Question 105062 in Azure Question posted in
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Azure Functions – array of objects in local.settings.json

I am trying to implement an array of JSON objects in my local.settings.json file for my Azure function. The default file looks like this:

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "Default",
    "AzureWebJobsDashboard": "Default",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
  }

I know that any values added to the values section can be extracted in my .cs file using Environment.GetVariable(). However I would like to add an array like this:

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "Default",
    "AzureWebJobsDashboard": "Default",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet",
  },
  "data": [
    {
      "attribute" : "details"
      "attribute2": "details"
    },
    {
      "attribute" : "details"
      "attribute2": "details"
    }
  ]
}

I don’t think it’s possible to add this data array to the values section, since it’s expected to be a dictionary. How can I access the data array in my .cs file? I would like it to be in this format, due to the ease of adding objects when needed and the code will handle the changes with a loop since it is an array.

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2

Answers


  1. 0

    Unfortunately, it can’t be done.
    Your best bet is to serialize the array as string and then to load it from config and deserialize it.

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  2. 0

    With Azure Functions (I’ve tested with Isolated SDK but should be also working for In-Process SDK) you can define an array of objects and read it through the settings API in the following way.

    "ParentClientIdLookups:0:Key": "key1",
"ParentClientIdLookups:0:Value": "a598b9a1-dcb9-4295-a480-1c17147c4b3b",
"ParentClientIdLookups:1:Key": "key2",
"ParentClientIdLookups:1:Value": "9446a26d-fc72-45bb-916d-c644dfc74f91",

    Read it upon startup:

    var listOfLookups = builder.Configuration.GetSection("ParentClientIdLookups")
                      .Get<ParentClientIdLookup[]>();

    ParentClientIdLookup definition:

    public class ParentClientIdLookup
{
    public string Key { get; set; }
    public string Value { get; set; }
}
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