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  • What are some useful things you can do with Mvc Modelbinders?

    - by George Mauer
    It occurs to me that the ModelBinder mechanism in ASP MVC public interface IModelBinder { object BindModel(System.Web.Mvc.ControllerContext controllerContext, System.Web.Mvc.ModelBindingContext bindingContext); } Is insanely powerful. What are some cool uses of this mechanism that you've done/seen? I guess since the concept is similar in other frameworks there's no reason to limit it to Asp Mvc

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  • Asp.net override Membership settings at runtime (asp.net mvc)

    - by minal
    I had an application that hooked onto 1 single database. The app now needs to hook into multiple databases. What we want to do is, using the same application/domain/hostname/virtual dir give the user the option on the login screen to select the "App/Database" they want to connect into. Each database has the App tables/data/procs/etc as well as the aspnet membership/roles stuff. When the user enters the username/password and selects (select list) the application, I want to validate the user against the selected applications database. Presently the database connection string for membership services is saved in the web.config. Is there any way I can override this at login time? Also, I need the "remember me" function to work smoothly as well. How does this work when the user comes back to the app in 5 hours... This process should be able to identify the user and application and log in appropriately.

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  • ASP.NET MVC: Using ProfileRequiredAttribute to restrict access to pages

    - by DigiMortal
    If you are using AppFabric Access Control Services to authenticate users when they log in to your community site using Live ID, Google or some other popular identity provider, you need more than AuthorizeAttribute to make sure that users can access the content that is there for authenticated users only. In this posting I will show you hot to extend the AuthorizeAttribute so users must also have user profile filled. Semi-authorized users When user is authenticated through external identity provider then not all identity providers give us user name or other information we ask users when they join with our site. What all identity providers have in common is unique ID that helps you identify the user. Example. Users authenticated through Windows Live ID by AppFabric ACS have no name specified. Google’s identity provider is able to provide you with user name and e-mail address if user agrees to publish this information to you. They both give you unique ID of user when user is successfully authenticated in their service. There is logical shift between ASP.NET and my site when considering user as authorized. For ASP.NET MVC user is authorized when user has identity. For my site user is authorized when user has profile and row in my users table. Having profile means that user has unique username in my system and he or she is always identified by this username by other users. My solution is simple: I created my own action filter attribute that makes sure if user has profile to access given method and if user has no profile then browser is redirected to join page. Illustrating the problem Usually we restrict access to page using AuthorizeAttribute. Code is something like this. [Authorize] public ActionResult Details(string id) {     var profile = _userRepository.GetUserByUserName(id);     return View(profile); } If this page is only for site users and we have user profiles then all users – the ones that have profile and all the others that are just authenticated – can access the information. It is okay because all these users have successfully logged in in some service that is supported by AppFabric ACS. In my site the users with no profile are in grey spot. They are on half way to be users because they have no username and profile on my site yet. So looking at the image above again we need something that adds profile existence condition to user-only content. [ProfileRequired] public ActionResult Details(string id) {     var profile = _userRepository.GetUserByUserName(id);     return View(profile); } Now, this attribute will solve our problem as soon as we implement it. ProfileRequiredAttribute: Profiles are required to be fully authorized Here is my implementation of ProfileRequiredAttribute. It is pretty new and right now it is more like working draft but you can already play with it. public class ProfileRequiredAttribute : AuthorizeAttribute {     private readonly string _redirectUrl;       public ProfileRequiredAttribute()     {         _redirectUrl = ConfigurationManager.AppSettings["JoinUrl"];         if (string.IsNullOrWhiteSpace(_redirectUrl))             _redirectUrl = "~/";     }              public override void OnAuthorization(AuthorizationContext filterContext)     {         base.OnAuthorization(filterContext);           var httpContext = filterContext.HttpContext;         var identity = httpContext.User.Identity;           if (!identity.IsAuthenticated || identity.GetProfile() == null)             if(filterContext.Result == null)                 httpContext.Response.Redirect(_redirectUrl);          } } All methods with this attribute work as follows: if user is not authenticated then he or she is redirected to AppFabric ACS identity provider selection page, if user is authenticated but has no profile then user is by default redirected to main page of site but if you have application setting with name JoinUrl then user is redirected to this URL. First case is handled by AuthorizeAttribute and the second one is handled by custom logic in ProfileRequiredAttribute class. GetProfile() extension method To get user profile using less code in places where profiles are needed I wrote GetProfile() extension method for IIdentity interface. There are some more extension methods that read out user and identity provider identifier from claims and based on this information user profile is read from database. If you take this code with copy and paste I am sure it doesn’t work for you but you get the idea. public static User GetProfile(this IIdentity identity) {     if (identity == null)         return null;       var context = HttpContext.Current;     if (context.Items["UserProfile"] != null)         return context.Items["UserProfile"] as User;       var provider = identity.GetIdentityProvider();     var nameId = identity.GetNameIdentifier();       var rep = ObjectFactory.GetInstance<IUserRepository>();     var profile = rep.GetUserByProviderAndNameId(provider, nameId);       context.Items["UserProfile"] = profile;       return profile; } To avoid round trips to database I cache user profile to current request because the chance that profile gets changed meanwhile is very minimal. The other reason is maybe more tricky – profile objects are coming from Entity Framework context and context has also HTTP request as lifecycle. Conclusion This posting gave you some ideas how to finish user profiles stuff when you use AppFabric ACS as external authentication provider. Although there was little shift between us and ASP.NET MVC with interpretation of “authorized” we were easily able to solve the problem by extending AuthorizeAttribute to get all our requirements fulfilled. We also write extension method for IIdentity that returns as user profile based on username and caches the profile in HTTP request scope.

