Json and exception System.ArgumentException: 'Escape sequence not recognized.. (48):

Question

Hello People, Good Night,

The code above generate the Exception System.ArgumentException: 'Escape sequence not recognized. (48):

Dim resposta As String ="{"SUCCESS":0,"IDERRO":1,"ERRO":"O CAMPO NOME \U00E9 OBRIGAT\U00F3RIO"}"

Dim obj As Object = New JavaScriptSerializer().Deserialize(Of Object)(resposta.ToString())

How i solve the problem ?

Thank you

César Oliveira

Answer 1

@César Oliveira - your JSON string, resposta has an escape sequence that VS does not recognize. The "\U" within the JSON string is not supported. You should change the \U to \U.

Answer 2

Not is possíble.
This json came of WebService
I can't change the json

How i solve the problema in vb.net ?

Thank you

Answer 3

Hi @César Oliveira ,

You could use Chrw() function to recognize escape sequence in visual basic, which is like:

"O CAMPO NOME \U00E9 OBRIGAT\U00F3RIO" -> "O CAMPO NOME" + ChrW(&HE9) + " OBRIGAT" + ChrW(&HF3) + "RIO"

Best Regards,
Dylan

Answer 4

No, i cant change the code json.
it is necessary manipulate the variable resposta to acept the Escape sequence not recognized

I tried other code but not work, it generate another exception. The code is:

Dim resposta As String ="{"SUCCESS":0,"IDERRO":1,"ERRO":"O CAMPO NOME \U00E9 OBRIGAT\U00F3RIO"}"
Dim stream = New MemoryStream(Encoding.UTF8.GetBytes(resposta.ToString()))
Dim obj As Object = New JavaScriptSerializer().Deserialize(Of MensagemErro)(stream.toString())

The exeption is System.ArgumentException: 'Invalid JSON primitive: System.IO.MemoryStream.'

Thank you

Answer 5

Thank you for all people,

i solve the problem

it is easy

i convent the variable restultado to Lowercase. it work now.

Thank you