我在* ngFor中执行具有不同id的输入类型。我想获取所有输入类型的ID和数据，在该类型中，用户已在* ngFor外部的按钮单击上输入了文本。这是我编写的代码：
Angular HTML Code --
<div *ngFor="let number of [0,1,2,3,4,5,6] ; let i = index" style="margin-top:10px;">
<input type="text" (value)="Value=$event" id="val-{{i}}"></input>
</div>
<div>
<button type="button" (click)="add();">Add</button>
</div>
Angular Typescript Code --
Value:string;
val:string;
add(){
console.log("Value:"+this.Value+" -- "+this.val);
}
我只得到this.value的结果，但没有得到this.val。
因此，如果有人可以指导如何获取输入的文本输入框的值和ID。
谢谢
答案 0 :(得分：0)
您可以使用@ViewChildren来获取所有输入元素作为查询列表。您必须以HTML设置引用。
HTML代码：
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href='https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css' rel='stylesheet'>
<link href='https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css' rel='stylesheet'>
<link href="css/style.css" rel="stylesheet">
<body>
<div class="col-lg-12">
<div class="container">
<div class="row">
<section class="panel panel-default">
<div class="panel-body">
<div class="row">
<div class="col-lg-3">
<h1>Animal Files</h1>
</div>
<div class="col-lg-9">
<div class="input-group">
<span class="input-group-btn"><button class="btn btn-default" type="button"><span class="input-group-btn"><i aria-hidden="true" class="fa fa-search"></i></span></button>
</span> <input class="form-control" id="accordion_search_bar" placeholder="Typing in a word like 'legless' will make snake the only accordion row available." type="search">
</div>
<!-- /input-group -->
</div>
<!-- /.col-lg-6 -->
</div>
<div class="row">
<div class="col-lg-12 col-xs-12">
<div aria-multiselectable="true" class="panel-group" id="accordion" role="tablist">
<div class="panel panel-default" id="collapseOne_container">
<div class="panel-heading" id="headingOne" role="tab">
<h4 class="panel-title"><a aria-controls="collapseOne" aria-expanded="true" data-parent="#accordion" data-toggle="collapse" href="#collapseOne" role="button"><i aria-hidden="true" class="fa fa-paw fa-fw"></i>Lion</a></h4>
</div>
<div aria-labelledby="headingOne" class="panel-collapse collapse" id="collapseOne" role="tabpanel">
<div class="panel-body">
<p>The lion (Panthera leo) is one of the big cats in the genus Panthera and a member of the family Felidae. The commonly used term African lion collectively denotes the several subspecies in Africa. With some males exceeding 250 kg
(550 lb) in weight, it is the second-largest living cat after the tiger. Wild lions currently exist in sub-Saharan Africa and in India (where an endangered remnant population resides in Gir Forest National Park). In ancient historic
times, their range was in most of Africa, including North Africa, and across Eurasia from Greece and southeastern Europe to India. In the late Pleistocene, about 10,000 years ago, the lion was the most widespread large land mammal
after humans: Panthera leo spelaea lived in northern and western Europe and Panthera leo atrox lived in the Americas from the Yukon to Peru.</p>
</div>
</div>
</div>
<div class="panel panel-default" id="collapseTwo_Container">
<div class="panel-heading" id="headingTwo" role="tab">
<h4 class="panel-title"><a aria-controls="collapseTwo" aria-expanded="false" class="collapsed" data-parent="#accordion" data-toggle="collapse" href="#collapseTwo" role="button"><i aria-hidden="true" class="fa fa-paw fa-fw"></i>Snake</a></h4>
</div>
<div aria-labelledby="headingTwo" class="panel-collapse collapse" id="collapseTwo" role="tabpanel">
<div class="panel-body">
<p>Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack of eyelids and external ears. Like all squamates, snakes are ectothermic, amniote vertebrates
covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads with their highly mobile jaws. To accommodate
their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws
on either side of the cloaca.</p>
</div>
</div>
</div>
<div class="panel panel-default" id="collapseThree_Container">
<div class="panel-heading" id="headingThree" role="tab">
<h4 class="panel-title"><a aria-controls="collapseThree" aria-expanded="false" class="collapsed" data-parent="#accordion" data-toggle="collapse" href="#collapseThree" role="button"><i aria-hidden="true" class="fa fa-paw fa-fw"></i>Meerkat</a></h4>
</div>
<div aria-labelledby="headingThree" class="panel-collapse collapse" id="collapseThree" role="tabpanel">
<div class="panel-body">
<p>The meerkat or suricate (Suricata suricatta) is a small carnivoran belonging to the mongoose family (Herpestidae). It is the only member of the genus Suricata. Meerkats live in all parts of the Kalahari Desert in Botswana, in much
of the Namib Desert in Namibia and southwestern Angola, and in South Africa. A group of meerkats is called a "mob", "gang" or "clan". A meerkat clan often contains about 20 meerkats, but some super-families have 50 or more members.
In captivity, meerkats have an average life span of 12–14 years, and about half this in the wild.</p>
</div>
</div>
</div>
</div>
<p>Information is provided by Wikipedia</p>
</div>
</div>
<!-- Row -->
</div>
<!-- Col -->
</section>
</div>
<!-- Container -->
</div>
</div>
</body>
</html>Component.ts
<input type="text" #inputTag (value)="Value=$event" id="val{{i}}" />
此后，您可以添加过滤器操作以过滤出空输入