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Posted 11 Oct 2013

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Jquery Cross-Domain ajax call using JSONP

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11 Oct 2013CPOL1 min read
Hi everyone. We all know the role of ajax and its implementation. We can use ajax in asp.net as well as in javascript/jquery. But there is a

This articles was originally at wiki.asp.net but has now been given a new home on CodeProject. Editing rights for this article has been set at Bronze or above, so please go in and edit and update this article to keep it fresh and relevant.

Hi everyone. We all know the role of ajax and its implementation. We can use ajax in asp.net as well as in javascript/jquery. But there is a limitation of same origin policy. i.e. we can only use ajax to post and get requests within our site. We can call webservices but that is from the code behind only. Even if we use any scripting language it restricts us calling a third party domain. Also over SSL javascript/jquery's ajax call gives up easily. But using jsonp with jquery's ajax api call we can target the ajax call outside the scope of our website.

$(document).ready(function() {
            var surl = "http://www.anotherdomain.com/webservice.asmx";
            $.ajax({
                type: 'GET',
                url: surl,
                crossDomain: true,
                contentType: "application/json; charset=utf-8",
                data: { UserID: 1234 },
                dataType: "jsonp",
                success: function(msg) {
                    $.each(msg, function(name, value) {
                        alert(value);
                    });
                },
                error: function(xhr, status, error) { alert('Servidor de error 404 !!'); },
                async: false,
                cache: false
            });
        });

Note:- This will only work with json data type, so while requesting a web service should return the data in Javascript Object notation format.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

ASP.NET Community
United States United States
The ASP.NET Wiki was started by Scott Hanselman in February of 2008. The idea is that folks spend a lot of time trolling the blogs, googlinglive-searching for answers to common "How To" questions. There's piles of fantastic community-created and MSFT-created content out there, but if it's not found by a search engine and the right combination of keywords, it's often lost.

The ASP.NET Wiki articles moved to CodeProject in October 2013 and will live on, loved, protected and updated by the community.
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Comments and Discussions

 
QuestionLive Website not working Pin
Bojjaiah21-Jun-16 2:32
MemberBojjaiah21-Jun-16 2:32 
Hi,

My website hosted on over https and api server is http. I am tried your solution but it didn't work. still same issue javascript - XMLHttpRequest cannot load in Live Website - Stack Overflow[^].
QuestionProblem in getting Json data Pin
Kumarbs18-Jul-14 2:09
professionalKumarbs18-Jul-14 2:09 

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