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ASP.NET Rmi Tutorials
What is Regular expression engines
The primry work of searching any regular expression pattern is done by Regular expression engines. Regular expression engines have differences based on their type and way of there working. There are mainly two Regular expression engines: Deterministic Finite Automaton (DFA) and Nondeterministic Finite Automaton (NFA). DFAs are faster, but lack many of the features of an NFA, such as capturing, look around, and non greedy quantifiers. The NFA further categories in two sub types: traditional NFA and POSIX.
Regular Expressions with .net - U.S. Social Security Numbers
This regular expression will check for valid U.S. Social Security Numbers. Here we are going to search three sets of digits separated by hyphens; the first set contains three digits, the second set contains two digits, and the third set contains four digits. First first group will check wheather all digit are not zero. Then we are performing search between two alternatives, eighter in-between 001 to 699 or in-between 001 to 772. Second group will check wheather two digit are not zero and any range in-between 01 to 99 Second group will check wheather four digit are not zero and any range in-between 0001 to 9999
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.
Importance of Coding Standards for .NET Development
A coding standard is a set of guidelines, rules and regulations on how to write code which will help programmers/developer quickly read and understand source code conforming to the style as well as helping to avoid introducing faults and misunderstanding. Coding standards are important because they provide greater consistency and uniformity in writing code between programmers. This ultimately leads to the code that is easier to understand and maintain which reduces the overall cost of the project.
How to determine what server is given web site running on using ASP.NET?
This comprehensive tutorial will walk you step-by-step to create a single ASP.NET page by which you'll be able to retrieve the server name of any given web site. Explains all the code in detail. Very useful.
Performing custom validation
Demonstrates how to use custom validation on a form by checking to see if a string in a TextBox is not the same with a string from an array (or database), case in which it displays 'This name is already taken'.
Uploading, determining size, width and height and resizing image files
Comprehensive tutorial on uploading image files, determing size ( in bytes ), type ( bmp, jpg, gif ), width and height ( in pixels ) of these images, imposing restrictions to allow images of only certain size, width and height to get uploaded and to resize ( create thumbnails of ) these images.
Quick .Net File Download Security
In this article we will discuss providing a programmable method of securing files on for your ASP.Net applications. This code could come in handy where you have an application hosted on an ISP and you do not have access to a folder outside of your Web directory structure, and you are not able to change permissions on folder in the Web. This method does not require storing your file in a binary field in your database, thus reducing cost of having to buy database storage from your ISP, and with no impact on the network traffic between the database and web servers.