how to bind data to Drop Down List in asp.net mvc3

Question

Hi to Everyone

   I searched a lot for the following but I didn't find the answer anywhere
  
   I want to display data in  first drop down list from database,when I select item from first drop down list again I want to display list  of items from database into second drop down list in asp.net mvc3 app.

  If anybody knows the answer please help me