MVC means ?
MVC stands for Model View Controller.
It divides an application into 3 component roles which is based on a framework methodology.
These component roles are discussed briefly as follows:
i) Models : These component roles are used to maintain the state which is persisted inside the Database.
Example: we might have a Product class that is used to represent order data from the Products table inside SQL.
ii) Views : These component roles are used to display the user interface of the application, where this UI is created off of the model data.
Example: we might create an Product “Edit” view that surfaces textboxes, dropdowns and checkboxes based on the current state of a Product object.
iii) Controllers : These component roles are used for various purposes like handling end user interaction, manipulating the model, and ultimately choosing a view to render to display UI.
Note:
In a MVC application, the views are used only for displaying the information whereas the controllers are used for handling and responding to user input and interaction.
How can we plug an ASP.NET MVC into an existing ASP.NET application ?
We can combine ASP.NET MVC into an existing ASP.NET application by following the below procedure:
First of all, you have to add a reference to the following three assemblies to your existing ASP.NET application:
i) System.Web.Routing
ii) System.Web.Abstractions
iii) System.Web.Mvc
The ASP.NET MVC folder should be created after adding these assembly references.
Add the folder Controllers, Views, and Views | Shared to your existing ASP.NET application.
And then you have to do the necessary changes in web.config file.
For this you can refer to the below link:
http://www.packtpub.com/article/mixing-aspnet-webforms-and-aspnet-mvc
What are the advantages of using asp.net mvc ?
The main advantages of using asp.net mvc are as follows:
i) One of the main advantage is that it will be easier to manage the complexity as the application is divided into model,view and controller.
ii) It gives us the full control over the behavior of an application as it does not use view state or server-based forms.
iii) It provides better support for test-driven development (TDD).
iv) You can design the application with a rich routing infrastructure as it uses a Front Controller pattern that processes Web application requests through a single controller.
Explain about Razor View Engine ?
This Razor View engine is a part of new rendering framework for ASP.NET web pages.
ASP.NET rendering engine uses opening and closing brackets to denote code (<% %>), whereas Razor allows a cleaner, implied syntax for determining where code blocks start and end.
Example:
In the classic renderer in ASP.NET:
<ul>
<% foreach (var userTicket in Model)
{ %>
<li><%: userTicket.Value %></li>
<% } %>
</ul>
By using Razor:
<ul>
@foreach (var userTicket in Model)
{
<li>@userTicket.Value</li>
}
</ul>
Does the unit testing of an MVC application is possible without running controllers in an ASP.NET process ?
In an MVC application, all the features are based on interface. So, it is easy to unit test a MVC application.
And it is to note that, in MVC application there is no need of running the controllers for unit testing.
What is the use of a controller in an MVC applicatio ?
A controller will decide what to do and what to display in the view. It works as follows:
i) A request will be received by the controller
ii) Basing on the request parameters, it will decide the requested activities
iii) Basing on the request parameters, it will delegates the tasks to be performed
iv) Then it will delegate the next view to be shown
Mention some of the return types of a controller action method ?
An action method is used to return an instance of any class which is derived from ActionResult class.
Some of the return types of a controller action method are:
i) ViewResult : It is used to return a webpage from an action method
ii) PartialViewResult : It is used to send a section of a view to be rendered inside another view.
iii) JavaScriptResult : It is used to return JavaScript code which will be executed in the user’s browser.
iv) RedirectResult : Based on a URL, It is used to redirect to another controller and action method.
v) ContentResult : It is an HTTP content type may be of text/plain. It is used to return a custom content type as a result of the action method.
vi) JsonResult : It is used to return a message which is formatted as JSON.
vii) FileResult : It is used to send binary output as the response.
viii) EmptyResult : It returns nothing as the result.
Explain about 'page lifecycle' of ASP.NET MVC ?
The page lifecycle of an ASP.NET MVC page is explained as follows:
i) App Initialisation
In this stage, the aplication starts up by running Global.asax’s Application_Start() method.
In this method, you can add Route objects to the static RouteTable.Routes collection.
