Collect several JSON-related program code segments

A json data string, and then use the eval () function in JavaScript scripts.

A json data-type token string. Then, you can directly access the JSON object by using the eval () function in the JavaScript script. It is more convenient and flexible. Note that a pair of parentheses must be added at both ends of the returned string:

var json1 = web_TreeView_TreeDemo.GetJson().value;json1 = eval('(' + json1 + ')');  

function showJSON()      {          var user =               {           "username":"andy",          "age":20,          "info": { "tel": "123456", "cellphone": "98765"},          "address":                  [                   {"city":"beijing","postcode":"222333"},                         {"city":"newyork","postcode":"555666"}                   ]               }               alert(user.username);               alert(user.age);               alert(user.info.cellphone);               alert(user.address[0].city);               alert(user.address[0].postcode);             user.username = "Tom";               alert(user.username);          }    

Convert a string to a json object:

// Use the eval function to convert the string to the json object function myEval () {var str = '{"name": "viotlet", "occupation": "character "}'; var obj = eval ('+ str +'); alert (obj. toJSONString ());}

// Use json. function myeval () {var str = '{"name": "Violet", "occupation": "character"}'; var obj = str. parseJSON (); alert (obj. toJSONString ());}

Convert a json object to a string:

function showCar() {           var carr = new Car("Dodge", "Coronet R/T", 1968, "yellow");           alert(carr.toJSONString());       }             function Car(make, model, year, color)       {            this.make  =  make;            this.model  =  model;            this.year  =  year;            this.color  =  color;       }  

Function test () {var myJSONtext = {"bindings": [{"ircEvent": "PRIVMSG", "method": "newURI", "regex": "^ http: //. * "},{" ircEvent ":" PRIVMSG "," method ":" deleteURI "," regex ":" ^ delete. * "},{" ircEvent ":" PRIVMSG "," method ":" randomURI "," regex ":" ^ random. * "}]}; var myObject = eval (myJSONtext); alert (" Object length: "+ myObject. bindings. length); for (var I = 0; I
 
  
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