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  • Spring Web: Correct way to have a single default ViewResolver

    - by wuntee
    What is the best way to have every request be sent to a single ViewResolver - specifically in this case a JsonView? Was thinking this: <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.json.MappingJacksonJsonView" /> <property name="prefix" value="*" /> </bean> but, is there something better/easier?

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  • ASP.NET MVC : AJAX ActionLink - Persist Data

    - by Mio
    Hi guys, I'm really new at this and I was searching the web for an answer to my question and I couldn't find it, so here I am posting my question :) I'm trying to create a new record in my table Facility. For my goreign keys I'm displaying the choices in tables instead of a dropdowns. When the user clicks on the select link which is an Ajax.ActionLink(), I wanna retrieve the right record from the DB and set the foreign key of my object Facility to the one slected and replace the Div by a new Partial View. The problem is when I try to submit the form, the Facility object doesnt seem to have the foreign key that I've just set in my ajax fuction in my controller. And if the user has enter some data in the other fields of the create form, I don't them to lose what they already entered. Here's my code. Model only contains a Facility. public ActionResult Create() { Model.Facility = new Facility(); return View(Model); } This is part of my Create View <div id="FacilityTypePartialView"> <% Html.RenderPartial("FacilityType"); %> </div> This is my Partial View FacilityType <% if (Model.IsNewFacility()) { %> <p> Id: <%= Html.Encode(Model.Facility.FacilityType.FId)%> </p> <p> Type: <%= Html.Encode(Model.Facility.FacilityType.FType)%> </p> <p> Description: <%= Html.Encode(Model.Facility.FacilityType.FDescription) %> </p> <% } %> <p> <%= Html.ActionLink("Manage Facility Type", "Index","FacilityType") %> </p> <table id="FacilityTypesList"> <tr> <th> Select </th> <th> FId </th> <th> FType </th> <th> FDescription </th> </tr> <% foreach (var item in Model.GetFacilityTypes()) { %> <tr> <td> <%=Ajax.ActionLink("Select", "FacilityTypeSelect", new { id = item.FId}, new AjaxOptions { UpdateTargetId = "FacilityTypePartialView" })%> </td> <td> <%= Html.Encode(item.FId) %> </td> <td> <%= Html.Encode(item.FType) %> </td> <td> <%= Html.Encode(item.FDescription) %> </td> </tr> <% } %> </table> Here's y Ajax Funcion public PartialViewResult FacilityTypeSelect(int id) { Facility facility = new Facility(); facility.FacilityType = _repository.GetFacilityType(id); Model.Facility = facility; if (this.Request.IsAjaxRequest() == false) { return PartialView("FacilityType/FacilityType", Model); } else { return PartialView("FacilityType/FacilityTypeSelected", Model); } } Finally, my Post method [AcceptVerbs(HttpVerbs.Post)] public ActionResult Create( Facility facility) { Model.Facility = facility; if (ModelState.IsValid) { try { _repository.AddEntity(facility); _repository.Save(); return RedirectToAction("Details", new { id = facility.Id }); } catch { } } return View("Create", Model); } My Faciliy object coming from the View have the Facility.FacilityType set to nothing.

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  • ASP.MVC 1.0 complex ViewModel not populating on Action

