String Checking Collection

During the login function or some other secure pages development, we always need string validation to ensure the data correction before it is inserted database. In this article I note them during each developing work.



1. 檢查字串是否包含特定字元 | Contains specify symbol, letter etc.
System.Text.RegularExpressions.Regex.IsMatch(argValue, "[A-Z]")
System.Text.RegularExpressions.Regex.IsMatch(argValue, "[0-9]")
System.Text.RegularExpressions.Regex.IsMatch(argValue, "[a-z]")
System.Text.RegularExpressions.Regex.IsMatch(argValue, "[/u0000-/u00FF]")

2. 檢查字串是否為E-mail格式 | Email format
Regex.IsMatch(emailAddress,
@"^(?("")("".+?""@)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])@))" +
@"(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$");