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  • Asp.net MVC VirtualPathProvider views parse error

    - by madcapnmckay
    Hi, I am working on a plugin system for Asp.net MVC 2. I have a dll containing controllers and views as embedded resources. I scan the plugin dlls for controller using StructureMap and I then can pull them out and instantiate them when requested. This works fine. I then have a VirtualPathProvider which I adapted from this post public class AssemblyResourceProvider : VirtualPathProvider { protected virtual string WidgetDirectory { get { return "~/bin"; } } private bool IsAppResourcePath(string virtualPath) { var checkPath = VirtualPathUtility.ToAppRelative(virtualPath); return checkPath.StartsWith(WidgetDirectory, StringComparison.InvariantCultureIgnoreCase); } public override bool FileExists(string virtualPath) { return (IsAppResourcePath(virtualPath) || base.FileExists(virtualPath)); } public override VirtualFile GetFile(string virtualPath) { return IsAppResourcePath(virtualPath) ? new AssemblyResourceVirtualFile(virtualPath) : base.GetFile(virtualPath); } public override CacheDependency GetCacheDependency(string virtualPath, IEnumerable virtualPathDependencies, DateTime utcStart) { return IsAppResourcePath(virtualPath) ? null : base.GetCacheDependency(virtualPath, virtualPathDependencies, utcStart); } } internal class AssemblyResourceVirtualFile : VirtualFile { private readonly string path; public AssemblyResourceVirtualFile(string virtualPath) : base(virtualPath) { path = VirtualPathUtility.ToAppRelative(virtualPath); } public override Stream Open() { var parts = path.Split('/'); var resourceName = Path.GetFileName(path); var apath = HttpContext.Current.Server.MapPath(Path.GetDirectoryName(path)); var assembly = Assembly.LoadFile(apath); return assembly != null ? assembly.GetManifestResourceStream(assembly.GetManifestResourceNames().SingleOrDefault(s => string.Compare(s, resourceName, true) == 0)) : null; } } The VPP seems to be working fine also. The view is found and is pulled out into a stream. I then receive a parse error Could not load type 'System.Web.Mvc.ViewUserControl<dynamic>'. which I can't find mentioned in any previous example of pluggable views. Why would my view not compile at this stage? Thanks for any help, Ian EDIT: Getting closer to an answer but not quite clear why things aren't compiling. Based on the comments I checked the versions and everything is in V2, I believe dynamic was brought in at V2 so this is fine. I don't even have V3 installed so it can't be that. I have however got the view to render, if I remove the <dynamic> altogether. So a VPP works but only if the view is not strongly typed or dynamic This makes sense for the strongly typed scenario as the type is in the dynamically loaded dll so the viewengine will not be aware of it, even though the dll is in the bin. Is there a way to load types at app start? Considering having a go with MEF instead of my bespoke Structuremap solution. What do you think?

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  • How to use jQuery Date Range Picker plugin in asp.net

    - by alaa9jo
    I stepped by this page: http://www.filamentgroup.com/lab/date_range_picker_using_jquery_ui_16_and_jquery_ui_css_framework/ and let me tell you,this is one of the best and coolest daterangepicker in the web in my opinion,they did a great job with extending the original jQuery UI DatePicker.Of course I made enhancements to the original plugin (fixed few bugs) and added a new option (Clear) to clear the textbox. In this article I well use that updated plugin and show you how to use it in asp.net..you will definitely like it. So,What do I need? 1- jQuery library : you can use 1.3.2 or 1.4.2 which is the latest version so far,in my article I will use the latest version. 2- jQuery UI library (1.8): As I mentioned earlier,daterangepicker plugin is based on the original jQuery UI DatePicker so that library should be included into your page. 3- jQuery DateRangePicker plugin : you can go to the author page or use the modified one (it's included in the attachment),in this article I will use the modified one. 4- Visual Studio 2005 or later : very funny :D,in my article I will use VS 2008. Note: in the attachment,I included all CSS and JS files so don't worry. How to use it? First thing,you will have to include all of the CSS and JS files into your page like this: <script src="Scripts/jquery-1.4.2.min.js" type="text/javascript"></script> <script src="Scripts/jquery-ui-1.8.custom.min.js" type="text/javascript"></script> <script src="Scripts/daterangepicker.jQuery.js" type="text/javascript"></script> <link href="CSS/redmond/jquery-ui-1.8.custom.css" rel="stylesheet" type="text/css" /> <link href="CSS/ui.daterangepicker.css" rel="stylesheet" type="text/css" /> <style type="text/css"> .ui-daterangepicker { font-size: 10px; } </style> Then add this html: <asp:TextBox ID="TextBox1" runat="server" Font-Size="10px"></asp:TextBox><asp:Button ID="SubmitButton" runat="server" Text="Submit" OnClick="SubmitButton_Click" /> <span>First Date:</span><asp:Label ID="FirstDate" runat="server"></asp:Label> <span>Second Date:</span><asp:Label ID="SecondDate" runat="server"></asp:Label> As you can see,it includes TextBox1 which we are going to attach the daterangepicker to it,2 labels to show you later on by code on how to read the date from the textbox and set it to the labels Now we have to attach the daterangepicker to the textbox by using jQuery (Note:visit the author's website for more info on daterangerpicker's options and how to use them): <script type="text/javascript"> $(function() { $("#<%= TextBox1.ClientID %>").attr("readonly", "readonly"); $("#<%= TextBox1.ClientID %>").attr("unselectable", "on"); $("#<%= TextBox1.ClientID %>").daterangepicker({ presetRanges: [], arrows: true, dateFormat: 'd M, yy', clearValue: '', datepickerOptions: { changeMonth: true, changeYear: true} }); }); </script> Finally,add this C# code: protected void SubmitButton_Click(object sender, EventArgs e) { if (TextBox1.Text.Trim().Length == 0) { return; } string selectedDate = TextBox1.Text; if (selectedDate.Contains("-")) { DateTime startDate; DateTime endDate; string[] splittedDates = selectedDate.Split("-".ToCharArray(), StringSplitOptions.RemoveEmptyEntries); if (splittedDates.Count() == 2 && DateTime.TryParse(splittedDates[0], out startDate) && DateTime.TryParse(splittedDates[1], out endDate)) { FirstDate.Text = startDate.ToShortDateString(); SecondDate.Text = endDate.ToShortDateString(); } else { //maybe the client has modified/altered the input i.e. hacking tools } } else { DateTime selectedDateObj; if (DateTime.TryParse(selectedDate, out selectedDateObj)) { FirstDate.Text = selectedDateObj.ToShortDateString(); SecondDate.Text = string.Empty; } else { //maybe the client has modified/altered the input i.e. hacking tools } } } This is the way on how to read from the textbox,That's it!. FAQ: 1-Why did you add this code?: <style type="text/css"> .ui-daterangepicker { font-size: 10px; } </style> A:For two reasons: 1)To show the Daterangepicker in a smaller size because it's original size is huge 2)To show you how to control the size of it. 2- Can I change the theme? A: yes you can,you will notice that I'm using Redmond theme which you will find it in jQuery UI website,visit their website and download a different theme,you may also have to make modifications to the css of daterangepicker,it's all yours. 3- Why did you add a font size to the textbox? A: To make the design look better,try to remove it and see by your self. 4- Can I register the script at codebehind? A: yes you can 5- I see you have added these two lines,what they do? $("#<%= TextBox1.ClientID %>").attr("readonly", "readonly"); $("#<%= TextBox1.ClientID %>").attr("unselectable", "on"); A:The first line will make the textbox not editable by the user,the second will block the blinking typing cursor from appearing if the user clicked on the textbox,you will notice that both lines are necessary to be used together,you can't just use one of them...for logical reasons of course. Finally,I hope everyone liked the article and as always,your feedbacks are always welcomed and if anyone have any suggestions or made any modifications that might be useful for anyone else then please post it at at the author's website and post a reference to your post here.

