我写了正则表达式来验证URL，可能就像
example.com
www.example.com
所有4个都在工作
现在，如果我输入的文本（www.example.com - thisisincorrect），则允许我输入并保存到db
我使用的正则表达式是：
http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
和
([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
请帮忙！
答案 0 :(得分：69)
您不需要网址的正则表达式，请使用System.Uri类。例如。通过使用Uri.IsWellFormedUriString方法：
bool isUri = Uri.IsWellFormedUriString(url, UriKind.RelativeOrAbsolute);
答案 1 :(得分：29)
添加^和$
^http(s)?://([\w-]+.)+[\w-]+(/[\w- ./?%&=])?$
这匹配字符串（^）和结束（$）
答案 2 :(得分：15)
最佳正则表达式：
private bool IsUrlValid(string url)
{
string pattern = @"^(http|https|ftp|)\://|[a-zA-Z0-9\-\.]+\.[a-zA-Z](:[a-zA-Z0-9]*)?/?([a-zA-Z0-9\-\._\?\,\'/\\\+&%\$#\=~])*[^\.\,\)\(\s]$";
Regex reg = new Regex(pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
return reg.IsMatch(url);
}
答案 3 :(得分：2)
在为严格匹配创建正则表达式时，必须确保它以“^”开头并以“$”结束。否则，正则表达式将查看是否找到匹配的子字符串。
然而，使用正则表达式来匹配URL是容易出错的：更好地依赖现有框架做得更好（url中有很多潜在的陷阱，比如参数，未知域，包含ip而不是域的url ...... 。）
答案 4 :(得分：1)
您正在寻找
没有Http：
@"^(www.|[a-zA-Z].)[a-zA-Z0-9\-\.]+\.(com|edu|gov|mil|net|org|biz|info|name|museum|us|ca|uk)(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\;\?\'\\\+&%\$#\=~_\-]+))*$"
使用Http（s）：
@"^(((ht|f)tp(s?))\://)?(www.|[a-zA-Z].)[a-zA-Z0-9\-\.]+\.(com|edu|gov|mil|net|org|biz|info|name|museum|us|ca|uk)(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\;\?\'\\\+&%\$#\=~_\-]+))*$"
或
@"^[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?$";
答案 5 :(得分：0)
这对我有用：
string pattern = @"^(ht|f)tp(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&%\$#_]*)?$";
Regex regex = new Regex(pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
string url= txtAddressBar.Text.Trim();
if(regex.IsMatch(url)
{
//do something
}
答案 6 :(得分：0)
这是为了同时支持http和https，并确认url中不包含空格。
this.isValidURL = function (url) {
if (!url) return false;
const expression = /^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~:/?#[\]@!\$&'\(\)\*\+,;=.]+$/gm;
return url.match(new RegExp(expression));
}
答案 7 :(得分：0)