If you’re implementing a custom IControllerFactory, you can set this as the active controller factory by assigning it to the System.Web.Mvc.ControllerFactory.Instance property.
ii) Routing
Routing is a stand-alone component that matches incoming requests to IHttpHandlers by URL pattern.
MvcHandler is, itself, an IHttpHandler, which acts as a kind of proxy to other IHttpHandlers configured in the Routes table.
iii) Instantiate and Execute Controller
At this stage, the active IControllerFactory supplies an IController instance.
iv) Locate and invoke controller action
At this stage, the controller invokes its relevant action method, which after further processing, calls RenderView().
v) Instantiate and render view
At this stage, the IViewFactory supplies an IView, which pushes response data to the IHttpResponse object.
Explain about the formation of Router Table in ASP.NET MVC ?
The Router Table is formed by following the below procedure:
In the begining stage, when the ASP.NET application starts, the method known as Application_Start() method is called.
The Application_Start() will then calls RegisterRoutes() method.
This RegisterRoutes() method will create the Router table.
In an MVC application, what are the segments of the default route ?
There are 3 segments of the default route in an MVC application.They are:
The 1st segment is the Controller Name.
Example: search
The 2nd segment is the Action Method Name.
Example: label
The 3rd segment is the Parameter passed to the Action method.
Example: Parameter Id - MVC
What are the settings to be done for the Routing to work properly in an MVC application ?
The settings must be done in 2 places for the routing to work properly.They are:
i) Web.Config File : In the web.config file, the ASP.NET routing has to be enabled.
ii) Global.asax File : The Route table is created in the application Start event handler, of the Global.asax file.
Explain the advantages of using routing in ASP.NET MVC ?
Without using Routing in an ASP.NET MVC application, the incoming browser request should be mapped to a physical file.The thing is that if the file is not there, then you will get a page not found error.
By using Routing, it will make use of URLs where there is no need of mapping to specific files in a web site.
This is because, for the URL, there is no need to map to a file, you can use URLs that are descriptive of the user's action and therefore are more easily understood by users.
What are the things that are required to specify a route ?
There are 3 things that are required to specify a route.
i) URL Pattern : You can pass the variable data to the request handler without using a query string. This is done by including placeholders in a URL pattern.
ii) Handler : This handler can be a physical file of 2 types such as a .aspx file or a controller class.
iii) Name for the Route : This name is an optional thing.
Is the route {controller}{action}/{id} a valid route definition or not and why ?
{controller}{action}/{id} is not a valid route definition.
The reason is that, it has no literal value or delimiter between the placeholders.
If there is no literal, the routing cannot determine where to seperate the value for the controller placceholder from the value for the action placeholder.
Explain with examples for scenarios when routing is not applied ?
Below are the 2 scenarios where routing is not applied.
i) A Physical File is Found that Matches the URL Pattern - This default behaviour can be overriden by setting the RouteExistingFiles property of the RouteCollection object to true.
ii) Routing Is Explicitly Disabled for a URL Pattern - By using the RouteCollection.Ignore() method, you can prevent routing from handling certain requests.
Explain the usage of action filters in an MVC application ?
Action filter in an mvc application is used to perform some additional processing, such as providing extra data to the action method, inspecting the return value, or canceling execution of the action method.
Action filter is an attribute that implements the abstract FilterAttribute class.
Difference between Viewbag and Viewdata in ASP.NET MVC ?
Both are used to pass the data from controllers to views.
The difference between Viewbag and Viewdata in ASP.NET MVC is explained below:
View Data:
In this, objects are accessible using strings as keys.
Example:
In the Controller:
public ActionResult Index()
{
var softwareDevelopers = new List<string>
{
"Brendan Enrick",
"Kevin Kuebler",
"Todd Ropog"
};
ViewData["softwareDevelopers"] = softwareDevelopers;
return View();
}
In the View:
<ul>
@foreach (var developer in (List<string>)ViewData["softwareDevelopers"])
{
<li>
@developer
</li>
}
</ul>
An important note is that when we go to use out object on the view that we have to cast it since the ViewData is storing everything as object.
View Bag:
It will allow the objectto dynamically have the properties add to it.