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  • Getting Current with Visual Studio 2010 for Web Developers

    - by plitwin
    I don't know about you, but I find it kind of crazy at times figuring out if I have the latest of everything there is for the Visual Studio 2010 developer from Microsoft. (This does not include any third-party components, just recommended updates from Microsoft.) And the be honest, the msn.microsoft.com and asp.net sites are not that helpful in figuring this out.In an effort to help, I have enumerated here what the latest VS 2010 setup should include, complete with download links. When you install everything here, you will be able to develop ASP.NET 4.0 Web Forms and ASP.NET MVC 3 applications and web sites in addition to the other stuff your version of Visual Studio supports (e.g., Silverlight, WPF, etc.). These downloads will also include NuGet and the Entity Framework 4.1, so there is no need to download this software separately.Visual Studio 2010. First of all, you need to purchase and install Visual Studio 2010 itself. For the free Express version, you can download it from Visual Web Developer 2010 ExpressVisual Studio Service Pack 1 (released Spring 2011).This is a must-have download that fixes a bunch of bugs and a number of enhancements too including preliminary support for HTML5 and CSS3. See #4 below for better support of these web technologies. Download and install from VS 2010 SP1 download page. You can find details on the features of the service pack here. ASP.NET MVC3 Tools Update (released Spring 2011)If you are using ASP.NET MVC 3, then you should also download install this update for Visual Studio from ASP.NET MVC3 Tools Update download page. This update improves Visual Studio's support for MVC 3, including better scaffolding, NuGet, Entity Framework 4.1, and more. A good overview of the updates can be found in Phil Haack's blog post.Web Standards Update for Microsoft Visual Studio 2010 SP1 (released June 2011)This is an update to VS 2010 SP1 that "brings VS 2010 intellisense & validation as close to W3C specification as we could get via means of an extension". Download and install from Web Standards Update download page. A good description of the changes can be found in the Visual Web Developer Team blog post.Note: I don't control these download pages, so it is possible they will change. If so, I will do my best to update these links. This information was current as of June 24, 2011.

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  • Functions inside page using Razor View Engine – ASP.NET MVC

