hi,
now, i can populate the combobox by fetchging the value from mysql.
however, now, i'd like to grab the value out and display it on another line.
says, i selected one of the value in the comboBox and then i'd like to grab the valule out,
compare it to the corresponding value in DB, and display it out now.
ex. i selected product called 'abc' , i then now would like my code to display the price of that product immediately on anotherline.
i think i need to use javascript with php to do this.
but i don't know how can i use javascript in this case (i kinda newbie with javascript)
can any1 help me on this? any example 'd be really appreciate.
Thx a lot
Tom
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from
<div id="ValueFromDB">
<!--
Here you would put your mysql code to get the row from the database and dispaly it, you should check that the value from the form of the selected box is not empty so you don't get an error
-->
</div>
i think i should get the value( tat just been selected) out from that part, however, i not sure how to get that value out though.
Yes that is the part you have to get the value.
You have to get the value from the form ( I don't really know php but isnt it $_Get[ "NameOfFormControl" ] where name of form control in this case would be cmbMySelect )
There is no way to query the database directly from the javascript, you have to send the data back to the server.
please post your generated source code ( open the page in your browser then view the source, copy it and paste it here )
you also may want to change this
onchange="if( this.selectedIndex != 0 ) this.form.submit( );">
to thsi
onchange="if( ( this.options ) && this.selectedIndex != 0 ) this.form.submit( );">
you can do this
<html>
<script>
function SubmitForm( cmbTargetBox )
{
// Submit?
if( cmbTargetBox.options.lengt
{
var frmTargetForm = cmbTargetBox.form;
frmTargetForm.SubmittedFro
frmTargetForm.submit( );
}
}
</script>
<body>
<form name="frmMain">
<!-- This if statement just says that if the first option is chosen ( the blank option ) don't submit the form
if you dont have a blank option take out the if statement -->
<select name="cmbMySelect" onchange="SubmitForm( this );">
<!-- These options here are just for show, you would put your mysql generated options here -->
<option value=""></option>
<option value="abc">abc</option>
</select><br />
<div id="ValueFromDB">
<!--
Here you would put your mysql code to get the row from the database and dispaly it, you should check that the value from the form of the selected box is not empty so you don't get an error
-->
</div>
<input type="hidden" name="SubmittedFromComboBo
</form>
</body>
</html>
i put a hidden form field in called SubmittedFromComboBox, if that value is true you know it was the combo box that did it
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Answer for Membership
by: justinbilligPosted on 2005-08-04 at 04:27:50ID: 14596926
Your going to have to submit a form to read the database, Something Like this
<html>
<body>
<form name="frmMain">
<!-- This if statement just says that if the first option is chosen ( the blank option ) don't submit the form
if you dont have a blank option take out the if statement -->
<select name="cmbMySelect" onchange="if( this.selectedIndex != 0 ) this.form.submit( );">
<!-- These options here are just for show, you would put your mysql generated options here -->
<option value=""></option>
<option value="abc">abc</option>
</select><br />
<div id="ValueFromDB">
<!--
Here you would put your mysql code to get the row from the database and dispaly it, you should check that the value from the form of the selected box is not empty so you don't get an error
-->
</div>
</form>
</body>
</html>