Example:
In the Controller:
public ActionResult Index()
{
var softwareDevelopers = new List<string>
{
"Brendan Enrick",
"Kevin Kuebler",
"Todd Ropog"
};
ViewBag.softwareDevelopers = softwareDevelopers;
return View();
}
In the View:
<ul>
@foreach (var developer in ViewBag.softwareDevelopers)
{
<li>
@developer
</li>
}
</ul>
An important point to note is that there is no need to cast our object when using the ViewBag. This is because the dynamic we used lets us know the type.
Explain the usage of validation helpers in ASP.NET MVC ?
In ASP.NET MVC, validation helpers are used to show the validation error messages in a view.
The Html.ValidationMessage() and Html.ValidationSummary() helpers are used in the automatically generated Edit and Create views by the ASP.NET MVC.
To create a view, the following steps are to be followed:
i) In the product controller,right click on the Create() action and then select the option Add View.
ii) Now check the checkbox labeled in the Add View dialog and create a strongly-typed view.
iii) Select the product class from the View data class dropdownlist.
iv) Now, select Create from the view content dropdownlist.
v) Finally, click on the Add button.
Is it possible to create a MVC Unit Test application in Visual Studio Standard ?
No, It is not possible to create a MVC Unit Test application in Visual Studio Standard.
It is also not possible to create in Visual Studio Express.
It is possible to create only in Visual Studio Professional and Visual Studio Enterprise Versions.
What is Glimpse ?
It is an Open Source platform for gathers and presents detailed diagnostic information about the execution of your web application.It tells you exactly what's going on with each request.
We used in a similar manner to client side diagnostics and debugging tools like FireBug or Chrome Developer Tools.
It is used to reveal what is happening within your ASP.NET MVC and WebForms sites.
How to enable JQuery intellisense support in MVC?
By default, visual studio doesn't provide Jquery intellisense support, but it can be achieved by adding vsdoc.js file to razor view.
@if(false)
{
<script src="~/script/jquery-1.7.1-vsdoc.js" type="text/javascript"></script>
}
No te : If statement prevents the rendering of script tag into the Html source code and it used only by visual studio for Jquery intellisense support.
Difference between Asp.Net MVC and Webforms?
1. Asp.net Webform follows an event-driven development model whereas Asp.net Mvc follow Model, View, Controller design pattern.
2. Asp.net Webform has server controls whereas Asp.net Mvc has Html helpers for creating UI of application.
3.Asp.net Webforms has state management techniques whereas Asp.net Mvc doesn't have automatic state management techniques.
4. Asp.net Webform has file- based Urls means file name exists in Url whereas Asp.net Mvc has route-based Url.
5. In Asp.net webform, webforms(Aspx) are tightly coupled to code-behind (Aspx.cs) whereas in Asp.net Mvc, Views and logic are kept separately.
6. Asp.net Webform has Master page for consistent look and feel whereas in Asp.net Mvc layout is for this.
7. Asp.net Webform has User Controls for code re-usability whereas in Asp.net Mvc partial view is for this.
What is partial view in Asp.Net Mvc?
A partial view is like as user control in Asp.Net web form. Partial views are reusable views like as Header and Footer. It has .csHtml extension.
Partial and RenderPartial Html method renders partial view in Mvc razor.
<div>@Html.Partial("_Comments")</div>
<div>@ { Html.RenderPartial("_Comments") } </div>
What is cross site request forgery (CSRF) in web application?
Cross Site Request Forgery (CSRF) is a type of attack on the web application or on the website where a malicious user can insert or update data on behalf of the logged in user of the application by giving him a link that is not of the victim website but attackers own website.
In this type of attack the victim website user doesn't know that by clicking on malicious user link he is helping him to update malicious data into his website.
This generally happen by posting data on the victim website by a hidden form and submitting in using JavaScript or jQuery automatically.
How to avoid Cross Site Request Forgery (CSRF) in ASP.NET MVC?
To avoid Cross Site Request Forgery (CSRF) in ASP.NET MVC, you need to do two things.
1. Add [ValidateAntiForgeryTocken] attribute in the Controller Action method which is executing when the form data is being submitted.
