The output will be soap too from what I can see in the service definition.
I am assuming you want to call the function from another server using c# as of time of writing there is no indication on the used technology. You need to add wcf reference and call the method using the generated class.
To add a reference to a service in the current solution
In Solution Explorer, right-click the name of the project that you want to add the service to, and then click Add Service Reference.
The Add Service Reference dialog box appears.
Click Discover.
All services (both WCF Data Services and WCF services) in the current solution are added to the Services list.
In the Services list, expand the node for the service that you want to use and select an entity set.
In the Namespace box, enter the namespace that you want to use for the reference.
Click OK to add the reference to the project.
A service client (proxy) is generated, and metadata that describes the service is added to the app.config file.
MSDN How to: Add, Update, or Remove a WCF Data Service Reference
If you are posting from javascript, here is a vanilla js example.
var soap_post_body = ""+
'<?xml version="1.0" encoding="utf-8"?>' +
'<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"'+ 'xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">'+
' <soap12:Body>'+
' <EmployeesLoginMethod xmlns="http://tempuri.org/">'+
' <username>string</username>'+
' <password>string</password>'+
' <IpAddress>string</IpAddress>'+
' <deviceName>string</deviceName>'+
' </EmployeesLoginMethod>'+
' </soap12:Body>'+
'</soap12:Envelope>';
xhr = new XMLHttpRequest();
xhr.open('POST', 'http://workforce.wifisocial.in/WebServicesMethods/EmployeesWebService.asmx');
xhr.setRequestHeader('Content-Type', 'application/soap+xml; charset=utf-8');
xhr.onload = function() {
if (xhr.status === 200) {
console.log(xhr.responseText);
}
else {
console.log(xhr.status);
}
};
xhr.send(encodeURI(soap_post_body));