Call web service Asynchronous

Question

User-275454158 posted

Hi,

I'm having my web service inside my asp.net application root directory. I want to call a web service method from my asp.net application on button click.  I don't want any output from this method. I just want to invoke the method. The method is going to call another web service. The process will take long time.
In this case i'm calling the web service from my application, here my application is waiting for the response from the web service. I don't want to wait for the response from the web service. How can i achieve this. Kindly guide me how can i proceed further. Thanks.

Answer 1

User-484054684 posted

Option 1: If you are using normal asmx webservices, then, just decorate your webMethod this way: [ SoapDocumentMethod(OneWay=true) ]

Reference: http://msdn.microsoft.com/en-us/library/system.web.services.protocols.soapdocumentmethodattribute.oneway.aspx

<%@ WebService Language="C#" Class="Stats" %>

 using System.Web.Services;
 using System.Web.Services.Protocols;

 public class Stats: WebService {

      [ SoapDocumentMethod(OneWay=true) ] 
      [ WebMethod(Description="Starts nightly statistics batch process.") ]
      public void StartStatsCrunch() {
         // Begin nightly statistics crunching process.
         // A one-way method cannot have return values.
      }

 }

Option 2: However, you may also like to use BeginXYZ and EndXYZ methods but that uses additional memory that is not used if you don't want to process return type.
Reference: http://stackoverflow.com/a/5037048
If you want to know in detail on how to use BeginXYZ and EndXYZ methods: http://msdn.microsoft.com/en-us/library/aa480516.aspx

You may also have a look at C# 4.5 feature, for other ways: http://msdn.microsoft.com/en-us/library/vstudio/hh156513.aspx

Please mark this as answer if this answers your question.

Answer 2

User-488622176 posted

Alternative:

• use WCF (forget about ASMX)
• Define a one-way service operation : http://msdn.microsoft.com/en-us/library/system.servicemodel.operationcontractattribute.isoneway(v=vs.110).aspx

This will make the call without waiting for the result.