如何使用codeigniter将复选框值写入数据库为1/0而不是/ 0

trying to save the checkbox 'checked status in my database. I am using codeigniter for this. I add the cehckbox form value to the array as follows: 'treated' => $this->input->post('treated'.$i),

I then write to database passing my array which contains the above input.

this is written to the database as 'on' and works with char/varchar. if however I change this to bit or tinyint(1) it fails with mssql error Conversion failed when converting the varchar value 'on' to data type tinyint.

How can I pass the checked checkbox value as 1 instead of on?

Thanks in advance.

update

 $i=1;
    while($i<=$this->input->post('orderlines'))
  {
$treatedVal=$this->input->post('treated'.$i)?1:0;

      //set the data for line insert start
        $data = array(
      'treated' => $treatedVal,    
        );

        $this->sales_model->order_lines_insert($data);  
  $i++;
  }

You should change it in the HTML itself.

<html>
    <input type="checkbox" name="check" value="1" />  <!--give it a value attribute the default is "on"-->
</html>

simply do this before creating data array

 $treatedVal=$this->input->post('treated'.$i)?1:0;
 // then add this variable value to your array
 'treated' => $treatedVal,

This is how I do it:

var myVal = ( $('#myCheckbox').is(':checked') ) ? 1 : 0;

alert('myVal is: ' +myVal); //alerts 1 if checked, 0 if not checked

jsFiddle Demo