Angular 5; asp.net web api http.delete doesn't work - asp.net-web-api

Question

I have asp.net web api server run in debug made and separate project uses Angular 5 - 5.2.11.
I try to delete data and I can't, but when I use postman it work.
import { Injectable } from '#angular/core';
import { HttpClient, HttpHeaders, HttpParams } from '#angular/common/http';
import { Observable } from 'rxjs/Observable';
import { map } from 'rxjs/operators';
#Injectable()
export class UserService { private getUserSucess: any;
private _headers = {
headers: new HttpHeaders().set('Content-Type', 'application/json')
};
private headers={
headers: new HttpHeaders({
'Content-Type': 'application/json'
});
}
constructor(private http: HttpClient) { }
deletUserHttp() {
return this.http.delete( 'http://localhost:52817/api/users/1' ).subscribe(deleteSucess.bind(this), deleteError.bind(this));
function deleteSucess(resp) {
debugger;
return resp;
}
function deleteError(resp) {
//resp = HttpErrorResponse {headers: HttpHeaders, status: 0, statusText: "Unknown Error", url: null, ok: false,
debugger;
return resp;
}
}
I also try with: this._headers and this.headars the result was the same:
HttpErrorResponse { headers: HttpHeaders, status: 0, statusText: "Unknown Error", url: null, ok: false,
405 Method Not Allowed:
Request URL: http://localhost:52817/api/users/1
Request Method: OPTIONS
Status Code: 405 Method Not Allowed
Remote Address: [::1]:52817
Referrer Policy: no-referrer-when-downgrade
Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS
Access-Control-Allow-Origin: *
Allow: GET,PUT,DELETE
Cache-Control: no-cache
Content-Length: 71
Content-Type: application/json; charset=utf-8
Date: Sat, 16 Jun 2018 05:43:07 GMT
Expires: -1
Pragma: no-cache
Server: Microsoft-IIS/10.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
X-SourceFiles: =?UTF-8?B?
QzpcVXNlcnNcQmV0bWlyYVxzb3VyY2VccmVwb3NcVXNlcnNcVXNlcnNcYXBpXHVzZXJzXDE=?=
Accept: /
Accept-Encoding: gzip, deflate, br
Accept-Language: pl-PL,pl;q=0.9,en-US;q=0.8,en;q=0.7,de;q=0.6
Access-Control-Request-Headers: content-type
Access-Control-Request-Method: DELETE
Connection: keep-alive
Host: localhost:52817
Origin: http://localhost:4200
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
web.config:
<system.webServer>
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Origin" value="*" />
<add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
</customHeaders>
</httpProtocol>
<rewrite>
<outboundRules>
<clear />
<rule name="AddCrossDomainHeader">
<match serverVariable="RESPONSE_Access_Control_Allow_Origin" pattern=".*" />
<conditions logicalGrouping="MatchAll" trackAllCaptures="true">
<add input="{HTTP_ORIGIN}" pattern="(http(s)?://((.+\.)?domain1\.com|(.+\.)?domain2\.com|(.+\.)?domain3\.com))" />
</conditions>
<!--<match serverVariable="RESPONSE_Access-Control-Allow-Methods" pattern="GET, POST, PUT, DELETE, OPTIONS" />
<conditions logicalGrouping="MatchAll" trackAllCaptures="true">
<add input="{HTTP_ORIGIN}" pattern="(http(s)?://((.+\.)?domain1\.com|(.+\.)?domain2\.com|(.+\.)?domain3\.com))" />
</conditions>-->
<action type="Rewrite" value="{C:0}" />
</rule>
</outboundRules>
</rewrite>
...
Please help me because I really don't know what is wrong.

Answer 1

Please refer to this document for enabling CORS for your asp.net webapi. Once CORS is enabled you should be able to delete using Angular app.