使用c＃编码为CID时，从电子邮件中检索并显示嵌入式图像

Question

我需要物理路径中以下cid代码中的图片网址

<img id="Picture_x0020_6" src="cid:image001.png@0e4yt5586.A7D64B40" alt="cid:image009.png@34ty6CC2.1CD154B0" />

为

<img id="Picture_x0020_6" src="~/images/image009.png" alt="image009.png" />

Answer 1

您需要找到相应的隐藏附件，然后将其保存在磁盘上。 prog.cpp: In substitution of ‘template<class TT> static decltype ((lexicalCast<TT>(declval<From>()), std::true_type{})) LexicalCastable<From, To>::test(int) [with TT = std::__cxx11::basic_string<char>]’: prog.cpp:35:45: required from ‘const bool LexicalCastable<std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char> >::value’ prog.cpp:19:3: required by substitution of ‘template<class To, class From> typename std::enable_if<(((((! std::is_constructible<To, From>::value) && (! std::is_same<std::__cxx11::basic_string<char>, To>::value)) && (! std::is_same<std::__cxx11::basic_string<char>, From>::value)) && LexicalCastable<From, std::__cxx11::basic_string<char> >::value) && LexicalCastable<std::__cxx11::basic_string<char>, To>::value), To>::type lexicalCast(const From&) [with To = std::__cxx11::basic_string<char>; From = <missing>]’ prog.cpp:29:30: required by substitution of ‘template<class TT> static decltype ((lexicalCast<TT>(declval<From>()), std::true_type{})) LexicalCastable<From, To>::test(int) [with TT = std::__cxx11::basic_string<char>]’ prog.cpp:35:45: required from ‘const bool LexicalCastable<std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char> >::value’ prog.cpp:19:3: required by substitution of ‘template<class To, class From> typename std::enable_if<(((((! std::is_constructible<To, From>::value) && (! std::is_same<std::__cxx11::basic_string<char>, To>::value)) && (! std::is_same<std::__cxx11::basic_string<char>, From>::value)) && LexicalCastable<From, std::__cxx11::basic_string<char> >::value) && LexicalCastable<std::__cxx11::basic_string<char>, To>::value), To>::type lexicalCast(const From&) [with To = std::__cxx11::basic_string<char>; From = <missing>]’ prog.cpp:29:30: [ skipping 889 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ] prog.cpp:35:45: required from ‘const bool LexicalCastable<std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char> >::value’ prog.cpp:19:3: required by substitution of ‘template<class To, class From> typename std::enable_if<(((((! std::is_constructible<To, From>::value) && (! std::is_same<std::__cxx11::basic_string<char>, To>::value)) && (! std::is_same<std::__cxx11::basic_string<char>, From>::value)) && LexicalCastable<From, std::__cxx11::basic_string<char> >::value) && LexicalCastable<std::__cxx11::basic_string<char>, To>::value), To>::type lexicalCast(const From&) [with To = std::__cxx11::basic_string<char>; From = <missing>]’ prog.cpp:29:30: required by substitution of ‘template<class TT> static decltype ((lexicalCast<TT>(declval<From>()), std::true_type{})) LexicalCastable<From, To>::test(int) [with TT = std::__cxx11::basic_string<char>]’ prog.cpp:35:45: required from ‘const bool LexicalCastable<std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char> >::value’ prog.cpp:19:3: required by substitution of ‘template<class To, class From> typename std::enable_if<(((((! std::is_constructible<To, From>::value) && (! std::is_same<std::__cxx11::basic_string<char>, To>::value)) && (! std::is_same<std::__cxx11::basic_string<char>, From>::value)) && LexicalCastable<From, std::__cxx11::basic_string<char> >::value) && LexicalCastable<std::__cxx11::basic_string<char>, To>::value), To>::type lexicalCast(const From&) [with To = std::__cxx11::basic_string<char>; From = <missing>]’ prog.cpp:40:43: required from here prog.cpp:29:49: fatal error: template instantiation depth exceeds maximum of 900 (use -ftemplate-depth= to increase the maximum) -> decltype(lexicalCast<TT>(std::declval<From>()), std::true_type{}); ~~~~~~~~~~~~~~~~~~^~ 类的SaveAsFile方法将附件保存到指定的路径。然后，您可以将其上传到任何Web服务器，或者只是使其在全球范围内可用，然后更改邮件正文中的Attachment属性。