    - by Graham
    Hi, I'm 3 days into learning MVC for a new project and i've managed to stumble my way over the multitude of issues I've come across - mainly about something as simple as moving data to a view and back into the controller in a type-safe (and manageable) manner. This is the latest. I've seen this reported before but nothing advised has seemed to work. I have a complex view model: public class IndexViewModel : ApplicationViewModel { public SearchFragment Search { get; private set; } public IndexViewModel() { this.Search = new SearchFragment(); } } public class SearchFragment { public string ItemId { get; set; } public string Identifier { get; set; } } This maps to (the main Index page): %@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<IndexViewModel>" %> <asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="server"> <% Html.BeginForm("Search", AvailableControllers.Search, FormMethod.Post); %> <div id="search"> <% Html.RenderPartial("SearchControl", Model.Search); %> </div> <% Html.EndForm(); %> </asp:Content> and a UserControl: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<SearchFragment>" %> <p> <label for="itemId"> <%= Html.Resource("ItemId") %></label> <%= Html.TextBox("itemId", Model.ItemId)%> </p> <p> <label for="title"> <%= Html.Resource("Title") %></label> <%= Html.TextBox("identifier", Model.Identifier)%> </p> <p> <input type="submit" value="<%= Html.Resource("Search") %>" name="search" /> </p> This is returned to the following method: [AcceptVerbs(HttpVerbs.Post)] public ActionResult Search(IndexViewModel viewModel) { .... } My problem is that when the view model is rehydrated from the View into the ViewModel, the SearchFragment elements are null. I suspect this is because the default model binder doesn't realise the HTML ItemId and Identifier elements rendered inline in the View map to the SearchFragment class. When I have two extra properties (ItemId and Identifier) in the IndexViewModel, the values are bound correctly. Unfortunately, as far as I can tell, I must use the SearchFragment as I need this to strongly type the Search UserControl... as the control can be used anywhere it can operate under any parent view. I really don't want to make it use "magic strings". There's too much of that going on already IMO. I've tried prefixing the HTML with "Search." in the hope that the model binder would recognise "Search.ItemId" and match to the IndexViewModel "Search" property and the ItemId within it, but this doesn't work. I fear I'm going to have to write my own ModelBinder to do this, but surely this must be something you can do out-of-the-box?? Failing that is there any other suggestions (or link to someone who has already done this?) Here's hoping....

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  • ASP.NET MVC 2 Hosting :: MVC2 deploy - Could not load file or assembly 'System.Web.MVC, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies.

    - by mbridge
    A new MVC 2 project worked on my local machine but when it was deployed to the test server it gave the error 'Could not load file or assembly 'System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies.' I have the full Visual Studio 2010 installed on my local machine but just the .NET 4 framework installed on the test servers. It seems the MVC assemblies do not come with .NET 4 framework itself so how to make MVC 2 work on the test servers? When I installed Visual Studio 2010 on my local machine it came with all the fruit included (.NET4 framework, MVC2 etc) so the System.Web.Mvc.dll can be found in my machine's GAC (C:\Windows\assembly). However, since there is no need to bloat the web servers only the plain old .NET4 framework has been installed on the test servers. This does NOT include the MVC assembly and that is why it cannot be found by the web application. You need this assembly to be on your web servers that you are deploying to but you want to avoid having to copy them into the GAC manually and doing all that gacutil mess or maybe you don't have access to your servers if they are hosted by provider. Solution You need to make the System.Web.Mvc assembly bin deployable... okay that doesn't sound easy but here is how to do it for the necessary MVC references: Simply right click the reference and select 'Properties' Then change 'Copy Local' to 'True': Note If your server has .NET 3.5 sp1 installed the new(ish) assemblies System.Web.Routing and System.Web.Abstractions will already be in the GAC. If you had previously deployed an MVC 1 application to a .NET 3.5 server you may remember having to deploy the other two assemblies too. Since MVC2 requires at least .NET 3.5 sp1 you will not need to worry about these assemblies, just System.Web.Mvc

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  • ASP.NET MVC tries to load older version of Owin assembly