2. Add @Html.AntiForgeryTocken() element in the HTML form.
What different types of Scaffold templates are there in ASP.NET MVC?
There are 6 different types of Scaffold templates in ASP.NET MVC that is used to create a view automatically based on the Model selected.
Empty:
It creates an empty view and only model type is specified in the View page using @model
Create:
It creates a view with a form that helps to create a new record for the model. It automatically generates a label and input field for each property in the Model.
Delete :
It creates a view with the list of records from the Model collection along with Delete link to delete records.
Details:
It creates a view that displays a lable and the value of each property of the Model.
Edit
It creates a view with a form for editing existing model data. It also generates a form with label and field for each property of the Model.
List:
It creates a view with html table that lists the model from the Model collection. It generates html table column for each property of the model. In general, it accepts IEnumerable<ModelType> and iterate through each item of the Enumerable collection. It automatically renders edit, delete links for each record of the Model collection in a column and Create link on the page that target to Create action.
What is the use of ViewStart in ASP.NET MVC?
In the default template of ASP.NET MVC, we get _ViewStart.cshtml page that is used to almost similar to MasterPage in ASP.NET Web Form or like a layout template.
The code of ViewStart executes before the actual view code executes. By default, _ViewStart template is applied to all view files of this or any sub directory under this directory.
The _ViewStart.cshtml file contains following code.
@{
Layout = "~/Views/Shared/_Layout.cshtml";
}
As this code runs before any view code so we have flexibility to specify a different Layout for a particular view.
Because this code runs before any view, a view can override the Layout property and choose a different
one.
How to write dashed attributes of html (5) element using ASP.NET MVC Helper methods?
To write dashed attribute of HTML element using ASP.NET MVC Helper methods, we replace "-" with "_" in the anonymous type parameter. eg.
@using (Html.BeginForm("Create", "Home", FormMethod.Post,
new { data_validatable=true }))
returns below output
<form action="/Home/Create" method="Post" data-validatable="true" >
Notice, the data-validate attribute of the form element.
What is the use of Html.ValidationSummary helper method in ASP.NET MVC?
The Html.ValidationSummary helper method is used to display all validation errors in the ModelState dictionary, either model property level or errors associated with ModelState.
Model Property level errors are errors that are set as an attributes of the property of the Model. eg
[Required]
[StringLength(100, ErrorMessage="The Title must not be more than 100 characters long.")]
public string Title { get; set; }
In the above code, the Title field is a mandatory field and can only accept 100 characters.
The ModelState level errors are errors that are set by developer in the Controller by using below code snippet.
ModelState.AddModelError("", "There is an error!");
In this case, the error will be displayed in place of Validation summary like this
<div class="validation-summary-errors"> <ul> <li>There is an error!</li> </ul> </div>
What should be the attribute for a Model property that corresponds to the Identity column of the database?
The attribute in the Model field for the Identity column of the database should be DatabaseGenerated(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity) like below
[Key]
[DatabaseGenerated(System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption.Identity)]
[Required]
public int CategoryId { get; set; }
Thanks
What is MVC?
MVC is a framework pattern that splits an application logic into three different roles: Model, View and Controller.
Model: Business entity on which overall application operates.MVC does not specifically mention the Data access layer as it is encapsulated by the model.
View: User interface that renders the model into a form of interaction.
Controller: Handles the request from the view and updates the model resulting in a change in model's state.
These are the three important classes(model, view and controller) required for MVC architecture.
What is ViewStart in MVC?
For group of views that all use the same layout, this can get a bit redundant and harder to maintain.
The _ViewStart.cshtml page can be used to remove this redundancy. The code within this file
is executed before the code in any view placed in the same directory. This fi le is also recursively applied to any view within a subdirectory.
When we create a default ASP.NET MVC project, we find there is already a _ViewStart
.cshtml fi le in the Views directory. It specifi es a default layout:
@{
Layout = "~/Views/Shared/_Layout.cshtml";
}
Because this code runs before any view, a view can override the Layout property and choose a different one. If a set of views shares common settings, the _ViewStart.cshtml file is a useful place to consolidate these common view settings. If any view needs to override any of the common settings, the view can set those values to another value.
