使用href onclick更新div而不重新加载页面?

时间:2015-12-15 06:24:00

标签: javascript php jquery html

我使用这个现有问题来帮助我:HTML - Change\Update page contents without refreshing\reloading the page

template-comparison.php文件从header.php代码中获取代码,但实际的"获取代码"没有显示。否则,模板页面将没有标题。 templatecode.php文件是用于获取和显示数据库数据的代码。

我的代码:

模板comparison.php

    <a href="#" onClick="prescand('1')" >link text</a>
    <a href="#" onClick="prescand('2')" >link text 2</a>
    <div id='myStyle'>
    </div>

templatecode.php

    <?php
    $servername = "localhost";
    $username = "hidden for security purposes";
    $password = "hidden for security purposes";
    $dbname = "hidden for security purposes";

    // Create connection
    $conn = new mysqli($servername, $username, $password, $dbname);
    // Check connection
    if ($conn->connect_error) {
        die("Connection failed: " . $conn->connect_error);
    } 

      $ID = $_GET['ID'];
      $results = mysql_query("SELECT * FROM PresidentialCandidate WHERE  ID='$ID'");   
      if( mysql_num_rows($results) > 0 )
      {
       $row = mysql_fetch_array( $results );
       echo $row['ID'];
      }
    ?>

的header.php

   <script type="text/javascript">
    function prescand(ID) {
      $('#myStyle').load('templatecode.php?id=' + ID);
    }
    </script>

会发生什么:

我点击链接。什么都没发生。它就像一个锚点,将我推到页面顶部。

有什么想法吗?我想要的是点击链接的数据的 ALL (例如:ID 1 ...链接文本)将显示在div中。如果我单击ID 2(链接文本2),则会显示该ID的数据。

4 个答案:

答案 0 :(得分:2)

我在下面有一个更长的答案,但你可以做的一件事就是阻止它像锚标签一样只是调用event.preventDefault();在你的函数之前的onclick():

<强>模板comparison.php

<a href="#" onClick="event.preventDefault();prescand('1');" >link text</a>
<a href="#" onClick="event.preventDefault();prescand('2')" >link text 2</a>
<div id="myStyle">
</div>

像这样使用AJAX:

<强>模板comparison.php

<a href="#" class="query-link" data-id="1">link text</a>
<a href="#" class="query-link" data-id="2">link text 2</a>
<div id="myStyle">
</div>

header.php

jQuery(document).ready(function(){
    jQuery('a.query-link').on('click', function(e){    
        //Prevent the link from working as an anchor tag
        e.preventDefault();

        //Make AJAX call to the PHP file/database query
        jQuery.ajax({
            url:'{PATH TO FILE}/templatecode.php',
            type:'POST',
            data:{id:jQuery(this).data('id')},
            success:function(data){
                jQuery('#myStyle').append(data);
            }
        });
    });
});

<强> templatecode.php

<?php
$servername = "localhost";
$username = "hidden for security purposes";
$password = "hidden for security purposes";
$dbname = "hidden for security purposes";

// Create connection
$mysqli = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
} 

  $ID = $_POST['ID'];
  $results = $mysqli->query("SELECT * FROM PresidentialCandidate WHERE  ID='$ID'");   
  if( $results->num_rows > 0 )
  {
   $row = mysqli_fetch_array($results,MYSQLI_ASSOC);

    //Instead of just echoing out the ID, you need to build the result/data that you want in the div right here. The success function of the AJAX call will append whatever you echo out here
    echo $row['ID'];
  }
?>

BTW,我更新了你的PHP代码,正确使用MySQLI,而不是将MySQL与MySQLi混合。

在看到您的网站(WordPress)之后,您不会想直接在header.php中加载它。其中一个问题是jQuery是在这个脚本之后加载的,因此它在加载时没有使用jQuery变量。您可以尝试将其放在footer.php文件中,但“正确”的方法是将其放在外部脚本中,然后在functions.php文件中使用wp_enqueue_script加载它。

答案 1 :(得分:1)

$results = mysql_query("SELECT * FROM PresidentialCandidate WHERE  ID='$ID'");   
if( mysql_num_rows($results) > 0 )
{
   $row = mysql_fetch_array( $results );
   echo $row['ID'];
}

替换为:

