2.6 KiB
Implement the other CRUD operations
We'll add Create, Update, and Delete methods to the controller. These are variations on a theme, so I'll just show the code and highlight the main differences. Build the project after adding or changing code.
Create
[!code-csharpMain]
This is an HTTP POST method, indicated by the [HttpPost] attribute. The [FromBody] attribute tells MVC to get the value of the to-do item from the body of the HTTP request.
The CreatedAtRoute method returns a 201 response, which is the standard response for an HTTP POST method that creates a new resource on the server. CreatedAtRoute also adds a Location header to the response. The Location header specifies the URI of the newly created to-do item. See 10.2.2 201 Created.
Use Postman to send a Create request
- Set the HTTP method to
POST - Select the Body radio button
- Select the raw radio button
- Set the type to JSON
- In the key-value editor, enter a Todo item such as
{
"name":"walk dog",
"isComplete":true
}
-
Select Send
-
Select the Headers tab in the lower pane and copy the Location header:
You can use the Location header URI to access the resource you just created. Recall the GetById method created the "GetTodo" named route:
[HttpGet("{id}", Name = "GetTodo")]
public IActionResult GetById(long id)
Update
[!code-csharpMain]
Update is similar to Create, but uses HTTP PUT. The response is 204 (No Content). According to the HTTP spec, a PUT request requires the client to send the entire updated entity, not just the deltas. To support partial updates, use HTTP PATCH.
Delete
[!code-csharpMain]
The response is 204 (No Content).
