如何在MFC中验证电子邮件ID [英] how to do the validation of email id in MFC

问题描述

hi ,,,
我正在验证电子邮件ID，我收到的错误很少，请告诉我哪里出了错

,,
im validating the email id im getting few errors ,,pls say where im going wrong

BOOL CMailDlg::Validate()  
 {  
 CString m_sFrom;
 CString strRegex;
 System::String strRegex = "^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}" + "\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\" + ".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$";  
 System::Text::RegularExpressions::Regex ^_Regex = gcnew System::Text::RegularExpressions::Regex(strRegex);  
 if (_Regex->IsMatch(m_sFrom))  
 return (true);  
 else 
 return (false);  
 }

错误

errors

error C2653: ''System'' : is not a class or namespace name<br />
error C2065: ''String'' : undeclared identifier<br />
  missing '';'' before identifier ''strRegex''<br />
 error C2110: cannot add two pointers<br />
 error C2653: ''System'' : is not a class or namespace name<br />
 error C2065: ''Regex'' : undeclared identifier<br />
 error C2065: ''_Regex'' : undeclared identifier<br />
 error C2065: ''gcnew'' : undeclared identifier<br />
 error C2653: ''System'' : is not a class or namespace name<br />
 error C2106: ''='' : left operand must be l-value<br />
 error C2146: syntax error : missing '';'' before identifier ''Regex''<br />
error C2227: left of ''->IsMatch'' must point to class/struct/union

谢谢

推荐答案

; System :: Text :: RegularExpressions :: Regex ^ _Regex = gcnew System :: Text :: RegularExpressions :: Regex(strRegex); 如果(_Regex-& gt; IsMatch(m_sFrom)) return(true); 别的 返回(false); }

"; System::Text::RegularExpressions::Regex ^_Regex = gcnew System::Text::RegularExpressions::Regex(strRegex); if (_Regex->IsMatch(m_sFrom)) return (true); else return (false); }

错误

errors

error C2653: ''System'' : is not a class or namespace name<br />
error C2065: ''String'' : undeclared identifier<br />
  missing '';'' before identifier ''strRegex''<br />
 error C2110: cannot add two pointers<br />
 error C2653: ''System'' : is not a class or namespace name<br />
 error C2065: ''Regex'' : undeclared identifier<br />
 error C2065: ''_Regex'' : undeclared identifier<br />
 error C2065: ''gcnew'' : undeclared identifier<br />
 error C2653: ''System'' : is not a class or namespace name<br />
 error C2106: ''='' : left operand must be l-value<br />
 error C2146: syntax error : missing '';'' before identifier ''Regex''<br />
error C2227: left of ''->IsMatch'' must point to class/struct/union

谢谢

尝试此链接

有效的电子邮件地址验证 [

try this link

Effective Email Address Validation[^]

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