具有JavaScript操作的列表框未发布值

Question

I have the following form:

<form name='progObj_form' method='POST' enctype='multipart/form-data' action='processpage.php'>
<select name='manageObj[]' id='objectives'  multiple="multiple">
<option value=0>there are no objectives for this program</option>
</select><br />
<a href='#nogo' onclick="delItem(objectives,0,'objEditBtn')" class='shiftOpt'>delete selected</a><br />
<input name='newObjective' type='text' id='newObjective'/>
<input name='addNew' type='button' onclick="AddItem(newObjective.value,6,'objectives','objEditBtn');" value='add objective'/>
<input name="passProgID" type="hidden" value="1" /><br />
<input name="objectiveEdit" id="objEditBtn" type="submit" value="save changes" disabled=disabled/>
</form>

that allows data (objectives in this case) to be added and deleted from a list box. That all works well but for some reason the updated listbox values aren't being passed to the process page.

I'm catching the data like so (simplified):

if (isset($_POST['objectiveEdit'])){
$progID=$_POST['passProgID'];
 for ($v=1;$v<count($_POST['manageObj']);$v++){
   $value=$_POST['manageObj'][$v];
   $sqlObj="INSERT INTO progObjective (progID,objective,objectiveOrder) VALUES ($progID,$value,$v)";
   $result = mssql_query($sqlObj,$linkProbation) or die('Query failed: '.$sqlObj);  
 }//end for ($a=0;$a<count($_POST['manageObj']);$a++)   
$objMsg=print_r($_POST['manageObj']).$sqlObj;       
}//end if (isset($_POST['objectiveEdit'])

For $objMsg , I get a response of 1 and the array doesn't print because ostensibly, it's empty which means that it also doesn't enter the for loop.

I can include the javascript as well but started with just this for simplicity since I'm probably just overlooking something obvious?!

Answer 1

Option elements are never sent to the server. Only the value of the selected option will be sent.

In your case, something like manageObj=x will be sent to the server, where x is the value of the option element that is selected by the user. It is possible that you misunderstand the [] when it's used in a name attribute.

You should try to find a different method if you want to send the objectives created by the user to the server. You could store the data in hidden input s for example.

Answer 2

So I finally figured it out! There's no array because there are no selections made! I updated the submit button to call a SELECT ALL function and now it's all good.

 <input name="objectiveEdit" id="objEditBtn" type="submit" value="save changes" onclick="selectAll('objectives',true)" />

Answer 3

name =' manageObj [] '-不应该是name =' manageObj '吗？