    - by d_mcg
    As a bit of context, I'm developing an ASP.NET MVC 5 application that uses OAuth-based authentication via Microsoft's OWIN implementation, for Facebook and Google only at this stage. Currently (as of v3.0.0, git-commit 4932c2f), the FacebookAuthenticationOptions and GoogleOAuth2AuthenticationOptions don't provide any property to force Facebook nor Google respectively to reauthenticate users (via appending the appropriate query string parameters) when signing in. Initially, I set out to override the following classes: FacebookAuthenticationOptions GoogleOAuth2AuthenticationOptions FacebookAuthenticationHandler (specifically AuthenticateCoreAsync()) GoogleOAuth2AuthenticationHandler (specifically AuthenticateCoreAsync()) yet discovered that the ~AuthenticationHandler classes are marked as internal. So I pulled a copy of the source for the Katana project (http://katanaproject.codeplex.com/) and modified the source accordingly. After compiling, I found that there are several dependencies that needed updating in order to use these updated assemblies (Microsoft.Owin.Security.Facebook and Microsoft.Owin.Security.Google) in the MVC project: Microsoft.Owin Microsoft.Owin.Security Microsoft.Owin.Security.Cookies Microsoft.Owin.Security.OAuth Microsoft.Owin.Host.SystemWeb This was done by replacing the existing project references to the 3.0.0 versions and updating those in web.config. Good news: the project compiles successfully. In debugging, I received an exception on startup: An exception of type 'System.IO.FileLoadException' occurred in [MVC web assembly].dll but was not handled in user code Additional information: Could not load file or assembly 'Microsoft.Owin.Security, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) The underlying exception indicated that Microsoft.AspNet.Identity.Owin was trying to load v2.1.0 of Microsoft.Owin.Security when calling app.UseExternalSignInCookie() from Startup.ConfigureAuth(IAppBuilder app) in Startup.Auth.cs. Unfortunately that assembly (and its other dependency, Microsoft.AspNet.Identity.Owin) aren't part of the Project Katana solution, and I can't find any accessible repository for these assemblies online. Are the Microsoft.AspNet.Identity assemblies open source, like the Katana project? Is there a way to fool those assemblies to use the referenced v3.0.0 assemblies instead of v2.1.0? The /bin folder contains the 3.0.0 versions of the Owin assemblies. I've upgraded the NuGet packages for Microsoft.AspNet.Identity.Owin, and this is still an issue. Any ideas on how to resolve this issue?

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  • Asp.net MVC ModelState.Clear

    - by Mr Grok
    Can anyone give me a succinct definition of the role of ModelState in Asp.net MVC (or a link to one). In particular I need to know in what situations it is necessary or desirable to call ModelState.Clear(). Can anyone give me a succinct definition of the role of ModelState in Asp.net MVC (or a link to one). In particular I need to know in what situations it is necessary or desirable to call ModelState.Clear(). Bit open ended huh... sorry, I think it might help if tell you what I'm acutally doing: I have an Action of Edit on a Controller called "Page". When I first see the form to change the Page's details everything loads up fine (binding to a "MyCmsPage" object). Then I click a button that generates a value for one of the MyCmsPage object's fields (MyCmsPage.SeoTitle). It generates fine and updates the object and I then return the action result with the newly modified page object and expect the relevant textbox (rendered using <%= Html.TextBox("seoTitle", page.SeoTitle)%) to be updated ... but alas it displays the value from the old model that was loaded. I've worked around it by using ModelState.Clear() but I need to know why / how it has worked so I'm not just doing it blindly. PageController: [AcceptVerbs("POST")] public ActionResult Edit(MyCmsPage page, string submitButton) { // add the seoTitle to the current page object page.GenerateSeoTitle(); // why must I do this? ModelState.Clear(); // return the modified page object return View(page); } Aspx: <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<MyCmsPage>" %> .... <div class="c"> <label for="seoTitle"> Seo Title</label> <%= Html.TextBox("seoTitle", page.SeoTitle)%> <input type="submit" value="Generate Seo Title" name="submitButton" /> </div>

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  • How to use multiple DisplayName attribute using Entity Framework and ASP.Net Mvc 2

