C#•3y ago

Parsing JSON

I'm struggling to parse and iterate over a JSON array of "key/object" elements. For instance, something in this format:

{
   "key1":{
      "param1":value,
      "param2":value
   },
   "key2":{
      "parm1":value,
      "param2":value
   }
}

{
   "key1":{
      "param1":value,
      "param2":value
   },
   "key2":{
      "parm1":value,
      "param2":value
   }
}

Using Netwonsoft for JSON parsing.

30 Replies

Unknown User•3y ago

Message Not Public

CyanoxOP•3y ago

There's no code to show I have iteration and such, I'm just struggling on the one line to parse that JSON string into an object Y'know, something along this line var obj = JsonConvert.DeserializeObject<>(input); But I can't figure out what to put as the type for that to parse

Thinker•3y ago

You need to create a class which models your JSON structure

CyanoxOP•3y ago

I didn't want to do that, ideally doing this without the need of that Figured it out anyways, Dictionary<string, dynamic> did the trick

Thinker•3y ago

Why?

CyanoxOP•3y ago

Because why have another class when it's unneeded

Thinker•3y ago

Do not use dynamic. Ever.

CyanoxOP•3y ago

One less thing to worry about Why not?

Thinker•3y ago

DO NOT USE DYNAMIC

CyanoxOP•3y ago

I've never used it before

Thinker•3y ago

C# is a statically typed language which means that every property of every class is available at compile-time. dynamic just skids around that and says fuck you to the compiler and allows you to access random things at runtime. This might seem great, but it comes at firstly a pretty major performance cost, and secondly the cost of not being able to navigate through your JSON structure safely.

Mayor McCheese•3y ago

dynamic solves some corner cases, but should be avoided

CyanoxOP•3y ago

Gotcha I guess I'll make a class then

Thinker•3y ago

You are much better off going through the trouble of just creating a class modelling your JSON structure. If you're using VS it even has a tool for this, and there are online tools for generating this.

Mayor McCheese•3y ago

if you don't make a class you're always going to be tunneling through to get config

CyanoxOP•3y ago

I know how, I was just trying to see if there was an alternative

Mayor McCheese•3y ago

environment variables but you'll not want to use those directly either

CyanoxOP•3y ago

Actually, even making a class, I'm not sure how I'd deserialize this Assume that within a key there's potential for there to be more than 1 param I was thinking it'd be like string, obj kinda thing

Mayor McCheese•3y ago

you're using newtonsoft?

CyanoxOP•3y ago

Yeah

Mayor McCheese•3y ago

var myconfig = JsonConvert.DeserializeObject<MyConfig>(someJsonStriing);

CyanoxOP•3y ago

I know that, the MyConfig part is the part I'm struggling on I sent a sample of what I'm trying to parse above

Angius•3y ago

Could be a dictionary of dictionaries, could be a class with dictionaries, could be a dictionary of classes, could be a class with classes Depends on if, and if so which, keys are always the same or dynamic

CyanoxOP•3y ago

Keys are dynamic Eh I might just make this an array and put the key in the obj It's kinda pointless doing what I'm doing for my purposes

Angius•3y ago

A dictionary of dictionaries, then Or of classes

CyanoxOP•3y ago

I'm just gonna make it an array

Angius•3y ago

It won't deserialize to an array, since you have the keys there At least I don't think it will

CyanoxOP•3y ago

I'm changing the json format

Angius•3y ago

Haven't used Newtonsoft in ages, so can't tell

Unknown User•3y ago

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Parsing JSON