Breaking News: Grepper is joining You.com. Read the official announcement!

system.text.json ways to go about getting to the data how to get the data text.json you should use JsonDocument when

addubs answered on March 18, 2022 Popularity 3/10 Helpfulness 2/10

answer system.text.json ways to go about getting to the data how to get the data text.json you should use JsonDocument when

system.text.json ways to go about getting to the data how to get the data text.json you should use JsonDocument when

Comment

///<Summary>
/// You should use JsonDocument and its related types when:
///
/// The JSON would be too complex to represent in a POCO.
/// You need access to only a few specific parts of the JSON data.
/// You don’t know the format of the JSON or the JSON could have multiple formats.
///</Summary>


// There are two ways to go about getting to the data that interests you. The first, if you know what you’re looking for,
// is to access the element directly through the DOM. You could for example do the following to get a known property:

// {"Topic":"Json Serialization Part 1","Part":1,"Author":"Marc","Co-Author":"Helen","Keywords":["json","netcore","parsing"]}
var blogPost = JsonDocument.Parse(stringifiedJson);
var topic = blogPost.RootElement.GetProperty("Topic").GetString();

//That works great for random access to a property that you know how to find. But what if you’re looking for a property that could be anywhere in the document? Or you need to read a particular property from each object in a JSON array? That’s where EnumerateObject and EnumerateArray come in. They can be used together to walk through any JsonDocument:


// {"Topic":"Json Serialization Part 1","Part":1,"Author":"Marc","Co-Author":"Helen","Keywords":["json","netcore","parsing"]}
var blogPost = JsonDocument.Parse(stringifiedJson);
 
// Find all authors, returns enumerable with "Marc", "Helen"
var authors = blogPost.RootElement.EnumerateObject()
                   .Where(it => it.Name.Contains("Author") && it.Value.ValueKind == JsonValueKind.String);
 
// Find all keywords, returns enumerable with "json", "netcore", "parsing"
var keywords = blogPost.RootElement.EnumerateObject()
                  .Where(it => it.Value.ValueKind == JsonValueKind.Array && it.Name == "Keywords")
                  .SelectMany(it => it.Value.EnumerateArray().Select(that => that.GetString()));

// Serialization and deserialization are both expensive operations. The JsonDocument API is designed to keep allocations down a minimum, reducing the impact it has on your application.

Popularity 3/10 Helpfulness 2/10 Language csharp

Source: marcroussy.com

Tags: c# get go system.text.json when

Link to this answer
Share Copy Link

Contributed on Mar 18 2022

addubs

0 Answers Avg Quality 2/10

system.text.json ways to go about getting to the data how to get the data text.json you should use JsonDocument when

Contents

More Related Answers

system.text.json ways to go about getting to the data how to get the data text.json you should use JsonDocument when

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.