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T
thnguyen-AohJo6
Known Participant
April 7, 2009
Question

Remembering checkbox

  • April 7, 2009
  • 2 replies
  • 2398 views

<a href="index.cfm?goto=A">A</a> |

<a href="index.cfm?goto=B">B</a> |

<a href="index.cfm?goto=C">C</a> |

<a href="index.cfm?goto=D">D</a> |

<a href="index.cfm?goto=E">E</a> |

I have a top navigation that will display a certain letter.  There are checkbox under each letter.  I am using session variable to remember the checkbox.

<input name="general_1" type="checkbox" value="1" />
<input name="general_2" type="checkbox" value ="2" />
<input name="general_3" type="checkbox" value="3" />

What is the best way for session variable to remember if the checkbox is checked or not when user click on different letter and go to different view?

Thanks

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2 replies

T
thnguyen-AohJo6Author
Known Participant
April 8, 2009

thanks again...it still not carrying and remember checkbox checked or not...I have to find another way, I guess...It shouldn't be that hard but my brain is dead on this problem.

J
john85
Inspiring
April 8, 2009

Maybe I am thinking differently, but I tested the code and it has no problem remembering which checkbox is checked and which is not.

edited: It won't retain the data when the page is load/reload (but works via submitted).

This should work.

<cfif isDefined("FORM.filter_1")>

     <cfset filter = ListAppend(filter, 1, ",")/>

     <cfset SESSION.filter_1 = "ON"/>

<cfelseif isDefined("FORM.formSubmitted")>

     <cfset SESSION.filter_1 = ""/>

</cfif>

....

<form name="form1" ....>

     <input name="formSubmitted" type="hidden" value="1"/>

     <input name="filter_1" .../>

     ...

</form>

T
thnguyen-AohJo6Author
Known Participant
April 9, 2009

thanks for your help.  I eventually with a suggested from someone using a form with javascript to pass variables over and to remember checkbox checked. See the code below.  it works for what I need.  Thanks again for your help and suggestions.  I appreciate it!!

<cfparam name="filter" default="" />
<cfparam name="getLetter" default ="" />
<script>
function sub(letter)
     { document.getElementById("getLetter").value= letter;
     document.name.submit();
     }
</script>
<form name="name" id="name" action="#cgi.script_name#" method="post">
     <a href="javascript:sub('A');">A</a> | <a href="javascript:sub('B');">B</a>
     <input type="checkbox" name="general_1" value="1" <cfif isdefined("form.general_1") OR listfind(filter, 1) EQ 1>checked</cfif> onClick="name.submit();" />
     <input type="checkbox" name="general_2" value="2" <cfif isdefined("form.general_2") OR listfind(filter, 2) EQ 2>checked</cfif> onClick="name.submit();" />
     <input type="hidden" id="getLetter" name="getLetter" value="getLetter" />
</form
J
john85
Inspiring
April 7, 2009

Why not cookie?

After a few minutes reading the sample below,security wise is bad. Itwould allow "user" to set/change other session variables which is bad.

Do you want to set the session when the checkbox is clicked? If so, I think you need to detect the onclick event on the checkbox and use ajax to set the session key.

<script language="javascript" type="text/javascript">
     function setSession(objCheck){
          var xmlObject = null;

          try {
              xmlObject = new XMLHttpRequest();
          } catch(e){
               try {
                    xmlObject = ActiveXObject("Msxml12.XMLHTTP");
               } catch (e2){
                    try {
                         xmlObject = new ActiveXObject("Microsoft.XMLHTTP");
                    } catch (e3) {xmlObject = null;}
               }
          }

          if (xmlObject != null) {
             xmlObjec.open("post", "somePage.cfm?name=" + objCheck.name + "&isChecked=" + objCheck.checked, true);
             //and so forth
             xmlObject.send(null);
          }
     }
</script>

<input name="general_1" type="checkbox" value="1" onclick="setSession(this)" <cfif isDefined("SESSION.general_1") AND UCase(SESSION.general_1) EQ "ON">checked</cfif>/>

somePage.cfm..

