Javascript code for reading JSON data cyclically

The JSON format string returned from the server end to the client:
Var str = '[{"uname": "Wang Qiang", "day": "2010/06/17" },{ "uname": "Wang haiyun", "day ": "2010/06/11"}] ';

We convert it to a JSON object: var jsonList = eval ("(" + str + ")"). At this time, if you use breakpoint tracking to view this jsonList object, you will actually find that, its length is 2, that is, jsonList. length = 2. Each of its items is a separate JSON object. See:


In this case, if we do not know the "uname" and "day" key values, we start to execute the loop operation on jsonList.
Copy codeThe Code is as follows:
For (var I = 0; I <jsonList. length; I ++ ){

For (var key in jsonList [I]) {
Alert ("key:" + key + ", value:" + jsonList [I] [key]);
}
}

In this way, we can easily obtain the key and value values we need.