Detailed explanation of how jQuery implements editable tables and generates json results

This article mainly introduces jquery to implement editable tables and generate json results. The code parsing and loading functions are implemented with front-end js, which simplifies the back-end code logic. It is very good and has reference loading. Friends who need it can refer to it. I hope Can help everyone.

The implementation effect is as follows. While editing the form, the field json content can be automatically changed. Click submit to save it to the background. When the page is loaded, the json is automatically parsed and the table content is loaded. The code parsing and loading functions are implemented using front-end js, which simplifies the back-end code logic.

Define the table header to be operated:

<input readonly="readonly" class="form-control" type="text" id="scorerange" value="" name="scorerange"/> 
                      <table id="mytable"> 
                          <tr> 
                            <th style="width: 20%;">分数区间</th><th style="width:20%;">等级</th><th style="width:60%;">建议内容</th><th></th> 
                       </tr> 
                         <!--                         <tr><td><input onblur="caljson()" type="text" style="width: 50px;" >-<input type="text" style="width: 50px;" /></td> 
                          <td><input onblur="caljson()" type="text" style="width: 100%;" ></td> 
                          <td><input onblur="caljson()" id="btn1" type="button" onclick="$(this).parent().parent().remove()" value="删除" /></td></tr>                        -->                       </table>

Define the operation code

function insertRowLast(newrow,s1,s2,s3,s4) { 
  if(newrow){ 
    var newRow = "<tr><td><input onblur=\"caljson()\" value=\"0\" type=\"text\" style=\"width: 50px;\" >-<input value=\"0\" type=\"text\" style=\"width: 50px;\" /></td>"; 
    newRow+="<td><input  onblur=\"caljson()\"  type=\"text\" style=\"width: 50px;\" ></td>"; 
    newRow+="<td><input maxlength=\"24\" onblur=\"caljson()\"  type=\"text\" style=\"width: 100%;\" ></td>"; 
    newRow+="<td><input  onblur=\"caljson()\"  id=\"btn1\" type=\"button\" onclick=\"$(this).parent().parent().remove();caljson();\" value=\"删除\" /></td></tr>"; 
    $("#mytable tr:last").after(newRow); 
  }else{ 
    var newRow = "<tr><td><input value=\""+s1+"\" onblur=\"caljson()\" type=\"text\" style=\"width: 50px;\" >-<input value=\""+s2+"\" type=\"text\" style=\"width: 50px;\" /></td>"; 
    newRow+="<td><input value=\""+s4+"\"  onblur=\"caljson()\"  type=\"text\" style=\"width: 50px;\" ></td>"; 
    newRow+="<td><input maxlength=\"24\" value=\""+s3+"\"  onblur=\"caljson()\"  type=\"text\" style=\"width: 100%;\" ></td>"; 
    newRow+="<td><input  onblur=\"caljson()\"  id=\"btn1\" type=\"button\" onclick=\"$(this).parent().parent().remove();caljson();\" value=\"删除\" /></td></tr>"; 
    $("#mytable tr:last").after(newRow); 
  } 
  caljson(); 
} 
var json=""; 
function caljson(){ 
 json="{\"scorerange\":["; 
 var idx = 0;  
 var idxlen = $("#mytable").find("tr").length; 
 $("#mytable").find("tr").each(function () { 
  if(idx==0){ 
  idx++; 
    return; 
  } 
　　var tdArr = $(this).children(); 
  var v1 = tdArr.eq(0).find(&#39;input&#39;).eq(0).val(); 
  var v2 = tdArr.eq(0).find(&#39;input&#39;).eq(1).val(); 
  var v3 = tdArr.eq(2).find(&#39;input&#39;).val(); 
  var v4 = tdArr.eq(1).find(&#39;input&#39;).val(); 
  json+="{\"s1\":\""+v1+"\",\"s2\":\""+v2+"\",\"content\":\""+v3+"\",\"classg\":\""+v4+"\"}"; 
  idx++; 
  if(idx!=idxlen){ 
  json+=","; 
  } 
}); 
json+="]}"; 
$("#scorerange").val(json); 
//alert($("#scorerange").val()); 
} 
//alert(1); 
//alert($("#scorerange").val()); 
var dataObj=eval("($!{tbscence.scorerange})"); 
if(dataObj && dataObj.scorerange){ 
 //alert(dataObj.scorerange.length); 
 for(var i=0;i<dataObj.scorerange.length;i++){ 
  var s1 = dataObj.scorerange[i].s1; 
  var s2 = dataObj.scorerange[i].s2; 
  var s3 = dataObj.scorerange[i].content; 
  var s4 = dataObj.scorerange[i].classg; 
  //alert(s1+" "+s2+" "+s3); 
  insertRowLast(false,s1,s2,s3,s4); 
 } 
}else{ 
 insertRowLast(true,0,0,0,0); 
}

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