$sql = "SELECT * FROM PresidentialCandidate WHERE  ID='$ID'";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
  $row = $result->fetch_assoc();
  echo $row['ID'];
}

请不要混用mysql_*&amp; mysqli_*函数。

答案 2 :(得分:1)

只需从锚链接中删除href,它就会调用该函数,不会重定向到#

<a onClick="prescand('1')" >link text</a>

答案 3 :(得分:0)

如果您使用的是jQuery,则可以避免使用DOM <div class="contenedor canales"> <div class="thumb"> <a href="Accion.html"> <img title="Accion" src="img/thumbs/megamovieshd.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Accion" href="Accion.html">Accion</a> </h4> </div> <div class="thumb"> <a href="Bob-Esponja.html"> <img title="Bob Esponja" src="img/thumbs/mega_bobesponja.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Bob Esponja" href="Bob-Esponja.html">Bob Esponja</a> </h4> </div> <div class="thumb"> <a href="Caballeros-Del-Zodiaco.html"> <img title="Caballeros Del Zodiaco" src="img/thumbs/mega_bot.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Caballeros Del Zodiaco" href="Caballeros-Del-Zodiaco.html">Caballeros Del Zodiaco</a> </h4> </div> <div class="thumb"> <a href="Disney-Pixar.html"> <img title="Disney &amp; Pixar" src="img/thumbs/mega_kids.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Disney &amp; Pixar" href="Disney-Pixar.html">Disney &amp; Pixar</a> </h4> </div> <div class="thumb"> <a href="Dragon-Ball-Z-GT.html"> <img title="Dragon Ball Z &amp; GT" src="img/thumbs/mega_animes.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Dragon Ball Z &amp; GT" href="Dragon-Ball-Z-GT.html">Dragon Ball Z &amp; GT</a> </h4> </div> <div class="thumb"> <a href="Drama-y-Romance.html"> <img title="Drama Y Romance" src="img/thumbs/mega_movieshd.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Drama &amp; Romance" href="Drama-y-Romance.html">Drama &amp; Romance</a> </h4> </div> <div class="thumb"> <a href="El-Chavo-Del-8.html"> <img title="El Chavo Del 8" src="img/thumbs/mega_chavo.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="El Chavo Del 8" href="El-Chavo-Del-8.html">El Chavo Del 8</a> </h4> </div> <div class="thumb"> <a href="Familia-Peluche.html"> <img title="Familia Peluche" src="img/thumbs/mega_familia.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Familia Peluche" href="Familia-Peluche.html">Familia Peluche</a> </h4> </div> <div class="thumb"> <a href="Los-Simpson.html"> <img title="Simpson" src="img/thumbs/mega_simpson.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Simpson" href="Los-Simpson.html">Los Simpson</a> </h4> </div> <div class="thumb"> <a href="Malcolm.html"> <img title="Malcolm" src="img/thumbs/megamalcolm.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Malcolm" href="Malcolm.html">Malcolm</a> </h4> </div> <div class="thumb"> <a href="Pokemon.html"> <img title="Pokemon" src="img/thumbs/mega_animeshd.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Pokemon" href="Pokemon.html">Pokemon</a> </h4> </div> <div class="thumb"> <a href="SouthPark.html"> <img title="SouthPark" src="img/thumbs/mega_revolucionhd.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="SouthPark" href="SouthPark.html">SouthPark</a> </h4> </div> <div class="thumb"> <a href="Terror.html"> <img title="Terror" src="img/thumbs/mega_extremo.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Terror" href="Terror.html">Terror</a> </h4> </div> <div class="thumb"> <a href="Vecinos.html"> <img title="Vecinos" src="img/thumbs/mega_vecinos.jpg" alt=""/> </a> <h4 class="txt-oculto"> <a title="Vecinos" href="Vecinos.html">Vecinos</a> </h4> </div> </div> 触发器并使用jQuery事件。此外,当你的锚点中有一个#{1}}标签时,它会在点击时将标签放在URL中,因为它假定它是一个元素ID。您可以将其更改为如下所示,或者甚至省略它:

onClick

现在您可以使用jQuery绑定事件:

href

您也可以使用<a href="javascript:;" class="foo" data-target="1" >link text</a> jQuery选择器,但通常您希望更具体一些,并通过将它们与某个类组合在一起来定位某些锚点。

加载功能正常。

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