    - by hajan
    As we already know, Razor is probably the best view engine for ASP.NET MVC so far. It keeps your code fluid and very expressive. Besides the other functionalities Razor has, it also supports writing local functions. If you want to write a function, you can’t just open new @{ } razor block and write it there… it won’t work. Instead, you should specify @functions { } so that inside the brackets you will write your own C#/VB.NET functions/methods. Lets see an example: 1. I have the following loop that prints data using Razor <ul> @{     int N = 10;     for (int i = 1; i<=N; i++)     {         <li>Number @i</li>     }     } </ul> This code will print the numbers from 1 to 10: Number 1 Number 2 Number 3 Number 4 Number 5 Number 6 Number 7 Number 8 Number 9 Number 10 So, now lets write a function that will check if current number is even, if yes… add Even before Number word. Function in Razor @functions{     public bool isEven(int number)     {         return number % 2 == 0 ? true : false;     } } The modified code which creates unordered list is: <ul> @{     int N = 10;     for (int i = 1; i<=N; i++)     {         if (isEven(@i)) {             <li>Even number @i</li>         }         else {             <li>Number @i</li>         }                 }             } </ul> As you can see, in the modified code we use the isEven(@i) function to check if the current number is even or not… The result is: Number 1 Even number 2 Number 3 Even number 4 Number 5 Even number 6 Number 7 Even number 8 Number 9 Even number 10 So, the main point of this blog was to show how you can define your own functions inside page using Razor View Engine. Of course you can define multiple functions inside the same @functions { } defined razor statement. The complete code: @{     Layout = null; } <!DOCTYPE html> <html> <head>     <title>ASP.NET MVC - Razor View Engine :: Functions</title> </head> <body>     <div>         <ul>         @{             int N = 10;             for (int i = 1; i<=N; i++)             {                 if (isEven(@i)) {                     <li>Even number @i</li>                 }                 else {                     <li>Number @i</li>                 }                         }                     }         </ul>         @functions{             public bool isEven(int number)             {                 return number % 2 == 0 ? true : false;             }         }     </div> </body> </html> Hope you like it. Regards, Hajan

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  • ASP.NET MVC–How to show asterisk after required field label

    - by DigiMortal
    Usually we have some required fields on our forms and it would be nice if ASP.NET MVC views can detect those fields automatically and display nice red asterisk after field label. As this functionality is not built in I built my own solution based on data annotations. In this posting I will show you how to show red asterisk after label of required fields. Here are the main information sources I used when working out my own solution: How can I modify LabelFor to display an asterisk on required fields? (stackoverflow) ASP.NET MVC – Display visual hints for the required fields in your model (Radu Enuca) Although my code was first written for completely different situation I needed it later and I modified it to work with models that use data annotations. If data member of model has Required attribute set then asterisk is rendered after field. If Required attribute is missing then there will be no asterisk. Here’s my code. You can take just LabelForRequired() methods and paste them to your own HTML extension class. public static class HtmlExtensions {     [SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "This is an appropriate nesting of generic types")]     public static MvcHtmlString LabelForRequired<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, string labelText = "")     {         return LabelHelper(html,             ModelMetadata.FromLambdaExpression(expression, html.ViewData),             ExpressionHelper.GetExpressionText(expression), labelText);     }       private static MvcHtmlString LabelHelper(HtmlHelper html,         ModelMetadata metadata, string htmlFieldName, string labelText)     {         if (string.IsNullOrEmpty(labelText))         {             labelText = metadata.DisplayName ?? metadata.PropertyName ?? htmlFieldName.Split('.').Last();         }           if (string.IsNullOrEmpty(labelText))         {             return MvcHtmlString.Empty;         }           bool isRequired = false;           if (metadata.ContainerType != null)         {             isRequired = metadata.ContainerType.GetProperty(metadata.PropertyName)                             .GetCustomAttributes(typeof(RequiredAttribute), false)                             .Length == 1;         }           TagBuilder tag = new TagBuilder("label");         tag.Attributes.Add(             "for",             TagBuilder.CreateSanitizedId(                 html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(htmlFieldName)             )         );           if (isRequired)             tag.Attributes.Add("class", "label-required");           tag.SetInnerText(labelText);           var output = tag.ToString(TagRenderMode.Normal);             if (isRequired)         {             var asteriskTag = new TagBuilder("span");             asteriskTag.Attributes.Add("class", "required");             asteriskTag.SetInnerText("*");             output += asteriskTag.ToString(TagRenderMode.Normal);         }         return MvcHtmlString.Create(output);     } } And here’s how to use LabelForRequired extension method in your view: <div class="field">     @Html.LabelForRequired(m => m.Name)     @Html.TextBoxFor(m => m.Name)     @Html.ValidationMessageFor(m => m.Name) </div> After playing with CSS style called .required my example form looks like this: These red asterisks are not part of original view mark-up. LabelForRequired method detected that these properties have Required attribute set and rendered out asterisks after field names. NB! By default asterisks are not red. You have to define CSS class called “required” to modify how asterisk looks like and how it is positioned.

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  • Is ASP.NET MVC completely (and exclusively) based on conventions?

    - by Mike Valeriano
    --TL;DR Is there a "Hello World!" ASP.NET MVC tutorial out there that doesn't rely on conventions and "stock" projects? Is it even possible to take advantage of the technology without reusing the default file structure, and start from a single "hello_world.asp" file or something (like in PHP)? Am I completely mistaken and I should be looking somewhere else, maybe this? I'm interested in the MVC framework, not Web Forms --Background I've played a bit with PHP in the past, just for fun, and now I'm back to it since web development became relevant for me once again. I'm no professional, but I try to gain as much knowledge and control over the technology I'm working with as possible. I'm using Visual Studio 2012 for C# - my "desktop" language of choice - and since I got the Professional Edition from Dreamspark, the Web Development Tools are available, including ASP.NET MVC 4. I won't touch Web Forms, but the MVC Framework got my attention because the MVC pattern is something I can really relate to, since it provides the control I want but... not quite. Learning PHP was easy - and right form the start I could just create a "hello_world.php" file and just do something like this for immediate results: <!-- file: hello_world.php --> <?php> echo "Hello World!"; <?> But I couldn't find a single ASP.NET (MVC) tutorial out there (I'll be sure to buy one of the upcoming MVC 4 books, only a month away or so) that would start like that. They all start with a sample project, building up knowledge from the basics and heavily using conventions as they go along. Which is fine, I suppose, but it's now the best way for me to learn things. Even the "Empty" project template for a new ASP.NET MVC 4 Application in VS2012 is not empty at all: several files and folders are created for you - much like a new C# desktop application project, but with C# I can in fact start from scratch, creating the project structure myself. It is not the case with PHP: I can choose from a plethora of different MVC frameworks I can just create my own framework I can just skip frameworks altogether, and toss random PHP along with my HTML on a single file and make it work I understand the framework needs to establish some rules, but what if I just want to create a single page website with some C# logic behind it? Do I really need to create a whole bloat of files and folders for the sake of convention? Also, please understand that I haven't gotten far on any of those tutorials mainly because of this reason, but, if that's the only way to do it, I'll go for it using one of the books I've mentioned before. This is my first contact with ASP.NET but from the few comparisons I've read, I believe I should stay the hell away from Web Forms. Thank you. (Please forgive the broken English - it is not my primary language.)

