JSONToVariant (Function)

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Checking NULL on a value

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JSONToVariant (Function)

In french: JSONVersVariant

Converts a string in JSON format into a Variant variable.

Versions 20 and later

This function is now available for iPhone/iPad applications.

This function is now available for the Windows Mobile applications.

New in version 20

This function is now available for iPhone/iPad applications.

This function is now available for the Windows Mobile applications.

This function is now available for iPhone/iPad applications.

This function is now available for the Windows Mobile applications.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Versions 22 and later

This function is now available for Android applications.

This function is now available in Android Widget mode.

This function is now available in browser code.

New in version 22

This function is now available for Android applications.

This function is now available in Android Widget mode.

This function is now available in browser code.

This function is now available for Android applications.

This function is now available in Android Widget mode.

This function is now available in browser code.

Example

See additional examples

sJZon is ANSI string = [
{
"glossary": {
"title": "example glossary",
"GlossDiv": {
"title": "S",
"GlossList": {
"GlossEntry": {
"ID": "SGML",
"SortAs": "SGML",
"GlossTerm": "Standard Generalized Markup Language",
"Acronym": "SGML",
"Abbrev": "ISO 8879:1986",
"GlossDef": {
"para": "A meta-markup language, used to create markup languages such as DocBook.",
"GlossSeeAlso": ["GML", "XML"]
},
"GlossSee": "markup"
}
}
}
}
}
]

let jz = JSONToVariant(sJZon)

Syntax

<Result> = JSONToVariant(<JSON data>)

<Result>: Variant

Name of Variant variable containing the conversion result.

<JSON data>: ANSI character string encoded in 7-bit ASCII + JSON or UTF-8 encoding

Character string containing the data in JSON format.

Remarks

Encoding

The encoding used corresponds to the JSON standard:

using an encoding in 7-bit ASCII, which means the first 128 characters, the non-accented characters,
using a JSON encoding of other characters: "\u" followed by the character code in hexadecimal on 4. Example: for "é" (ASCII code 233, hexadecimal code E9), the encoding corresponds to "\u00E9".

Content of variant

The content of variant depends on the JSON used. It can correspond to:

the Null value,
a simple type: integer, character string, boolean
a table.
a complex object (VariantMember type, corresponding to an array of members where each member is a variant).

Checking NULL on a value

The "NULL" value is often used in JSON.

To check the "NULL" value of a variant, you can:

use the ..Value property of variant. For example:

v is Variant = JSONToVariant("{""m"":null}")
IF v.m..Value = Null THEN Trace("NULL")
Versions 23 and later
test the NULL value directly (available from version 230042). For example:check the NULL value directly. For example:

v is Variant = JSONToVariant("{""m"":null}")
IF v.m = Null THEN Trace("NULL")

New in version 23
test the NULL value directly (available from version 230042). For example:check the NULL value directly. For example:

v is Variant = JSONToVariant("{""m"":null}")
IF v.m = Null THEN Trace("NULL")

test the NULL value directly (available from version 230042). For example:check the NULL value directly. For example:

v is Variant = JSONToVariant("{""m"":null}")
IF v.m = Null THEN Trace("NULL")

Component : wd250vm.dll

See also

Minimum version required

Version 19

This page is also available for…

Comments

Video Json

bom dia
https://youtu.be/WkltQUt_Bak
https://windevdesenvolvimento.blogspot.com/2019/07/dicas-2204-windev-webdev-mobile-json-6.html
// Youtube Amarildo Matos
s_json_dados is string=fLoadText(EDT_ARQUIVO_JSON)
//ESSA LINHA DIFERENTE
let variavel_json=JSONToVariant(s_json_dados)
//ESSA LINHA DIFERENTE
TableDeleteAll(TABLE_JSON)
FOR nNCONTADOR=1 TO variavel_json..Count
nNOCORRENCIA is int=TableAddLine(TABLE_JSON)
TABLE_JSON[nNOCORRENCIA].COL_SHORT_DESCRIPTION=variavel_json[nNCONTADOR].short_description
TABLE_JSON[nNOCORRENCIA].COL_PRICE=variavel_json[nNCONTADOR].price
TABLE_JSON[nNOCORRENCIA].COL_STOCK_QUANTITY=variavel_json[nNCONTADOR].stock_quantity
END

amarildo

18 Jul. 2019

Video JSONToVariant

https://youtu.be/ZC3G1PrDN9g

https://windevdesenvolvimento.blogspot.com/2019/05/dicas-2107-windev-webdev-mobile-json-4.html

// BTN_LER_SJON
TableDeleteAll(TABLE_CLIENTE)
vTeste is Variant
vTeste=JSONToVariant(EDT_retorno)
FOR EACH indice OF vTeste
TableAddLine(TABLE_CLIENTE,indice.clienteid,indice.nome)
END

amarildo

13 May 2019

Ler Json e Colocar Tabela

Aula 1053 - WinDev json 2/... - Ler Jason e Adicionar Tabela - JSONVersVariant

//Blog com Video e Exemplo
http://windevdesenvolvimento.blogspot.com.br/2017/02/aula-1053-windev-json-2-ler-jason-e.html

//Video Youtube
https://www.youtube.com/watch?v=fY9AtlEkY-8

//Nessa aula vou mostrar como ler dados Json e colocar Tabela

s_json_dados is string=[
{"status": true,"valores":
{
"USD": {"nome": "Dolar","valor": 2.333,"ultima_consulta": 1386349203,"fonte": "UOL Economia - http://economia.uol.com.br/cotacoes/"},
"EUR": {"nome": "Euro","valor": 3.195,"ultima_consulta": 1386349203,"fonte": "UOL Economia - http://economia.uol.com.br/cotacoes/"},
"BTC": {"nome": "Bitcoin","valor": 2620,"ultima_consulta": 1386352803,"fonte": "Mercado Bitcoin - http://www.mercadobitcoin.com.br/"
}
}
}
]
let jz=JSONToVariant(s_json_dados)
TableDeleteAll(TABLE_indices)
FOR EACH _m OF jz..Member
TableAddLine(TABLE_indices,_m..Name+TAB+" = "+_m..Value)
TableAddLine(TABLE_indices,"=========================")
mebros(_m)
END
INTERNAL PROCEDURE mebros(x)
FOR EACH _m2 OF x..Member
TableAddLine(TABLE_indices,_m2.nome,_m2.valor,_m2.fonte,_m2.ultima_consulta)
END
END

De matos

04 Feb. 2017

Last update: 10/31/2019

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