Jan 31, 2007If you want to test your position in Google for a certain search term, you can do
so by using the Google website. By position I don't mean Page Rank, but the actual
place in the search results. You can also use C# to find the position like the method
shows below.
You can use the code to build a cool application that lists the positions of your
website based on all your important search terms. You can change it to run asynchronously
for better performance when checkin...
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Jan 30, 2007A couple of months ago one of my readers asked me to build a stock quote class that
would automatically update the quote. I forgot about it, but then I found the e-mail
and decided to give it a go. I started looking for some free services that could provide
the data in XML format or something similar that can be easy parsed. Apparently that
does not exist. All the stock sites charge you for that information and I want something
free, so that was not the way to go.
The...
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Jan 30, 2007In many different scenarios we need to check if a string can be converted into an
integer e.g. This could be when we work with query strings and need to check
if they match a certain data type. In VB.NET you can use the IsNumeric and IsDate
functions, but that's about it. You are left to your own data type checking logic
the rest of the time. It would be cool if we could have a method that could check
all data types that is represented by strings such as integers, guids,...
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Jan 27, 2007In many cases we write our ASP.NET logic around query strings in order to show the
right product page or what not. The first thing we do is to check if the query string
exists in the first place before we start using it. It could look like this:
if (Request.QueryString["id"] != null)
{
// Do something with the querystring
}
The only problem with the above check to see if the query string is null, is that
...
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Jan 25, 2007Today, I was playing around with HTTP request headers and for some reason started thinking about how limited information they provide about the requesting browser. All they really provide is the user agent string which provide very little information about the visitors platform, and that’s about it. If they also provided screen resolution and available browser window real estate, it would start being useful for other scenarios than we are used to.
Then I started thinking about a way to provi...
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Jan 25, 2007In the good old .NET 1.x days where Generics wasn’t born yet, the ArrayList was
the class to use for just about any type of collection. It was much easier to use
compared to an array of objects and it did the job very well. It was kind of the do-it-all
solution for the lazy developer that just needed things to work the first time.
Along came the .NET Framework 2.0 which introduced Generics to the platform. Since
the first beta of Visual Studio “Whidbey” was released more ...
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Jan 25, 2007URL parameters or query strings are often used to carry information that can be used by hackers to do identity theft or other unpleasant things. Consider the URL example.com/?user=123&account=456 and then imaging what a hacker could do with it. Security or not, sometimes you just don’t want the visitors to see all the query strings for whatever reason.
In those cases it would be nice if we could encrypt the entire query string so it wouldn’t carry any readable information. The problem wi...
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Jan 23, 2007Whenever you use a Button or LinkButton it is because you want to be able to do a
postback when it is clicked. The same could be the case for CheckBox or DropDownList
etc. but then you need to set the AutoPostback property to true. It all works very
much the same way from a user’s point of view - click or select and the page performs
a postback.
However, in some cases you want to be able to do a postback from a custom JavaScript
function that emulates the click of an ...
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Jan 22, 2007Most websites include a meta-tag that tells the browser what content-type the document
is. It looks like this:
<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1" />> All ASP.NET web applications also adds the content-type to the HTTP headers of the
response by default and to avoid surprises you should make sure the header and meta-tag
inform the browser about the same content-type.
You can specify the content-type on individua...
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Jan 21, 2007During the years I’ve seen a lot of different ways of commenting code – some good
and some bad. My personal favourite way of commenting code is by using the XML comment
feature of C# and VB.NET, but the important part of commenting code is not how you
do it, but what you write in them.
Methods are the most challenging members to comment, because they perform an action
and can contain many lines of code compared to e.g. properties. Because of their relative
complexity ...
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