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  • Gateway Page Between ASP and an ASP.NET Page

    - by ajdams
    I'll admit, I am pretty new with ASP .NET programming and I have been asked to take all our gateway pages (written in classic ASP) and make one universal gateway page to the few C# .NET applications we have (that I wrote). I tried searching here and the web and couldn't find much of anything describing a great way to do this and figured I was either not searching properly or was not properly naming what I am trying to do. I decided to to take one of the main gateway pages we had in classic ASP and use that as a base for my new gateway. Without boring you with a bunch of code I will summarize my gateway in steps and then can take advice/critique from there. EDIT: Basically what I am trying to do is go from a classic ASP page to a ASP .NET page and then back again. EDIT2: If my question is still unclear I am asking if what I have an the right start and if anyone has suggestions as to how this could be better. It can be as generic as need-be, not looking for a specific off-the-shelf code answer. My Gateway page: In the first part of the page I grab session variables and determine if the user is leaving or returning through the gateway: Code (in VB): uid = Request.QueryString("GUID") If uid = "" Then direction = "Leaving" End If ' Gather available user information. userid = Session("lnglrnregid") bankid = Session("strBankid") ' Return location. floor = Request.QueryString("Floor") ' The option chosen will determine if the user continues as SSL or not. ' If they are currently SSL, they should remain if chosen. option1 = Application(bankid & "Option1") If MID(option1, 6, 1) = "1" Then sslHttps = "s" End If Next I enter the uid into a database table (SQL-Server 2005) as a uniqueidentifier field called GUID. I omitted the stored procedure call. Lastly, I use the direction variable to determine if the user is leaving or returning and do redirects from there to the different areas of the site. Code (In VB again): If direction = "Leaving" Then Select Case floor Case "sscat", "ssassign" ' A SkillSoft course Response.Redirect("Some site here") Case "lrcat", "lrassign" ' A LawRoom course Response.Redirect("Some site here") Case Else ' Some other SCORM course like MindLeaders or a custom upload. Response.Redirect("Some site here") End Select Session.Abandon Else ' The only other direction is "Returning" ..... That's about it so far - so like I said, not an expert so any suggestions would be greatly appreciated!

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  • Persisting model state in ASP.NET MVC using Serialize HTMLHelper

    - by shiju
    ASP.NET MVC 2 futures assembly provides a HTML helper method Serialize that can be use for persisting your model object. The Serialize  helper method will serialize the model object and will persist it in a hidden field in the HTML form. The Serialize  helper is very useful when situations like you are making multi-step wizard where a single model class is using for all steps in the wizard. For each step you want to retain the model object's whole state.The below is serializing our model object. The model object should be a Serializable class in order to work with Serialize helper method. <% using (Html.BeginForm("Register","User")) {%><%= Html.Serialize("User",Model) %> This will generate hidden field with name "user" and the value will the serialized format of our model object.In the controller action, you can place the DeserializeAttribute in the action method parameter. [HttpPost]               public ActionResult Register([DeserializeAttribute] User user, FormCollection userForm) {     TryUpdateModel(user, userForm.ToValueProvider());     //To Do } In the above action method you will get the same model object that you serialized in your view template. We are updating the User model object with the form field values.

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  • Persisting model state in ASP.NET MVC using Serialize HTMLHelper

    - by shiju
    ASP.NET MVC 2 futures assembly provides a HTML helper method Serialize that can be use for persisting your model object. The Serialize  helper method will serialize the model object and will persist it in a hidden field in the HTML form. The Serialize  helper is very useful when situations like you are making multi-step wizard where a single model class is using for all steps in the wizard. For each step you want to retain the model object's whole state.The below is serializing our model object. The model object should be a Serializable class in order to work with Serialize helper method. <% using (Html.BeginForm("Register","User")) {%><%= Html.Serialize("User",Model) %> This will generate hidden field with name "user" and the value will the serialized format of our model object.In the controller action, you can place the DeserializeAttribute in the action method parameter. [HttpPost]               public ActionResult Register([DeserializeAttribute] User user, FormCollection userForm) {     TryUpdateModel(user, userForm.ToValueProvider());     //To Do } In the above action method you will get the same model object that you serialized in your view template. We are updating the User model object with the form field values.

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  • MVC Scaffold Template Not Generating?

