Browsing Questions About c# (1)

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,…

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...?

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?: …

I am aware in .net there are three timer types (see http://msdn.microsoft.com/en-us/magazine/cc164015.aspx ). I have chosen a the threaded timer as the other types can drift if the main thread is busy and I need this to be reliable. The way this timer works in the control of the timer is put on…

Let's say I have a DataTable with a Name column. I want to have a collection of the unique names ordered alphabetically. The following query ignores the order by clause. var names = (from DataRow dr in dataTable.Rows orderby (string)dr["Name"] select (string)dr["Name"]).Distinct()…

In .NET perspective: What is a Memory Leak ? How to understand whether your application leaks? What are the effects? How to prevent a memory leak? If your application has memory leak, does it go away when the process exits or killed? Or do memory leaks in your application affects other …

Recently our site has been deluged with the resurgence of the ASPRox bot SQL Injection attack. Without going into details, the attack attempts to execute SQL code by encoding the T-SQL commands in an ASCII encoded BINARY string. It looks something like this: DECLARE%20@S%20NVARCHAR(4000);SET%20…

Anyone know of a good way to do this in C# quickly? Handling large files might be necessary. Thanks in advance? :)

I want to print HTML from a C# web service. The Web Browser control is overkill, and does not function well in a service-environment, nor does it function well on a system with very tight security constraints. Is there any sort of free .NET library that will support the printing of a basic HTML pa…

One of the fun parts of multi-cultural programming are numbers formats. Americans use 10,000.50, Germans use 10.000,50, French use 10 000,50 etc. My first approach would be to take the string, parse it backwards, until I encounter a separator and use this as my decimal separator. There is an ob…

I have a little game written in C#. It uses a database as back-end. It's a trading card game , and I wanted to implement the function of the cards as a script. What I mean is that I essentially have an interface, ICard , which a card class implements ( public class Card056 : ICard ) and which …

I often have a Dictionary of keys & values and need to sort it by value. For example, I have a hash of words and their frequencies, and want to order them by frequency. There's SortedList which is good for a single value (frequency), but I want to map it back to the word. SortedDictionar…