I was able to find the solution myself:
[OperationContract]
[WebInvoke(RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
public void DoSomething(Dictionary<string, object> values)
must be called in javascript like this:
var params = [{ "Key": "A", "Value": 5}, { "Key": "B", "Value": "Test}]
$.ajax({
type: "POST",
contentType: "application/json",
dataType: "json",
data: '{"values":' + JSON.stringify(params) + '}',
...
This can of course be simplified:
var parameters = [{ "A": 5}, { "B": "Test"}];
var dictionary = new Array();
for (var i in parameters) {
var key = Object.keys(args[i])[0];
var value = args[i][key];
dictionary.push({ "Key": key, "Value": value });
}
$.ajax({
type: "POST",
contentType: "application/json",
dataType: "json",
data: '{"values":' + JSON.stringify(dictionary) + '}',
...
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