Step 1:
Download json2.js from https://github.com/douglascrockford/JSON-js
Include in your <head>
<script type="text/javascript" src="scripts/json2.js"></script>
Step 2:
Assuming you are populating an array from a select list, create and populate an array
var Voltages = new Array();
// AddedVoltage is my select list
$("#AddedVoltage option").each(function () {
Voltages.push($(this).val());
});
Step 3:
Convert your array to a json string using json2.js
var jsonString = JSON.stringify(Voltages)
Step 4:
You can now pass the jsonString in your ajax request and recieve it as a string in your webservice.
Step 5:
Download jayrock json from http://code.google.com/p/jayrock/downloads/detail?name=jayrock-0.9.12915.zip&can=2&q= and add reference to your .net project.
More info here (http://msdn.microsoft.com/en-us/library/bb299886.aspx)
Step 6:
You can now convert the received json string in your web service to a list using
public List<String> ConvertToList(string jsonString) { List<string> SelectedVoltages = new List<string>(); using (JsonTextReader reader = new JsonTextReader(new StringReader(jsonString))) { while (reader.Read()) { if (reader.TokenClass == JsonTokenClass.String) { SelectedVoltages.Add(reader.Token.Text); } } } return SelectedVoltages; }