    - by Picflight
    Depending on where I use my Class, I want to be able to show a different DisplayName. I have the following class: [MetadataType(typeof(PortalMetaData))] [System.Web.Mvc.Bind(Exclude = "PortalId")] public partial class Portal { public Portal() { this.Created = DateTime.Now; } } public class PortalMetaData { [Required(ErrorMessage = "Portal name is required")] [StringLength(50, ErrorMessage = "Portal name must be under 50 characters")] public object PortalName { get; set; } [Required(ErrorMessage = "Description is required")] public object Description { get; set; } } I have a corresponding Table in the database Portal I use the Portal table with a PortalController for the Site Admin to update the records in the Portal Table. I want another user with a different Role (AsstAdmin) to be able to update this table as well. To facilitate that I am thinking of creating a separate partial class that somehow links back to the Portal Model. This would allow me to display limited Fields for update by the AsstAdmin and I can display a different name for the Field as well. How can I accomplish this task? If I add the following class which inherits from Portal than I get an exception: Unable to cast object of type 'Project1.Mvc.Models.Portal' to type 'Prpject1.Mvc.Models.Site'. [MetadataType(typeof(SiteMetaData))] public class Site : Portal { public Site() { } } public class SiteMetaData { [Required(DisplayName = "Site Description")] public object Description { get; set; } }

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  • Restlet vs Spring MVC for Restful web service

    - by zachariahyoung
    I'm researching how best to create a Restful web service on Google app engine. My end goal is to have an Android application call a web service on GAE to post and get data. At this point I not sure what the best approach is. What I know at this point is Spring MVC 3 provide the ability to create web service but it does not provide a full implementation of JAX-RS. I also have read a few blog that talk about how Spring and Restlet can be integrated together. On the other side I have read that I could only use Restlet in GAE. I would also like provide a light web interface for users to view their posted data So my questions are the following. 1. Should I just use Restlet. 2. Should I just use Spring MVC to provide my Restful web service. 3. Should I use Spring and Restlet together. At this point I think I should invest my time in Restlet because that seems to be the best approach for calling web services in Android. I'm also debating if Spring MVC is just over kill. Any thoughts would be helpful.

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  • asp.net MVC 1.0 and 2.0 currency model binding

    - by David Liddle
    I would like to create model binding functionality so a user can enter ',' '.' etc for currency values which bind to a double value of my ViewModel. I was able to do this in MVC 1.0 by creating a custom model binder, however since upgrading to MVC 2.0 this functionality no longer works. Does anyone have any ideas or better solutions for performing this functionality? A better solution would be to use some data annotation or custom attribute. public class MyViewModel { public double MyCurrencyValue { get; set; } } A preferred solution would be something like this... public class MyViewModel { [CurrencyAttribute] public double MyCurrencyValue { get; set; } } Below is my solution for model binding in MVC 1.0. public class MyCustomModelBinder : DefaultModelBinder { public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext) { object result = null; ValueProviderResult valueResult; bindingContext.ValueProvider.TryGetValue(bindingContext.ModelName, out valueResult); bindingContext.ModelState.SetModelValue(bindingContext.ModelName, valueResult); if (bindingContext.ModelType == typeof(double)) { string modelName = bindingContext.ModelName; string attemptedValue = bindingContext.ValueProvider[modelName].AttemptedValue; string wantedSeperator = NumberFormatInfo.CurrentInfo.NumberDecimalSeparator; string alternateSeperator = (wantedSeperator == "," ? "." : ","); try { result = double.Parse(attemptedValue, NumberStyles.Any); } catch (FormatException e) { bindingContext.ModelState.AddModelError(modelName, e); } } else { result = base.BindModel(controllerContext, bindingContext); } return result; } }

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  • How to clone a Model using Entity Framework and ASP.Net Mvc 2

