I'm sending some JSON in an HTTP POST request. Some of the text within the JSON object is supposed to have superscripts.
If I create my string in C# like this:
string s = "here is my superscript: \u00B9";
... it converts the \u00B9 to the actual superscript 1, which breaks my JSON. I want the \u00B9 to show up exactly as I write it in the the string, not as a superscript.
If I add an escape character, then it shows up like:
"here is my superscript: \\u00B9"
I don't want to use an escape character, but I also don't want it to be converted to the actual superscript. Is there a way to have C# not do Unicode conversion and leave it as literally: "\u00B9"?
If I understand your question correctly... add the at symbol (#) before the string to avoid the escape sequences being processed
string s = #"here is my superscript: \u00B9";
http://msdn.microsoft.com/en-us/library/362314fe(v=vs.80).aspx
I like #NinjaNye's answer, but the other approach is to use a double-backslash to make it literal. Thus string s = "here is my superscript: \\u00B9"
is recommended you encode your string before send to server. You can encode using base64 or URLEncode in client and decode in server side.
Related
I am writing an Android app in Unity using C#. The app will send SMS text messages that include a mixture of text and emojis.
My initial thought is to send the Unicode values of the respective emojis inline with any plain text. I have searched StackOverflow and I haven't found a concise example that solves this problem.
Here is code I have tried:
string mobile_num = "+18007671111; //Placeholder
string text = "Test: \\uFFFd\\uFFFd"; //(smile emoji Unicode value)
char[] chars = text.ToCharArray();
byte[] bytes = Encoding.UTF8.GetBytes(chars);
string message = HttpUtility.UrlEncode(bytes);
string sms = string.Format("sms:{0}?body={1}", mobile_num, message);
Application.OpenURL(sms);
I need to know:
1. Is this the correct approach?
a. if not, please help me correctly encode text + emoji data
b. What is the step required to covert so that the final message can be sent via SMS?
So after much searching, I found the simplest way in C# is to use:
\U########
Where:
\ is an escape character
U is a constant to define a Unicode sequence follows
## is the hex value of the emoticon encoded in exactly 8 characters left filled with zeros if necessary.
For example:
string u = "Smile: \U0001F601";
Will send:
Smile: 😁
Thank you Jeppe Stig Nielsen for your insight. For the full discussion follow this link:
How to convert numbers between hexadecimal and decimal
so first off, i know next to nothing about encoding, so thats probably the problem.
What I'm trying to do is Decode and Encode a String with Json.Decode and Json.Encode. So in the end, there should be the same string as before.
So a part of my target string has the following values in it :
"\":\"\u6b22\u8fce\u6765\u5230\" etc you get the idea. So now i convert the String like this:
DynamicJsonObject jsonObject = Json.Decode(Raw);
String newRaw = Json.Encode(jsonObject);
Now newRaw should be the same as Raw, am i right? Well the characters i mentioned look like this in newRaw:
欢迎来到《奇异人生：暴风前夕》。要及时获得最新
How can i fix that? I know that Raw has UTF8 encoding, but converting newRaw to UTF8 did not help! Thanks in advance.
"\u6b22" is a string constant that contains a single character: the unicode codepoint 6b22, a simplified Chinese character. This isn't a question of Json, but a question of c# string escape sequences.
I have a text such as "abc\u001357". It's a parameter in json object which I send from client to server via http.
How can I convert that text to a string like "abc%1357". I tried with Regex to replace characters. But it doesn't work
Thanks for advance
Try this code
var str = Uri.EscapeUriString("abc\u001357");
When I use json_encode function in PHP to encode an Object in json format, it will change urls in output to an string with escape characters like http:\/\/example.com\/apps\/images\/image01.jpg however C# return a url as is i.e. http://example.com/apps/images/image01.jpg and will not add any escape characters. Since I'm going to implement a web-service just same as my old PHP web service, I want to know how can I encode a url string in C# to be the same as PHP string.
