webservice that returns JSON data

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+1 Q:

webservice that returns JSON data

Hi frnds.... I have tiered of Googling but did't get any clue for myself. I want to make a web service which will have any method (let say-ProductInfo) & when i pass a productId in this method this will return the entire information of Product(like-ProdName,ProdPrice etc) in JSON format(File is downloaded with the Information of product).

I am very new ....so please guide me as a beginner for the above. for any kind of help Millions of Thanks.

+1 A:

For WCF (which is the recommended way of developing web service on .NET) you may take a look at this article for an example of developing a web service exposing JSON data.

For plain old ASMX services you could use the [ScriptService] attribute. Here's another article which illustrates the concept with an example.

Darin Dimitrov 2010-07-06 11:07:44

I want output something like in this manner-http://209.62.6.226/GracoRest/service.svc/Rest/WheretoBuy

2010-07-06 13:30:24

So the links I've posted might help you get started. Don't hesitate to ask if you encounter problems implementing some specific part.

Darin Dimitrov 2010-07-06 13:53:53

thanks Dimitrov...i will catch u tommarrow ....now i m at home.

2010-07-06 17:49:13

Hi darin....please help me for this.I have a method in my wcf service "ProductDetails" which takes 1 argument productId(string)...which returns product details to me.This methos is working fine when i do-http://192.xx.x.xx./Abc/Service.svc/ProductDetailsIt returns a file with contents in JSON format.now i want to call this method in Iphone....i m doing this-NSString *url=[NSString stringwithFormat:@"http://192.xx.x.xx./Abc/Service.svc/ProductDetails/%@","@P2"]Let the value of prodId is P2....This does't give me the right output.so please something for the above..where i m doing wrong.

2010-07-08 12:59:37

+1 A:

Base on your tag. I guess you use ASP.NET MVC. however, it you mean class ASP.NET then you might need to use WCF-REST to return JSON.

So: for you starting point

ASP.NET MVC - look at JsonResult here >>
ASP.NET - look at WCF-RESThere >>

Or if you are very new and don't know where to start, I'm recommended you to start at ASP.NET MVC 2

Jirapong 2010-07-06 11:15:43

Hi thanks again.. But i have problem.. i have gone through...ASP.NET - look at WCF-RESThere >> It is creating the service (localhost:2456/HTTPServiceJquery/service/…) but how i will access the methods of this service?? when i do this- (localhost:2456/HTTPServiceJquery/service/…) It results into method not allowed. so i want to use this methos of the service...plz tell me how i will do this. Sorry if it is a stupidity ...but i am anable to do this.I want something in this manner-http://209.62.6.226/GracoRest/service.svc/Rest/WheretoBuy

2010-07-06 13:31:53

No, You're not stupid. everyone passed this. You must create WCF inside you ASP.NET project. because JSON/Javascript request not allow you to call cross-domain.

Jirapong 2010-07-06 13:37:10

would you refer me some link(help) that will help me for doing this step by step.Thanks again.

2010-07-06 17:47:09

Unfortunally, There is no easy way - step by step that i can find. but first you need to have .svc in your project configure with web.config. http://www.itscodingtime.com/post/The-different-ways-to-host-a-WCF-Service-Application-in-a-Web-App.aspx might help. then you need to use Attribute WebInvoke which all good resource you can read at - http://www.west-wind.com/Weblog/ShowPosts.aspx?Category=WCFI encourage you to use WCF because later on it will be what all use can use. Silverlight, jQuery, WinPhone7 etc.

Jirapong 2010-07-07 02:57:21

Hi Jirapong...I have solved my problem discussed above.But now there is one other....I have a method in my wcf service "ProductDetails" which takes 1 argument productId(string)...which returns product details to me.This methos is working fine when i do-http://192.xxx.xxx.xx./Abc/Service.svc/ProductDetailsIt returns a file with contents in JSON format.now i want to call this method in Iphone....i m doing this-NSString *url=[NSString stringwithFormat:@"http://192.xxx.xxx.xx./Abc/Service.svc/ProductDetails/%@","@P2"]Let the value of prodId is P2....This does't give me the right output.

2010-07-08 12:57:33

so please suggest something for the above..where i m doing wrong.

2010-07-08 12:57:52

There are two things.1. You need to make Http Call instead of like that - http://www.mobileorchard.com/tutorial-json-over-http-on-the-iphone/2. You need a JSON Library - Go here and do Option 1 http://code.google.com/p/json-framework/wiki/InstallationInstructions

Jirapong 2010-07-09 03:35:06

Thanks exactly that i was looking for.

2010-07-09 05:20:00

ansaurus

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webservice that returns JSON data

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