Angular 2 Error Supplied parameters do not match any signature of call target

Question

I am trying to call post api on button click but I shows this error:

Supplied parameters do not match any signature of call target

Code:

changeStatus(id) {
    this.http.post('https://localhost:44300/api/apis/ChangeStatus/' + id)
        .subscribe(
            data => this._data = data.json(),
            err => this.logError(err)
        );
}

Answer 1

post method requires at least two parameters, first 'URL', and second 'Body' and in your code you are just passing URL not body.

Answer 2

http.post expects a body to be sent to the target host.

http.post(url, body, requestOptions)

So if you just want an empty body, because you have no additional data to send, you could do this:

changeStatus(id) {
    // mind the empty string here as a second parameter
    this.http.post('https://localhost:44300/api/apis/ChangeStatus/' + id, "") 
        .subscribe(
            data => this._data = data.json(),
            err => this.logError(err)
        );
}