Ajax JSON data Asynchronous request method

In JQuery 1.2, you can load JSON data for other domains, such as "myurl?callback=?", by using a callback function in JSONP form. Will jQuery be replaced automatically? To the correct function name to execute the callback function. Note: The code after this line will execute before the callback function executes.

Instance

$.ajax ({
Type: "Get",
DataType: "JSON",
URL: "<%=basepath%>actionsmuser.do?method=getusermsgbyuserid",
Data: "Userid=" +userid,
Success:function (msg) {
var data = eval ("(" +msg.responsetext+ ")");
Alert ($ ("#userName"). Val ());
$ ("#userName"). Val (Data[0].username);

}
});

Detailed description
This function is shorthand for Ajax functions, equivalent to:

$.ajax ({
Url:url,
Data:data,
Success:callback,
Datatype:json
});

Data sent to the server can be appended to the URL as a query string. If the value of the data parameter is an object (map), it is converted to a string and URL-coded before being appended to the URL.

Getjson

$.getjson (url,function (data) {
if (data!=null && data!= "") {
$ ("#userIdInput"). Val (Data[0].userid);
$ ("#userNameInput"). Val (Data[0].username);
$ ("#menusIdInput"). Val (Data[0].menusid);
$ ("#depIdInput"). Val (data[0].depid);
$ ("#isValidInput"). Val (Data[0].isvalid);
$ ("#userIdInput"). attr ("Disabled", true);
}

});

Reference table

Grammar

Jquery.getjson (URL,data,success (DATA,STATUS,XHR))

Parameters	Description
Url	Necessary. Specify which URL to send the request to.
Data	Optional. Specify the data to be sent to the server along with the request.
Success (DATA,STATUS,XHR)	Optional. A function that is required to run when a request succeeds. Additional parameters: Response -Contains the result data from the request Status-Contains the state of the request xhr -Contains XMLHttpRequest objects