How will the data gets passed between controller and views?
The controller gets the first hit and loads the model. Most of the time we would like to pass the model to the view for displaying data and so we use session variables, viewstate and so on. But the problem with using sessions or view state object is the scope. ASP.NET sessions have session scope and the view state have page scope. In MVC, we would like the data to be maintained when the hit comes to the controller and reaches the view and after that the scope of the data should expire.
That’s where the new session management technique has been introduced in the ASP.NET MVC framework, i.e., ViewData.
How to save data entered from front-end into a pdf file?
[HttpPost]
public ActionResult SaveResumeAsPdf(FormCollection fc)
{
if (Session["UserName"] != null)
{
BaseFont font = BaseFont.CreateFont(BaseFont.COURIER, BaseFont.CP1250, false);
PdfContentByte _pcb;
Document document = new Document();
try
{
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(Server.MapPath("~/Resumes/" + Session["UserName"] + ".pdf"), FileMode.Create));
document.Open();
_pcb = writer.DirectContent;
_pcb.BeginText();
_pcb.SetFontAndSize(font, 14);
int count = 30;
foreach (string item in fc.AllKeys)
{
_pcb.ShowTextAligned(PdfContentByte.ALIGN_LEFT, item, 50, 780 - count, 0);
_pcb.ShowTextAligned(PdfContentByte.ALIGN_LEFT, fc[item], 250, 780 - count, 0);
count = count + 30;
}
_pcb.EndText();
writer.Flush();
}
finally
{
document.Close();
}
}
}
Why do we use Repositories?
Repositories are minly used in MVC. It does not mean creating the database by itself or storing the data anywhere. It is just an approach in MVC. As we have n-tier architecture in asp.net, similarly repositories are a kind of architecture in MVC where we can create a repository class and write all the business logic in this class. We can just call this method from controller and there is no need to write any kind of business logic which makes our controller simple.
1. What is MVC?
MVC is a framework methodology that divides an application’s implementation into three component roles: models, views, and controllers.
Main components of an MVC application?
1. M - Model
2. V - View
3. C - Controller
“Models” in a MVC based application are the components of the application that are responsible for maintaining state. Often this state is persisted inside a database (for example: we might have a Product class that is used to represent order data from the Products table inside SQL).
“Views” in a MVC based application are the components responsible for displaying the application’s user interface. Typically this UI is created off of the model data (for example: we might create an Product “Edit” view that surfaces textboxes, dropdowns and checkboxes based on the current state of a Product object).
“Controllers” in a MVC based application are the components responsible for handling end user interaction, manipulating the model, and ultimately choosing a view to render to display UI. In a MVC application the view is only about displaying information – it is the controller that handles and responds to user input and interaction.
2- What does Model, View and Controller represent in an MVC application?
Model: Model represents the application data domain. In short the applications business logic is contained with in the model.
View: Views represent the user interface, with which the end users interact. In short the all the user interface logic is contained with in the UI.
Controller: Controller is the component that responds to user actions. Based on the user actions, the respective controller, work with the model, and selects a view to render that displays the user interface. The user input logic is contained with in the controller.
3- In which assembly is the MVC framework defined?
System.Web.Mvc
4- What is the greatest advantage of using asp.net mvc over asp.net webforms?
It is difficult to unit test UI with webforms, where views in mvc can be very easily unit tested.
5- Which approach provides better support for test driven development - ASP.NET MVC or ASP.NET Webforms?
ASP.NET MVC
6- What is Razor View Engine?
Razor view engine is a new view engine created with ASP.Net MVC model using specially designed Razor parser to render the HTML out of dynamic server side code. It allows us to write Compact, Expressive, Clean and Fluid code with new syntax to include server side code in to HTML.
7- What are the advantages of ASP.NET MVC?
Advantages of ASP.NET MVC:
1. Extensive support for TDD. With asp.net MVC, views can also be very easily unit tested.
2. Complex applications can be easily managed
3. Separation of concerns. Different aspects of the application can be divided into Model, View and Controller.
4. ASP.NET MVC views are light weight, as they don't use viewstate.
8- Is it possible to unit test an MVC application without running the controllers in an ASP.NET process?
