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

97

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

///<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.

Comments

Submit
0 Comments

More Questions

url()- full() laravelhow to print in c# c# how to sort a list
print in c#get mouse position unity c# initialize array
string to int c#Retrieve url path Generate Random String
string to date vbmodal bootstrap style abril modal boostrap
c# serialize jsonboostrap 4 modal small modal popup bootstrap
model in bootsrap 4bootstrap modal popup c# random string
c sharp split stringstring to json c# laravel get current url
how get url in laravelhow to generate random letters in C# string to date
laravel route redirectcheck if two date ranges overlap c# Console.WriteLine($Hello Ana.ToUpper($)!);
phone number regex in c#list min and Max value in c# check shell command success
attribute c# get method name reflectionc# how to get screen resolution in class how to make dissapear an object in unity
wpf label text in centerhahhaa i hack u difference between all logging framework .NET Core
new color unityc# count files in directory and subdirectories Hello World Dotnet
import tachyons in reactHow can I cast string to enum .net core add header to soap request
open html file in browser using c++git find commits by message c# generate random date
how to get angular on visual studio macdotnet core encryption and decryption asp.net list all files in folder
C
CSS
Objective-C
PHP
Java
C++
Javascript
Html
Python
SQL
Swift
Ruby
Go
R
TypeScript
Kotlin
Assembly
VBA
Scala
Rust
Elixir
Dart
Haskell
Perl
Fortran
Matlab
Scheme
Julia
Lua
Delphi
Pascal
Solidity
BASIC
ActionScript
Csharp