Is it unusual for a web service call to have an "out" parameter?

Question

Is it unusual to have a "out" parameter to call a web service? If so, why?

I use the C # web service, and the webserive consumer will also use the C # application.

Answer 1

If you reference parameters at the C # level in the ASP.Net web service, I don't think this is unusual. Your parameters will simply become children of the response element. Here is a quick example of a web service with a single web method that has parameters:

[WebService(Namespace = "http://begen.name/xml/namespace/2009/10/samplewebservicev1")]
public class SampleWebServiceV1 : WebService
{
    [WebMethod]
    public void
    WebMethodWithOutParameters(out string OutParam1, out string OutParam2)
    {
        OutParam1 = "Hello";
        OutParam2 = "Web!";
    }
}

Using the above web method, a SOAP request is as follows:

POST /SampleWebServiceV1.asmx HTTP/1.1
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://begen.name/xml/namespace/2009/10/samplewebservicev1/WebMethodWithOutParameters"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <WebMethodWithOutParameters xmlns="http://begen.name/xml/namespace/2009/10/samplewebservicev1" />
  </soap:Body>
</soap:Envelope>

And the answer is as follows:

HTTP/1.1 200 OK
Content-Type: text/xml; charset=utf-8
Content-Length: length

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <WebMethodWithOutParametersResponse xmlns="http://begen.name/xml/namespace/2009/10/samplewebservicev1">
      <OutParam1>Hello</OutParam1>
      <OutParam2>Web!</OutParam2>
    </WebMethodWithOutParametersResponse>
  </soap:Body>
</soap:Envelope>

. , -, #.

Answer 2

, - () ().

"out" , ... . , , .

Answer 3

Yes, you want to link what you return to a single object (usually a response object)

See Wikipedia