You don't need to do anything. If you write your string i.e. to file (or console) from PHP and from C# you will get the same results without changing anything.
If you really want to replace / by \/ use String.Replace() method:
string likePhp = strCSharp.Replace("/", #"\/");
You shouldn't need escaped slashes, so tell PHP not to escape them with JSON_UNESCAPED_SLASHES. Why try and hack the C# JSON to escape the slashes when it's not needed.:
echo json_encode('http://example.com/apps/images/image01.jpg', JSON_UNESCAPED_SLASHES);
Yields:
http://example.com/apps/images/image01.jpg
In my ASP.Net application working process, I need to do some work with string, which equals something like
=?utf-8?B?SWhyZSBCZXN0ZWxsdW5nIC0gVmVyc2FuZGJlc3TDpHRpZ3VuZyAtIDExMDU4OTEyNDY=?=
How can I decode it to normal human language?
Thanks in advance!
Update:
Convert.FromBase64String() does not work for string, which equals
=?UTF-8?Q?Bestellbest=C3=A4tigung?=
I get The format of s is invalid. s contains a non-base-64 character, more than two padding characters, or a non-white space-character among the padding characters. exception.
Update:
Solution Here
Alternative solution
Update:
What kind of string encoding is that: Nweiß ???
It's actually a base-64 string:
string zz = "SWhyZSBCZXN0ZWxsdW5nIC0gVmVyc2FuZGJlc3TDpHRpZ3VuZyAtIDExMDU4OTEyNDY=";
byte[] dd = Convert.FromBase64String(zz);
// Returns Ihre Bestellung - Versandbestätigung - 1105891246
string yy = System.Text.Encoding.UTF8.GetString(dd);
I've written a library that will decode these sorts of strings. You can find it at http://github.com/jstedfast/MimeKit
Specifically, take a look at MimeKit.Utils.Rfc2047.DecodeText()
This seems to be MIME Header Encoding. The Q in your second example indicates that it is Quoted Printable.
This question seems to cover the variants fairly well. In a quick search I didn't find any .NET libraries to decode this automatically, but it shouldn't be hard to do manually if you need to.
That's not UTF8. Thats a Base64 encoded string.
the UTF-8 only indicates that the target string is in UTF8 format.
After decoding the Base64 string:
SWhyZSBCZXN0ZWxsdW5nIC0gVmVyc2FuZGJlc3TDpHRpZ3VuZyAtIDExMDU4OTEyNDY=
You'll get the following result:
Ihre Bestellung - Versandbestätigung - 1105891246
See Base64 online decode/encode
Looks like a base64 string.
Try Convert.FromBase64String
http://msdn.microsoft.com/en-us/library/system.convert.frombase64string.aspx
This is an encoded word, which is used in email headers when there is non-ASCII content. Encoded words are defined in RFC 2047:
https://www.rfc-editor.org/rfc/rfc2047#section-2
The BNF for an encoded word is:
encoded-word = "=?" charset "?" encoding "?" encoded-text "?="
So the correct way to interpret this is:
The data is the stuff between the 3rd and 4th question marks
It has been Base64 encoded (the 'B' stands for Base64; if it were a
'Q' then it would be quoted-printable).
Once you decode the
data, it will be in the UTF-8 character set.
The result, as #Shai correctly pointed out, is:
Ihre Bestellung - Versandbestätigung - 1105891246
This is German. The umlaut is obviously the reason for the UTF-8 and thus the need for an encoded word. The translation is:
Your order - Delivery confirmation - 1105891246
Apparently it's a tracking number for an order.
All modern email clients (and Outlook) transparently support encoded words.
This is a bit of guesswork, but let's try
remove =? from start and ?= from end
keep the start up to the next ? as the character set
Remove the B? - don't know, what it is
Convert the rest to a byte[] via System.Convert.FromBase64String()
Convert this to the final String via Encoding.GetSTring() using the character set remembered in the second step