Returning http status code from Web Api controller in C#

Returning http status code from Web Api controller in C#

To return an HTTP status code from a Web API controller in C#, you can use the IHttpActionResult interface, which provides methods to create and return HTTP responses.

Here are some examples of how to return HTTP status codes from a Web API controller in C#:

1. Return a BadRequest status code (400):

 public IHttpActionResult MyMethod() { // Validation failed return BadRequest("The request is invalid"); }

2. Return a NotFound status code (404):

 public IHttpActionResult MyMethod(int id) { // Resource not found return NotFound("The resource with ID " + id + " was not found"); }

3. Return a Created status code (201) with a location header:

 public IHttpActionResult MyMethod() { // Resource created successfully string location = "http://localhost/api/myresource/123"; return Created(location, "The resource was created successfully"); }

4. Return a InternalServerError status code (500):

 public IHttpActionResult MyMethod() { // An error occurred return InternalServerError(new Exception("An error occurred while processing the request")); }

Note that you can also return other HTTP status codes using the StatusCode method of the ApiController class:

 public IHttpActionResult MyMethod() { // Custom status code return StatusCode(HttpStatusCode.NoContent); }

The HttpStatusCode enumeration provides a list of all HTTP status codes that you can use in your Web API controller.

Examples

  1. "Web API C# return HTTP status code in action"

    • Description: Users often look for examples on how to explicitly return HTTP status codes from a Web API controller in C#. This query aims to provide insights into implementing such scenarios.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpGet] public IActionResult MyAction() { // Your logic here if (/* Condition */) { return Ok(/* Your Data */); } else { return StatusCode(400, "Bad Request Message"); } } }

  2. "C# Web API return specific status code"

    • Description: Users may want to know how to return a specific HTTP status code from a Web API action in C#. This query aims to provide examples and explanations.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpGet] public IActionResult MyAction() { // Your logic here if (/* Condition */) { return Ok(/* Your Data */); } else { return StatusCode(404, "Not Found Message"); } } }

  3. "C# Web API handle error and return status code"

    • Description: Users might be interested in handling errors within a Web API action and returning the appropriate HTTP status code. This query targets examples and best practices.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpGet] public IActionResult MyAction() { try { // Your logic here if (/* Condition */) { return Ok(/* Your Data */); } else { return StatusCode(500, "Internal Server Error Message"); } } catch (Exception ex) { return StatusCode(500, $"Internal Server Error: {ex.Message}"); } } }

  4. "Web API C# return custom status code"

    • Description: Users may want to return custom HTTP status codes from a Web API controller. This query focuses on how to implement and use custom status codes.
    • Code:
      public class CustomStatusCodes { public const int MyCustomCode = 601; } [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpGet] public IActionResult MyAction() { // Your logic here if (/* Condition */) { return Ok(/* Your Data */); } else { return StatusCode(CustomStatusCodes.MyCustomCode, "Custom Status Message"); } } }

  5. "C# Web API return status code with message"

    • Description: Users might be specifically looking for examples on how to return an HTTP status code along with a descriptive message from a Web API action in C#.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpGet] public IActionResult MyAction() { // Your logic here if (/* Condition */) { return Ok(/* Your Data */); } else { return StatusCode(403, "Forbidden: Access Denied"); } } }

  6. "C# Web API return 404 status code"

    • Description: Users might be specifically interested in examples of returning a 404 Not Found status code from a Web API action in C#.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpGet] public IActionResult MyAction(int id) { // Your logic here if (/* Item Found */) { return Ok(/* Your Data */); } else { return NotFound("Resource not found"); } } }

  7. "C# Web API return 201 status code"

    • Description: Users might be specifically interested in examples of returning a 201 Created status code from a Web API action in C#.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpPost] public IActionResult CreateResource([FromBody] MyModel model) { // Your creation logic here if (/* Resource created successfully */) { return StatusCode(201, "Resource created successfully"); } else { return StatusCode(500, "Failed to create resource"); } } }

  8. "Web API C# return 204 status code"

    • Description: Users may be specifically interested in examples of returning a 204 No Content status code from a Web API action in C#.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpDelete] public IActionResult DeleteResource(int id) { // Your deletion logic here if (/* Resource deleted successfully */) { return NoContent(); } else { return StatusCode(500, "Failed to delete resource"); } } }

  9. "C# Web API return 401 status code"

    • Description: Users might be specifically interested in examples of returning a 401 Unauthorized status code from a Web API action in C#.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpGet] [Authorize] public IActionResult SecureResource() { // Your secure resource logic here return Ok(/* Your Data */); } }

  10. "C# Web API return 429 status code"

    • Description: Users may be specifically interested in examples of returning a 429 Too Many Requests status code from a Web API action in C#.
    • Code:
      [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { [HttpGet] public IActionResult ThrottleRequests() { // Your logic here if (/* Too many requests */) { return StatusCode(429, "Too Many Requests: Try again later"); } else { return Ok(/* Your Data */); } } }

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