4.1 KiB
Implement the other CRUD operations
In the following sections, Create, Update, and Delete methods are added to the controller.
Create
Add the following Create method:
::: moniker range="<= aspnetcore-2.0" [!code-csharp]
The preceding code is an HTTP POST method, as 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. ::: moniker-end ::: moniker range=">= aspnetcore-2.1" [!code-csharp]
The preceding code is an HTTP POST method, as indicated by the [HttpPost] attribute. MVC gets the value of the to-do item from the body of the HTTP request. ::: moniker-end
The CreatedAtRoute method:
- Returns a 201 response. HTTP 201 is the standard response for an HTTP POST method that creates a new resource on the server.
- 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.
- Uses the "GetTodo" named route to create the URL. The "GetTodo" named route is defined in
GetById:
::: moniker range="<= aspnetcore-2.0" [!code-csharp] ::: moniker-end ::: moniker range=">= aspnetcore-2.1" [!code-csharp] ::: moniker-end
Use Postman to send a Create request
- Start the app.
- Open Postman.
- Update the port number in the localhost URL.
- Set the HTTP method to POST.
- Click the Body tab.
- Select the raw radio button.
- Set the type to JSON (application/json).
- Enter a request body with a to-do item resembling the following JSON:
{
"name":"walk dog",
"isComplete":true
}
- Click the Send button.
::: moniker range=">= aspnetcore-2.1"
[!TIP] If no response displays after clicking Send, disable the SSL certification verification option. This is found under File > Settings. Click the Send button again after disabling the setting. ::: moniker-end
Click the Headers tab in the Response pane and copy the Location header value:
The Location header URI can be used to access the new item.
Update
Add the following Update method:
::: moniker range="<= aspnetcore-2.0" [!code-csharp] ::: moniker-end ::: moniker range=">= aspnetcore-2.1" [!code-csharp] ::: moniker-end
Update is similar to Create, except it uses HTTP PUT. The response is 204 (No Content). According to the HTTP specification, a PUT request requires the client to send the entire updated entity, not just the deltas. To support partial updates, use HTTP PATCH.
Use Postman to update the to-do item's name to "walk cat":
Delete
Add the following Delete method:
The Delete response is 204 (No Content).
Use Postman to delete the to-do item:
