将eval解析转换为json.parse

-1

这属于称为ProcessMaker的BPM应用程序，但逻辑和语法应相对相同。我试图从填充一个网格（基本上是一张表格），从另一个序列化网格中将数据传递到隐藏字段。将eval解析转换为json.parse

传递到隐藏字段中的数据的格式如下：

例：

{"1":{"id":"4332","product":"ball","price":"$5.00",”ordered":"On"}

下面的JavaScript示例上processmaker的wiki发现unserializes隐藏字段作为一个对象，并使用它的信息填充一个新的网格，无论它是什么。 processmaker的wiki上的例子使用eval函数，但是如何使用json.parse（）函数转换它？

 function populateGrid() { 
      var grd = getObject("newAccountsGrid"); 
      //remove all existing rows in the grid (except the first one): 
      var i = Number_Rows_Grid("newAccountsGrid", "accId"); 
      for (; i > 1; i--) 
       grd.deleteGridRow(i, true); 
      //The first row can't be deleted, so clear the fields in the first row: 
      for (i = 0; i < grd.aFields.length; i++) 
       getGridField("contactsGrid", 1, grd.aFields[i].sFieldName).value = ""; 
      //unserialize the hidden field as an object: 
      var oAccounts = eval('(' + getField("sAccounts").value + ')'); 
      if (typeof oAccounts == 'object') { 
       for (var rowNo in oAccounts) { 
       if (rowNo != 1) 
        grd.addGridRow(); 
       getGridField('newAccountsGrid', rowNo, 'accId').href = oAccounts[rowNo]["accountId"]; 
       getGridField('newAccountsGrid', rowNo, 'accName').href = oAccounts[rowNo]["accountName"]; 
       getGridField('newAccountsGrid', rowNo, 'createDate').href = oAccounts[rowNo]["created"]; 
       } 
      } 
     } 
     populateGrid(); //execute when the DynaForm loads

来源

2012-12-28 justWired

你有没有试过阅读'JSON.parse（）'？ https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/JSON/parse – zerkms

这将是简单：

var oAccounts = JSON.parse(getField("sAccounts").value);

来源

2012-12-28 00:48:10

eval("("+something+")") ⇒ JSON.parse(something)

来源

2012-12-28 00:49:42

短短的几行上面这个例子中（ProcessMaker维基），是记下推荐使用JSON.parse（）。使用你的例子，你的代码应该如下：

function populateGrid() { 
    var grd = getObject("newAccountsGrid"); 
    //remove all existing rows in the grid (except the first one): 
    var i = Number_Rows_Grid("newAccountsGrid", "accId"); 
    for (; i > 1; i--) 
     grd.deleteGridRow(i, true); 
    //The first row can't be deleted, so clear the fields in the first row: 
    for (i = 0; i < grd.aFields.length; i++) 
     getGridField("contactsGrid", 1, grd.aFields[i].sFieldName).value = ""; 
    //unserialize the hidden field as an object: 
    var oAccounts = JSON.parse(getField("sAccounts").value); 
    if (typeof oAccounts == 'object') { 
     for (var rowNo in oAccounts) { 
     if (rowNo != 1) 
      grd.addGridRow(); 
     getGridField('newAccountsGrid', rowNo, 'accId').href = oAccounts[rowNo]["accountId"]; 
     getGridField('newAccountsGrid', rowNo, 'accName').href = oAccounts[rowNo]["accountName"]; 
     getGridField('newAccountsGrid', rowNo, 'createDate').href = oAccounts[rowNo]["created"]; 
     } 
    } 
} 
populateGrid(); //execute when the DynaForm loads

来源

2013-05-17 16:48:45 user2378340

将eval解析转换为json.parse

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