Question

I am trying to persist geolocation data gotten by the google.maps.Geocoder().
From javascript I set the values into an (actually) hidden element in html (which is working fine):

document.getElementById("longitude").value = results[0].geometry.location.lng();
document.getElementById("latitude").value = results[0].geometry.location.lat();

From there I want to pass the values into the controller:

@Html.TextBoxFor(model => model.Longitude, new { id = "longitude", type = "number" })
@Html.TextBoxFor(model => model.Latitude, new { id = "latitude", type = "number"})

Depending on the decimal seperator I get either a validation error or the values for longitude and latitude are not set to the model. Both properties are type of long.

Why can’t Asp.Net parse the values automatically?
I am quite new to Asp.Net but I know I could else:

• write my own html-helper
• pass a view model into my controller or
• persisting the string values

Which way should I prefer?

Thanks, Rico

Answer 1

You’re getting errors because long stores large 64-bit integer values (it’s actually Int64 behind the scenes), not floating point values.

If you want your code to work with floating point values, you’ll need to use something like float or double.