CI按钮提交表达查询数据库表达的action连接路径的问题

    	<form action="<?php echo site_url().'/getresult'?>" method="post">        		<input name="cname" placeholder="请输入考生姓名" class="form-control" type="text"><br>		<input name="ccert" placeholder="请输入准考证号" class="form-control" type="text"><br>		<input value="提交" class="btn btn-info col-xs-12" type="submit">	</form>

class  Getdb_model extends CI_Model {		public function getresult()	{    	    /* 这里组合sql语句*/		/*$cname = $this->input->post('cname');		$cert = $this->input->post('ccert');  		print_r($cname);		print_r($cert);		*/	    $cname = $this->input->post('cname');		$cert = $this->input->post('ccert'); 		$cname_item = 'username';		$data = $this->db->where(array('username'=>$cname))->get('exam_resu')->result_array();				return $data;    }}

<?phpdefined('BASEPATH') OR exit('No direct script access allowed');class Getresult extends  CI_Controller{			public function index()	{	 	     $this->load->model('getdb_model','get');	 $data['cj']=$this->get->getresult();	 /*  下面再调用一个视图*/	 	 $this->load->view('result',$data);		}	}	

<table width="760" border="1">      <tr>        <td>学生姓名</td>        <td>准考证号</td>        <td>单选题</td>        <td>多选题</td>        <td>填空题</td>        <td>作图题</td>        <td>简答题</td>        <td>计算题</td>        <td>试验题目</td>        <td>总分</td>      </tr>      <tr>      <?php foreach($cj as $v): ?>        <td><?php echo $v['username'] ?></td>        <td><?php echo $v['examnum'] ?></td>        <td><?php echo $v['item_1'] ?></td>        <td><?php echo $v['item_2'] ?></td>        <td><?php echo $v['item_3'] ?></td>        <td><?php echo $v['item_4'] ?></td>        <td><?php echo $v['item_5'] ?></td>        <td><?php echo $v['item_6'] ?></td>        <td><?php echo $v['item_7'] ?></td>        <td><?php echo $v['total'] ?></td>        <?php endforeach ?>      </tr></table>