Side Validation HOWTO

- by AlexWalker

Where can I find some good information on the new client-side validation functionality included in ASP.NET MVC v2? I'd like to find information about using the client-side validation JavaScript without using DataAnnotations, and I'd like to find out how custom validations are handled. For example, if I want to validate two fields together, how would I utilize the provided JavaScript? Or if I wanted to write validation code on the server-side that queried a database, how could I use the provided JavaScript to implement a similar validation? I don't see any books on MVC2 yet, and the blog entries I've found are not detailed enough.

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[C# asp.net mvc or javascript] user-friendly xml sensitization library that html encoding invalid pa

- by Fox

I would like to allow my users to submit a subset of xhtml that will be displayed to other users (likely I'll build a schema for it) but I want the server to handle validation more gracefully then hard rejecting invalid submissions.... Instead I'd like the server to Html Encode invalid/harmful parts of the submissions.... (sanitize javascript and css etc.) Is there any library (maybe asp.net mvc 2 has such functionality?) or do I have to develop my own? or maybe there is a javascript library that html encodes invalid parts and I can just have the server only accept that subset?

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Rendering PDFs from a database inside MVC views?

- by Mohammad Sepahvand

I was wondering if it's possible to do this without using 3rd party compnents in MVC 3. (I am open to free components though.) There are a couple of links out there but they seem to be mostly concerned with reporting and other code samples that do claim to do this sort of thing don't seem to compile. I'm not having any trouble saving and retrieving the PDFs to and from my database, but when I return the PDF as a File or a FileStreamResult the user is prompted with a download. A more desirable approach would be to actually render the PDFs inside the browser. I've had a look at iTextSHarp, it does the job to an extent, but it's not a complete solution. For example it will display the PDF inside the view if and only if the client has Adobe Reader installed, otherwise it prompts for a download. So technically, I'm mostly looking for a PDF viewer. Any ideas?

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How can I implement my own version of a MVC framework in ASP.NET?

- by ace

Hi - I would like to know how I can go about implementing my own version of a MVC framework in ASP.NET? I know there already is Microsoft provided ASP.NET MVC framework, but I want to learn MVC and thought the best way would be to implement my own flavor of a MVC framework on top of ASP.NET. Any thoughts / guidance ? Also, can anyone point me to a page where I can learn more about how microsoft implemented ASP.NET MVC ? I'm more interested in learning about the under the hood plumbing that goes on to implement the framework on top of asp.net, do they use HttpHandlers / HttpModules ? Thanks.

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Retreive value from model into view ib MVC 3

- by prerna

public class HomeController : Controller { public ActionResult Index() { return View(); } /* public string Browse() { return "Hello from Browse"; public string Details(int id) { string message = "Store.Details, ID = " + id; return message; // return "Hello from Details"; }*/ public ActionResult Details(int id) { var album = new Album { Title = "Album " + id }; return View(album); } } I am new to MVC 3 ,My View is Details.aspx without Razor engine. <html> <head runat="server"> <title>Details</title> </head> <body> <div> </div> </body> </html> Can anyone help

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Proxy object references in MVC code

- by krystan honour

Hi there, I am just figuring out best practice with MVC now I have a project where we have chosen to use it in anger. My question is. If creating a list view which is bound to an IEnumerable is this bad practise? Would it be better to seperate the code generated by the WCF Service reference into a datastructure which essentially holds the same data but abstracts further from the service, meaning that the UI is totally unaware of the service implementation beneath. or do people just bind to the proxy object types and have done with it ? My personal feeling is to create an abstraction but this seems to violate the DRY principle.

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Page inheritance in mixed asp.net Forms and MVC application

- by Rising Star

I'm working on a web application. One of my co-workers has written some asp.net forms pages. The page classes all inherit from BasePageClass, which of course inherits from the Page class. I wish to add some MVC controllers that I've been told need to use the same logic implemented in the BasePageClass. Ordinarily, I would want to inherit the functions in the BasePageClass in the controller classes, but this breaks the inheritance heirarchy. What is the best practice for solving this problem?

