iansinke - Developer IT

Non-Airport Express wirless N router with audio server

- by iansinke

I'm interested in hooking up three things to a wireless router: speakers, a printer, and a hard disk. At first the obvious solution was Airport Express, but then I found out that Airport Express does not support hard disks. Any ideas as to other wireless routers that would have the requisite feature set?

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Overlapping appointments in Outlook 2003

- by iansinke

I'm using Microsoft Outlook 2003 (Home and Student, if that makes any difference, which I doubt) as my calendar, and I have one minor gripe: it can't really handle appointments that don't begin and end right on the half-hour mark. For instance, if I have a class that ends at 9:22 AM and another class that begins at 9:27 AM, they will appear to overlap in the day view. Not a big deal, but it bugs me nonetheless. Anybody know of a hack or patch that will fix this issue? I've searched the Outlook documentation as well as Google to no avail.

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Database theory - relationship between two tables

- by iansinke

I have a database with two tables - let's call them Foo and Bar. Each foo may be related to any number of bars, and each bar may be related to any number of foos. I want to be able to retrieve, with one query, the foos that are associated with a certain bar, and the bars that are associated with a certain foo. My question is, what is the best way of recording these relationships? Should I have a separate table with records of each relationship (e.g. two columns, foo and bar)? Should the foo table have a column for a list of bars, and vice versa? Is there another option that I'm overlooking? I'm using SQL Server, if that makes a difference.

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ASP.Net Textbox control doesn't return NULL when it is empty

- by iansinke

In reference to this question that I just asked, http://stackoverflow.com/questions/2451579/sql-select-all-when-filter-value-is-empty, it appears that for some reason, an empty text box's value is not being fed to SQL Server as NULL, as it ought to be. Any ideas on how to fix this?

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SQL - Select all when filter value is empty

- by iansinke

I have a SQL query in my ASP.net web app that looks like this: SELECT * FROM [Records] WHERE ([title] LIKE '%' + @title + '%') @title, of course, is the value of a text box on the page. My question is, why, when the text box is empty, does this return nothing? And how can I make it return everything, like logic tells me it ought to?

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How to implement a grapher in C#

- by iansinke

So I'm writing a graphing calculator. So far I have a semi-functional grapher, however, I'm having a hard time getting a good balance between accurate graphs and smooth looking curves. The current implementation (semi-pseudo-code) looks something like this: for (float i = GraphXMin; i <= GraphXMax; i++) { PointF P = new PointF(i, EvaluateFunction(Function, i) ListOfPoints.Add(P) } Graphics.DrawCurve(ListOfPoints) The problem with this is since it only adds a point at every integer value, graphs end up distorted when their turning points don't fall on integers (e.g. sin(x)^2). I tried incrementing i by something smaller (like 0.1), which works, but the graph looks very rough. I am using C# and GDI+. I have SmoothingMethod set to AntiAlias, so that's not the problem, as you can see from the first graph. Is there some sort of issue with drawing curves with a lot of points? Should the points perhaps be positioned exactly on pixels? I'm sure some of you have worked on something very similar before, so any suggestions? While you're at it, do you have any suggestions for graphing functions with asymptotes? e.g. 1/x^2 P.S. I'm not looking for a library that does all this - I want to write it myself.

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