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ASP.NET Address Tutorials
Email validation using regular expressions
This ASP.net code validates any input string that was email address or not. First script checkes all charcters are alphanumeric values such as (a-z,A-Z), numbers (0-9), hyphens (-), underscore (_) and periods (.). Our first rule is to check any un-allowed characters exists. Second step to search an @ sign.
Validate an email address using regular expressions
email address are the means of communication with people around the world. While processing forms email address validation plays an important. Proper email validation strengthen our contact list, ban spamming and protect us from robot form filling (Form AutoFill). Here we are going to design a regular expression pattern to validate email address. which will check to make sure an e-mail address is a valid address, and in proper format means containing an username, at sign (@), and valid hostname. For example, firstname.lastname@example.org is valid, but SPAM@badhost is invalid. Most of email service provides limit the use of literals for email address creation. Only letters (a-z,A-Z), numbers (0-9), hyphens (-), underscore (_) and periods (.) are allowed and no special characters are accepted. You can add or remove any literals to your regular expression.
Regular Expressions IP Address Validation with .net
This regular expression will check for valid Internet Protocol (IP) address. Here we are going to search four decimal numbers groups, each separated by a dot. each set contains zero to three digits. Here regular expression check for two group which on concatenation generate a valid IP address. First group select from 3 alternatives which will find decimal number range from 0 to 255 ending with .(dot or period), exactly 3 repetitions and Second group select from 3 alternatives which will find decimal number range from 0 to 255.
Visitor Informations From Request.ServerVariables Collection
Tutorial explains few methods to know more information about your web site visitors. The ServerVariables collection retrieves the values of predetermined environment variables and request header information. If you've ever wondered how to get your website visitor's name, or their IP address, or the referrer address, then look no more. Request.ServerVariables is almost all you need.
Get Detailed Information About Your Site Visitors In Real Time using ASP.NET
Have you ever wanted to see who is viewing your web site in real time? how many of them are there? what browser they are using? where have they come from? what are their host addresses and host names? and exactly what pages they have read? all in detail? In this article we build an ASP.NET application to do exactly that.