title: How to retrieve the particular row of detailsview into textbox on page load event if details view defaultmode is readonly
body: <p>How to retrieve the particular row of detailsview into textbox on page load event if details view defaultmode  is readonly</p>
  
  <p><img src="https://i.stack.imgur.com/ygMAj.png" alt="alt text"></p>
  
  <p>i want to retrieve the email id from detailsview email row in textbox1 on page load event ?</p>