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Cookies can be especially maddening at times if you don’t know what values are being stored within them. The following simple script is written in csharp and ASP.Net and allows you to see all of the cookies currently hanging around under a given application. Pretty handy when trying to fish yourself out of a problem.
Lots of systems sit behind an NT Authentication wall to keep the unwanted users out, but does it really do you any good if you don’t know which user made a given update to a system. Also this is good if you want to give a certain user administrative privledges, displaying certain functionality while hiding it from the rest of your users. The easiest way to get at that piece of information is to jump down into the System.Security.Principal.WindowsIdentity class and hit up the GetCurrent().Name method. Note this will pull back the user name preceeded by the domain they are logged onto so to ditch that you’ll just need to clean it up with a Regex statement (ex: Regex.Replace(sNTUser,”DOMAINNAME.”,”"))
I was compiling a string this afternoon with several options drawn from the database. I put in a hyphen to seperate each element to keep everything looking neat. It was something like this:
That is all nice and good and all, but it gives us one too many trailing hyphens like this:
Lettuce – Tomato – Onion -So to get around this, we need to chop off that last character from the string so we have a clean string. The solution is very simple. We call the Remove() function and point it to one character before the end of our string (determined by calculating the length of the string). Consider that sucker removed.
I did the bookend post to this a couple weeks back (i.e. how to read from a file) so its time I wrapped this topic up. Where the writing function was StreamWriter, we instead use StreamReader to extract the text from the document. Pretty logical right? In the example below, I’m pulling a block of code out of a text file named code.txt so I can append it to the header of a document I’m getting ready to generate. So once I’ve told the StringReader which file we are working with, we need to loop through that file line by line to suck them into the reader. In this case I’m storing that output in a string variable I’ve called sCode. Finally, once we’ve captured all the file’s contents we close the StreamReader to release our resources. Don’t forget to make your reference to System.IO or Visual Studio is going to yell at you. Now I can take that sCode value and do with it what I will. Just like the StreamWriter class, we can accomplish a big task in a few lines of code, leaving more time to goof off looking for iPhone apps.
Tags: fileio, streamreaderThis one is pretty self explanatory. You have some content you’ve gathered from a database, webservice, other means and you want to write that out to a file. We are going to call on the StreamWriter class for help. First things first, reference the System.IO class so you have all the libraries to make this work. Next, we define what the file is going to be called and where it is going to be written to. When I define the StreamWriter, I’m passing in three values 1) the file path, 2) whether I want to append the content to the existing file (true) or overwrite it (false), 3) and what form of encoding I’ll be using (UTF8 in the instance). Next, we go through and write each line out and flush it into the file. Five lines of code to take care of this indispensable function.
Sometimes you are parsing urls or other files and would like to be able to do something with that text. All lower case and boring isn’t going to excite many of your users. So in looking to capitalize the first letter of each word in a string we have to look beyond the bounds of the String class. The answer is in the globalization namespace. There is a method TextInfo.ToTitleCase that does just that.
That puny text becomes “Ajax The Definitive Guide.” The folks at O’Reilly would be happy that I properly emphasized their book’s title.There are several different ways at getting at this, but your simplist is to evaluate the number via the modulus operator (%). The modulus operator calculates the remainder when the first number is divided by the second. If its even, there won’t be a remainder and if its odd — you get the routine. How is this helpful? Say we are dynamically writing out rows in a datagrid and we need to tag them with alternating colors. This makes for an easy solution.
Tags: csharp even number, csharp odd number, modulus
