I'm using a web service with an ASP page. I'd like to keep most of what is going on here happening on the service, but I need to call one function from the codebehind. How do I do this and keep it asynch.?
How do you register a callback to codebehind that is called when the service call completes?
Thanks!!
EDIT: EXTRA INFO: I call an asmx web service using $.ajax from the jQuery library. I'd like to avoid too many changes, but again my end result must be calling a function from the service and upon completion calling a codebehind function, all as asynchronous as possible.
$.ajax({
type: "POST",
url: "WebService.asmx/InsertClient",
contentType: "application/json; charset=utf-8",
data: insertdata,
dataType: "json",
success: function (msg) {
pkey = msg.d;
inserted();
return false;
},
error: function (msg) {
alert(msg.status + msg);
return false;
}
});
All of that happens correctly and everything works, but I'm just having trouble trying to work in an asynchronous call to codebehind - because I need to update a dropdown to refresh its datasource - as here I have just added a new entry.
If you are calling the webservice from JS, you can hookup a OnSuccess event in JS and then do a __doPostback to your page from Javascript.
example:
`function testCall() { WebServiceProxy.GetDocuments(param01, this.onSucceed, this.onFailure); }
function onSucceed (result) { // if result is ok __doPostback(clientID, params); }
function onFailure (result) { }`
In the asp Page/UserControl you need to implement IPostBackEventHandler. For example that way:
public void RaisePostBackEvent( string eventArgument )
{
switch( eventArgument )
{
case "CallComplete":
OnWebServiceCompleted( new WebServiceCompletedEventArgs( value1 ) );
break;
default:
break;
}
}
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