Common Regular Expressions C #

  /// <summary>        ///whether the phone number/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIsphone (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"^[1]+[3,5,8]+\d{9}"); }        /// <summary>        ///is the time format for XXXX-XX-XX/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIsdatetime (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"\d{4}-(1[0-2]|[ 0]?\d)-(3[01]|[ 0-2]?\d)"); }        /// <summary>        ///is the name of 4 characters or less (including 4)/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIsname (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"^[\u4e00-\u9fa5]{0,4}$"); }        /// <summary>        ///verify your ID card/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIsidcard (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"(^\d{18}$) | (^\d{15}$)"); }        /// <summary>        ///Verify if it is a postal code/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIspostalcode (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"^\d{6}$"); }        /// <summary>        ///Verify that you are a mailbox/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIsemail (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"\w+ ([-+. '] \w+) *@\w+ ([-.] \w+) *\.\w+ ([-.] \w+) *"); }        /// <summary>        ///verify whether it is a combination of pure numbers and letters/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIsnumandword (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"^ (-?\d+) (\.\d+) $"); }        /// <summary>        ///Verify that it is a pure letter/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIsword (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"^[a-za-z]+$"); }       /// <summary>       ///Verify the Password Authentication policy for any two combinations of six digits, symbols, and letters/// </summary>       /// <param name= "str" ></param>       /// <returns></returns>         Public Static BOOLIshunhe (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"^[a ^ (?! [0-9]+$) (?! [a-za-z]+$) (?! ([^ (0-9a-za-z)]| [\(\)]) +$) ([^ (0-9a-za-z)]| [\(\)]| [a-za-z]| [0-9]) {6,}$"); }        /// <summary>        ///determine if the double precision/// </summary>        /// <param name= "str" ></param>        /// <returns></returns>         Public Static BOOLIsdouble (stringstr) {            returnSystem.Text.RegularExpressions.Regex.IsMatch (str,@"^[-\+]?\d+ (\.\d+) $"); }

All the regular is found on the Internet, here to make a summary, some mistakes please correct me.

Common Regular Expressions C #