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JavaScript method to dynamically add columns_javascript skills

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Release: 2016-05-16 16:07:36
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The example in this article describes the method of dynamically adding columns in JavaScript. Share it with everyone for your reference. The specific implementation method is as follows:

/*** 
 * 动态添加table 列 
 * @param result 
 */ 
function addRow(resultJson){ 
/* var temp = []; 
 temp = $.grep(arr, function(val, key) { 
  if(val.indexOf('c') != -1) 
   return true; 
// 如果[invert]参数不给或为false, $.grep只收集回调函数返回true的数组元素 
// 反之[invert]参数为true, $.grep收集回调函数返回false的数组元素 
 }, false); 
 console.dir(temp); 
 */ 
 if(resultJson!=""){ 
   var cv_arr=new Array(); 
   var date_arr = new Array(); 
//将数据源解析,并解析成程序可认的date及result 
   $.each(resultJson, function(index, val) { 
    if(val['parser_schedule']!=null){ 
     cv_arr.push(val['parser_schedule']); 
     var temp_data =val['parser_schedule'].split(","); 
     for(i=0;i<temp_data.length;i++){ 
      var temp = temp_data[i].split(":"); 
      date_arr.push(temp[0]); 
     } 
    } 
   }); 
   date_arr = unique(date_arr); 
  date_arr.in_arr = function(value) { 
   var a = this;
   //为了增加方法扩展适应性。我这稍微修改了下 
   for (var i = 0; i < a.length; i++) { 
    if (a[i] == value) 
     return i; 
   } 
  } 
  //ARR下标值从0开始 
  var old_td_n = $("#mytable thead tr").find("th").length;
  //获取已有的TH 
  //设置TH信息 
  for(i=0;i<date_arr.length;i++){ 
   //注意TH和TD,样式不一样 
   $("#mytable thead tr").append("<th>"+date_arr[i]+"</th>"); 
   $("#mytable tbody tr").append("<td>-</td>"); 
  } 
  var rowNum_arr=new Array(); 
  //获取一共有多少行 
  for(i=0;i<$("#mytable").find("tr").length;i++){ 
//获取每一行中第三列的值,table前两列隐藏,第三列开始判断是否有数据 
   var str=$("#mytable tbody").find("tr").eq(i); 
   var std=str.find("td").eq(2); 
   //当没有值的时候记录,获取行号 
   if($.trim(std.text()).length <1){ 
    rowNum_arr.push(i); 
   }else{ 
  //  $(std).html(""); 
   } 
  } 
  //设置TD信息 
  for(i=0;i<cv_arr.length;i++){ 
   //获取RESULT_ARR中的日期数据 
   var temp_str = cv_arr[i];//OK 
   //将日期数据用","分割成数组 
   var temp_arr = temp_str.split(",");//OK [03-11:10,03-12:9,03-13:8,03-14:15] 
   for(j=0;j<temp_arr.length;j++){ 
    //获取数据集 为字符串例如03-11:10 
    var temp_result = temp_arr[j]; 
    /* 
     将数据集分割为数组[03-11:10] 
     ARR[0] 03-11 
     ARR[1] 10 
    */ 
    var temp_result_arr = temp_result.split(":");
    //设置第I行的TR里的内容 
    $("#mytable tbody").find("tr").eq(rowNum_arr[i]).find("td").eq(old_td_n+date_arr.in_arr(temp_result_arr[0])).html(temp_result_arr[1]);  
    // 应用样式 
    $("#tb tr:even td").addClass("alt");//行的颜色 
    $("#tb tr").find("td:eq(2)").addClass("spec"); 
    $("#tb tr:even").find("td:eq(2)").addClass("specalt"); 
   } 
  } 
 } 
}

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I hope this article will be helpful to everyone’s JavaScript programming design.

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