This article is part II of a series of articles on sending emails from ASP.NET. In the part I, we learned how to send simple text/html email messages. What that article didn't cover was how to validate user input i.e. what if user enters nothing or enters invalid information in the HTML form input boxes and how to send mass emails to a list of email addresses without the user knowing that the same email has been sent to other users as well.

"The author writes 'With ASP.NET you can configure the 'ASP.NET engine' to automatically

The .net framework provides the Dataset object which is designed to handle data abstractly independent of the data source. The DataSet can handle data from variety of sources like SQL, XML etc. In this article we'll show you how to bind a data grid control to data in an XML file using the DataSet class.

First off, let me stress that this is not simply a new version of ASP with a couple new features and some bug fixes like ASP 3.0 was when you compared it to ASP 2.0. This is a whole new system built from the ground up that takes the strong points of ASP and tries to expand on them, but at the same time fixes many of the shortcomings of the existing ASP implementation. Since there's so much to cover, I'm going to break

To wait or not to wait; that is the question! Whether or not to implement asynchronous processing is one of the fundamental issues that a developer must answer when invoking function calls across process boundaries. Given that the option to invoke an asynchronous call is available, the programmer has to weigh the relative ease of coding synchronous calls with its inherent drawback - when a synchronous call is made, the calling thread is blocked and has to wait until the function completes. In many instances, this is an acceptable shortcoming, as in the case when a program's logic flow should not continue until data is retrieved from a database. Asynchronous processing, on the other hand, allows more parallelism. A thread that initiates an asynchronous call is not blocked and can therefore do almost any computation while the method is in transit. The case for asynchronous processing becomes very compelling in the enterprise computing space where systems need to handle hundreds of thousands of function call requests and synchronicity may become a barrier to scalability.

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? Well, if you have wanted or want any of it, then keep reading.

Sample chapter from 'Visual Basic .NET Developer's Guide to ASP.NET, XML and ADO.NET' on ASP.NET controls, code-behind, Page object, web controls, HTML controls and Page object reference.

Complete online chapter 'Talking To HailStorm' from 'Early Adopter HailStorm (.NET My Services)'. Provides in depth information on what is .NET My Services, what it provides and how to make use of it.

In this tutorial we will learn how to send e-mails of both text and HTML formats using classes of System.Web.Mail namespace. Before delving in to the source code, I'll briefly explain the MailMessage and SmtpMail classes which we'll be using to send e-mails.

File uploading has always been a tedious task for the web developer community. Either we have to use a third party component or write several lines of code. With the advent of ASP.NET file uploading has become a lot easier, importantly without the need for third party components. All we have to do is to use the ASP.NET HTML File control and write a few lines of C# code.This article guides you through the file uploading process. In classic ASP we would use the HTML file control for uploading files. In ASP.net we replace this with the ASP.NET HTML File control.The declaration of ASP.NET HTML file control is much like normal HTML file control except for the runat attribute set to server.