问题
I have a json file that include emoji when I want to deserialize it , it could not deserialize emoji to string. my code is:
var mystring ={"message":"jjasdajdasjdj laslla aasdasd ssdfdsf!!! 🙌\u{1F3FD}", "updated_time":"2015-04-14T22:37:13+0000", "id":"145193995506_148030368559"}
FaceBookIdea ideaDetails = JsonConvert.DeserializeObject<FaceBookIdea>((mystring).ToString());
the error is :
{"Input string was not in a correct format."}
when I remove emoji it works well.
Thank a lot for your help
回答1:
Your problem is that this portion of your message string does not conform to the JSON standard:
"\u{1F3FD}"
According to the standard, \u four-hex-digits represents a unicode character literal given by the hex value of its code point. Your string \u{1F3FD} with its curly braces does not conform to this convention, and so Json.NET throws an exception upon trying to parse it. You will see a similar error if you upload your JSON to https://jsonformatter.curiousconcept.com/.
Thus it would seem, to fix your JSON to make it conform to the standard, you need to format your character like \uXXXX using the appropriate 4 hex digits. However, your character, U+1F3FD, is larger than 0xFFFF and does not exist on the Unicode Basic Multilingual Plane. It cannot be represented as a single 4-digit hex number. c# (and utf-16 in general) represents such Unicode characters as surrogate pairs -- pairs of two two-byte chars. You will need to do the same here. The UTF-16 (hex) representation of your character is
0xD83C 0xDFFD
Thus your JSON character needs to be:
\uD83C\uDFFD
And for your entire string:
{"message":"jjasdajdasjdj laslla aasdasd ssdfdsf!!! 🙌\uD83C\uDFFD", "updated_time":"2015-04-14T22:37:13+0000", "id":"145193995506_148030368559"}
来源：https://stackoverflow.com/questions/34139312/how-can-i-deserialize-emoji-in-json-in-c-sharp