C# - Open File With Its Application?

Aug 27, 2010

want to ask how to open specific file (the file out of the server, i have a relative path to it stored in config file) with its application when click on specific link button or hyper link...like ::open .docx with word.or .pdf with acrobat reader i tried several methods but , i get different errors like "Cannot use a leading .. to exit above the top directory" this my code::

public void ProcessRequest(HttpContext context)
{
int newsId = int.Parse(context.Session["newsId"].ToString());

[code]...

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[Code]....

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[Code]....

Stack Trace:

[Code]....

[Win32Exception (0x80004005): No application is associated with the specified file for this operation]
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