JsonElement.TryParseValue(Utf8JsonReader, Nullable<JsonElement>) Method

Definition

Namespace:

System.Text.Json

Assembly:

System.Text.Json.dll

Source:

JsonElement.Parse.cs

Attempts to parse one JSON value (including objects or arrays) from the provided reader.

public:
 static bool TryParseValue(System::Text::Json::Utf8JsonReader % reader, [Runtime::InteropServices::Out] Nullable<System::Text::Json::JsonElement> % element);

public static bool TryParseValue (ref System.Text.Json.Utf8JsonReader reader, out System.Text.Json.JsonElement? element);

static member TryParseValue : Utf8JsonReader * Nullable -> bool

Public Shared Function TryParseValue (ByRef reader As Utf8JsonReader, ByRef element As Nullable(Of JsonElement)) As Boolean

Parameters

reader

Utf8JsonReader

The reader to read.

element

Nullable<JsonElement>

Receives the parsed element.

Returns

Boolean

true if a value was read and parsed into a JsonElement; false if the reader ran out of data while parsing. All other situations result in an exception being thrown.

Exceptions

ArgumentException

reader is using unsupported options.

ArgumentException

The current reader token does not start or represent a value.

JsonException

A value could not be read from the reader.

Remarks

If the TokenType property of reader is PropertyName or None, the reader will be advanced by one call to Read() to determine the start of the value.

Upon completion of this method, reader is positioned at the final token in the JSON value. If an exception is thrown or false is returned, the reader is reset to the state it was in when the method was called.

This method makes a copy of the data the reader acted on, so there is no caller requirement to maintain data integrity beyond the return of this method.