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The ASP.NET MVC Routing module is responsible for mapping incoming browser requests to particular MVC controller actions. When the ASP.NET MVC application launches, it registers one or more patterns with the framework's route table to tell the routing engine what to do with any requests that match those patterns. When the routing engine receives a request at runtime, it matches that request's URL against the URL patterns registered with it and gives the response according to a pattern match. ASP.NET introduced Routing to eliminate the need of mapping each URL with a physical file. Routing enables us to define ... Read More
In an ASP.NET MVC application, filters can be applied at three different levels to control the behavior of controllers and action methods. These levels determine the scope of filter application, from specific methods to the entire application. Action Method Level − Applies only to a specific action method Controller Level − Applies to all action methods within a controller Global Level − Applies to all controllers and action methods in the application Filter Application Levels Global Level Controller Level ... Read More
Indexers in C# allow objects to be accessed like arrays using the square bracket notation. C# 8.0 introduced the index from end operator (^) which provides a more intuitive way to access elements from the end of a collection or sequence. The ^ operator returns an index that is relative to the end of the sequence, making it the most compact and easiest way to access end elements compared to traditional methods like array.Length - 1. Syntax Following is the syntax for defining an indexer in a class − public returnType this[parameterType parameter] { ... Read More
The ChildActionOnly attribute in ASP.NET MVC C# restricts an action method to be accessible only through child requests from views using Html.Action() or Html.RenderAction() helpers. It prevents direct URL access to the action method, making it ideal for creating reusable partial components. Syntax Following is the syntax for using the ChildActionOnly attribute − [ChildActionOnly] public ActionResult ActionName() { // action logic return View(); } To invoke a child action from a view, use one of these helper methods − @Html.Action("ActionName", new { parameter = value }) ... Read More
The BitConverter class in C# provides static methods to convert base data types to byte arrays and vice versa. It handles the conversion between different data types and their byte representations, making it essential for low-level data manipulation, file I/O, and network communication. Key Methods Method Description GetBytes(Boolean) Returns the specified Boolean value as a byte array. GetBytes(Char) Returns the specified Unicode character value as an array of bytes. GetBytes(Double) Returns the specified double-precision floating-point value as an array of bytes. GetBytes(Int32) Returns the specified ... Read More
C# 8.0 introduces async streams, which enable asynchronous iteration over data that is generated or retrieved asynchronously. Unlike regular streams that return all data at once, async streams produce elements one at a time as they become available. Async streams use the IAsyncEnumerable interface and allow methods to use yield return with the async modifier. You can consume async streams using await foreach loops, which asynchronously wait for each element. Syntax Following is the syntax for declaring an async stream method − static async IAsyncEnumerable MethodName() { await SomeAsyncOperation(); ... Read More
Content negotiation in ASP.NET Web API is the process of selecting the best format for the response based on what the client can accept. When a client sends a request, it can specify its preferred response format using HTTP headers, and the server responds accordingly. The primary mechanism for content negotiation relies on several HTTP request headers that communicate the client's preferences to the server. HTTP Headers for Content Negotiation Accept − Specifies which media types are acceptable for the response, such as "application/json, " "application/xml, " or custom media types like "application/vnd.example+xml". Accept-Charset − Indicates ... Read More
To check if a HashSet and a specified collection share a common element, we use the Overlaps() method in C#. This method returns true if the HashSet shares at least one element with the specified collection, and false otherwise. Syntax Following is the syntax for the Overlaps() method − public bool Overlaps(IEnumerable other) Parameters other − The collection to compare with the current HashSet. Return Value Returns true if the HashSet and the specified collection share at least one common element; otherwise, false. Using Overlaps() with Integer HashSets ... Read More
To check if a SortedSet and a specified collection share common elements in C#, you can use the Overlaps() method. This method returns true if the SortedSet shares at least one element with the specified collection, otherwise it returns false. Syntax Following is the syntax for using the Overlaps() method − public bool Overlaps(IEnumerable other) Parameters other − The collection to compare with the current SortedSet. It can be any collection that implements IEnumerable. Return Value The method returns true if the SortedSet shares at least one element with ... Read More
ASP.NET Web API is a framework for building HTTP-based services that can be consumed by a broad range of clients including browsers, mobile applications, and desktop applications. It provides numerous advantages over traditional web services and other communication technologies. Key Advantages of ASP.NET Web API HTTP-Based Architecture Web API works seamlessly with HTTP protocols using standard HTTP verbs like GET, POST, PUT, and DELETE for CRUD operations. This makes it intuitive and follows REST principles − [HttpGet] public IActionResult GetUsers() { } [HttpPost] public IActionResult CreateUser([FromBody] User user) { } [HttpPut("{id}")] ... Read More