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I am in mobile app and I use multiple Ajax calls to receive data from web server like below
function get_json() { $(document).ready(function() { $.ajax({ url: 'http://www.xxxxxxxxxxxxx', data: { name: 'xxxxxx' }, dataType: 'jsonp', //jsonp: 'callback', //jsonpCallback: 'jsonpCallback', success: function(data) { $.each(data.posts, function(i, post) { $.mobile.notesdb.transaction(function(t) { t.executeSql('INSERT into bill (barcode, buildingcode, buildingaddress, flatname, flatdescription, entryseason, period, amount, pastpayments, todaypayments, paydate, receiptno) VALUES (?,?,?,?,?,?,?,?,?,?,?,?);', [post.Id, post.Code, post.Address, post.Name, post.Description, post.EntrySeason, post.Period, post.Revenue, post.PastPayments, post.todaypayments, post.paydate, post.receiptno], //$.mobile.changePage('#page3', 'slide', false, true), null); }); $('#mycontent').append(post.Name); }); } }); $.ajax({ xxxx }); $.ajax({ xxxx }); }); } How can I force the 2nd ajax call to begin after the end of the first... the 3rd after the end of the 2nd and so go on?
885
The jQuery library provides a way to make any callback function waiting for multiple Ajax calls. This method is based on an object called Deferred. A Deferred object can register callback functions based on whether the Deferrred object is resolved or rejected. Here is an example of the Deferred object.
To iterate through the response, there is a callback function attached to it. This callback function gets executed once both the Ajax requests are finished. In case where multiple Deferred objects are passed to $. when() , it takes the response returned by both calls, and constructs a new promise object.
for prevent multiple ajax request in whole site. For example: If use ajax request in other ajax page, Using ajax in php loop, etc, Give you multiple ajax request with one result. I have solution: Use window.
Place them inside of the success: of the one it relies on.
$.ajax({ url: 'http://www.xxxxxxxxxxxxx', data: {name: 'xxxxxx'}, dataType: 'jsonp', success: function(data){ // do stuff // call next ajax function $.ajax({ xxx }); } }); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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