JsonDocumentSelect

JsonDocumentSelect is a class library to extract key and values from JSON (System.Text.Json.JsonDocument) with single line expressions (JsonPath)

The JsonPath parser is based on the Newtonsoft.Json and JsonDocumentPath

But the JsonDocumentPath not update for a long time and not accept my pr for a long time, so I decide to create the JsonDocumentSelect library.

NuGet Package

How to use it

  string json = @"{
    ""persons"": [
      {
        ""name""  : ""John"",
        ""age"": ""26""
      },
      {
        ""name""  : ""Jane"",
        ""age"": ""2""
      }
    ]
  }";

var models = JsonDocument.Parse(json);

var results = models.SelectElements("$.persons[*].name").ToList();

The result

[ { "Element": "John", "Name": "name" }, { "Element": "Jane", "Name": "name" } ]

Implementation

Because JsonDocumentSelect is using the same Json.net strategic for parsing and evaluation the following is a list of pieces were already implemented:

Filters:

• ArrayIndexFilter
• ArrayMultipleIndexFilter
• ArraySliceFilter
• FieldFilter
• FieldMultipleFilter
• QueryFilter
• QueryScanFilter
• RootFilter
• ScanFilter
• ScanMultipleFilter

Unit Test:

• JPathParseTests
• QueryExpressionTests
• JPathExecuteTests