How do I create JSON in ExtJS for an AJAX call?
I want to create this parameter file so that I can send it to my web service.
var parms = {
"quiz_id":"120",
"owner_id":"1",
"solver_id":"1",
"answers":
[
{
"answer_text" : "YES",
"question_id" : "1"
},
{
"answer_text" : "NO",
"question_id" : "2"
},
{
"answer_text" : "YES",
"question_id" : "3"
},
{
"answer_text" : "YES",
"question_id" : "4"
},
{
"answer_text" : "YES",
"question_id" : "5"
}
]
};
I am stuck with the contents inside of the answers. I don't know how to create it dynamically.
for serializing Javascript objects to JSON strings either you can use
JSON.stringify(Object);
which is available in most of the latest browers, else you can use ExtJS inbuilt method
Ext.encode(Object);
and for deserializing JSON string you can use JSON.parse(JSONString) or Ext.decode(JSONString)
An easy way to do this is to create your data as a javascript object and then use a Json "stringifier" to turn it into a json string, which can then be passed to your server.
This same problem was answered previously at Serializing an object to JSON
If you use jquery (and I highly recommend it as a very useful tool for all serious javascript programmers), there is a nice plugin that I use for passing json back and forth in Ajax calls. See http://code.google.com/p/jquery-json/
创建一个包含数组和内部对象的对象，然后查看Ext.data.proxy.Server.encodeFilters()方法。