How can I define a Dynamic ViewModel property in MVC 3 inside an action filter?
I am looking to have something like but inside the ActionFilter and not in the controller:
[Code]....
I'm trying to get the current action method by this way.
ActionDescriptor actionDescriptor = filterContext.ActionDescriptor;
string actionName = actionDescriptor.ActionName;
var controllerType = filterContext.Controller.GetType();
var actionMethod = controllerType.GetMethod(actionName);
But if there're two action method with the same name, the AmbiguousMatchException will occur there. Without the ActionMethod property, how can I get the current action method now?
I have decorated my base controller with a couple of action filters. They work fine.
One of those filters sets up the request - does things like set the culture based on the domain, etc.
I also have a handful of actions that require authorization using the Authorize attribute.
My problem is that when an user attempts to request a page they are not authorized to access, the authorization filter kicks in and redirects them to a page telling them that they cannot vie the page.
The issue is that the action filters never run so the culture and other request data is never set. This effectively causes language to be wrong in the view and other data to be missing.
I know that authorization filters run first but my question is this: How can I design this such that I can ensure that certain methods are always run before the view is returned, regardless of the authorization.
does a action filter override a controller filter?
View 2 RepliesDoes any one know how to dynamically add ActionFilter to an Action?
View 3 RepliesI have a ViewModel that contains an EntityObject and when I use a HtmlHelper like this
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I have a viewmodel with a property of a model class type. I set some properties in the model class to be able to show it to the user but then when I make a post, the model gets validated. How to overcome this? I don't want to enforce the DataAnnotations contraint in this case....
public class TheViewModel
{
TheModel TheModel { get; set;}
}
[code]...
I have a viewmodel that i use for my view
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Notice that SelectionId is not decorated with [Required]. In my view, i use DropDownFor like this:
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I no longer get the error if i dont select anything, which is what i want - but no way to bind it to the id if the user does select something
I need to create a dynamic form using the already existing DB entries, from 3 different tables. I am trying to do this by inheriting ViewModel class, which is comprised of all the model instances (or List of instances of unknown count) within it.
When I inherit the ViewModel in the View Template, the dynamic form gets generated without any issues, and looks fine. The dynamic form is generated based on iterating over the calls for each required model instance in the ViewModel passed to the View.Each call uses a partial view of the instance to generate the form, and hence multiple iterations create multiple instances of the form.
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However, when I try to submit the form, the postback does not include the ViewModel object, but rather only the first model instance used in the form.
public static string SEARCH_STRING = "searchkey";
string key=Request.QueryString.Get(SEARCH_STRING);
How to change the above code to make SEARCH_STRING be accessed using a Property(get; set;) instead of a public variable
Is it possible to set the property of a server tag from a c# expression, i.e. something like <asp:TextBox Width='<%= [some c# expression] %>'/> I though this would be pretty straightforward, but I can't get such an expression to run.
View 2 RepliesI am trying to return different views with xml and json result when say -/API/Security/Authentication/login.xml is passed or
API/Security/Authentication/login.json is passed . I have adde mapped routes for this path.
I have used the ActionFilter attribute for the Login Action Result to automatically check for xml or json and then return the appropriate view.
what to put in the Login.aspx file to render appropriate xml or json based on the above url passed ?
The code is below:
[Code]....
I just learned about actionfilters yesterday and thought it would be great if i could put my meta data into a action filter and change the page title, page description etc from 1 location based on a value from the controller.
I've getting so far, but cannot seem to work out how to add the default value to the controller and pass that value to my actionfilter.
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How could i set compulsory property of a user control to be set when user adds user control to form.
View 1 RepliesI need to create application wide error handling mechanism. I was evaluating Action Filter for that matter. But- Action filter will just exectute against actions/controller- what about error at custom view engine or Extension method for HTML helper.: to handle them i need to implement traditional Asp.net mechanismCan anyone suggest best common approach which can handle error for all Controller, View, Model or custom helpers if any.
View 3 RepliesIf I have a Filter applied to a controller with a property defined as true.
Can I apply the same filter to one of its actions with value false to override the value for that specific action?
Is there a way to define my own querystring parameter in Dyanmic data rather then using something like
Edit.aspx?AccountID=1
I want to use something like this
Edit.aspx?id=1
I'm using Facebook SDK C# Library in Asp.Net 3.5 Application. When I'm trying to compile the code below give me the errors. As I know dynamic type using in 4.0 framework. So is anyway to rewrite it in order make it work? I have a reference to System.Core 3.5 but it's still not compiling
protected void Page_Load(object sender, EventArgs e)
{
if (Request.Params.AllKeys.Contains("signed_request"))
{
var result = FacebookSignedRequest.Parse(FacebookContext.Current.AppSecret, Request.Params["signed_request"]);
dynamic signedRequestValue = result.Data;
this.RegistrationData = signedRequestValue.registration;
}
else
{
Response.Redirect("~/");
}
}
protected dynamic RegistrationData { get; set; }
Error 1 Cannot define a class or member that utilizes 'dynamic' because the compiler required type 'System.Runtime.CompilerServices.DynamicAttribute' cannot be found. Are you missing a reference to System.Core.dll?