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routing paramenter returns null when only supplying first paramenter in MVC

- by Ray ForRespect

My issue is that I customer Map Route in MVC which takes three parameters. When I supply all three or just two, the parameters are passed from the URL to my controller. However, when I only supply the first parameter, it is not passed and returns null. Not sure what causes this behavior. Route: routes.MapRoute( name: "Details", // Route name url: "{controller}/{action}/{param1}/{param2}/{param3}", // URL with parameters defaults: new { controller = "Details", action = "Index", param1 = UrlParameter.Optional, param2 = UrlParameter.Optional, param3 = UrlParameter.Optional } // Parameter defaults ); Controller: public ActionResult Map(string param1, string param2, string param3) { StoreMap makeMap = new StoreMap(); var storemap = makeMap.makeStoreMap(param1, param2, param3); var model = storemap; return View(model); } string param1 returns null when I navigate to: /StoreMap/Map/PARAM1NAME but it doesn't return null when I navigate to: /StoreMap/Map/PARAM1NAME/PARAM2NAME

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MVC Display Template for Generic Type

- by Kyle

I am trying to use the model ListModel as a generic list model. I would like to enter on the page @Html.DisplayForModel() However the MVC is not correctly finding the templated file "ListModel.cshtml". It must work differently for generic models. What should I name the templated file in order for it to correctly be located? public class ListModel<T> { public IEnumerable<T> Models {get;set;} public string NextPage {get;set;} } I would expect it to look for "Shared/DisplayTemplates/ListModel.ascx" but it doesn't. Does anyone know?

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Traditional ASP.NET application in subdirectory of an MVC application

- by David

Windows Server 2003, IIS6. We're trying to deploy a non-MVC ASP.NET web application as a subdirectory of an MVC application. However the ASP.NET application in the subdirectory is failing with the message "Could not load file or assembly 'System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified." which is bizarre because it's not an MVC application.

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How to create Ror style Restful routing in Asp.net MVC Web Api

- by Jas

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ASP and Windows User Logon

- by Poku

Hey, I want to use the Windows logon information to check if a user can use my "classic asp" site. So if the user is logon at a certain Windows Domain network he/she can enter the site and i can use this persons Windows logon information on my asp site. I know its possible with ASP.NET but is it also possible with "classic asp", if yes, how?

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Selling upper management on converting to ASP.net from Classic ASP

- by Tarzan

A client of mine has an application written in Classic ASP and COM+. The managers are interested in migrating it to ASP.net MVC but they have to convince the CIO that it is a good move. The old app still works OK, other than the fact that no one at the company can maintain it. How can we sell upper management on converting to ASP.net from Classic ASP? Thanks in advance!

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Spark-View-Engine with ASP.NET MVC2

- by Ben

How do you modify a ASP.NET MVC 2.0 project to work with the Spark View Engine? I tried like described here: http://dotnetslackers.com/articles/aspnet/installing-the-spark-view-engine-into-asp-net-mvc-2-preview-2.aspx But somehow it still tries to route to .aspx files. Here the code of my global.asax: public class MvcApplication : System.Web.HttpApplication { public static void RegisterRoutes(RouteCollection routes) { routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Home", action = "Index", id = "" } // Parameter defaults ); } protected void Application_Start() { SparkViewFactory svf = new SparkViewFactory(); PrecompileViews(svf); AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); } public static void PrecompileViews(SparkViewFactory svf) { var controllerFactory = svf; var viewFactory = new SparkViewFactory(controllerFactory.Settings); var batch = new SparkBatchDescriptor(); batch .For<HomeController>() .For<AccountController>(); viewFactory.Precompile(batch); } } }

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help me with asp.net mvc 2 custom validation attribute

- by Omu

I'm trying to write a validation attribute that is going to check that at least one of the specified properties is true [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)] public sealed class AtLeastOneTrueAttribute : ValidationAttribute { private const string DefaultErrorMessage = "select at least one"; public AtLeastOneTrueAttribute(params string[] props) : base(DefaultErrorMessage) { this.props = props; } private readonly string[] props; public override string FormatErrorMessage(string name) { return DefaultErrorMessage; } public override bool IsValid(object value) { var properties = TypeDescriptor.GetProperties(value); return props.Any(p => (bool) properties.Find(p, true).GetValue(value)); } } now when I'm trying to use I can't really get specify the props after the fir , the intellisence shows me that I'm entering the ErrorMessage and only the first string is the params string[] props

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ASP.NET MCV 2, re-use of SQL-Connection string

- by cc0

Hi, so I'm very very far from an expert on MVC or ASP.NET. I just want to make a few simple Controllers in C# at the moment, so I have the following question; Right now I have the connection string used by the controller, -inside- the controller itself. Which is kind of silly when there are multiple controllers using the same string. I'd like to be able to change the connection string in just one place and have it affect all controllers. Not knowing a lot about asp.net or the 'm' and 'v' part of MVC, what would be the best (and simplest) way of going about accomplishing just this? I'd appreciate any input on this, examples would be great too.

