>I quick google search turned this up.
>http://forums.asp.net/t/1186583.aspx/1

This got me in the neighborhood but I'm still having trouble changing the enabled property.

Here is what that site recommended:

protected void grdOpenItems_PreRender(object sender, EventArgs e)
{
   foreach (GridViewRow row in grdOpenItems.Rows)
   {
       if (row.RowType == DataControlRowType.DataRow)
       {
           HyperLink hl = (HyperLink)row.Cells[9].Controls[0]; // 9 is the hyperlink column index
           if (hl.Text = "Reserved")
           {
               hl.Enabled = false;
           }
           if (hl.Text = "Available")
           {
               hl.Enabled = true;
           }
       }
   }
}

This does not work because the Controls collection is empty. The following does not generate an error but it doesn't disable the link or the column, either:

    protected void grdOpenItems_PreRender(object sender, EventArgs e)
    {
        foreach (GridViewRow row in grdOpenItems.Rows)
        {
            if (row.RowType == DataControlRowType.DataRow)
            {
                string sCategory = row.Cells[9].Text;
                if (sCategory == "C" || sCategory == "E")
                {
                    row.Cells[9].Enabled = false;
                }
                else
                {
                    row.Cells[9].Enabled = true;
                }
            }
        }
    }

So close. . . Any suggestions as to what to try next?

Thanks for getting me this far.