AJAX请求向用户显示内容,但不在页面源上显示

时间:2018-10-21 17:43:23

标签: javascript php html ajax

在文档正文中,我们将其称为“ form.php”:

head上,我们有一个JavaScript代码:

<script>
  function showUser(str) {
    if (str == "") {
      document.getElementById("txtHint").innerHTML = "";
      return;
    } else {
      if (window.XMLHttpRequest) {
        // code for IE7+, Firefox, Chrome, Opera, Safari
        xmlhttp = new XMLHttpRequest();
      } else {
        // code for IE6, IE5
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
      }
      xmlhttp.onreadystatechange = function() {
        if (this.readyState == 4 && this.status == 200) {
          document.getElementById("txtHint").innerHTML = this.responseText;
        }
      };
      xmlhttp.open("GET", "getchauffeur.php?q=" + str, true);
      xmlhttp.send();
    }
  }
</script>

我们查询数据库并填充一个下拉列表。我们使用(showUser)来切换内容:

<div>
  <? 

  $result = $mysqli -> query("select id, nomchauffeur from  chauffeurs");
  echo "<select name='id'  onchange='showUser(this.value)'>";

  while ($row = $result -> fetch_assoc()) {

      unset($id, $name);
      $id = $row['id'];
      $name = $row['nomchauffeur'];
      echo '<option value="'.$id.
      '">'.$name.
      '</option>';
  }

  ?>

在这里,我们仍在体内。我们将AJAX的内容放入div

  <div id="txtHint"><b>chauffeur info will be listed here...</b> </div>

</div>

以下是我们的脚本,该脚本使用AJAX请求的内容填充表单字段:

<script>
  var table = document.getElementById('table');
  for (var i = 1; i < table.rows.length; i++) {
    table.rows[i].onclick = function() {
      //rIndex = this.rowIndex;

      document.getElementById("nomchauffeur").value = this.cells[0].innerHTML;
      document.getElementById("prenomchauffeur").value = this.cells[1].innerHTML;
      document.getElementById("agechauffeur").value = this.cells[2].innerHTML;
      document.getElementById("cinchauffeur").value = this.cells[3].innerHTML;

    };
  }
</script>

现在这是我们的getchauffeur.php:

<?php

  $q = intval($_GET['q']);

  $con = mysqli_connect('localhost','root','','nouveau');
  if (!$con) {
    die('Could not connect: ' . mysqli_error($con));
  }

  mysqli_select_db($con,"ajax");
  $sql="SELECT * FROM chauffeurs WHERE id = '".$q."'";
  $result = mysqli_query($con,$sql);

  echo "<table>
  <tr>
    <th>nom</th>
    <th>prenom</th>
    <th>age</th>
    <th>adresse</th>

  </tr>";
  while($row = mysqli_fetch_array($result)) {
    echo "<tr>";
    echo "<td>" . $row['nomchauffeur'] . "</td>";
    echo "<td>" . $row['prenomchauffeur'] . "</td>";
    echo "<td>" . $row['agechauffeur'] . "</td>";
    echo "<td>" . $row['adressechauffeur'] . "</td>";

    echo "</tr>";
  }
  echo "</table>";
  mysqli_close($con);
?>

问题:如果表格位于同一页上,则一切正常。但是在这里,AJAX请求限制了我们将表放在其他php页面(chauffeur.php)中。 我们需要的是通过单击下拉Change操作显示的行来自动填充表单字段。似乎插入“ chauffeur.php”内部表中的行未打印在html DOM上。当我们单击页面视图源时,它仅显示:

<div id="txtHint"><b>chauffeur info will be listed here...</b> </div>

而不是以下字段的内容:

nomchauffeur  prenomchauffeur  agechauffeur adressechauffeur

我们如何获取行的内容并自动填写表格,它在哪里?

1 个答案:

答案 0 :(得分:0)

整个javascript AJAX应该在HTML div #txtHint之后。

if (this.readyState == 4 && this.status == 200) { document.getElementById("txtHint").innerHTML = this.responseText; } 您也可以只返回行而不返回整个表。在主页上,将表创建为id'txtHint',并在响应中插入该行。