    - by monkey9987
    Been working on an MVC project and my templates were not generating. I first created my Model inside my "Models" folder, then did a quick compile. Next I went to the Views folder to get it created, right click and say "Add View" then I clicked the checkbox to create an edit page. What happened was the template would never seem to pull in my Model, it would just have the default header items, but the entire model was missing.  My model was defined as follows: public class LogOnModel { [Required][Display(Name = "User name")]public string UserName;[Required][DataType(DataType.Password)][Display(Name = "Password")]public string Password;[Display(Name = "Remember me?")]public bool RememberMe; } See anything wrong with that? I couldn't figure out why each time I created my View and selected the option to create the "Edit" scaffold automatically, it would come up blank. Turns out I'm missing my get / set methods on the Model class items. Here's my code with the correct setup: public class LogOnModel { [Required][Display(Name = "User name")]public string UserName { get; set; } [Required][DataType(DataType.Password)][Display(Name = "Password")]public string Password { get; set; }[Display(Name = "Remember me?")]public bool RememberMe { get; set; } }  I hope that helps someone out, it's pretty simple when I look at it now, but that's always the case!  ~ Steve

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  • ASP.NET Performance tip- Combine multiple script file into one request with script manager

    - by Jalpesh P. Vadgama
    We all need java script for our web application and we storing our JavaScript code in .js files. Now If we have more then .js file then our browser will create a new request for each .js file. Which is a little overhead in terms of performance. If you have very big enterprise application you will have so much over head for this. Asp.net Script Manager provides a feature to combine multiple JavaScript into one request but you must remember that this feature will be available only with .NET Framework 3.5 sp1 or higher versions.  Let’s take a simple example. I am having two javascript files Jscrip1.js and Jscript2.js both are having separate functions. //Jscript1.js function Task1() { alert('task1'); } Here is another one for another file. ////Jscript1.js function Task2() { alert('task2'); } Now I am adding script reference with script manager and using this function in my code like this. <form id="form1" runat="server"> <asp:ScriptManager ID="myScriptManager" runat="server" > <Scripts> <asp:ScriptReference Path="~/JScript1.js" /> <asp:ScriptReference Path="~/JScript2.js" /> </Scripts> </asp:ScriptManager> <script language="javascript" type="text/javascript"> Task1(); Task2(); </script> </form> Now Let’s test in Firefox with Lori plug-in which will show you how many request are made for this. Here is output of that. You can see 5 Requests are there. Now let’s do same thing in with ASP.NET Script Manager combined script feature. Like following <form id="form1" runat="server"> <asp:ScriptManager ID="myScriptManager" runat="server" > <CompositeScript> <Scripts> <asp:ScriptReference Path="~/JScript1.js" /> <asp:ScriptReference Path="~/JScript2.js" /> </Scripts> </CompositeScript> </asp:ScriptManager> <script language="javascript" type="text/javascript"> Task1(); Task2(); </script> </form> Now let’s run it and let’s see how many request are there like following. As you can see now we have only 4 request compare to 5 request earlier. So script manager combined multiple script into one request. So if you have lots of javascript files you can save your loading time with this with combining multiple script files into one request. Hope you liked it. Stay tuned for more!!!.. Happy programming.. Technorati Tags: ASP.NET,ScriptManager,Microsoft Ajax

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  • Daily tech links for .net and related technologies - Mar 18-21, 2010

    - by SanjeevAgarwal
    Daily tech links for .net and related technologies - Mar 18-21, 2010 Web Development TDD kata for ASP.NET MVC controllers (part 2) -David Take Control Of Web Control ClientID Values in ASP.NET 4.0 - Scott Mitchell Inside the ASP.NET MVC Controller Factory - Dino Esposito Microsoft, jQuery, and Templating - stephen walther Cross Domain AJAX Request with YQL and jQuery - Jeffrey Way T4MVC Add-In to auto run template -Wayne Web Design Website Content Planning The Right Way - Kristin Wemmer Microsoft...(read more)

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  • Asp.net certification

    - by poter
    I want to certified in .net which certification is best for me ? 8 Months back i am working on .net 3.5 framework, but at the same time .net 4.0 frameworks is also released last year, how can i grow myself by appearing this exams. I want to Switch myself because .net paid good salary package as compare to PHP. Note:-right now i m working in PHP 5.3 and PostgreSQL I know that certs != experience. but still i want to certified

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  • Consuming ASP.NET Web API services from PHP script

    - by DigiMortal
    I introduced ASP.NET Web API in some of my previous posts. Although Web API is easy to use in ASP.NET web applications you can use Web API also from other platforms. This post shows you how to consume ASP.NET Web API from PHP scripts. Here are my previous posts about Web API: How content negotiation works? ASP.NET Web API: Extending content negotiation with new formats Query string based content formatting Although these posts cover content negotiation they give you some idea about how Web API works. Test application On Web API side I use the same sample application as in previous Web API posts – very primitive web application to manage contacts. Listing contacts On the other machine I will run the following PHP script that works against my Web API application: <?php   // request list of contacts from Web API $json = file_get_contents('http://vs2010dev:3613/api/contacts/'); // deserialize data from JSON $contacts = json_decode($json); ?> <html> <head>     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </head> <body>     <table>     <?php      foreach($contacts as $contact)     {         ?>         <tr>             <td valign="top">                 <?php echo $contact->FirstName ?>             </td>             <td valign="top">                 <?php echo $contact->LastName ?>             </td>             <td valign="middle">                 <form method="POST">                     <input type="hidden" name="id"                          value="<?php echo $contact-/>Id ?>" />                     <input type="submit" name="cmd"                          value="Delete"/>                 </form>             </td>         </tr>         <?php     }     ?>     </table> </body> </html> Notice how easy it is to handle JSON data in PHP! My PHP script produces the following output: Looks like data is here as it should be. Deleting contacts Now let’s write code to delete contacts. Add this block of code before any other code in PHP script. if(@$_POST['cmd'] == 'Delete') {     $errno = 0;     $errstr = '';     $id = @$_POST['id'];          $params = array('http' => array(               'method' => 'DELETE',               'content' => ""             ));     $url = 'http://vs2010dev:3613/api/contacts/'.$id;     $ctx = stream_context_create($params);     $fp = fopen($url, 'rb', false, $ctx);       if (!$fp) {         $res = false;       } else {         $res = stream_get_contents($fp);       }     fclose($fp);     header('Location: /json.php');     exit; } Again simple code. If we write also insert and update methods we may want to bundle those operations to single class. Conclusion ASP.NET Web API is not only ASP.NET fun. It is available also for all other platforms. In this posting we wrote simple PHP client that is able to communicate with our Web API application. We wrote only some simple code, nothing complex. Same way we can use also platforms like Java, PERL and Ruby.

