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ParseJSON function

  • Grein

Applies to: Canvas apps Model-driven apps Power Pages Power Platform CLI

Interprets a JSON string and returns an untyped object.

Description

The ParseJSON function will parse a valid JSON string and return an untyped object representing the JSON structure.

The ParseJSON function may return errors if the text isn't valid JSON according to the JavaScript Object Notation (JSON) format described in ECMA-404 and IETF RFC 8259.

Syntax

ParseJSON( JSONString )

  • JSONString – Required. The JSON structure represented as text.

Converting Untyped object data type

ParseJSON returns an untyped object which requires explicit conversion of field values in supported data types. The following table lists the data types in Power Apps and a corresponding JSON data type and how to convert it.

Data type JSON examples Description Example conversion
Boolean { "bool": true } Boolean is an explicit type in JSON and can be directly converted. Boolean( ParseJSON("{ ""bool"": true }").bool )
Color { "color": "#102030" }
{ "r": 255, "g": 128, "b": 0, "a": 0.5 }		 There's no color type in JSON. Color values can be created from RGBA integers or hexadecimal strings. ColorValue( ParseJSON( "{ ""color"": ""#102030"" }" ).color )
With( { uo: ParseJSON( "{ ""r"": 255, ""g"": 128, ""b"": 0, ""a"": 0.5 }" ) }, RGBA( Value( uo.r ), Value( uo.g ), Value( uo.b ), Value( uo.a ) ) )
Currency, Number { "numbervalue": 123.5 } Numbers are represented directly in JSON with a period ( . ) as the decimal separator. Value( ParseJSON("{ ""numbervalue"": 123.5 }").numbervalue )
Date, DateTime, Time { "start": "2022-05-10" }
{ "start": "23:12:49.000" }		 JSON doesn't have a date or time type so can only represent dates and times as strings. An untyped object can be directly converted from a string in ISO 8601 format to a date, time or datetime. For other formats, first convert the JSON field to text using the Text() function and then use the DateValue(), TimeValue() or DateTimeValue() function that by default will use the language of the current user's settings. DateValue( ParseJSON("{ ""appointment"": ""2022-05-10"" }").appointment )
DateValue( Text( ParseJSON("{ ""appointment"": ""May 5, 2022"" }").appointment ) )
GUID { "id": "123e4567-e89b-12d3-a456-426655440000" } JSON doesn't have a data type for GUIds so they can only be represented as strings. GUID( ParseJSON("{ ""id"": ""123e4567-e89b-12d3-a456-426655440000"" }").id )
HyperLink, Image, Media { "URI": "https://northwindtraders.com/logo.jpg" } These data types are text data types, and can be converted to text and then used in Power Apps. Text( ParseJSON("{ ""URI"": ""https://northwindtraders.com/logo.jpg"" }").URI )
Choice { "status": 1 }
{ "status": "Closed" }		 Choices are presented as localized strings, backed by a number. The JSON() function serializes a choice to its backing number. There's no direct conversion from number or string to a choice, but the Switch() or If() functions can be used on the text or number value. Switch( Value( ParseJSON( "{ ""status"": 1 }" ).status ), 0, Status.Open, 1, Status.Closed )
Record { "field": "value" } There's no direct conversion from a JSON object to a record structure, but individual fields can be retrieved from the untyped object to form a record. { field: Text( ParseJSON( "{ ""field"": ""value"" }" ).field ) }
Record Reference n/a Record references are unique to datasources and can't be serialized or unserialized. Field values that represent unique keys could be used in JSON to identify records that can then be looked up. n/a
Table [ { "id": 1, "name": "one" }, { "id": 2, "name": "two" } ]
[1, 2, 3]		 JSON can contain arrays, which can be converted into tables. These values can be arrays of records, or arrays of values that are effectively single column tables. ParseJSON() arrays can only be converted into a single column table of untyped objects, and can be used as such or converted to typed tables of records using ForAll(). ForAll( Table( ParseJSON( "[ { ""id"": 1, ""name"": ""one"" }, { ""id"": 2, ""name"": ""two"" } ]" ) ), { id: Value(ThisRecord.Value.id), name: Text(ThisRecord.Value.name) } )
Text { "stringField": "this is text" } Text is an explicit type in JSON and can be directly converted. Text( ParseJSON( "{ ""stringField"": ""this is text"" }").stringField )
Two options { "available": true }
{ "available": "Yes" }		 Two options are presented as localized strings, backed by a boolean. The JSON() function serializes a two options to its boolean value. There's no direct conversion from boolean, number or string to a two options, but the Switch() or If() functions can be used on the text, number or boolean value. Switch( Boolean( ParseJSON( "{ ""available"": true }" ).available ), false, Availability.No, true, Availability.Yes )

Examples

Accessing field values

Given the following JSON string in a variable named JsonString

{ "parent": { "child": "text value" }, "number": 567 }
  1. The following formula returns the text text value: 
    Text( ParseJSON( JsonString ).parent.child )
  2. The following formula returns the number 567: 
    Value( ParseJSON( JsonString ).number )

In case a field name consists of an invalid identifier name, you can put the field names in single quotes. Given the following JSON string in a variable named JsonString

{ "0": { "child-field": "text value" } }
  1. The following formula returns the text text value: 
    Text( ParseJSON( JsonString ).'0'.'child-field' )

Blanks

Given the following JSON string in a variable named JsonString

{ "text": "text value" , "number": 567, "empty": null }
  1. Attempting to access non-existing fields returns Blank(). The following formula returns true: 
    IsBlank( Text( ParseJSON( JsonString ).parent.child ) )
  2. JSON null values are considered Blank(). The following formula returns true: 
    IsBlank( Text( ParseJSON( JsonString ).empty ) )

Simple Arrays

Given the following JSON string in a variable named JsonString

{ "array": [1, 2, 3] }
  1. Accessing the second number in the array field's single-column table of untyped object and converting to a number using Value() returns 2: 
    Value( Index( ParseJSON( JsonString ).array, 2 ) )
  2. Converting the single-column table of untyped object in the array field, to a single column table of numbers { Value: 1 }, { Value: 2 }, { Value: 3 }: 
    ForAll( ParseJSON( JsonString ).array, Value( ThisRecord ) )

Arrays of Records

Given the following JSON string in a variable named JsonString

{ "array": [
    { "id": 1, "name": "One"},
    { "id": 2, "name": "Two"}
    ] }

  1. Converting to a typed table of records directly with ForAll() can be done by using ThisRecord.[fieldname] to access untyped object fields and convert them to known types:

    ForAll( ParseJSON( JsonString ).array, { id: Value(ThisRecord.id), name: Text(ThisRecord.name) })

Array to Table

  1. Converting untyped object to a table by using the Table() function results in a single-column table of untyped objects. The object needs to then be accessed using Value (single) column and be converted to types as explained previously.

Given the following JSON string in a variable named JsonString

{ "array": [1, 2, 3] }

Table() returns a single-column table of untyped objects with a single-column Value for number in the array...

 Set(untypedTable, Table( ParseJSON( JsonString ).array );
 
 Value( Index(untypedTable, 1).Value.Value )
 ```

Given the following JSON string in a variable named `JsonString`
```JSON
{ "array": [
 { "id": 1, "name": "One"},
 { "id": 2, "name": "Two"}
 ] }

Table() returns a single-column table of untyped objects that represents each json object in the array.

  Set(untypedTable, Table( ParseJSON( JsonString ).array );
  
  Text( Index(untypedTable, 1).Value.name )