Print, Save as PDF and Excel in C#

I'd create a simple RDLC (local report) with a grid bound to a data set (the same you used for your GridView)
Then you can export it to PDF & Excel through code http://forums.asp.net/t/1556522.aspx?RDLC+Export+directly+to+Excel+or+PDF+from+codebehind[^] and you can get it printed as described here or you could embed some javascript print function into the exported PDF file using PDFSharp (http://stackoverflow.com/a/17732531[^]) to get it printed directly when the file is opened.

To create PDF, you can use the .NET port of iText; this port is called iTextSharp:
http://en.wikipedia.org/wiki/IText[^],
http://itextpdf.com/[^],
http://sourceforge.net/projects/itextsharp/[^].

I provided links to iText, too, because nearly all documentation you need to work with iTextSharp is there, provided as Java documentation.

To export as Excel document, you can use Open XML SDK:
http://www.microsoft.com/en-us/download/details.aspx?id=30425[^].

This way, you can support new XML-based Office formats (such as .DOCX, .XLSX), ECMA-376 standard:
http://en.wikipedia.org/wiki/Microsoft_Office_XML_formats[^],
http://en.wikipedia.org/wiki/Office_Open_XML[^].

This way, you can work without Office installed. Also, the documents are supported by 3rd-party software. Please see my past answers:
Convert Office-Documents to PDF without interop[^],
Need a rather unique WPF text editor control[^],
Hi how can i display word file in windows application using c#.net[^],
Read a word file without using Interop.word dll...Do not want to install word in IIS..[^].

This is another option: http://npoi.codeplex.com/[^].

See also this CodeProject article: Creating basic Excel workbook with Open XML[^].

—SA