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  • What's new in ASP.Net 4.5 and VS 2012 - part 1

    - by nikolaosk
    I have downloaded .Net framework 4.5 and Visual Studio 2012 since it was released to MSDN subscribers on the 15th of August.For people that do not know about that yet please have a look at Jason Zander's excellent blog post .Since then I have been investigating the many new features that have been introduced in this release.In this post I will be looking into new features available in ASP.Net 4.5 and VS 2012.In order to follow along this post you must have Visual Studio 2012 and .Net Framework 4.5 installed in your machine.Download and install VS 2012 using this link.My machine runs on Windows 8 and Visual Studio 2012 works just fine. Please find all my posts regarding VS 2012, here .Well I have not exactly kept my promise for writing short blog posts, so I will try to keep this one short. 1) Launch VS 2012 and create a new Web Forms application by going to File - >New Web Site - > ASP.Net Web Forms Site.2) Choose an appropriate name for your web site.3) Build and run your site (CTRL+F5). Then go to View - > Source to see the HTML markup (Javascript e.t.c) that is rendered through the browser.You will see that the ASP.Net team has done a good job to make the markup cleaner and more readable. The ViewState size is significantly smaller compared to its size to earlier versions.Have a look at the picture below 4) Another thing that you must notice is that the new template makes good use of HTML 5 elements.When you view the application through the browser and then go to View Page Source you will see HTML 5 elements like nav,header,section.Have a look at the picture below  5) In VS 2012 we can browse with multiple browsers. There is a very handy dropdown that shows all the browsers available for viewing the website.Have a look at the picture below When I select the option Browse With... I see another window and I can select any of the installed browsers I want and also set the default browser. Have a look at the picture below  When I click Browse, all the selected browsers fire up and I can view the website in all of them.Have a look at the picture below There will be more posts soon looking into new features of ASP.Net 4.5 and VS 2012Hope it helps!!!

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  • Actions and Controllers managing strategy in MVC apps

    - by singleton
    Can anyone name any usefull strategy/architectural pattern for allocating actions between different controllers when using MVC pattern for developing web application? I am now developing web app using asp.net Mvc3 framework and still can't figure out how to manage actions and controllers. One approach is to create single action controller for each url, but it's not the best choice since to much controllers have to be created. Should I list all available urls that are supported by me web app, devide them into groups and create separate controller for each group or act in any different manner? It seems like I will become face to face with some kind of mess with no consistent approach in managing actions and controllers.

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  • Modular enterprise architecture using MVC and Orchard CMS

    - by MrJD
    I'm making a large scale MVC application using Orchard. And I'm going to be separating my logic into modules. I'm also trying to heavily decouple the application for maximum extensibility and testability. I have a rudimentary understanding of IoC, Repository Pattern, Unit of Work pattern and Service Layer pattern. I've made myself a diagram. I'm wondering if it is correct and if there is anything I have missed regarding an extensible application. Note that each module is a separate project. Update So I have many UI modules that use the db module, that's why they've been split up. There are other services the UI modules will use. The UI modules have been split up because they will be made over time, independent of each other.

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  • MVC helper functions business logic

    - by Menelaos Vergis
    I am creating some helper functions (mvc.net) for creating common controls that I need in almost every project such as alert boxes, dialogs etc. If these do not contain any business logic and it's just client side code (html, js) then it's ok. My problem arises when I need some business logic behind this helper. I want to create a 'rate my (web) application' control that will be visible every 3 days and the user may hide it for now, navigate to rate link or hide it for ever. To do this I need some sort of database access and a code that acts as business logic. Normally I would use a controller for this, with my DI and everything, but I don't know where to put this code now. This should be placed in the helper function or in a controller that responds objects instead of ActionResults?

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  • MVC, when to separate controllers?

    - by Rodolfo
    I'm starting with MVC and have a newbie question. What would be the logic criteria to define what a controller should encompass? For example, say a website has a 'help' section. In there, there are several options like: 'about us', 'return instructions', 'contact us', 'employment opportunities'. Each would then be accessed like 'mysite.com/help/aboutus', 'mysite.com/help/returns', 'mysite.com/help/contactus', etc. My question is, should I have a 'help' controller that has 'about us', 'returns', 'contact us', 'employment' as actions with their respective view, or should each of those be a different controller-action-view set? What should be the line of reasoning to determine when to separate controllers?