Yes, all the features in an asp.net MVC application are interface based and hence mocking is much easier. So, we don't have to run the controllers in an ASP.NET process for unit testing.
9- What is namespace of ASP.NET MVC?
ASP.NET MVC namespaces and classes are located in the System.Web.Mvc assembly.
System.Web.Mvc namespace
Contains classes and interfaces that support the MVC pattern for ASP.NET Web applications. This namespace includes classes that represent controllers, controller factories, action results, views, partial views, and model binders.
System.Web.Mvc.Ajax namespace
Contains classes that support Ajax scripts in an ASP.NET MVC application. The namespace includes support for Ajax scripts and Ajax option settings.
System.Web.Mvc.Async namespace
Contains classes and interfaces that support asynchronous actions in an ASP.NET MVC application.
System.Web.Mvc.Html namespace
Contains classes that help render HTML controls in an MVC application. The namespace includes classes that support forms, input controls, links, partial views, and validation.
10- Is it possible to share a view across multiple controllers?
Yes, put the view into the shared folder. This will automatically make the view available across multiple controllers.
11- What is the role of a controller in an MVC application?
The controller responds to user interactions, with the application, by selecting the action method to execute and selecting the view to render.
12- Where are the routing rules defined in an asp.net MVC application?
In Application_Start event in Global.asax
13- Name a few different return types of a controller action method?
The following are just a few return types of a controller action method. In general an action method can return an instance of a any class that derives from ActionResult class.
1. ViewResult
2. JavaScriptResult
3. RedirectResult
4. ContentResult
5. JsonResult
14- What is the ‘page lifecycle’ of an ASP.NET MVC?
Following process are performed by ASP.Net MVC page:
1) App initialization
2) Routing
3) Instantiate and execute controller
4) Locate and invoke controller action
5) Instantiate and render view
15- What is the significance of NonActionAttribute?
In general, all public methods of a controller class are treated as action methods. If you want prevent this default behavior, just decorate the public method with NonActionAttribute.
16- What is the significance of ASP.NET routing?
ASP.NET MVC uses ASP.NET routing, to map incoming browser requests to controller action methods. ASP.NET Routing makes use of route table. Route table is created when your web application first starts. The route table is present in the Global.asax file.
17- How route table is created in ASP.NET MVC?
When an MVC application first starts, the Application_Start() method is called. This method, in turn, calls the RegisterRoutes() method. The RegisterRoutes() method creates the route table.
18- What are the 3 segments of the default route, that is present in an ASP.NET MVC application?
1st Segment - Controller Name
2nd Segment - Action Method Name
3rd Segment - Parameter that is passed to the action method
Example: http://google.com/search/label/MVC
Controller Name = search
Action Method Name = label
Parameter Id = MVC
19- ASP.NET MVC application, makes use of settings at 2 places for routing to work correctly. What are these 2 places?
1. Web.Config File : ASP.NET routing has to be enabled here.
2. Global.asax File : The Route table is created in the application Start event handler, of the Global.asax file.
20- What is the adavantage of using ASP.NET routing?
In an ASP.NET web application that does not make use of routing, an incoming browser request should map to a physical file. If the file does not exist, we get page not found error.
An ASP.NET web application that does make use of routing, makes use of URLs that do not have to map to specific files in a Web site. Because the URL does not have to map to a file, you can use URLs that are descriptive of the user's action and therefore are more easily understood by users.
21- What are the 3 things that are needed to specify a route?
1. URL Pattern - You can include placeholders in a URL pattern so that variable data can be passed to the request handler without requiring a query string.
2. Handler - The handler can be a physical file such as an .aspx file or a controller class.
3. Name for the Route - Name is optional.
22- Is the following route definition a valid route definition?
{controller}{action}/{id}
No, the above definition is not a valid route definition, because there is no literal value or delimiter between the placeholders. Therefore, routing cannot determine where to separate the value for the controller placeholder from the value for the action placeholder.