Error 2 Cannot define a class or member that utilizes 'dynamic' because the compiler required type 'System.Runtime.CompilerServices.DynamicAttribute' cannot be found. Are you missing a reference to System.Core.dll?
Is it possible to edit the content of a view from a action filter.
What I am working on is a Resourcemanager that I can use to manage
my style sheets, js and other resources. I want to be able to put
lines in the the view any where like Html.ResourceManager.AddScriptFile("MyScript")
or Html.ResourceManager.AddCSSFile("MyCSS")
and at the end of the view call Html.Render(); this would then place the content of my resources at this point. My problem is that I want to put the CSS stuff at the top of the view, but them problem is that it is renderend at the end of the view, so I tought that I could use a ActionFilter to move it to the top of the view.
1) What would be the best way to do this task ?
2) Is there any resources that describe the way that the MVC framework works in more detail ?
I have an app I am transitioning to MVC3 to see what the upgrade path is essentially. I've hit a snag. I believe I've run into a change that may be due to the changes for Dependency Injection in action filter attributes, but I have been unable to track down the cause, and the "correct" solution.This project uses StructureMap and NHibernate. The NHibernate session is started at the beginning of each request, and ends at the end of each request, thanks to a small module. This is just to give an idea of the stack involved...o I have a few custom Authorize attributes (Inheriting from AuthorizeAttribute) that perform some more complicated authorization logic for specific actions that they decorate. Part of their functionality involves using two repositories which they must either (a) have injected, or (b) get from the StructureMap ObjectFactory themselves. In MVC2 I was using option b, so that the CONSTRUCTOR of the attribute looked like this:
[Code]....
This worked fine, as in MVC2 the constructor was called each time the attribute was evaluated. This BREAKS in MVC3, where it would appear that this is no longer the case. Due to this apparent change, the FIRST time this attribute is evaluated, it runs fine, but each subsequent time, any calls in the repositories fails because it claims the NHibernate Session object hasn't been started! The reason being, as far as I can tell, that the CustomAuthorizeAttribute is created once, and then held in whatever state it exists in at that point for the lifetime of the application... Which means that the dependencies inside of it (Which SHOULD go out of scope at the end of each request, and be reinstantiated / fetched at the beginning of subsequent requests), are instead persisting with it becoming stale after the first evaluation.After banging my head against the desk for a few hours, I realized that simply moving these calls to the ObjectFactory into the AutorizeCore method made everything work again.Now, all of this was of course, a hack, because there wasn't a good easy to do real dependency injection into attributes in MVC2. I hear that is changed in MVC3, and I am wondering if this behavior is in response this change, and if so, what do I need to do to make this work?
I need to get an image url using FileUpload Control. When i do it in the explorer it shows all files to select. But i need to show only ".jpg,.gif" files. How can i do it.
View 3 RepliesI have a custom actionfilter that strips out the whitespaces before the html is rendered in browser and it is working fine. However I have been unable to unit test the custom action filter. Ideally I want to do an assert on the sample html that all whitespaces have been removed. Code looks something like this.
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I thought this would be easy and maybe it is but it's eluding me.
In an action filter (MVC 2) I want to add/edit one of the parameters for the type I'm passing to my action method.
I have an action method:
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Bar is a simple class for viewData:
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In my BarFilter action filter OnActionExecuting method I want to add a value for paramA which is not set by the view so that Bar will be fully populated in my Foo action method. I've tried various methods of adding values to ViewData, ModelState, Model etc. but I always get a null returned in Foo.
I must create a few DataLists programmatically. All of them will share the same ItemTemplate. Is it possible to define this ItemTemplate in .aspx file, using wizard etc, and then create DataList programmatically and assign this template? There is information in the internet how to define both ItemTemplate and DataList programmatically, but I want to define the ItemTemplate statically and only DataList programmatically and then assign the template to it.
The problem that I encounter is that ItemTemplate tag only works inside some control tag. It looks like it is impossible to define an ItemTemplate (like e.g. resource in Silverlight) not associated with any DataList, using the wizard and design tools, and then reference this template in code during runtime.
i want to create filter in action method for filtering particular user from my database for the login program....
View 2 Replies