I'm using Drupal 7 with views 3.
I have used an exposed filter for a date field and I want to provide option to choose date from datepopup for date filter? How can I do this?
The Better Exposed Filters module integrates with the date type fields, including the date popup. You can use this module to easily add an exposed filter with the date popup.
There are some known issues with BEF's integration with the date module; from the module page:
You don't need BEF to get popup calendar with exposed view filters. You just need "Date pop up" and "date views" submodules.