我想与您分享@ sach4all regexp查询的高级版本，该版本检查所有链接是否具有正确的超域，以防某些链接仅伪造了正确的URL地址。
@"(www.|[a-zA-Z].)[a-zA-Z0-9\-\.]+\.(AAA|AARP|ABARTH|ABB|ABBOTT|ABBVIE|ABC|ABLE|ABOGADO|ABUDHABI|AC|ACADEMY|ACCENTURE|ACCOUNTANT|ACCOUNTANTS|ACO|ACTIVE|ACTOR|AD|ADAC|ADS|ADULT|AE|AEG|AERO|AETNA|AF|AFAMILYCOMPANY|AFL|AFRICA|AG|AGAKHAN|AGENCY|AI|AIG|AIGO|AIRBUS|AIRFORCE|AIRTEL|AKDN|AL|ALFAROMEO|ALIBABA|ALIPAY|ALLFINANZ|ALLSTATE|ALLY|ALSACE|ALSTOM|AM|AMERICANEXPRESS|AMERICANFAMILY|AMEX|AMFAM|AMICA|AMSTERDAM|ANALYTICS|ANDROID|ANQUAN|ANZ|AO|AOL|APARTMENTS|APP|APPLE|AQ|AQUARELLE|AR|ARAB|ARAMCO|ARCHI|ARMY|ARPA|ART|ARTE|AS|ASDA|ASIA|ASSOCIATES|AT|ATHLETA|ATTORNEY|AU|AUCTION|AUDI|AUDIBLE|AUDIO|AUSPOST|AUTHOR|AUTO|AUTOS|AVIANCA|AW|AWS|AX|AXA|AZ|AZURE|BA|BABY|BAIDU|BANAMEX|BANANAREPUBLIC|BAND|BANK|BAR|BARCELONA|BARCLAYCARD|BARCLAYS|BAREFOOT|BARGAINS|BASEBALL|BASKETBALL|BAUHAUS|BAYERN|BB|BBC|BBT|BBVA|BCG|BCN|BD|BE|BEATS|BEAUTY|BEER|BENTLEY|BERLIN|BEST|BESTBUY|BET|BF|BG|BH|BHARTI|BI|BIBLE|BID|BIKE|BING|BINGO|BIO|BIZ|BJ|BLACK|BLACKFRIDAY|BLANCO|BLOCKBUSTER|BLOG|BLOOMBERG|BLUE|BM|BMS|BMW|BN|BNL|BNPPARIBAS|BO|BOATS|BOEHRINGER|BOFA|BOM|BOND|BOO|BOOK|BOOKING|BOSCH|BOSTIK|BOSTON|BOT|BOUTIQUE|BOX|BR|BRADESCO|BRIDGESTONE|BROADWAY|BROKER|BROTHER|BRUSSELS|BS|BT|BUDAPEST|BUGATTI|BUILD|BUILDERS|BUSINESS|BUY|BUZZ|BV|BW|BY|BZ|BZH|CA|CAB|CAFE|CAL|CALL|CALVINKLEIN|CAM|CAMERA|CAMP|CANCERRESEARCH|CANON|CAPETOWN|CAPITAL|CAPITALONE|CAR|CARAVAN|CARDS|CARE|CAREER|CAREERS|CARS|CARTIER|CASA|CASE|CASEIH|CASH|CASINO|CAT|CATERING|CATHOLIC|CBA|CBN|CBRE|CBS|CC|CD|CEB|CENTER|CEO|CERN|CF|CFA|CFD|CG|CH|CHANEL|CHANNEL|CHARITY|CHASE|CHAT|CHEAP|CHINTAI|CHRISTMAS|CHROME|CHRYSLER|CHURCH|CI|CIPRIANI|CIRCLE|CISCO|CITADEL|CITI|CITIC|CITY|CITYEATS|CK|CL|CLAIMS|CLEANING|CLICK|CLINIC|CLINIQUE|CLOTHING|CLOUD|CLUB|CLUBMED|CM|CN|CO|COACH|CODES|COFFEE|COLLEGE|COLOGNE|COM|COMCAST|COMMBANK|COMMUNITY|COMPANY|COMPARE|COMPUTER|COMSEC|CONDOS|CONSTRUCTION|CONSULTING|CONTACT|CONTRACTORS|COOKING|COOKINGCHANNEL|COOL|COOP|CORSICA|COUNTRY|COUPON|COUPONS|COURSES|CR|CREDIT|