    - by Picflight
    I have the following class: [MetadataType(typeof(PortalMetaData))] [System.Web.Mvc.Bind(Exclude = "PortalId")] public partial class Portal { public Portal() { this.Created = DateTime.Now; } } public class PortalMetaData { [Required(ErrorMessage = "Portal name is required")] [StringLength(50, ErrorMessage = "Portal name must be under 50 characters")] public object PortalName { get; set; } [Required(ErrorMessage = "Description is required")] public object Description { get; set; } } I have a corresponding Table in the database Portal I use the Portal table with a PortalController for the Site Admin to update the records in the Portal Table. I want another user with a different Role (AsstAdmin) to be able to update this table as well. To facilitate that I am thinking of creating a separate partial class that somehow links back to the Portal Model. This would allow me to display limited Fields for update by the AsstAdmin and I can display a different name for the Field as well. How can I accomplish this task? If I add the following class which inherits from Portal than I get an exception: Unable to cast object of type 'Project1.Mvc.Models.Portal' to type 'Prpject1.Mvc.Models.Site'. [MetadataType(typeof(SiteMetaData))] public class Site : Portal { public Site() { } } public class SiteMetaData { [Required(DisplayName = "Site Description")] public object Description { get; set; } }

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  • ASP.NET MVC 2.0 Validation and ErrorMessages

    - by Raj Aththanayake
    I need to set the ErrorMessage property of the DataAnnotation's validation attribute in MVC 2.0. For example I should be able to pass an ID instead of the actual error message for the Model property, for example... [StringLength(2, ErrorMessage = "EmailContentID")] [DataType(DataType.EmailAddress)] public string Email { get; set; } Then use this ID ("EmailContentID") to retrieve some content(error message) from a another service e.g database. Then the error error message is displayed to the user instead of the ID. In order to do this I need to set the DataAnnotation validation attribute’s ErrorMessage property. It seems like a stright forward task by just overriding the DataAnnotationsModelValidatorProvider‘s protected override IEnumerable GetValidators(ModelMetadata metadata, ControllerContext context, IEnumerable attributes) However it is complicated now.... A. MVC DatannotationsModelValidator’s ErrorMessage property is readonly. So I cannot set anything here B. System.ComponentModel.DataAnnotationErrorMessage property(get and set) which is already set in MVC DatannotationsModelValidator so I cannot set it again. If I try to set it I get “The property cannot set more than once…” error message. public class CustomDataAnnotationProvider : DataAnnotationsModelValidatorProvider { protected override IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, ControllerContext context, IEnumerable<Attribute> attributes) { IEnumerable<ModelValidator> validators = base.GetValidators(metadata, context, attributes); foreach (ValidationAttribute validator in validators.OfType<ValidationAttribute>()) { messageId = validator.ErrorMessage; validator.ErrorMessage = "Error string from DB And" + messageId ; } //...... } } Can anyone please give me the right direction on this? Thanks in advance.

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  • Getting started with Spring 3 Web MVC - Setting everything up

    - by user126379
    Hi, I'm trying to get started with JAVA/Eclipse/Spring MVC but can't seem to find a "dummies" or "step-by-step" guide for setting everything up and creating the simplest proof-of-concept application. I found http://static.springsource.org/docs/...-step-by-step/ but there seem to be differences between Spring 2.5 and Spring 3 so i'm looking for something for Spring 3. Also, the tutorial for Spring 2.5 focuses on building the application usign Ant - This i will certainly be doing for releasing but when working within Eclipse i want to have set up the project so that i can use breakpoints/debugging and this is not covered at all. I've downloaded Eclipse, Tomcat and the Spring 3 Framework but that's about it and within the downloaded Spring Framework documentation it states: 2.3 New getting started tutorial There is now a new getting started tutorial for developing a basic Spring 3.0 MVC web application. This tutorial is a separate document that can be found at the Spring Documentation page However, i can't seem to find such a tutorial on the linked page. My main problem at the moment, as seems to be the case for many people trying to get started with Spring, is that i can't seem to get everything set up. I've got a copy of Expert Spring MVC and Web Flow and i've also found this tutorial but i don't know if the setups they describe are still relevant and whether they will allow debugging. Can anyone please give some direction? Thanks

