What is the best way to incorporate the value of an ASP.NET variable into JavaScript?

I am working on an asp.net application where each bus is equipped with an android device that continuously sends its current location to a WCF REST service. The administrator needs to monitor the buses' locations, so I have created a dropdown list for selecting the bus number.

However, I am struggling with sending this bus number to the WCF service and displaying the current location on a map using a plotting algorithm in JavaScript. I am unsure of how to bridge the ASP.NET variable with JavaScript to achieve this. Any help would be greatly appreciated.

javascriptasp.net

Answer №1

Here is how you can retrieve the value of a dropdown list:

    var ddl= document.getElementById("<%= yourDDLId.ClientID %>")
    var select= ddl.options[ddl.selectedIndex].text;

Alternatively, you may also use this simplified version:

    var ddl= document.getElementById("yourDDLId")
    var select= ddl.options[ddl.selectedIndex].text;

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