问表格数据的G-mail样式表单提交

EN

// Client side html
<table>
<form>
<tr><td><input type="checkbox" name="id" value="1"/></td><td>Row 1</td></tr>
<tr><td><input type="checkbox" name="id" value="2"/></td><td>Row 2</td></tr>
<tr><td><input type="checkbox" name="id" value="3"/></td><td>Row 3</td></tr>
<tr><td><input type="checkbox" name="id" value="4"/></td><td>Row 4</td></tr>
</form>
</table>

// Server side CGI, using pseudo-code
String[] ids = request.getArrayOfParametersNamed("id");
if(!empty(ids)) {
 for(id in ids) {
   DatabaseControllerModelThingWhatever.deleteById(id);
 }

 // Actually if SQL based you should use a batch statement instead of 
 // one-at-a-time deletes like above
}

// Ok the rows are deleted, either print out the page, or better yet,
// send a redirect so that a user-refresh does not try and re-delete 
// already deleted stuff and also give the user a wierd "resubmit form" warning
// Done

 // Client side HTML is same as before, only this time there is a DELETE button with
 // an onclick handler. Also, add a "class" or "id" to each "tr" so we can find it 
 // in the HTML table

 // Pseudo-javascript because I am lazy
 function onDeleteButtonClick() {

  // Get our ids
  var idElements = document.getElementsById("id");

  // Submit an async AJAX request (e.g. use Jquery and send ids as URL params)
  ajaxedDeleteSubmission(idElements);

  // Delete all the rows that should not be there
  for(i = 0; i < tablex.rows.length; i++) {
   // Grab the value of the "id" attribute of each table row (<tr id="?">...</tr>)
   id = tablex.rows[id].id;
   if(id in ids) {
    // Remove the row, forget how because now I just use Jquery.
    tablex.deleteRow(i);
   }
  }
 }