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I'm new to C#, and I want to use a track-bar to change a form's opacity. This is my code: decimal trans = trackBar1.Value / 5000; this.Opacity = trans; When I try to build it, I get this error: Cannot implicitly convert type 'decimal' to 'double' I tried making trans a double,…

I have an absolutely positioned div containing several children, one of which is a relatively positioned div . When I use a percentage-based width on the child div , it collapses to 0 width on IE7, but not on Firefox or Safari. If I use pixel width, it works. If the parent is relatively positio…

Are there any conversion tools for porting Visual J# code to C#?

Given a DateTime representing their birthday, how do I calculate someone's age?

Given a specific DateTime value, how do I display relative time, like 2 hours ago 3 days ago a month ago etc, etc...?

Is there a standard way for a web server to determine what time zone offset a user is in? From an HTTP header or part of the user-agent description, perhaps?

What is the difference between Math.Floor() and Math.Truncate() in C#?

How do you expose a LINQ query as an ASMX web service? Usually, from the business tier, I can return a typed DataSet or DataTable which can be serialized for transport over ASMX. How can I do the same for a LINQ query? Is there a way to populate a typed DataSet or DataTable via a LINQ query?: …

How do I store binary data in MySQL ?

Solutions welcome in any language. :-) I'm looking for the fastest way to obtain the value of pi, as a personal challenge. More specifically I'm using ways that don't involve using #define d constants like M_PI , or hard-coding the number in. The program below tests the various ways I know of. …

I'm trying to track the progress of PHP 5.3 and PHP 6 and I occassionally see blogs posting information but there doesn't seem to be an authoritative source. Does anybody know where there is an official summary of possible new features? EDIT: There are some meeting notes that have been around f…

If I have a trigger BEFORE UPDATE on a table. How can I throw an error that prevents the update on that table?

I've been having issues getting the C sockets API to work properly in C++. Specifically, although I am including sys/socket.h, I still get compile time errors telling me that AF_INET is not defined. Am I missing something obvious, or could this be related to the fact that I'm doing this coding on …

Does anyone know how to forcefully unload a ByteArray from memory in AS3? I have tried (without success): byteArray.length = 0; byteArray = new ByteArray(); and for ( var i:int=0; i<byteArray.length; i++ ) { byteArray[i] = null; } Any ideas?

How can I monitor a MSSQL database for changes to a table without using triggers or modifying the structure of the database in any way? My preferred programming environment is .Net and C# (edits) I'd like to support MS SQL 2000 SP4 or higher by "changes to a table" I mean changes to table…