【发布时间】：2015-02-07 17:39:23
【问题描述】：
我正在尝试使用一个按钮在单击该按钮时在 html 表中添加一个新行，并使用另一个按钮在选中其复选框的情况下删除该行。我遇到了两个问题：
- 每当点击添加按钮时，我都会得到
Removing disallowed attribute SELECT on-change="{{ onChangeTypeFired }}" - 如果我选中两个复选框并单击删除行按钮，则会引发 indexIndexSizeError：索引或大小为负数，或大于允许的值。提供的索引 (2) 大于表中的行数 (2)。
文件如下所示
.html
<!DOCTYPE html>
<link rel='import' href='../../../../packages/polymer/polymer.html' >
<link rel='import' href='../../../../packages/paper_elements/paper_checkbox.html' >
<link rel='import' href='../../../../packages/paper_elements/paper_button.html' >
<link rel='import' href='../../../../packages/core_elements/core_collapse.html' >
<link rel='import' href='../../../../packages/core_elements/communication_icons.html' >
<polymer-element name='phone-form'>
<template>
<div
class='parent-container'>
<paper-button id='add-btn' on-click='{{toggle}}'>
<core-icon id='toggle-btn-icon' icon=''></core-icon>
Phone
<core-icon id='validation-icon' class='margin-l5px' icon=''></core-icon>
</paper-button>
<table id='table' border='1' width='350px'>
<tbody><tr>
<td><input name='chk' type='checkbox'></td>
<td>
<select id='phoneType' class='width95percent'
selectedIndex='{{typeSelected}}'
on-change='{{onChangeTypeFired}}'>
<option template repeat='{{key in types.keys}}'
value='{{types[key]}}'>{{types[key]}}
</option>
</select>
</td>
</tr>
</tbody></table>
</div>
<div>
<paper-button raised id='add-row-btn' class='margin-8px'
on-click='{{addRow}}'>
Add Row
<core-icon id='add-row-btn-icon' icon='check-all'></core-icon>
</paper-button>
<paper-button raised id='delete-row-btn' class='margin-8px'
on-click='{{deleteRow}}'>
Delete Selected Row(s)
<core-icon id='delete-row-btn-icon' icon='check'></core-icon>
</paper-button>
</div>
</div>
</template>
<script type='application/dart' src='phone_form.dart'></script>
</polymer-element>
.dart
import 'package:polymer/polymer.dart';
import 'dart:html' as dom;
import 'package:paper_elements/paper_button.dart' show PaperButton;
import 'package:core_elements/core_collapse.dart';
//import 'package:epimss_shared/epimss_shared.dart';
//import 'package:epimss_shared/epimss_shared_client.dart' hide DataEvent;
@CustomTag('phone-form')
class PhoneForm extends PolymerElement {
@observable String errorMsg;
String topic;
PaperButton addBtn;
int typeSelected = 0;
CoreCollapse coreCollapse;
@observable
Map<String, String> types = <String, String> {
'': '',
'Car': 'Car',
'Direct': 'Direct',
'Fax': 'Fax',
'Home': 'Home',
'Mobile': 'Mobile',
'Video': 'Video',
'Work': 'Work'
};
PhoneForm.created() : super.created();
void toggleCoreCollapse() {
coreCollapse.toggle();
}
void onSelectTypeFired()
{
}
void onChangeTypeFired( dom.Event e, var detail, dom.SelectElement target)
{
print(target.value);
}
void addRow()
{
var table = $['table'];
var rowCount = table.rows.length;
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i = 0; i<colCount; i++ )
{
var newcell = row.insertCell(i);
newcell.innerHtml = table.rows[0].cells[i].innerHtml;
switch(newcell.childNodes[0].runtimeType.toString())
{
case 'text':
newcell.childNodes[0].value = '';
break;
case 'checkbox':
newcell.childNodes[0].checked = false;
break;
case 'select':
newcell.childNodes[0].selectedIndex = 0;
break;
}
}
}
void deleteRow()
{
var rowsToDelete = [];
try{
var table = $['table'];
var rowCount = table.rows.length;
for(var i = 0; i < rowCount; i++)
{
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(chkbox != null && chkbox.checked)
{
if(rowCount <= 1)
{
print('Cannot delete all the rows.');
break;
}
else
{
rowsToDelete.add(i);
}
}
}
rowsToDelete.forEach( (row)
{
table.deleteRow(row);
});
}
catch(e)
{ print(e); }
}
@override
void attached() {
super.attached();
topic = this.dataset['topic'];
coreCollapse = $['core-collapse'];
addBtn = $['add-btn'];
}
}
感谢您的帮助。
【问题讨论】：
标签： dart dart-polymer