System.Text.Json Custom Deserialization for Dictionary<string, Dictionary<string, Dictionary&l-CodePudding

I need to have the System.Text.Json.JsonSerializer be able to deserialize this nested Dictionary type structure, but I'm getting the following error:

Unable to cast object of type 'System.Text.Json.JsonElement' to type 'System.String'.

I have the following JSON

{
  "ACL": {
    "granted": {
      "Business": {
        "Delete": [
          "Customer1",
          "Customer2"
        ]
      },
      "Account": {
        "Create": [
          "Customer1",
          "Customer3"
        ]
      }
    }
  }
}

Going into the following model

using System.Collections.Specialized;
public record AclRecord 
{
    public Dictionary<string, Dictionary<string, Dictionary<string, StringCollection>>> ACL { get; set; }
}

What would a JsonConverter to deserialize this type of triple nested Dictionary type structure look like?

CodePudding user response：

If you're willing to use List<string> instead of StringCollection for your deserialization target, this will work out of the box:

public record AclRecord
{
    public Dictionary<string, Dictionary<string, Dictionary<string, List<string>>>> ACL { get; set; }
}

var obj = JsonSerializer.Deserialize<AclRecord>(json);

If you MUST use StringCollection, you will need to write a custom converter.