C#•15mo ago

Working with jsonnode class

Working with JsonNode class. Is there any function or property to get the various key value pairs? Would jsonDocument be better? I have a string I got from an http request and I need to manipulate the data. One example of the json is below. all other entries are similar. Certain values omitted for security.

{
  "LicenseUsageList": [
    {
      "UserName": "doman\\username",
      "LicenseType": "license type",
      "AcquisitionTime": "2023-10-12T08:04:52.523",
      "SessionType": "UISERVER-FULL",
      "SessionId": "session id",
      "LicenseProperties": [
        {
          "Key": "DbServerPid",
          "Value": "64"
        },
        {
          "Key": "ProgramName",
          "Value": "program name"
        },
        {
          "Key": "DbExecutionContextId",
          "Value": "0"
        },
        {
          "Key": "Name",
          "Value": "app name"
        },
        {
          "Key": "LoginName",
          "Value": "user name"
        },
        {
          "Key": "LoginTime",
          "Value": "10/12/2023 08:04:52"
        },
        {
          "Key": "HostName",
          "Value": "server name"
        },
        {
          "Key": "HostPid",
          "Value": "hostPid"
        }
      ]
    },
  ]
}

{
  "LicenseUsageList": [
    {
      "UserName": "doman\\username",
      "LicenseType": "license type",
      "AcquisitionTime": "2023-10-12T08:04:52.523",
      "SessionType": "UISERVER-FULL",
      "SessionId": "session id",
      "LicenseProperties": [
        {
          "Key": "DbServerPid",
          "Value": "64"
        },
        {
          "Key": "ProgramName",
          "Value": "program name"
        },
        {
          "Key": "DbExecutionContextId",
          "Value": "0"
        },
        {
          "Key": "Name",
          "Value": "app name"
        },
        {
          "Key": "LoginName",
          "Value": "user name"
        },
        {
          "Key": "LoginTime",
          "Value": "10/12/2023 08:04:52"
        },
        {
          "Key": "HostName",
          "Value": "server name"
        },
        {
          "Key": "HostPid",
          "Value": "hostPid"
        }
      ]
    },
  ]
}

I'd like to access each node via the "UserName" property and find duplicate values

18 Replies

Azrael•15mo ago

https://learn.microsoft.com/en-us/answers/questions/1191021/c-json-system-text-json-how-to-extract-an-object-f

C# JSON System.Text.Json - How to extract an object from a dictiona...

Hello, I am trying to populate embeds with data taken from a JSON file, however I am not familiar with that format. The JSON file follows this format (it's a single array of objects which all contain the same fields): [{ "Id":…

reflectronic•15mo ago

foreach i am not really sure what you mean by "access each node via the "UserName" property," but JsonArray and JsonObject are both ICollections, and you can iterate/use LINQ/etc. on either of them to do whatever queries you want

mrdudebro1OP•15mo ago

ok. let me serialize my json string to json object basically i want to get the username to check for duplicate logins

reflectronic•15mo ago

duplicate UserNames inLicenseUsageList?

mrdudebro1OP•15mo ago

yes

reflectronic•15mo ago

then yeah you can just do something like

var groups = obj["LicenseUsageList"].AsArray().ToLookup(e => e["UserName"].GetValue<string>());
if (groups.Any(a => a.Count() != 1)) { ... }

var groups = obj["LicenseUsageList"].AsArray().ToLookup(e => e["UserName"].GetValue<string>());
if (groups.Any(a => a.Count() != 1)) { ... }

or whatever maybe something more elegant than that, but, it should demonstrate what you nee to do

mrdudebro1OP•15mo ago

cool thanks. let me dive in hey sorry man, this a niche little thing that i'm having a hard time googling, what is meant by the part that says obj["LicenseUsageList"] what kind of object is being returned by that line?

reflectronic•15mo ago

https://learn.microsoft.com/en-us/dotnet/api/system.text.json.nodes.jsonnode.item?view=net-7.0

JsonNode.Item[] Property (System.Text.Json.Nodes)

Gets or sets the element at the specified index.

reflectronic•15mo ago

it returns another JsonNode the one representing the value. so, in this case, it should actually be a JsonArray

mrdudebro1OP•15mo ago

ohhhh okay can it be a jsonnode object? i have it converted from a plain string to a JsonNode by using JsonObject.Parse(jsonString)

reflectronic•15mo ago

can what be a jsonnode

mrdudebro1OP•15mo ago

copy your code directly var groups = jsonNode["LicenseUsageList"].AsArray().ToLookup(e => e["UserName"].GetValue<string>());

reflectronic•15mo ago

obj is a JsonNode, yeah

mrdudebro1OP•15mo ago

whereis that ToLookup() function from? a parent class?

reflectronic•15mo ago

it's from LINQ using System.Linq;

mrdudebro1OP•15mo ago

oh theyre just like general functions that datastructures can use like arrays etc. i'll have to look into that more seems helpful for data manipulation i'm assuming groups.any() is also from linq

reflectronic•15mo ago

yes

mrdudebro1OP•15mo ago

for some reason the e parameter in that statement kept coming back null. idk if i did something wrong, but i have figured a way to push all the usernames into a list but it'd be nice to skip the moization step of making a list since i already have it in a jsonarray i just know how to use lists better than linq objects i'm gonna sort the list alphabetically to check for duplicates this feels crazy but it'll work lol can you conver a plain string into a JsonNode object? i'm getting issues after i converted from List<JsonNode> to List<String>. I can't convert back because it only stored the values for "UserName"

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