ASP.NET web API HTTP Delete 405 Method Not Allowed - asp.net-web-api

Question

I already worked with web API and had a lot of problems like posting multiple parameters. I upgraded to WebApi2 to use routing attributes and now have problems like:
"message":"The requested resource does not support http method 'DELETE'."
I spent all day searching Stack Overflow and the web to solve the problem:
Removed webdav
In http protocol allow all get,put,post,delete
Added the [HTTPDelete] attribute
Added name="ExtensionlessUrlHandler-Integrated-4.0" path="*."
verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS"
type="System.Web.Handlers.TransferRequestHandler"
preCondition="integratedMode,runtimeVersionv4.0"
Searched Google for the necessary help here
Can someone please guide me on this?

Answer 1

I had the same problem. Adding the below code to your web.config should fix the problem under the system.webserver section:
<system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules runAllManagedModulesForAllRequests="true">
<remove name="WebDAVModule"/>

Answer 2

I had the same problem, because my controller was like this:
[HttpDelete]
public HttpResponseMessage Delete(string Id)
{
....
}
And on the client I used the send the ID as request body:
var url = '/api/upload';
var data = JSON.stringify({ 'Id': id }); // <-- In the body
$.ajax({
url: url,
type: 'DELETE',
data: data, // <-- in the body
contentType: 'application/json'
})
When I changed the client to use it as URL parameter instead it worked:
var url = '/api/upload/' + id; // <- In the URL
$.ajax({
url: url,
type: 'DELETE',
contentType: 'application/json'
});

Answer 3

The JavaScript code for the DELETE verb must be like this:
$.ajax({
**url: "/api/SomeController/" + id,**
type: "DELETE",
dataType: "json",
success: function(data, statusText) {
alert(data);
},
error: function(request, textStatus, error) {
alert(error);
debugger;
}
});
Do NOT use something like this,
...
data: {id:id}
...
as when you are using the POST method.