I am doing the following at the moment and it seems to work, not sure there is not a method I could use.
var
dataSource;
function
RequestStart(sender, args) {
dataSource = $find(
'<%= RadClientDataSource1.ClientID %>'
);
dataSource._transport.read.url = dataSource._transport.baseUrl +
"GetListProducts/3"
;
};
Thanks, Marty