摘要： ValidationExpression="http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?" can not work"http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?" this regular expression is given by Visuial studio. we use that to valid Url format.But if the the url contains "+" symbol. we will s 阅读全文