validation for checkboxes

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XML

<tr>
                        <td height="12" align="left" class="cont">
                            <asp:CheckBox ID="chkacsoutreach" runat="server" />Acs Outreach
                        </td>

                    </tr>
                    <tr>
                        <td height="12" align="left" class="cont">
                           <asp:CheckBox ID="chkaceportal" runat="server" /> Ace Portal
                        </td>

                    </tr>

I took some checkboxes in the following way.I should get a message if atleast 1 checkbox is not checked and the values should not be entered into the database.This is the validation i needed.I have written the javascript code as below:but instead of 'controls[]' there should be a groupname which combines all the checkboxes.Iam not understanding what name to give here.Can any one please help me out

XML

<script type="text/javascript" language="javascript">
                      function validate() {
                          var chks = document.getElementsByName('controls[]');
                          var hasChecked = false;
                          for (var i = 0; i < chks.length; i++) {
                              if (chks[i].checked) {
                                  hasChecked = true;
                                  break;
                              }
                          }
                          if (hasChecked == false) {
                              alert("Please select at least one.");
                              return false;
                          }
                          return true;
                      }
                          </script>

Posted 13-Sep-10 0:52am

srujanac#

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raju melveetilpurayil · Answer 1 · 2010-09-13T12:43:00

script change a little.

<script src="jquery-1.4.1.js" type="text/javascript" language="javascript"></script>

XML

<script type="text/javascript" language="javascript">
                      function validate() {
                          var hasChecked = false;
                          var chkBox = $(':checkbox');
                          for (i = 0; i < chkBox.length; i++) {
                              if (chkBox[i].checked) {
                                  hasChecked = true;
                                  break;
                              }
                          }
                          if (!hasChecked) {
                              alert("Please select at least one.");
                              return false;
                          }
                          return true;
                      }
                          </script>

[Edit]
also check this link
:checked Selector[^]
[/Edit]

Sandeep Mewara · Answer 2 · 2010-09-13T07:04:00

Solution 1

Why not put a Validator control and put all the checkboxes into one group assigned to that validator?

For now, if you want changes in JS, then have a look at this thread[^] and this [^]thread.

Posted 13-Sep-10 7:04am

Sandeep Mewara

Bryian Tan · Answer 3 · 2010-09-13T15:08:00

hello,

You can modify the JavaScript to something like

XML

<script type="text/javascript" language="javascript">
                     function validate() {
                         var chks = document.getElementsByTagName('input');
                         var hasChecked = false;
                         for (var i = 0; i < chks.length; i++) {
                             if (chks[i].type.toLowerCase() == "checkbox") {
                                 if (chks[i].checked) {
                                     hasChecked = true;
                                     break;
                                 }
                             }
                         }
                         if (hasChecked == false) {
                             alert("Please select at least one.");
                             return false;
                         }
                         return true;
                     }
                         </script>

source: http://stackoverflow.com/questions/838677/how-do-i-make-sure-that-at-least-one-checkbox-is-[^]

validation for checkboxes

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