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How to deserialize a JSON string in D365fo

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Posted on by Zohan_93

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Hi,

I've consumed a json string from webapi, now i want to deserialize a json string in x++ to insert the values in custom table. I'm getting json string in this format

"[{\"id\":3,\"Name\":\"abc\",\"Reference\":\"T12345\"}]"

Anyone with verified solution kindly do suggest as I've tried some solutions but it doesn't fulfill my requirements. Please Note i've to achieve this via x++ not c#.

Regards,

Zohan

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Sergei Minozhenko 23,097 on at

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Hi,

You can use the contracts and FormJsonSerializer class

community.dynamics.com/.../how-to-deserialize-json-file-in-d365fo

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nmaenpaa 101,172 Moderator on at

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Since we don't know which solutions you tried, it might be that we suggest something that doesn't work for you. If you wish to avoid that, you can tell us which solutions you tried.

Normally you would develop a data contract in C# and use some existing library such as NewtonSoft.Json to handle it. Then build the whole thing to DLL and use it from your x++ code.

Here's one example: msdax.wordpress.com/.../

I don't know why you want to avoid using C# but if that's really a hard requirement for you, unfortunately I can't help you. But where does that requirement come from? I suggest to discuss with that person because I don't see any business reason to not use it.

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Zohan_93 199 on at

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Thankyou sergei, but what if my string contains multiple records , then should i use list instead of string in contract class ? if yes then it throws an exception on

contract = FormJsonSerializer::deserializeObject(classNum(WebApiContract),_jsonString);

"The type of object cannot be set"..

any suggestion ?

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nmaenpaa 101,172 Moderator on at

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Could you share the actual JSON string? There were no multiple records in the example that you shared in your first post. So we can't see what is the format of your actual JSON.

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Sergei Minozhenko 23,097 on at

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Hi Zohan_93,

Try to make a root contract that will contain a List of contracts for one record only and use it as a parameter for deserializeObject method. Check the example in my last comment in the thread mentioned above.

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Sergei Minozhenko 23,097 on at

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Hi Zohan_93,

Or you can try to deserialize it as collection:

List listOfcontract = FormJsonSerializer::deserializeCollection(classNum(List), json_string, types::Class, classStr(YourContract));

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Zohan_93 199 on at

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Here's is the string

"[{\"id\":3,\"tType\":\"payment\",\"referenceNo\":\"1533\",\"date\":\"2020-03-17T00:00:00\",\"amount\":100000.00,\"debit\":\"2205\",\"credit\":\"IN\",\"remarks\":\"TR No 855-1533/76/7-2\",\"status\":\"read count 21\"},{\"id\":4,\"Type\":\"payment\",\"referenceNo\":\"1579\",\"date\":\"2020-03-17T00:00:00\",\"amount\":80000.00,\"debit\":\"50001\",\"credit\":\"IA\"

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Zohan_93 199 on at

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Sergei,

here's the code ,

[

DataMember("Id"),

DataCollectionAttribute(Types::Class, classStr(WebApiContract))

]

public List parmId(List _id = id)

{

id = _id;

return id;

}

}

now when i try to achieve this by using //contract = FormJsonSerializer::deserializeObject(classNum(WebApiContract),_jsonString); it throws me an exception of The type of object cannot be set"....

any suggestion?

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Sergei Minozhenko 23,097 on at

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Hi Zohan_93,

Is WebApiContract your contract for one record? Could you, please, share it as well?

Also, try deserializeCollection method.

List listOfcontract = FormJsonSerializer::deserializeCollection(classNum(List), _jsonString, types::Class, classStr(WebApiContract));

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Martin Dráb 239,992 Most Valuable Professional on at

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Let's start by converting the escaped string to actual JSON and format it, so we can see the structure.

[{ "id":3, "tType":"payment", "referenceNo":"1533", "date":"2020-03-17T00:00:00", "amount":100000.00, "debit":"2205", "credit":"IN", "remarks":"TR No 855-1533/76/7-2", "status":"read count 21" }, { "id":4, "Type":"payment", "referenceNo":"1579", "date":"2020-03-17T00:00:00", "amount":80000.00, "debit":"50001", "credit":"IA"

It's now obvious that the string is incomplete.
Also, your contract class is for an object with a property "Id" containing the list of other objects, but there is nothing like that in your JSON. And then you don't use it for deserialization anyway; your code is for deserialization of a single WebApiContract object.

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