23- What is the use of the following default route?
{resource}.axd/{*pathInfo}
This route definition, prevent requests for the Web resource files such as WebResource.axd or ScriptResource.axd from being passed to a controller.
24- What is the difference between adding routes, to a webforms application and to an mvc application?
To add routes to a webforms application, we use MapPageRoute() method of the RouteCollection class, where as to add routes to an MVC application we use MapRoute() method.
25- How do you handle variable number of segments in a route definition?
Use a route with a catch-all parameter. An example is shown below. * is referred to as catch-all parameter.
controller/{action}/{*parametervalues}
26- What are the 2 ways of adding constraints to a route?
1. Use regular expressions
2. Use an object that implements IRouteConstraint interface
27- Give 2 examples for scenarios when routing is not applied?
1. A Physical File is Found that Matches the URL Pattern - This default behaviour can be overriden by setting the RouteExistingFiles property of the RouteCollection object to true.
2. Routing Is Explicitly Disabled for a URL Pattern - Use the RouteCollection.Ignore() method to prevent routing from handling certain requests.
28- What is the use of action filters in an MVC application?
Action Filters allow us to add pre-action and post-action behavior to controller action methods.
29- If I have multiple filters implemented, what is the order in which these filters get executed?
1. Authorization filters
2. Action filters
3. Response filters
4. Exception filters
30- What are the different types of filters, in an asp.net mvc application?
1. Authorization filters
2. Action filters
3. Result filters
4. Exception filters
31- Give an example for Authorization filters in an asp.net mvc application?
1. RequireHttpsAttribute
2. AuthorizeAttribute
32- Which filter executes first in an asp.net mvc application?
Authorization filter
33- What are the levels at which filters can be applied in an asp.net mvc application?
1. Action Method
2. Controller
3. Application
34- Is it possible to create a custom filter?
Yes
35- What filters are executed in the end?
Exception Filters
36- Is it possible to cancel filter execution?
Yes
37- What type of filter does OutputCacheAttribute class represents?
Result Filter
38- What are the 2 popular asp.net mvc view engines?
1. Razor
2. .aspx
39- What is difference between Viewbag and Viewdata in ASP.NET MVC?
The basic difference between ViewData and ViewBag is that in ViewData instead creating dynamic properties we use properties of Model to transport the Model data in View and in ViewBag we can create dynamic properties without using Model data.
40- What symbol would you use to denote, the start of a code block in razor views?
@
41- What symbol would you use to denote, the start of a code block in aspx views?
<%= %>
In razor syntax, what is the escape sequence character for @ symbol?
The escape sequence character for @ symbol, is another @ symbol
42- When using razor views, do you have to take any special steps to protect your asp.net mvc application from cross site scripting (XSS) attacks?
No, by default content emitted using a @ block is automatically HTML encoded to protect from cross site scripting (XSS) attacks.
43- When using aspx view engine, to have a consistent look and feel, across all pages of the application, we can make use of asp.net master pages. What is asp.net master pages equivalent, when using razor views?
To have a consistent look and feel when using razor views, we can make use of layout pages. Layout pages, reside in the shared folder, and are named as _Layout.cshtml
44- What are sections?
Layout pages, can define sections, which can then be overriden by specific views making use of the layout. Defining and overriding sections is optional.
45- What are the file extensions for razor views?
1. .cshtml - If the programming lanugaue is C#
2. .vbhtml - If the programming lanugaue is VB
46- How do you specify comments using razor syntax?
Razor syntax makes use of @* to indicate the begining of a comment and *@ to indicate the end.
47- What is Routing?
A route is a URL pattern that is mapped to a handler. The handler can be a physical file, such as an .aspx file in a Web Forms application. Routing module is responsible for mapping incoming browser requests to particular MVC controller actions.
48- Is it possible to combine ASP.NET webforms and ASP.MVC and develop a single web application?
Yes, it is possible to combine ASP.NET webforms and ASP.MVC and develop a single web application.
49. How do you avoid XSS Vulnerabilities in ASP.NET MVC?
Use the syntax in ASP.NET MVC instead of using .net framework 4.0.
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