title: How to use bootstrap to make ASP gridview be responsive
body: <p>I meet a problem about using bootstrap to create responsive GridView.
  I see an example in <a href="https://www.c-sharpcorner.com/UploadFile/47548d/responsive-grid-view-in-Asp-Net/" rel="nofollow noreferrer">https://www.c-sharpcorner.com/UploadFile/47548d/responsive-grid-view-in-Asp-Net/</a>?,
  but the main problem is if the column width is each different in gridview, 
  how to set its md,xs,sm,lg css class to meet gridview its original width style,
  Is there good way to make that?</p>