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ASP.NET MVC2 Custom membership

- by ile

Is there any tutorial of how to create custom membership for asp.net mvc2 based on asp.net membership provider? Thanks in advance, Ile

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How do I install ASP.NET MVC 2 Futures?

- by Zack Peterson

I want to use the DataAnnotations.DisplayAttribute.Order property to arrange my fields when using the DisplayForModel and EditorForModel methods. Related question: Does the DataAnnotations.DisplayAttribute.Order property not work with ASP.NET MVC 2? I think that I need to use the ASP.NET MVC 2 Futures. But I can't get it to work. How do I install ASP.NET MVC 2 Futures? Why are my fields still out of order?

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client side validation in ascx files (user controls) for asp.net mvc

- by Sefer KILIÇ

hi, I have a logOn forn in ascx files and I render it as partial. How I can add a clinet side validation to this form, have any idea ? My below code does not work <%= Html.ValidationSummary(true, "Giris basarisiz oldu. Lütfen hatalari düzeltip tekrar deneyin.") %> <% Html.EnableClientValidation(); %> <% using (Html.BeginForm("LogOnProcess", "Account")) { %> <div> <fieldset> <legend>Hesap Bilgileri</legend> <div class="editor-label"> <%= Html.LabelFor(m => m.UserName) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(m => m.UserName) %> <%= Html.ValidationMessageFor(m => m.UserName) %> </div> <div class="editor-label"> <%= Html.LabelFor(m => m.Password) %> </div> <div class="editor-field"> <%= Html.PasswordFor(m => m.Password) %> <%= Html.ValidationMessageFor(m => m.Password) %> </div> <div class="editor-label"> <%= Html.CheckBoxFor(m => m.RememberMe) %> <%= Html.LabelFor(m => m.RememberMe) %> </div> <p> <input type="submit" value="Giris" /> </p> </fieldset> </div> <% } %>

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asp.net mvc and portal like functionality

- by richard-heesbeen

fHi, I need to build an site with some portal like functionality where an param in the request will indentify the portal. like so http:/domain/controller/action/portal Now my problem is if an portal doesn't exists there must be an redirect to an other site/page and an user can login in to one portal but if the user comes to an other portal the user must be redirected back to the login page for that portal. I have something working now, but i feel like there must be an central place in the pipeline to handle this. My current solution uses an custom action filter which checks the portal param and sees if the portal exists and checks if the user logged on in that portal (the portal the user logged on for is in the authentication cookie). I make my own IIndentiy and IPrincipal in the application_postauthentication event. I have 2 problems with my current approach: 1: It's not really enforced, i have to add the attributes to all controllers and/or actions. 2: The isauthenticated on an user isn't really working, i would like that to work. But for that i need to have access to the params of the route when i create my IPrincipal/IIndenty and i can't seem to find an correct place to do that. Hope someone can give me some pointers, Richard.

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MVC routing problems - url generation

- by roncansan

Hi, I what to create a url that looks like website.com/sea/season/23/team Here is the MapRoute routes.MapRoute( "SeaTeam", "sea/season/{seasonId}/team/{action}/{name}", new { controller = "Team", action = "Index", name = UrlParameter.Optional} ); The Html.ActionLink looks like @Html.ActionLink("Add Team", "Index", "SeaTeam", new { seasonId = seasons.id }, null) But its generating the following url <a href="/SeaTeam?seasonId=1">Add Team</a> Any insights? Thanks...

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ASP.NET MVC Routing - Redirect to aspx?