CREDITCARD|CREDITUNION|CRICKET|CROWN|CRS|CRUISE|CRUISES|CSC|CU|CUISINELLA|CV|CW|CX|CY|CYMRU|CYOU|CZ|DABUR|DAD|DANCE|DATA|DATE|DATING|DATSUN|DAY|DCLK|DDS|DE|DEAL|DEALER|DEALS|DEGREE|DELIVERY|DELL|DELOITTE|DELTA|DEMOCRAT|DENTAL|DENTIST|DESI|DESIGN|DEV|DHL|DIAMONDS|DIET|DIGITAL|DIRECT|DIRECTORY|DISCOUNT|DISCOVER|DISH|DIY|DJ|DK|DM|DNP|DO|DOCS|DOCTOR|DODGE|DOG|DOHA|DOMAINS|DOT|DOWNLOAD|DRIVE|DTV|DUBAI|DUCK|DUNLOP|DUNS|DUPONT|DURBAN|DVAG|DVR|DZ|EARTH|EAT|EC|ECO|EDEKA|EDU|EDUCATION|EE|EG|EMAIL|EMERCK|ENERGY|ENGINEER|ENGINEERING|ENTERPRISES|EPOST|EPSON|EQUIPMENT|ER|ERICSSON|ERNI|ES|ESQ|ESTATE|ESURANCE|ET|ETISALAT|EU|EUROVISION|EUS|EVENTS|EVERBANK|EXCHANGE|EXPERT|EXPOSED|EXPRESS|EXTRASPACE|FAGE|FAIL|FAIRWINDS|FAITH|FAMILY|FAN|FANS|FARM|FARMERS|FASHION|FAST|FEDEX|FEEDBACK|FERRARI|FERRERO|FI|FIAT|FIDELITY|FIDO|FILM|FINAL|FINANCE|FINANCIAL|FIRE|FIRESTONE|FIRMDALE|FISH|FISHING|FIT|FITNESS|FJ|FK|FLICKR|FLIGHTS|FLIR|FLORIST|FLOWERS|FLY|FM|FO|FOO|FOOD|FOODNETWORK|FOOTBALL|FORD|FOREX|FORSALE|FORUM|FOUNDATION|FOX|FR|FREE|FRESENIUS|FRL|FROGANS|FRONTDOOR|FRONTIER|FTR|FUJITSU|FUJIXEROX|FUN|FUND|FURNITURE|FUTBOL|FYI|GA|GAL|GALLERY|GALLO|GALLUP|GAME|GAMES|GAP|GARDEN|GB|GBIZ|GD|GDN|GE|GEA|GENT|GENTING|GEORGE|GF|GG|GGEE|GH|GI|GIFT|GIFTS|GIVES|GIVING|GL|GLADE|GLASS|GLE|GLOBAL|GLOBO|GM|GMAIL|GMBH|GMO|GMX|GN|GODADDY|GOLD|GOLDPOINT|GOLF|GOO|GOODYEAR|GOOG|GOOGLE|GOP|GOT|GOV|GP|GQ|GR|GRAINGER|GRAPHICS|GRATIS|GREEN|GRIPE|GROCERY|GROUP|GS|GT|GU|GUARDIAN|GUCCI|GUGE|GUIDE|GUITARS|GURU|GW|GY|HAIR|HAMBURG|HANGOUT|HAUS|HBO|HDFC|HDFCBANK|HEALTH|HEALTHCARE|HELP|HELSINKI|HERE|HERMES|HGTV|HIPHOP|HISAMITSU|HITACHI|HIV|HK|HKT|HM|HN|HOCKEY|HOLDINGS|HOLIDAY|HOMEDEPOT|HOMEGOODS|HOMES|HOMESENSE|HONDA|HONEYWELL|HORSE|HOSPITAL|HOST|HOSTING|HOT|HOTELES|HOTELS|HOTMAIL|HOUSE|HOW|HR|HSBC|HT|HU|HUGHES|HYATT|HYUNDAI|IBM|ICBC|ICE|ICU|ID|IE|IEEE|IFM|IKANO|IL|IM|IMAMAT|IMDB|IMMO|IMMOBILIEN|IN|INC|INDUSTRIES|INFINITI|INFO|ING|INK|INSTITUTE|INSURANCE|INSURE|INT|INTEL|INTERNATIONAL|INTUIT|INVESTMENTS|IO|IPIRANGA|IQ|IR|IRISH|IS|ISELECT|ISMAILI|IST|ISTANBUL|IT|ITAU|ITV|IVECO|JAGUAR|JAVA|JCB|JCP|JE|JEEP|JETZT|JEWELRY|JIO|JLL|JM|JMP|JNJ|JO|JOBS|JOBURG|JOT|JOY|JP|JPMORGAN|JPRS|JUEGOS|JUNIPER|KAUFEN|KDDI|KE|KERRYHOTELS|KERRYLOGISTICS|KERRYPROPERTIES|KFH|KG|KH|KI|KIA|KIM|KINDER|KINDLE|KITCHEN|KIWI|KM|KN|KOELN|KOMATSU|KOSHER|KP|KPMG|KPN|KR|KRD|KRED|KUOKGROUP|KW|KY|KYOTO|KZ|LA|LACAIXA|LADBROKES|LAMBORGHINI|LAMER|LANCASTER|LANCIA|LANCOME|LAND|LANDROVER|LANXESS|LASALLE|LAT|LATINO|LATROBE|LAW|LAWYER|LB|LC|LDS|LEASE|LECLERC|LEFRAK|LEGAL|LEGO|LEXUS|LGBT|LI|LIAISON|LIDL|LIFE|LIFEINSURANCE|LIFESTYLE|LIGHTING|LIKE|LILLY|LIMITED|LIMO|LINCOLN|LINDE|LINK|LIPSY|LIVE|LIVING|LIXIL|LK|LLC|LOAN|LOANS|LOCKER|LOCUS|LOFT|LOL|LONDON|LOTTE|LOTTO|LOVE|LPL|LPLFINANCIAL|LR|LS|LT|LTD|LTDA|LU|LUNDBECK|LUPIN|LUXE|LUXURY|LV|LY|MA|MACYS|MADRID|MAIF|MAISON|MAKEUP|MAN|MANAGEMENT|MANGO|MAP|MARKET|MARKETING|MARKETS|MARRIOTT|MARSHALLS|MASERATI|MATTEL|MBA|MC|MCKINSEY|MD|ME|MED|MEDIA|MEET|MELBOURNE|MEME|MEMORIAL|MEN|MENU|MERCKMSD|METLIFE|MG|MH|MIAMI|MICROSOFT|MIL|MINI|MINT|MIT|MITSUBISHI|MK|ML|MLB|MLS|MM|MMA|MN|MO|M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UNG-PWB|XN--VHQUV|XN--VUQ861B|XN--W4R85EL8FHU5DNRA|XN--W4RS40L|XN--WGBH1C|XN--WGBL6A|XN--XHQ521B|XN--XKC2AL3HYE2A|XN--XKC2DL3A5EE0H|XN--Y9A3AQ|XN--YFRO4I67O|XN--YGBI2AMMX|XN--ZFR164B|XXX|XYZ|YACHTS|YAHOO|YAMAXUN|YANDEX|YE|YODOBASHI|YOGA|YOKOHAMA|YOU|YOUTUBE|YT|YUN|ZA|ZAPPOS|ZARA|ZERO|ZIP|ZIPPO|ZM|ZONE|ZUERICH|ZW)(\:[0-9]+)*(/($|[a-zA-Z0-9\.\,\;\?\'\\\+&%\$#\=~_\-]+))*$
超级域列表于2019年1月1日从http://data.iana.org/TLD/tlds-alpha-by-domain.txt收集
答案 8 :(得分：0)
尝试：
bool IsValidURL(string URL)
{
string Pattern = @"^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~:/?#[\]@!\$&'\(\)\*\+,;=.]+$";
Regex Rgx = new Regex(Pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase);
return Rgx.IsMatch(URL);
}
它将接受这样的URL：
答案 9 :(得分：0)
我做了一个可以找到链接的人-非常出色：
(\b(http|ftp|https):(\/\/|\\\\)[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?|\bwww\.[^\s])