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Validates a strong password. It must be between 8 and 10 characters, contain at least one digit and one alphabetic character, and must not contain special characters

Will verify if the text is is in a valid user name format like: is alphanumeric, starts with an alphabet and contains no special characters other than underscore or dash.

Validates dates that are in month/year (MMYYYY) format without slashes, periods, dashes, or spaces. No special characters or letters allowed. MM values allowed are 01 thru 12. YYYY values allowed are 1900 - 2999. This is an adaptation of Felipe Albacete's MM/YYYY regular expression.

This Regular Expression. I have used with ASP.NET Regular expression for validating that input string should not have special characters(e.g. $,#,@ etc.]

Password length must be between 7 and 20 characters, include at least one alphabetic and one numeric character, and may include some special characters.

Password must have at least 8 characters and maximum of 15 characters with at least one Capital letter, at least one lower case letter and at least one number.Special character is optional. Special characters ",;&|' not allowed.

Password must be 6-40 characters - {6,40} Must have no spaces, at least 1 digit (?=.*[\d]), at least 1 uppercase letter (?=.*[A-Z]) and at least one lowercase letter (?=.*[a-z]). Allows specifying special characters - !@#$%_

Check Password: 5 - 10 characters long, start with a letter and contain at least one number. No special characters

Simply match to a combination of 5 characters, using capital letters and numbers only. No special characters or lower case letters.

This RE will identify all the special characters(non alpha/numeric).

A regexp for general username entry. Which doesn't allow special characters other than underscore. Username must be of length ranging(3-30). starting letter should be a number or a character.

Validates passwords to be 6-20 characters of letter and numbers and NO special characters (that appear on the keyboard). Adjust numbers at the end and remove special characters (after the "(?!") as needed. Numbers appear at the END to address an IE problem with zero-width look-aheads.

This expression validates alphanumeric with one alphabet compulsory and one numeric compulsory and accepts minimum 6 characters and max 15 characters irrespective of the order and case.It doesnt accept special characters

This will allow user to enter only AlphaNumeric values. you can use as a Regular expression in Asp.net from version 1.1,2.0,3.5 eg: Your Textbox can not contain special characters like @ # $ % ^ & * ( )

Field Should accept only - and . in special characters and it should allow only numeric data

This expression will validate user name with the following rules 1- It must start and end with a digit or character 2- It must be exactly 4 to 10 character long 3- Allowed Special Characters are _.-

User can specify n numbers of digits, upper case character and special character. In this example, we will use two special characters, digits and upper case in the password. Explanation: (?=^.{12,25}$) -- password length range from 12 to 25 (?=(?:.*?[!@#$%*()_+^&}{:;?.]){2}) -- at least 2 special characters (!@#$%*()_+^&}{:;?.}) (?=(?:.*?\d){2}) -- at least 2 digits (?=.*[a-z]) -- characters a-z (?=.{2,}[A-Z]) -- at least 2 upper case characters

Regular Expression which does not allow SPACE but allows every possible alpha-numeric and special characters.

to accept only alphanumeric with all special characters except (double/single Quotes). and if numbers then only positive numbers

Matches most valid ArcCatalog FeatureClass catalog paths. Rejects most invalid paths. Accepts mapped drive letters and UNC network paths. UNC Server names must begin with a letter and may only include letters and numbers. Will not accept directories that include ".gdb", ".mdb", ".sde", or ".mdf" in their name. Otherwise accepts mid-string spaces and "."s (dots) in directory names. Will not accept special characters in FeatureDataset or BaseName. Will not accept FeatureDatasets or BaseNames that begin with a number. Limits total path length to 160 characters. Accepts file, personal, sde, and SQL GDBs, as well as shapefiles. Shapefiles have the ".shp" extension and cannot appear in geodatabases. Accepts GDB Feature Datasets. Identifies <Workspace>, <Root>, <Drive>, <Server>, <DirectoryTree>, <Directory>, <Geodatabase>, <GDBName>, <Extension>, <FeatureDataset>, and <BaseName> as sub-strings.