Question

Is it possible to populate a checkboxlist from the database values? If so, please suggest how to do this.

$query2 = "select * from Products where CategoryID = '$CategoryName' ";
 mysql_query($query2) or die(mysql_error());
 $array = array();

while($row = mysql_fetch_assoc($query2)){
$array[] = $row;}

foreach($array as $val)
 {
 if($val =='the checkbox value')

Answer 1

<form>
<input type="checkbox" name="vehicle" value="Bike" /> I have a bike<br />
<input type="checkbox" name="vehicle" value="Car" /> I have a car
</form>

These are the few steps you have to do.
1.Fetch the values from database.
2. Covert the values in array as they are stored as string by (,) separated.
3. Then

foreach($values as $val)
     {
          if($val =='Bike')
             {
                   $bikeflag = '1';
             }
            if($val =='Car')
             {
                   $carflag = '1';
             }

    }
<form>
<input type="checkbox" name="vehicle" value="Bike"  <?php if(isset($bikeflag ) =='1'){ ?>checked = checked <?php } ?>/> I have a bike<br />
<input type="checkbox" name="vehicle" value="Car"   <?php if(isset($carflag) =='1'){ ?>checked = checked <?php } ?>/> I have a car
</form>

Hopefully this will help you.