All Web Forms controls, and the page itself, expose the EnableViewState property, a boolean that says whether the current value of the control must be saved in the __VIEWSTATE hidden

A few Web Forms control expose the AutoPostBack property, which makes it possible to start a postback when the user clicks on these controls or changes their contents. By default

In classic ASP, the only way to preserve information – for example, the value of a variable- – between consecutive client requests is by means of Session variables, cookies, or

During a page postback, the page is redrawn by default and users see a short but annoying flickering. Worse, the scroll position isn’t preserved during postbacks (the page scrolls to

In any decent sized application, one of the most common activities is string manipulation at one level or another. One of the most common problems with string manipulation is the

swap(int & a, int & b){a ^= b;b ^= a;a ^= b;}

Some of the most irritating and difficult-to-trace bugs are the ones relating to uninitialized or inaccessible memory locations. This problem becomes especially severe when dealing with parameters that are pointers.

Sometimes it’s useful to get information from a text property file, especially when you want to change values inside classes without recompiling them every time. A simple (and fast) way

You can do this without using the classpath directive at the command line. How? Easy! Just write a launcher! Here’s the code: /* Allow you to type “java QuickRunner” instead

Send an email without using JavaMail API, by using the Java Core packages(java.net.*;java.io.*) to pass three parameters. The first parameter is the SMTP mail server, the second parameter is the

Start the JVM with the “-D” switch to pass properties to the application and read them with the System.getProperty() method. SET myvar = Hello world Set myothervar = nothing java

Who doesn

Many programmers are familiar with declaring an object variable in class modules and other places to capture events from a form and handle them in a generic way: Private WithEvents

Sometimes you might need to determine the full path name to a Windows executable file associated with a given file extension. The usual recourse is to use the FindExecutable API.

When generating a data report based on an ADO recordset linked to a remote database (such as Oracle or SQL Server), you can end up with a blank report. Try

While designing multilingual applications, I had to make them respond when a user changes the Windows locale setting

The MDI look seems to have gone out of favor recently, judging from the popularity of the Explorer and Outlook styles in modern apps. Maybe that

If you

This easy routine copies the contents of a listview, including column headers, to the clipboard for pasting into Excel or other applications: Public Sub SendToClipboard(ByVal ListViewObj _As MSComctlLib.ListView)Dim ListItemObj As

Have you ever wanted to have a hard copy listing all the VB error messages? Create a new standard EXE VB application and drop this code into the Load event

The Clip property of the Cursor is the rectangle within which the mouse cursor is confined, or its value is Nothing if the mouse can move over the entire screen.

Pasting data from the clipboard requires more code because you must ascertain whether the clipboard contains data in one of the formats you’re willing to process. First, use the Clipboard.GetDataObject

Application recycling is a great feature that lets you configure an application so that ASP.NET automatically shuts it down and restarts it after a given period or a given number

As in classic ASP, you can use the Server object from inside any ASP.NET application. This property returns a reference to an HttpServerUtility class.The HttpServerUtility class exposes only two properties:

The ASP.NET Response object has been greatly expanded in its capability to send output to the client browser. For example, the WriteFile method can send the contents of any text,

The new SaveAs method of the Request object saves the current HTTP request to a file, which can be very useful for logging and debugging reasons. You should pass True

The Url and UrlReferrer properties of the Request ASP.NET object return a reference to the URL of the page and the URL of the page that referred to this one.