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  • Asp.Net MVC 2 - Iterate Through Form Values In Model Binder

    - by Noob
    I have a list of items in my form which are named like this... <input type="text" id="ListItem1"> <input type="text" id="ListItem2"> <input type="text" id="ListItem3"> I want to create a custom model binder which converts these in to model with this structure... public class MyModel { public IEnumerable<MyModelItem> Items {get; set;} } public class MyModelItem { public int Id { get; set; } public string Value { get; set; } } So each ListItem should be converted to a MyModelItem with id equal to the number at the end of the input id and value set to the value on the input field. In ASP.Net MVC 1.0 I could iterate over the bindingContext.ValueProvider.Keys collection and check for key.StartsWith("ListItem") to find all input items in this format. The new IValueProvider interface in ASP.Net MVC 2 does not have a keys collection and I cannot iterate over that interface. How can I access these values which I only know the prefix for at design time in ASP.Net MVC 2?

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  • .Net MVC UserControl - Form values not mapped to model

    - by Andreas
    Hi I have a View that contains a usercontrol. The usercontrol is rendered using: <% Html.RenderPartial("GeneralStuff", Model.General, ViewData); %> My problem is that the usercontrol renders nicely with values from the model but when I post values edited in the usercontrol they are not mapped back to Model.General. I know I can find the values in Request.Form but I really thought that MVC would manage to map these values back to the model. My usercontrol: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<namespace.Models.GeneralViewModel>" %> <fieldset> <div> <%= Html.LabelFor(model => model.Value)%> <%= Html.TextBoxFor(model => model.Value)%> </div> </fieldset> I'm using .Net MVC 2 Thanks for any help!

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  • Trying to build a Drupal-like CMS in ASP.NET MVC - Newbie Questions

    - by user252160
    I am new to ASP.NET MVC, and the ASP.NET technology in general, so, please, excuse the stupidity of my questions. I have a lot of experience with php development and CMS customization (Drupal and Wordpress mainly), and I wanted to know whether some techniques could be applied in asp.net mvc. I want to know what exactly could be modified without recompiling an already built application Can I edit the views without recompiling the app. Can I create custom themes ? Can I add plugins compiled as dlls and use them at runtime. Can I "mark" the assembly in such a way that the web application will check on the next request and will reference it, without me manually adding it to the project and recompiling. I've heard that this is possible. I will make sure to add more when something comes up. The reason I am asking is because I'd like to try and develop a Drupal-like CMS (custom types, views, etc) in asp.net mvc. The dynamism of php will be quite a challenge to replicate in a compiled technology, yet I am ready to try.

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  • Why does calling abort() on ajax request cause error in ASP.Net MVC (IE8)

    - by user169867
    I use jquery to post to an MVC controller action that returns a table of information. The user of the page triggers this by clicking on various links. In the event the user decides to click a bunch of these links in quick succession I wanted to cancel any previous ajax request that may not have finished. I've found that when I do this (although its fine from the client's POV) I will get errors on the web application saying that "The parameters dictionary contains a null entry for parameter srtCol of non-nullable type 'System.Int32'" Now the ajax post deffinately passes in all the parameters, and if I don't try and cancel the ajax request it works just fine. But if I do cancel the request by calling abort() on the XMLHttpRequest object that ajax() returns before it finishes I get the error from ASP.Net MVC. Example: //Cancel any pevious request if (req) { req.abort(); req = null; } //Make new request req= $.ajax({ type: 'POST', url: "/Myapp/GetTbl", data: {srtCol: srt, view: viewID}, success: OnSuccess, error: OnError, dataType: "html" }); I've noticed this only happen is IE8. In FF it seems to not cuase a problem. Does anyone know how to cancel an ajax request in IE8 without causing errors for MVC? Thanks for any help.

