Parse JSON C# Error

Question

I'm try to getting JSON data but getting Error.

Unexpected character encountered while parsing value: . Path '', line 0, position 0.

I'm using Net 4.5 and JSON.Net Framework Here my code

WebClient net = new WebClient();
string str = await net.DownloadStringTaskAsync(url);
JObject o = JObject.Parse(str); // ERROR Here

And my code JSON Data View on Webservice http://sv1.volcanosoft.com/test/index.php?area=ho-chi-minh this site format index.php UTF-8 and header of php file

header('Content-Type:application/json; charset=utf-8');
echo '{"item":';
echo json_encode($data);
echo '}';

I don't think `str`'s content is as you have posted. My guess you get an error or redirect page with Html content. — I4V, Jan 06 '13 at 10:33
Is this the JSON data in str when you debug it or before downloading the string? — roeland, Jan 06 '13 at 10:33
Your posted JSON string seems valid as http://jsonlint.com says — boindiil, Jan 06 '13 at 10:34
Could you just try this without downloading the string: JObject o = JObject.Parse("...the JSON data like posted here..."); — roeland, Jan 06 '13 at 10:54
same here, JSON data seems ok. I've just tested it with http://jsonlint.com/. But look at error message: `when parsing value: .` Notice that the value quoted in the error is empty, maybe that's the point? — quetzalcoatl, Jan 06 '13 at 10:55

score 2 · Accepted Answer · answered Jan 06 '13 at 16:06

The downloaded string starts with two byte order marks (U+FEFF), which JSON.NET parser (correctly) doesn't understand.

The reason why the downloaded string contains two BOMs is because the data your service is sending contains 3 of them. The first one is removed automatically by UTF-8 encoding, but the two other remain.

BOM can be useful with files, where you can't store the charset used. But you are sending the charset used in a header, so you don't need to send BOM at all. And sending three of them is certainly incorrect.

I believe this is caused by BOMs in your PHP files, so you should probably remove them from there.

thank you. It done :D . But how to convert `Tiêu đề Áo khoác nữ màu da bò` to Unicode ? — RaymondLe, Jan 06 '13 at 16:46

Parse JSON C# Error

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