이 이미지는 여기에 붙여 넣은 base64 문자열로 표시되어 있습니다. https://paste.ubuntu.com/23343680/ 이미지가 내부에 있습니다. 나는이 base64 문자열이 디코딩되지 않습니다.
Convert.FromBase64String
를 호출하고 그것은
{"Invalid length for a Base-64 char array or string."}
길이가 4로 나눌 때까지 =을 추가해야합니다. 유효한 base64 문자열 만 해당됩니다.
이 코드는 수행합니다
string s = "yourVeryLongBase64String";
if ((s.Length % 4) > 0)
{
int diff = 4 - (s.Length % 4);
s = s.PadRight(s.Length + diff, '=');
}
byte[] b = Convert.FromBase64String(s);
감사합니다. 이제이 한 가지 문제가 있습니다.이 https://paste.ubuntu.com/23343796/을 크롬 브라우저에 붙여 넣으면 이미지가 표시되고 https : // paste를 사용하면 .ubuntu.com/23343806/(내가 쓴) base64 변환 된 바이트 배열 이미지를 저장하고 비교, 이미지는 크롬에서 보이는 것과는 다릅니다. 무슨 일이 일어나는지 말해 줄 수 있어요? 감사. – user734028
나는 잘 모른다. 죄송합니다. –
안녕하세요, 귀하의 코드에서 약간의 버그를 발견, int int diff = s.Length % 4; shud 수 int diff = 4 - (s.Length % 4); – user734028
string str = "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=";
byte[] arr = Convert.FromBase64String(str);
추가 ==를 문자열의 끝에서. 그것은 효과가있을 것이다. 전달중인 입력이 유효하지 않습니다. base64 값
무엇이'Convert.FromBase64String'입니까? 말하자면, 당신은 어떻게 인자를 전달하는 문자열을 생성합니까 – Benj