[C #] Decoding and encoding of UTF-8 encoding = quoted-printable

Decoding:

Shape

Begin: vCard

Version: 2.1n; charset = UTF-8; encoding = quoted-printable:; [= E5 = 86 = B7 = E6 = b1 = 9f] FN; charset = UTF-8; encoding = quoted-printable: [= E5 = 86 = B7 = E6 = b1 = 9f] Tel; cell: 13099999999x-irmc-luid: 00020000002 Cend: vCard

 

How to decode such a file [= E5 = 86 = B7 = E6 = b1 = 9f ]?

STR = Str. Replace ("=", "% ");

STR = system. Web. httputility. urldecode (STR, system. Text. encoding. utf8 );

 

In this way, you can understand it.

 

 

The following is not an explanation of the encoding method pasted.

Int J =-1;

For (INT I = 0; I <B. length; I ++) {If (B [I] = '%') {C + = "="; j = I ;} if (I-j <3 & I-j> 0 & J! =-1) {C + = B [I]. tostring (). toupper ();} else {If (B [I]! = '%') C + = B [I];}