<cfif isDefined("URL.name") AND isDefined("URL.isChecked")>

   <cfset temp = StructInsert(SESSION, URL.name, "OFF"/>

   <cfif UCase(URL.isChecked) EQ "TRUE">

           <cfset temp = StructInsert(SESSION, URL.name, "ON"/>

   </cfif>

</cfif>

T
thnguyen-AohJo6Author
Known Participant
April 7, 2009

I am not good with ajax, unfortunately.  Basicially, the checkbox is used to filter the results from database.  So I want to use session var to remember which checkbox is checked.  If user wants to view 'A' with checkbox 1 checked, then A will be filtered 1 instead of displaying everything related to 'A'.  And every letter view with be filtered 1 until user uncheck that checkbox then will displaying everything without the filter.  The code below is basically what i want to do in 1 cfm page.  A session var or something that would remember the checkbox checked and the variable to a different letter and filter in the database.

<cfparam name="filter" default="" />
<cfif isdefined("form.filter_1")>
     <cfset filter = filter &'1,' />
</cfif>
<cfif isdefined("form.filter_2")>
     <cfset filter = filter &'2,' />
</cfif>
<cfif isdefined("form.filter_3")>
     <cfset filter = filter &'3,' />
</cfif>
<a href="index.cfm?goto=A">A</a> | <a href="index.cfm?goto=B">B</a> | <a href="index.cfm?goto=C">C</a>
<form name="form1" action="<cfoutput>#cgi.SCRIPT_NAME#</cfoutput>" method="post">
     <input name="filter_1" type="checkbox" value="1" onClick="form1.submit();" <cfif isdefined(filter_1) OR listfind(filter, 1) EQ 1>checked</cfif> />
     <input name="filter_2" type="checkbox" value="2" onClick="form1.submit();" <cfif isdefined(filter_2) OR listfind(filter, 2) EQ 2>checked</cfif> />
     <input name="filter_3" type="checkbox" value="3" onClick="form1.submit();" <cfif isdefined(filter_3) OR listfined(filter,3) EQ 3>checked</cfif> />
</form
<cfquery name="get_data" datasource="ds">
     SELECT * FROM table
     WHERE rc IN (#filter#)
</cfquery>
<cfoutput query="get_data">
     #data#
</cfoutput>
J
john85
Inspiring
April 8, 2009
<cfparam name="filter" default="" />

<cfif isdefined("form.filter_1")>
     <cfset filter = ListAppend(filter, 1, ",")/>
     <cfset SESSION.fitler_1 = "ON"/>
<cfelse>
     <cfset SESSION.fitler_1 = ""/>
</cfif>

<cfif isdefined("form.filter_2")> 
     <cfset filter = ListAppend(filter, 2, ",")/>
     <cfset SESSION.fitler_2 = "ON"/>
<cfelse>
     <cfset SESSION.fitler_2 = ""/>
</cfif>
<cfif isdefined("form.filter_3")>     
     <cfset filter = ListAppend(filter, 3, ",")/>
     <cfset SESSION.fitler_3 = "ON"/>
<cfelse>
     <cfset SESSION.fitler_3 = ""/>
</cfif>


<a href="index.cfm?goto=A">A</a> | <a href="index.cfm?goto=B">B</a> | <a href="index.cfm?goto=C">C</a>




<form name="form1" action="<cfoutput>#cgi.SCRIPT_NAME#</cfoutput>" method="post">
     <input name="filter_1" type="checkbox" value="1" onClick="form1.submit();" <cfif (isdefined(SESSION.filter_1) AND UCase(SESSION.filter_1) EQ "ON") OR listfind(filter, 1) GT 0>checked</cfif> />
     <input name="filter_2" type="checkbox" value="2" onClick="form1.submit();" <cfif (isdefined(SESSION.filter_2) AND UCase(SESSION.filter_2) EQ "ON") OR listfind(filter, 2) GT 0>checked</cfif> />
     <input name="filter_3" type="checkbox" value="3" onClick="form1.submit();" <cfif (isdefined(SESSION.filter_3) AND UCase(SESSION.filter_3) EQ "ON") OR listfind(filter, 3) GT 0>checked</cfif> />
</form

<cfquery name="get_data" datasource="ds">
     SELECT * FROM table
     WHERE rc IN (#filter#)
</cfquery>

<cfoutput query="get_data">
     #data#
</cfoutput>
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