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Since 1998, DevX has helped people start businesses, build websites, and provide enterprise technology to people globally. Interviewing the likes of Microsoft’s co-founder, Steve Ballmer, the publication brings comprehensive, reliable, and accessible insights to the Internet.
dding indexes to tables is the most effective way to optimize your SQL Server query performance. Tables that you query often may require several indexes in order to handle the
odern applications are no longer isolated, stand-alone applications, limited to a single process or machine. Distributed applications allow you to put components in close proximity to the resources they use,
asting, or converting the value of a token from one type of data to another is common to most (if not all) programming languages. Visual Basic has long had a
irst, a quick review of exactly what reflection is and what it is used for. From Part 1, you know that “Reflection is a means of discovering information about objects
ord, Excel and PowerPoint all use VBA, so you would think that using Automation in one should be pretty much like using Automation in another, right? In fact, they do
n a recent interview with DevX, Alex Slawsby, research analyst for smart handheld devices at IDC, laid out a challenging roadmap for developers preparing to take the plunge into wireless
xtender classes do just that; they allow you to extend the functionality of a .NET control class. The Error Provider and Tooltip classes are two examples of extender classes in
‘m writing this column in my head at about 3 am on a Sunday morning, while staring at the roof of a swaying tent on top of a mountain in
elcome to this first issue of 2003. We have some interesting things in this issue for you. The first item to note is our coverage of Visual C++ 2003. YES,
hen I first met the ASP.NET DataGrid control, it was love at first sight. Together we built several applications, taught dozens of classes, published countless articles and tips; we even
he promise of write-once-run-anywhere is arguably more attractive and far more economically advantageous for developers targeting mobile devices; mobile hardware is so diverse that cutting development time by writing one
everal months ago I sat down to write an editorial for DevX, which I had tentatively titled “Where’s My Wireless Killer App?” The premise of this editorial was to be,
i-Fi wireless LANs are exploding in the corporation. Corporations have adopted 11.6 million Wi-Fi devices in 2002, a 65 percent increase over 2001, according to market researcher In-Stat/MDR. Notebooks, PDAs,
he job ahead of creating new wireless applications and extending traditional desktop applications to mobile devices is somewhat ominous, but the good news, according to Gartner Research Analyst Theresa Lanowitz,
f 802.11 wireless LANs promise to untether corporate users from their wired network connections, then Voice over Wireless IP (VoWIP) promises to free them from their telephone handsets. VoWIP is
eaching critical mass for wireless in the enterprise has been a long time coming. Interest in and reliance on wireless technology has crept steadily ahead, but for several years now,
t’s tempting to think that we might be at or near the peak of the curve for wireless device proliferation, but that’s nowhere near the truth. Ken Dulaney, vice president
Editor’s Note: Martyn Mallick is a wireless solutions evangelist at iAnywhere Solutions, a vendor of mobile database solutions. Though the article is not impartial, we have sought it for publication
ireless networks are slowly evolving from yesterday’s 1G analog systems to tomorrow’s 3G high-speed, digital networks. Throughout the world, every country is at a different phase of building networks to
ven as wireless hardware diversifies (see sidebar “Inspecting the Ranks“), there’s a simultaneous convergence of sorts going on, but that convergence is happening inside devices, not outside. “The great thing
here’s no lack of innovation going on in the wireless area and the technology is maturing fast. But still, the vast majority of developers have avoided taking the wireless plunge.
The DataTable class has a method, Compute, that executes SQL-like functions on the rows locally stored in the DataTable. It supports functions such as COUNT, SUM, MIN, MAX, AVG and
‘ Backup the specified database.’ Note: requires Imports System.Data.SqlClient” Example:’ Dim connString As String = “server=(local); user id=sa; password=; ‘ Database=master;”‘ Try’ BackupDatabase(connString, “MyTestDB”, “D:MyTestDbBackup.bak”)’ Catch ex As Exception’ MessageBox.Show(ex.Message)’
‘ This function opens the OLEDB dialog to create an OLEDB connection string,’ and return the selection’ It requires the OLEDB Service Component 1.0 Type Library to workPublic Function CreateConnString(Optional
‘ Restore the specified database.’ Note: requires Imports System.Data.SqlClient” Example:’ Dim connString As String = “server=(local); user id=sa; password=; ‘ Database=master;”‘ Try’ RestoreDatabase(connString, “MyTestDB”, “D:MyTestDbBackup.bak”)’ Catch ex As Exception’ MessageBox.Show(ex.Message)’
‘ Create a SQL Server database with the specified name.’ If the second parameter is True and a DB with the same name is already ‘ present,’ it is dropped
The DataSet is a container of multiple DataTables, and it allows to create parent-child relationships between two tables, as shown below: ‘ create a relationship between the Categories and the
s an open source add-on for the Apache Jakarta Struts Framework (or Struts), StrutsCX has its roots in a pure XML- and XSLT-based, multi-language and multi-layout project. With StrutsCX you
wap() is one of those tricky algorithms that has several implementations, each of which offers its own advantages and disadvantages. In the following sections I will show why familiarity with
Introductionack in January of 2002, I was thumbing through the December issue of elementkjournal’s, “Inside Microsoft Access”, when I came across the MSDN article entitled, “Graphically Display Percentages on Forms
