javascript - Event on marker drag Google Maps API V3 - Stack Overflow

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I created and event listener to perform a function when the user drag a marker but it's not working, could anyone help me ?

This is the event listener

google.maps.event.addListener(marker, 'dragend', enviarParaASP(marker));

And the function:

function enviarParaASP(marcador) {
            coordenadaASalvar = { latitude: marcador.position.d, longitude: marcador.position.e };

            jQuery.ajax({
                url: 'GoogleMapsGeolocation.aspx/SalvaCoordenadas',
                type: "POST",
                data: JSON.stringify({'coord': coordenadaASalvar}),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (msg) { alert("OK "); },
                failure: function (msg) { alert("Sorry!!! "); }
            });

I created and event listener to perform a function when the user drag a marker but it's not working, could anyone help me ?

This is the event listener

google.maps.event.addListener(marker, 'dragend', enviarParaASP(marker));

And the function:

function enviarParaASP(marcador) {
            coordenadaASalvar = { latitude: marcador.position.d, longitude: marcador.position.e };

            jQuery.ajax({
                url: 'GoogleMapsGeolocation.aspx/SalvaCoordenadas',
                type: "POST",
                data: JSON.stringify({'coord': coordenadaASalvar}),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (msg) { alert("OK "); },
                failure: function (msg) { alert("Sorry!!! "); }
            });

• javascript
• google-maps
• events
• google-maps-api-3
• dom-events

Share Improve this question Follow edited Jul 6, 2019 at 8:25 Brian Tompsett - 汤莱恩 5,8937272 gold badges6161 silver badges133133 bronze badges asked Mar 5, 2014 at 0:59 LuccasMFLuccasMF 43355 silver badges1515 bronze badges

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2 Answers 2

Sorted by: Reset to default 6

Your syntax is incorrect:

google.maps.event.addListener(marker, 'dragend', enviarParaASP(marker));

will run your function and assign the return value as the listener function (not what you want, particularly since the function doesn't have a return value, so it will be null).

The line should be:

google.maps.event.addListener(marker, 'dragend', enviarParaASP);

And enviarParaASP should take a google.maps.MouseEvent as its argument.

Your callback should just be a reference to your function, not an invocation:

google.maps.event.addListener(marker, 'dragend', enviarParaASP);

By invoking the function, it's only going to "fire" when it appears in your code, which is when you're trying to set up the listener.

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