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  • ASP.NET Membership API not working on Win2008 server/IIS7

    - by Program.X
    I have a very odd problem. I have a web app that uses the .NET Membership API to provide login functionality. This works fine on my local dev machine, using WebDev 4.0 server. I'm using .NET 4.0 with some URL Rewriting, but not on the pages where login is required. I have a Windows Server 2008 with IIS7 However, the Membership API seemingly does not work on the server. I have set up remote debugging and the LoginUser.LoggedIn event of the LoginUser control gets fired okay, but the MembershipUser is null. I get no answer about the username/password being invalid so it seems to be recognising it. If I enter an invalid username/password, I get an invalid username/password response. Some code, if it helps: <asp:ValidationSummary ID="LoginUserValidationSummary" runat="server" CssClass="validation-error-list" ValidationGroup="LoginUserValidationGroup"/> <div class="accountInfo"> <fieldset class="login"> <legend>Account Information</legend> <p> <asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName">Username:</asp:Label> <asp:TextBox ID="UserName" runat="server" CssClass="textEntry"></asp:TextBox> <asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName" CssClass="validation-error" Display="Dynamic" ErrorMessage="User Name is required." ToolTip="User Name is required." ValidationGroup="LoginUserValidationGroup">*</asp:RequiredFieldValidator> </p> <p> <asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password">Password:</asp:Label> <asp:TextBox ID="Password" runat="server" CssClass="passwordEntry" TextMode="Password"></asp:TextBox> <asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password" CssClass="validation-error" Display="Dynamic" ErrorMessage="Password is required." ToolTip="Password is required." ValidationGroup="LoginUserValidationGroup">*</asp:RequiredFieldValidator> </p> <p> <asp:CheckBox ID="RememberMe" runat="server"/> <asp:Label ID="RememberMeLabel" runat="server" AssociatedControlID="RememberMe" CssClass="inline">Keep me logged in</asp:Label> </p> </fieldset> <p class="login-action"> <asp:Button ID="LoginButton" runat="server" CommandName="Login" CssClass="submitButton" Text="Log In" ValidationGroup="LoginUserValidationGroup"/> </p> and the code behind: protected void Page_Load(object sender, EventArgs e) { LoginUser.LoginError += new EventHandler(LoginUser_LoginError); LoginUser.LoggedIn += new EventHandler(LoginUser_LoggedIn); } void LoginUser_LoggedIn(object sender, EventArgs e) { // this code gets run so it appears logins work Roles.DeleteCookie(); // this behaviour has been removed for testing - no difference } void LoginUser_LoginError(object sender, EventArgs e) { HtmlGenericControl htmlGenericControl = LoginUser.FindControl("errorMessageSpan") as HtmlGenericControl; if (htmlGenericControl != null) htmlGenericControl.Visible = true; } I have "Fiddled" with the Login form reponse and I get the following Cookie-Set headers: Set-Cookie: ASP.NET_SessionId=lpyyiyjw45jjtuav1gdu4jmg; path=/; HttpOnly Set-Cookie: .ASPXAUTH=A7AE08E071DD20872D6BBBAD9167A709DEE55B352283A7F91E1066FFB1529E5C61FCEDC86E558CEA1A837E79640BE88D1F65F14FA8434AA86407DA3AEED575E0649A1AC319752FBCD39B2A4669B0F869; path=/; HttpOnly Set-Cookie: .ASPXROLES=; expires=Mon, 11-Oct-1999 23:00:00 GMT; path=/; HttpOnly I don't know what is useful here because it is obviously encrypted but I find the .APXROLES cookie having no value interesting. It seems to fail to register the cookie, but passes authentication

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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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  • ASP.NET MVC Custom Profile Provider

    - by Ben Griswold
    It’s been a long while since I last used the ASP.NET Profile provider. It’s a shame, too, because it just works with very little development effort: Membership tables installed? Check. Profile enabled in web.config? Check. SqlProfileProvider connection string set? Check.  Profile properties defined in said web.config file? Check. Write code to set value, read value, build and test. Check. Check. Check.  Yep, I thought the built-in Profile stuff was pure gold until I noticed how the user-based information is persisted to the database. It’s stored as xml and, well, that was going to be trouble if I ever wanted to query the profile data.  So, I have avoided the super-easy-to-use ASP.NET Profile provider ever since, until this week, when I decided I could use it to store user-specific properties which I am 99% positive I’ll never need to query against ever.  I opened up my ASP.NET MVC application, completed steps 1-4 (above) in about 3 minutes, started writing my profile get/set code and that’s where the plan broke down.  Oh yeah. That’s right.  Visual Studio auto-generates a strongly-type Profile reference for web site projects but not for ASP.NET MVC or Web Applications.  Bummer. So, I went through the steps of getting a customer profile provider working in my ASP.NET MVC application: First, I defined a CurrentUser routine and my profile properties in a custom Profile class like so: using System.Web.Profile; using System.Web.Security; using Project.Core;   namespace Project.Web.Context {     public class MemberPreferencesProfile : ProfileBase     {         static public MemberPreferencesProfile CurrentUser         {             get             {                 return (MemberPreferencesProfile)                     Create(Membership.GetUser().UserName);             }         }           public Enums.PresenceViewModes? ViewMode         {             get { return ((Enums.PresenceViewModes)                     ( base["ViewMode"] ?? Enums.PresenceViewModes.Category)); }             set { base["ViewMode"] = value; Save(); }         }     } } And then I replaced the existing profile configuration web.config with the following: <profile enabled="true" defaultProvider="MvcSqlProfileProvider"          inherits="Project.Web.Context.MemberPreferencesProfile">        <providers>     <clear/>     <add name="MvcSqlProfileProvider"          type="System.Web.Profile.SqlProfileProvider, System.Web,          Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"          connectionStringName="ApplicationServices" applicationName="/"/>   </providers> </profile> Notice that profile is enabled, I’ve defined the defaultProvider and profile is now inheriting from my custom MemberPreferencesProfile class.  Finally, I am now able to set and get profile property values nearly the same way as I did with website projects: viewMode = MemberPreferencesProfile.CurrentUser.ViewMode; MemberPreferencesProfile.CurrentUser.ViewMode = viewMode;

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