So now you have a nice report written to an HTML file.  How do you open it for the user to view it using IE?  You could try this:

System.Diagnostics.Process.Start("iexplore.exe","MyReport.htm");

But this hasn't always worked for me.  Here is a sure fire way to put it all together.

Add a project reference to the COM library, Microsoft Internet Controls.  Add these two using statements:

using SHDocVw;
using System.Runtime.InteropServices;

Where you need to open the browser, add the following code:

explorer = new InternetExplorer(); 
if (explorer != null) 
{ 
     explorer.Visible = true; 
     object x = null;
     explorer.Navigate(@"MyReport.htm", ref x, ref x, ref x, ref x); 
}

Thanks to a good friend of mine, Micheal Beall of Overdrive Technologies, for helping me with this.

***Originally posted on DotNetJunkies on February 16, 2005