IactionResult

چه از web api استفاده کنیم یا MVC controller این دوتا هر جفتشون از Controller base ارث بری میکنن و IACTION Result رو برمیگردونن

خوب اینجا داره میگه که خیلی دستمون بازه توی middleware ها هم pipeline سمت response و هم request از یه middleware دارن استفاده میکنن

IActionResult #ViewResult #jsonResult

IActionResult is an interface in ASP.NET Core MVC that represents the result of an action method in a controller. When an action method in a controller returns a result, it can return different types of responses, such as rendering a view, redirecting to another action, returning a JSON object, or sending a file. The IActionResult interface provides a common way to represent all of these possible outcomes.

Common Implementations of IActionResult:

Here are some common classes that implement IActionResult:

1. ViewResult:

   • Represents a rendered view.
   • Example: return View(model);

2. JsonResult:

   • Represents a JSON-formatted response.
   • Example: return Json(data);

3. RedirectResult:

   • Represents a redirection to another URL.
   • Example: return Redirect("https://example.com");

4. RedirectToActionResult:

   • Represents a redirection to another action within the same application.
   • Example: return RedirectToAction("ActionName");

5. ContentResult:

   • Represents a plain text response.
   • Example: return Content("Hello World");

6. FileResult:

   • Represents a response that contains a file (e.g., for download).
   • Example: return File(fileBytes, "application/pdf");

7. StatusCodeResult:

   • Represents a response with a specific HTTP status code.
   • Example: return StatusCode(404);

8. EmptyResult:

   • Represents a response that does not have any content.
   • Example: return new EmptyResult();

• Why Use IActionResult?

Using IActionResult as the return type in action methods gives you the flexibility to return different kinds of responses from the same method. It also adheres to the principle of programming to an interface, making your code more flexible and testable.

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