title: select all rows in gridview without paging
body: <p>I have a gridview with 100 Rows with paging turned on (showing 20 rows at a time).</p>
  
  <p>There is a checkbox in each row to select that record.</p>
  
  <p>In the header there is a "check all" checkbox</p>
  
  <p>When I check it will just select the 20 from the current page.</p>
  
  <p>Is there a way to have it select all 100 rows with out resizing the size of the page (have it show all 100 rows).</p>
  
  <p>Thanks</p>