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  • Render label for a field inside ASP.NET MVC 2 editor templates

    - by artvolk
    I'm starting to use DataAnnotations in ASP.NET MVC and strongly typed template helpers. Now I have this in my views (Snippet is my custom type, Created is DateTime): <tr> <td><%= Html.LabelFor(f => Model.Snippet.Created) %>:</td> <td><%= Html.EditorFor(f => Model.Snippet.Created)%></td> </tr> The editor template for DateTime is like this: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<System.DateTime>" %> <%=Html.TextBox("", Model.ToString("g"))%> But now I want to put inside editor template the whole <tr>, so I'd like to have just this in my view: <%= Html.EditorFor(f => Model.Snippet.Created)%> And something like this in editor template, but I don't know how to render for for label attribute, it should be Snippet_Created for my example, the same as id\name for textbox, so pseudo code: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<System.DateTime>" %> <tr> <td><label for="<What to place here???>"><%=ViewData.ModelMetadata.DisplayName %></label></td> <td><%=Html.TextBox("", Model.ToString("g"))%></td> </tr> The Html.TextBox() have the first parameter empty and id\name for textbox is generated corectly. Thanks in advance!

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  • Write binary data as a response in an ASP.NET MVC web control

    - by Lou Franco
    I am trying to get a control that I wrote for ASP.NET to work in an ASP.NET MVC environment. Normally, the control does the normal thing, and that works fine Sometimes it needs to respond by clearing the response, writing an image to the response stream and changing the content type. When you do this, you get an exception "OutputStream is not available when a custom TextWriter is used". If I were a page or controller, I see how I can create custom responses with binary data, but I can't see how to do this from inside a control's render functions. To simplify it -- imagine I want to make a web control that renders to: <img src="pageThatControlIsOn?controlImage"> And I know how to look at incoming requests and recognize query strings that should be routed to the control. Now the control is supposed to respond with a generated image (content-type: image/png -- and the encoded image). In ASP.NET, we: Response.Clear(); Response.OutputStream.Write(thePngData); // this throws in MVC // set the content type, etc Response.End(); How am I supposed to do that in an ASP.NET MVC control?

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  • Proper way to validate model in ASP.NET MVC 2 and ViewModel apporach

    - by adrin
    I am writing an ASP.NET MVC 2 application using NHibernate and repository pattern. I have an assembly that contains my model (business entities), moreover in my web project I want to use flattened objects (possibly with additional properties/logic) as ViewModels. These VMs contain UI-specific metadata (eg. DisplayAttribute used by Html.LabelFor() method). The problem is that I don't know how to implement validation so that I don't repeat myself throughout various tiers (specifically validation rules are written once in Model and propagated to ViewModel). I am using DataAnnotations on my ViewModel but this means no validation rules are imposed on the Model itself. One approach I am considering is deriving ViewModel objects from business entities adding new properties/overriding old ones, thus preserving validation metadata between the two however this is an ugly workaround. I have seen Automapper project which helps to map properties, but I am not sure if it can handle ASP.NET MVC 2 validation metadata properly. Is it difficult to use custom validation framework in asp.net mvc 2? Do you have any patterns that help to preserve DRY in regard to validation?

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  • Registering custom webcontrol inside mvc view?

    - by kastermester
    I am in the middle of a project where I am migrating some code for a website from WebForms to MVC - unfortunatly there's not enough time to do it all at once, so I will have to do some... not so pretty solutions. I am though facing a problems with a custom control I have written that inherits from the standard GridView control namespace Controls { public class MyGridView : GridView { ... } } I have added to the web.config file as usual: <configuration> ... <system.web> ... <pages> ... <controls> ... <add tagPrefix="Xui" namespace="Controls"/> </controls> </pages> </system.web> </configuration> Then on the MVC View: <Xui:MyGridView ID="GridView1" runat="server" ...>...</Xui:MyGgridView> However I am getting a parser error stating that the control cannot be found. I am suspecting this has to do with the mix up of MVC and WebForms, however I am/was under the impression that such mixup should be possible, is there any kind of tweak for this? I realise this solution is far from ideal, however there's no time to "do the right thing". Thanks