- by bmoeskau

This seems like it should be easy, but for some reason I'm having no luck. I'm migrating an existing WebForms app to MVC, so I need to keep the root of the site pointing to my existing aspx pages for now and only apply routing to named routes. Here's what I have: public static void RegisterRoutes(RouteCollection routes) { routes.IgnoreRoute("{resource}.axd/{*pathInfo}"); routes.IgnoreRoute("{resource}.aspx/{*pathInfo}"); RouteTable.Routes.Add( "Root", new Route("", new DefaultRouteHandler()) ); routes.MapRoute( "Default", // Route name "{controller}/{action}/{id}", // URL with parameters new { controller = "Calendar2", action = "Index", id = "" } // Parameter defaults ); } So aspx pages should be ignored, and the default root url should be handled by this handler: public class DefaultRouteHandler : IRouteHandler { public IHttpHandler GetHttpHandler(RequestContext requestContext) { return System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath( "~/Dashboard/default.aspx", typeof(Page)) as IHttpHandler; } } This seems to work OK, but the resulting YPOD gives me this: Multiple controls with the same ID '__Page' were found. Trace requires that controls have unique IDs. which seems to imply that the page is somehow getting rendered twice. If I simply type in the url to my dashboard page directly it works fine (no routing, no error). I have no idea why the handler code would be doing anything differently. Bottom line -- I'd like to simply redirect the root url path to an aspx of my choosing -- can anyone shed some light?

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Site Security/Access management for asp.net mvc application

- by minal

I am trying to find a good pattern to use for user access validation. Basically on a webforms application I had a framework which used user roles to define access, ie, users were assigned into roles, and "pages" were granted access to a page. I had a table in the database with all the pages listed in it. Pages could have child pages that got their access inherited from the parent. When defining access, I assigned the roles access to the pages. Users in the role then had access to the pages. It is fairly simple to manage as well. The way I implemented this was on a base class that every page inherited. On pageload/init I would check the page url and validate access and act appropriately. However I am now working on a MVC application and need to implement something similar, however I can't find a good way to make my previous solution work. Purely because I don't have static pages as url paths. Also I am not sure how best to approach this as I now have controllers rather then aspx pages. I have looked at the MVCSitemapprovider, but that does not work off a database, it needs a sitemap file. I need control of changing user persmissions on the fly. Any thoughts/suggestions/pointers would be greatly appreciated.

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HttpModule with ASP.NET MVC not being called

- by mgroves

I am trying to implement a session-per-request pattern in an ASP.NET MVC 2 Preview 1 application, and I've implemented an IHttpModule to help me do this: public class SessionModule : IHttpModule { public void Init(HttpApplication context) { context.Response.Write("Init!"); context.EndRequest += context_EndRequest; } // ... etc... } And I've put this into the web.config: <system.web> <httpModules> <add name="SessionModule" type="MyNamespace.SessionModule" /> </httpModules> <system.webServer> <modules runAllManagedModulesForAllRequests="true"> <remove name="SessionModule" /> <add name="SessionModule" type="MyNamespace.SessionModule" /> </modules> However, "Init!" never gets written to the page (I'm using the built-in VS web server, Cassini). Additionally, I've tried putting breakpoints in the SessionModule but they never break. What am I missing?

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ASP.NET-MVC Page: image logo is not displaying while sending the email

- by Rita

Hi I have a page that sends an email on ASP.NET MVC Page. All the Text is displaying but the image is not displaying. Any workaround. Appreciate your responses. Here is my code: MailMessage mailMsg = new MailMessage(); mailMsg.IsBodyHtml = true; mailMsg.From = new MailAddress(ConfigurationManager.AppSettings["Email.Sender"]); mailMsg.To.Add(new MailAddress(email)); mailMsg.Subject = "Test mail to display the Logo in the email"; mailMsg.Body = " Test mail to display the Logo in the email; mailMsg.Body += Environment.NewLine + Environment.NewLine + "<html><body><img src=cid:companylogo/><br></body></html>"; //Insert Logo string logoPath = Server.MapPath(Links.Content.images.Amgen_MedInfo_Logo_jpg); // logo is placed in images folder LinkedResource logo = new LinkedResource(logoPath); logo.ContentId = "companylogo"; // done HTML formatting in the next line to display logo AlternateView aView = AlternateView.CreateAlternateViewFromString(mailMsg.Body, new System.Net.Mime.ContentType("text/html")); aView.LinkedResources.Add(logo); mailMsg.AlternateViews.Add(aView); mailMsg.IsBodyHtml = true; SmtpClient smtpClient = new SmtpClient(ConfigurationManager.AppSettings["SMTP"]); smtpClient.Send(mailMsg);

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- by AlexWalker

- by Fox

- by Mohammad Sepahvand

- by ace

- by prerna

- by krystan honour

- by Rising Star

- by Ray ForRespect

- by Kyle

- by David

- by Jas

- by Poku

- by Tarzan

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- by Omu

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