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I'm currently writing a query that needs to send a string array to a webresource through json. This is the webresource i need to call:

[WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]

Result API.ImportByNumbers(string[] _Numbers) {}

Now i dont know how to form my json data. I've tried sending a normal javascript string array with all the numbers in it, but this gives a "Could not process child error".

When i try an array of objects 

Data = '{"ID":"1", "ID":"2"}'

the value inside webresource is always null...

Can anybody help?

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Data = '{"ID"="1", "ID"="2"}' isn't valid JSON. – Waleed Khan Sep 3 '12 at 14:16
try with '{"ID":"1","ID":"2"}' – Onheiron Sep 3 '12 at 14:17
sorry my bad, i was allready using ':' instead of '='. – user1643956 Sep 3 '12 at 14:44
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3 Answers

up vote 1 down vote accepted

Ok. I found the solution:

var idArray = ...        array of strings    
var Data = {"_Numbers": idArray }

then in in the query:

Data = JSON.stringify()
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up vote 0 down vote

Since your webmethod needs string[] _Numbers SO you have to pass such a json data which will send string of number .. Something like this.

var string={"1","2","3"};

var jsonData="{"+"_Numbers:"+"'"+string+"'"+"}"
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I have also tried that... And the value for _Numbers is always null then. – user1643956 Sep 3 '12 at 14:41
can you post your ajax code? – Ashirvad Sep 3 '12 at 14:42
$.ajax({ type: Type, url: Url, data: Data, contentType: ContentType, dataType: DataType, processdata: ProcessData, success: function (msg) { debugger; alert("import successfull") }, error: ServiceFailed }); – user1643956 Sep 3 '12 at 14:47
All the values should be ok cause im alrdy using them succesfully for a other method. – user1643956 Sep 3 '12 at 14:48
Type = "POST"; Url = "http://..."; ContentType = "application/json"; DataType = "json"; Data = '{"_Numbers" : "1", "_Numbers" : "2"}' varProcessData = true; – user1643956 Sep 3 '12 at 14:54
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up vote 0 down vote

Looks like the service is expecting to receive an array, not an object, so you should try not to complicate things and send something like this:

var json_str = "[1,2,3]"

But if you really need an JSON object, then you should try this

var json_str='{"_Numbers":[1,2,3]}'
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i have tried both your answers and they don't work: the first one gives an error back: expected value type and object so i guess it needs a json object the 2nd gives an error: expecting '/' found '_', could this be due to the name _Numbers beginning with _? – user1643956 Sep 4 '12 at 7:01
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