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  • MVC nhibernate entiry mapping for dropdown list

    - by Rod McLeay
    Hi, I have a dropdown list on an ASP.NET MVC project that I am pretty sure is not binding to my model because of my nhibernate mapping. I have tried many variations on the asp mvc side resulting in this post here. MVC side of things seems fine I believe the issue may be that my object is trying to bind, but my mapping is out of whack. My mapping is: <many-to-one name="Project" lazy="false" class="AgileThought.ERP.Domain.Property.Project" column="ProjectGUID" /> My View gives an error saying that the GUID from the dropdownList selected value is not valid. Which I think may be that it is trying to push the GUID into my related project object. The value 'fd38c877-706f-431d-b624-1269184eeeb5' is invalid. My related project list binds to the dropdown list just fine, it is just not binding to my models Project entity. Does the related Project entity need to know about its relationship? Its really just a lookup list. Many thanks for your time and best regards, Rod

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  • model view controller question

    - by songBong
    Hi, I've been working on my iphone game recently and came across a forked road when deciding the design of my various classes. So far I've adhered to the MVC pattern but the following situation had me confused: I have 4 buttons displayed visually. Each button though consists of a container UIView (which I've subclassed) and 2 UIButtons (also subclassed) as subviews. When you press a button, it does the flip effect plus other stuff. The user input is using target-action from my container UIView to my controller. This part is ok, the following part is the debatable part: So I've subclassed the container view as well as the UIButtons and I need to add more data/methods (somewhere) to do more things. Putting data that needs to be serialized and non-rendering related code in the view classes seems to break the MVC design but at the moment, it makes the most sense to me to put it there. It's almost like my subclassed views are their own little MVC's and it seems neat. Separating out the data/methods from the view to my main controller in this case seems unnecessary and a more work. How should I be doing it? Thanks heaps.

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  • Creating an API for an ASP.NET MVC site with rate-limiting and caching

    - by Maxim Z.
    Recently, I've been very interested in APIs, specifically in how to create them. For the purpose of this question, let's say that I have created an ASP.NET MVC site that has some data on it; I want to create an API for this site. I have multiple questions about this: What type of API should I create? I know that REST and oData APIs are very popular. What are the pros and cons of each, and how do I implement them? From what I understand so far, REST APIs with ASP.NET MVC would just be actions that return JSON instead of Views, and oData APIs are documented here. How do I handle writing? Reading from both API types is quite simple. However, writing is more complex. With the REST approach, I understand that I can use HTTP POST, but how do I implement authentication? Also, with oData, how does writing work in the first place? How do I implement basic rate-limiting and caching? From my past experience with APIs, these are very important things, so that the API server isn't overloaded. What's the best way to set these two things up? Can I get some sample code? Any code that relates to C# and ASP.NET MVC would be appreciated. Thanks in advance! While this is a broad question, I think it's not too broad... :) There are some similar questions to this one that are about APIs, but I haven't found any that directly address the questions I outlined here.

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  • Implementing a normal website inside ASP.NET MVC 2

    - by cc0
    I have a website consisting of an index.html, a number of style sheet files as well as some javascript files. Then I needed a way for this site to communicate efficiently with a Microsoft SQL Server, so I was recommended to use the MVC framework to facilitate that kind of communication. I created the C#.net controller code needed to output the necessary information from the database using URL parameters, so now I am trying to put the whole web-site together inside the MVC framework. I started an empty project-template in MVC 2 framework. I'm sure there must be a good way to implement the current code into this framework, but I am very uncertain as to what the best approach to this would be. Could anyone point me in the right direction here? I'm not sure whether I need to change any of the current HTML, or exactly what to add to it. I'd love to see some kind of guide or tutorial, or just any advice I can get as I try to learn this. Any help is very much appreciated!

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