Asp net when to use iactionresult and when to use iresult

Introduction

When with ASP.NET, developers often come across the question of when to use IActionResult and when to use IResult. Both of interfaces are used to a response from a controller method, but they have some differences that make them suitable for different scenarios. In this article, we will explore these differences and provide examples to help you understand when to use each .

IActionResult

IActionResult is an interface that represents a result of an action method in ASP.NET. It provides a way to return different types of results such as views, partial views, JSON, and more. It is the most commonly used interface for returning from controller actions.

Let's take a look at an example:


public IActionResult Index()
{
    return View();
}

In this example, the Index action method a View result. The View result represents an HTML view that will be rendered and returned to the client.

Another common use case for IActionResult is returning JSON data. Here's an example:


public IActionResult GetJsonData()
{
    var data = new { Name = "John", Age = 30 };
    return Json(data);
}

In this example, the GetJsonData action method returns a JSON result containing an anonymous with the properties Name and Age.

IResult

IResult is another interface that represents a result of an action method in ASP.NET. It is less commonly used compared to IActionResult, but it can be useful in certain scenarios.

One scenario where IResult can be useful is when you want to return a custom result type that doesn't fit into the predefined result types provided by IActionResult. Let's see an example:


public IResult CustomResult()
{
    var result = new CustomResult();
    // perform some custom logic
    return result;
}

In this example, the CustomResult action method returns a custom result type called CustomResult. This allows you to your own result types and return them from action methods.

Conclusion

In summary, IActionResult and IResult are both interfaces used to return responses from controller action methods in ASP.NET. IActionResult is the most commonly used interface and provides a way to return different types of results such as views and JSON. IResult, on the other hand, is less commonly used but can be useful when you want to return custom result types. By understanding the differences between these interfaces, you can choose the one for your specific scenario.

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