My C# Corner

This is a project I worked on last year. It is an algorithm to to show the best way to cut small pieces of paper out of a larger piece. I wrote the algorithm in C# then used System.Drawing.Imaging to to demo its output on an ASP.NET page.

The project is also available as an iPad/iPhone app, named Smart Cutter.

When you bind a GridView to an ObjectSource in ASP.NET, sometimes, you don't want to display all of the columns returned from the ObjectSource DataTable, but if you use a GridView and let it autmatically generate the columns, it becomes not a striaght forward deal to hide the individual selected columns. Here is a way to do that:

Simply catch the RowDataBound event on the GridView and if you know the index of the column to hide, just use it as follows:

We all know in ASP.NET, to get the absolute path from the relative path, you can prefix your relative path with the Tilde character as follows:

MyHyperLink.NavigateUrl = "~/Catalog/ASP/Products";

Do you like the social links bar on top of this article? Do you hate it? In today's internet blog, you almost never miss seeing a "Digg It", a "Kick it", a "Ridd It" a Furl it, burl it...or squirrel it... link or icon at the end of each article you read in someone's blog. Well, regardless of the opinions people might have about this phenomenon, if you are an ASP.NET programmer like me, your concern would probably be over how to construct the "social-butterfly" user control, rather than

In my previous article, How to track visitors to your site in ASP.NET & C#, I discussed how you can log the Host Info for each page visitor on your site using Dns.GetHostByAddress function.

One thing I did not stress out was the need to catch all exceptions from that method call. There are cases when this call:

Once you have published a site in ASP.NET, you'd like to know who are your visitors. One way is to check your event log on the host server. Another option is to write your own code. You'd basically like to log the IP address, and DNS name for the visitor, and it would be nice to know which page they are visiting.

To log the ip address using ASP.NET, you can call:

Once you have published a site in ASP.NET, you'd like to know who are your visitors. One way is to check your event log on the host server. Another option is to write your own code. You'd basically like to log the IP address, and DNS name for the visitor, and it would be nice to know which page they are visiting.

To log the ip address using ASP.NET, you can call:

Request.ServerVariables["HTTP_X_FORWARDED_FOR"]