Detailed explanation of the usage code of how javascript traverses table data-JS Tutorial-php.cn

Detailed explanation of the usage code of how javascript traverses table data

伊谢尔伦

Release： 2017-07-22 10:10:08

Original

1354 people have browsed it

Introduces how to use js to obtain the content of a certain cell in a table. The table is composed of table, tr, td and other html tags. table represents a table, tr represents a row, and td represents a column in a row.

1. The general table structure is as follows

<table>
 <tr>
  <td>id</td>
  <td>name</td>
 </tr>
 <tr>
  <td>1</td>
  <td>fdipzone</td>
 </tr>
 <tr>
  <td>2</td>
  <td>wing</td>
 </tr>
</table>

Copy after login

2. Method of traversing all contents in the table

First, you need to add an id to the table, so that you can easily locate which table. For example,

<table id="mytable"></table>
获取表格行数

<script type="text/javascript">
/** 
 * 获取表格行数
 * @param Int id 表格id
 * @return Int
 */
function getTableRowsLength(id){
  var mytable = document.getElementById(id);
  return mytable.rows.length;
}
</script>

Copy after login

Get the number of rows and columns in a table

<script type="text/javascript">
/** 
 * 获取表格某一行列数
 * @param Int id  表格id
 * @param Int index 行数
 * @return Int
 */
function getTableRowCellsLength(id, index){
  var mytable = document.getElementById(id);
  if(index<mytable.rows.length){
    return mytable.rows[index].cells.length;
  }else{
    return 0;
  }
}
</script>

Copy after login

Traverse the table contents and save them to the array

<script type="text/javascript">
/** 
 * 遍历表格内容返回数组
 * @param Int  id 表格id
 * @return Array
 */
function getTableContent(id){
  var mytable = document.getElementById(id);
  var data = [];
  for(var i=0,rows=mytable.rows.length; i<rows; i++){
    for(var j=0,cells=mytable.rows[i].cells.length; j<cells; j++){
      if(!data[i]){
        data[i] = new Array();
      }
      data[i][j] = mytable.rows[i].cells[j].innerHTML;
    }
  }
  return data;
}
</script>

Copy after login

3. Complete example of traversing table content

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
 <head>
 <meta http-equiv="content-type" content="text/html;charset=utf-8">
 <title> 获取表格内容 </title>
 <style type="text/css">
 table{width:300px; border:1px solid #000000; border-collapse:collapse;}
 td{border:1px solid #000000; border-collapse:collapse;}
 </style>
 <script type="text/javascript">

  /** 
   * 遍历表格内容返回数组
   * @param Int  id 表格id
   * @return Array
   */
  function getTableContent(id){
    var mytable = document.getElementById(id);
    var data = [];
    for(var i=0,rows=mytable.rows.length; i<rows; i++){
      for(var j=0,cells=mytable.rows[i].cells.length; j<cells; j++){
        if(!data[i]){
          data[i] = new Array();
        }
        data[i][j] = mytable.rows[i].cells[j].innerHTML;
      }
    }
    return data;
  }

  /** 
   * 显示表格内容
   * @param Int  id 表格id
   */
  function showTableContent(id){
    var data = getTableContent(id);
    var tmp = &#39;&#39;;
    for(i=0,rows=data.length; i<rows; i++){
      for(j=0,cells=data[i].length; j<cells; j++){
        tmp += data[i][j] + &#39;,&#39;;
      }
      tmp += &#39;<br>&#39;;
    }
    document.getElementById(&#39;result&#39;).innerHTML = tmp;
  }

 </script>
 </head>

 <body>
  <table id="mytable">
   <tr>
    <td>id</td>
    <td>name</td>
   </tr>
   <tr>
    <td>1</td>
    <td>fdipzone</td>
   </tr>
   <tr>
    <td>2</td>
    <td>wing</td>
   </tr>
  </table>

  <p><input type="button" name="btn" value="获取表格数据" onclick="showTableContent(&#39;mytable&#39;)"></p>
  <p><p id="result"></p></p>
 </body>
</html>

Copy after login

The above is the detailed content of Detailed explanation of the usage code of how javascript traverses table data. For more information, please follow other related articles on the PHP Chinese website!