Question

在下面的Div中，我正在对某些数据使用ng-repeat来填充列表。在执行此操作时，如果通过使用TR上的ng-if指令来满足某个要求，我不想创建一个特定的x.Equipment_Cost_Child != 0标签，但是无论表达式如何，我都无法ng-if正常工作。

如果x.Equipment_Cost_Child > 0，我如何只显示TR？

我尝试过“ x.Equipment_Cost_Child > 0” 我也将ng-if直接附加到tr标签而不是div标签。

你怎么看？

<div  ng-repeat="x in reservationdata" ng-click="customerClickedEvent(x.ID)">
<table class="unit">
Item:{{$index + 1}}
<tr>
    <td style="font-weight:bold">Equipment Type: </td>
    <td style="font-weight:bold">{{x.EquipmentType}}</td>           
</tr>
<tr>    
    <td style="font-weight:bold" >Equipment Count:  </td>
    <td style="font-weight:bold">{{x.Equipment_Count}}</td>
</tr>
<tr>    
    <td>Adult Quantity:  </td>
    <td>{{x.Equipment_Count_Adult}} Cost @ ${{x.Duration_Cost_Adult}}</td>
</tr>
<div ng-if="x.Equipment_Cost_Child != 0">        //this line doesn't work
<tr>    
    <td>Child Quantity:  </td>
    <td>{{x.Equipment_Count_Child}} Cost @ ${{x.Duration_Cost_Child}}</td>
</tr>
</div>
<tr>
    <td>Sending Letters: </td>
    <td> {{x.Equipment_Form_Status}}</td>
</tr>
    <td> Total Cost For Item: </td>
    <td> ${{(x.Equipment_Count_Adult * x.Duration_Cost_Adult)+(x.Equipment_Count_Child * x.Duration_Cost_Child)}}

Answer 1

在一个标签中同时使用ng-if和ng-repeat：

<tr ng-repeat="feature in features"
    ng-if="feature.id === 1" >
</tr>

或者，如果您希望有条件地显示一些模板，则可以使用ng-switch例如：

<tr
    ng-repeat="feature in features"
    ng-switch="feature.id" >
    <span ng-switch-when="1"></span>
    <span ng-switch-when="2"></span>
</tr>

Answer 2

替换：

<div ng-if="x.Equipment_Cost_Child != 0">        //this line doesn't work
<tr>    
    <td>Child Quantity:  </td>
    <td>{{x.Equipment_Count_Child}} Cost @ ${{x.Duration_Cost_Child}}</td>
</tr>
</div>

通过：

<tr ng-show="x.Equipment_Cost_Child > 0">
    <td>Child Quantity:  </td>
    <td>{{x.Equipment_Count_Child}} Cost @ ${{x.Duration_Cost_Child}}</td>
</tr>

<div>标签打破了您的<tr>列表。您可以直接在ng-if上使用<tr>。

编辑：使用ng-show或ng-hide显示/隐藏元素。它的重量要轻得多，因为ng-if会触发DOM重新编译并生成新的作用域。

角ng-repeat与ng-if如果在tr标签上不起作用

2 个答案: