![]() ![]() A String value can contain a collection of none or more UNICODE characters (except double-quotes, ‘\’ or control chars), enclosed by double-quotes.Values inside a JSON object can be of the following types: String, Number, Object, Array, True, False or Null.Arrays are stored within square brackets: ‘’.The String (attribute name) is separated from the value with a ‘:’.Between the brackets, it has a number of string value pairs An object in JSON starts and ends with ‘’ respectively.In fact, every popular programming language will commonly provide some support for dealing with JSON data. JavaScript:Īlthough the JSON syntax resembles JavaScript (it is based on JavaScript - no surprise), this data format can be used in any programming language. Additionally, the JSON data can be transformed into one line, removing unnecessary spaces and saving additional bandwidth. The standard permits the file to be formatted (also referred to as beautify), allowing better visualization of its contents. The JSON data structure is less verbose than XML and still simple, so it has been adopted as the first option for projects that require data transportation, since it tends to have better performance while consuming less network bandwidth. For example, if you set JsonSerializerOptions.DefaultIgnoreCondition to WhenWritingNull and call JsonSerializer with an overload that takes JsonSerializerOptions, null properties won't be ignored.JSON (JavaScript Object Notation) is an alternative to XML, which is also an open standard format that uses human-readable text to describe data objects consisting of attributes and values. Other features of the options instance are not used. However, if you use an overload that takes JsonSerializerOptions, the options instance is only used to get custom converters. You can use JsonSerializer to serialize and deserialize an instance of JsonNode. Gets the number of students from the Count property of JsonArray.Assigns a default grade of 70 for students who don't have a grade.Calculates an average grade for objects in a Students array that have a Grade property. ![]() Var options = new JsonSerializerOptions ") JsonNode forecastNode = JsonNode.Parse(jsonString)! Create a JsonNode DOM from a JSON string. Get a value, object, or array from a DOM.The following example shows how to use JsonNode and the other types in the namespace to: The JsonDocument DOM provides faster access to its data.The JsonNode DOM can be changed after it's created.For more information, see Use JsonNode later in this article.Ĭonsider the following factors when choosing between JsonDocument and JsonNode: The JSON elements that compose the payload can be accessed via the JsonNode, JsonObject, JsonArray, JsonValue, and JsonElement types. JsonNode and the classes that derive from it in the namespace provide the ability to create a mutable DOM. For more information, see Use JsonDocument later in this article. JsonDocument exposes a RootElement property. The JsonElement type provides array and object enumerators along with APIs to convert JSON text to common. ![]() The JSON elements that compose the payload can be accessed via the JsonElement type. JsonDocument provides the ability to build a read-only DOM by using Utf8JsonReader. ![]()
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