查询时，保留输入的查询内容，（以及默认选中某个下拉列表

来源：互联网发布：游戏开发巨头复杂算法编辑：程序博客网时间：2024/04/29 23:35

思路：将输入的内容或选项提交给控制层，并把值赋给显示层，在显示时把默认value值输出、option默认选中。

1、控制层：

function searchinfo(){$name = $this->input->post('name');            $mobile =trim($this->input->post('mobile'));$workplace = trim($this->input->post('workplace'));$begindate = trim($this->input->post('begindate'));$comfrom =trim($this->input->post('comfrom'));$lifecity =trim($this->input->post('lifecity'));$data['name'] = $name;$data['mobile'] = $mobile;$data['workplace'] = $workplace;$data['begindate'] = $begindate;$data['comfrom'] = $comfrom;$data['lifecity'] = $lifecity;$this->load->model('student_model');$data['query'] = $this->student_model->search_student();$data['query2'] = $this->student_model->get_studentinfo();$data['query3'] = $this->student_model->get_lifecity();$data['query4'] = $this->student_model->get_comefrom();         if($data['query'] == NULL){$this->load->view('header');$this->load->view('student_search2',$data);$this->load->view('footer');}else{$this->load->view('header');$this->load->view('student_search',$data);$this->load->view('footer');}}

2、显示层

<?php $option ="<option value =''>-请选择-</option>";$select='';<span style="color:#FF0000;"> foreach ($query2 as $v){     if($v['begindate'] == $begindate){ $select="selected='selected'"; }      $option = $option."<option value =".$v['begindate']." ".$select.">".$v['begindate'].'</option>';      $select = '';  }</span>?>

3、另一实例

<span style="font-size:18px;">//得到符合队伍条件的团体比赛项目public function getteameventList($matchid,$intna,$intnv,$minage){//已报项目，默认为选中状态。//查询已报项目$teamid = $_SESSION['teamid'];$sql = "select *from teamform where teamID = '$teamid' ";$query = $this->db->query($sql);$rowdata = $query->row_array();if($rowdata!=null){$checkone = $rowdata["eventID"];}else{$checkone ="";}//进行循环判断已报项目是否与下拉选项中某个选项值一样。$sql = "select eventid,eventname from events where matchid = ".$matchid." and maxna >= ".$intna." and minna <= ".$intna." and maxnv >= ".$intnv." and minnv <= ".$intnv." and minage >=".$minage;//echo $sql;$query = $this->db->query($sql);$arrdata = $query->result_array();$stroption = "";$select = '';$i = 0;if($arrdata){<span style="color:#FF0000;">foreach($arrdata as $value){</span><span style="color:#FF0000;">if($arrdata[$i]["eventid"] == $checkone ){$select="selected='selected'"; }$stroption = $stroption."<option value=\"".$value['eventid']."\"".$select.">".$value['eventname']." </option>";$select = '';$i=$i+1;}</span>}return $stroption;}</span>

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