json special characters encoding

What is a for JSON encoding ucode>?
If the source data contains control characters, the FOR JSON clause encodes them in the JSON output in \\u format, as shown in the following table. ... ... Here's an example of the FOR JSON output for source data that includes both special characters and control characters.
What is a for JSON output for source data?
Here's an example of the FOR JSON output for source data that includes both special characters and control characters. This article describes how the FOR JSON clause of a SQL Server SELECT statement escapes special characters and represents control characters in the JSON output.
How to escape a special character in a JSON string?
If you have to use special character in your JSON string, you can escape it using \\ character. \\b Backspace (ascii code 08) \\f Form feed (ascii code 0C) \ New line \\r Carriage return \ Tab \\" Double quote \\\\ Backslash character However, even if it is totally contrary to the spec, the author could use \\'.
What are control characters in JSON?
Control characters are used to control the flow of data within the JSON document. One of the main benefits of using special characters in JSON is that it allows developers to store data in a more organized and consistent manner.

Overview

By default, the serializer escapes all non-ASCII characters. That is, it replaces them with \\uxxxx where xxxx is the Unicode code of the character. For example, if the Summary property in the following JSON is set to Cyrillic жарко, the WeatherForecast object is serialized as shown in this example: learn.microsoft.com

Serialize language character sets

To serialize the character set(s) of one or more languages without escaping, specify Unicode range(s) when creating an instance of System.Text.Encodings.Web.JavaScriptEncoder, as shown in the following example: Imports System.Text.Encodings.Web Imports System.Text.Json Imports System.Text.Unicode var options1 = new JsonSerializerOptions { Encoder = JavaScriptEncoder.Create(UnicodeRanges.BasicLatin, UnicodeRanges.Cyrillic), WriteIndented = true }; jsonString = JsonSerializer.Serialize(weatherForecast, options1); This code doesn't escape Cyrillic or Greek characters. If the Summary property is set to Cyrillic жарко, the WeatherForecast object is serialized as shown in this example: By default, the encoder is initialized with the BasicLatin range. learn.microsoft.com

Serialize specific characters

An alternative is to specify individual characters that you want to allow through without being escaped. The following example serializes only the first two characters of жарко: Imports System.Text.Encodings.Web Imports System.Text.Json Imports System.Text.Unicode var encoderSettings = new TextEncoderSettings(); encoderSettings.AllowCharacters('\\u0

Block lists

The preceding sections show how to specify allow lists of code points or ranges that you don't want to be escaped. However, there are global and encoder-specific block lists that can override certain code points in your allow list. Code points in a block list are always escaped, even if they're included in your allow list. learn.microsoft.com

Serialize all characters

To minimize escaping you can use JavaScriptEncoder.UnsafeRelaxedJsonEscaping, as shown in the following example: Imports System.Text.Encodings.Web Imports System.Text.Json Imports System.Text.Unicode var options3 = new JsonSerializerOptions { Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping, WriteIndented = true }; jsonString = JsonSerializer.Serialize(weatherForecast, options3); Caution Compared to the default encoder, the UnsafeRelaxedJsonEscaping encoder is more permissive about allowing characters to pass through unescaped: •It doesn't escape HTML-sensitive characters such as <, >, &, and '. •It doesn't offer any additional defense-in-depth protections against XSS or information disclosure attacks, such as those which might result from the client and server disagreeing on the charset. Use the unsafe encoder only when it's known that the client will be interpreting the resulting payload as UTF-8 encoded JSON. For example, you can use it if the server is sending the response header Content-Type: application/json; charset=utf-8. Never allow the raw UnsafeRelaxedJsonEscaping output to be emitted into an HTML page or a learn.microsoft.com