te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - Create multiple elements in loop Angular2 - Stack Overflow

科技改变生活-雨落星辰 - 所有的伟大,都源于一个勇敢的开始

    最新消息：雨落星辰是一个专注网站SEO优化、网站SEO诊断、搜索引擎研究、网络营销推广、网站策划运营及站长类的自媒体原创博客
    你的位置： 首页>programmer>javascript - Create multiple elements in loop Angular2 - Stack Overflow

    javascript - Create multiple elements in loop Angular2 - Stack Overflow

    programmeradmin2浏览0评论

    Edit: About the possible answer: I came across that question/answer too and implemented it that way. However, with the new version of Angular2 the syntax is different. The documentation about ngFor wasn't updated (this is where I looked). So I wrote the wrong code. The documentation about ngFor is updated in the Template Syntax - ngFor. Günter wrote a correct example on how to use it in the newer versions of Angular2 (beta17 or higher).

    I'd like to create multiple elements in a loop. This is what I have now:

    <table>
    <thead>
        <th>ID</th>
        <th>Name</th>
    </thead>
    <tbody>
        <tr *ngFor="let item of items" class="info">
            <td>{{ item['id'] }}</td>
            <td>{{ item['name'] }}<td>
        </tr>
    </tbody>
</table>

    What I'd like is under ever tr another tr with details. The desired output should look like this in the browser:

    <table>
    <thead>
        <th>ID</th>
        <th>Name</th>
    </thead>
    <tbody>
        <tr class="info">
            <td>1</td>
            <td>Item 1<td>
        </tr>
        <tr class="details">
            <!-- More detailed info about item 1 -->
        </tr>
        <tr class="info">
            <td>2</td>
            <td>Item 2<td>
        </tr>
        <tr class="details">
            <!-- More detailed info about item 2 -->
        </tr>
    </tbody>
</table>

    How can I achieve the desired result?

    Edit: About the possible answer: I came across that question/answer too and implemented it that way. However, with the new version of Angular2 the syntax is different. The documentation about ngFor wasn't updated (this is where I looked). So I wrote the wrong code. The documentation about ngFor is updated in the Template Syntax - ngFor. Günter wrote a correct example on how to use it in the newer versions of Angular2 (beta17 or higher).

    I'd like to create multiple elements in a loop. This is what I have now:

    <table>
    <thead>
        <th>ID</th>
        <th>Name</th>
    </thead>
    <tbody>
        <tr *ngFor="let item of items" class="info">
            <td>{{ item['id'] }}</td>
            <td>{{ item['name'] }}<td>
        </tr>
    </tbody>
</table>

    What I'd like is under ever tr another tr with details. The desired output should look like this in the browser:

    <table>
    <thead>
        <th>ID</th>
        <th>Name</th>
    </thead>
    <tbody>
        <tr class="info">
            <td>1</td>
            <td>Item 1<td>
        </tr>
        <tr class="details">
            <!-- More detailed info about item 1 -->
        </tr>
        <tr class="info">
            <td>2</td>
            <td>Item 2<td>
        </tr>
        <tr class="details">
            <!-- More detailed info about item 2 -->
        </tr>
    </tbody>
</table>

    How can I achieve the desired result?

    • javascript
    • angular
    Share Improve this question edited May 12, 2016 at 9:33 Starfish asked May 12, 2016 at 8:56 StarfishStarfish 3,5741 gold badge23 silver badges55 bronze badges 2
    • I can't get info and details below each other like: info - details - info - details. Everything I tried resulted in: info - info - details - details. Solution might be very simple but I'm stuck. – Starfish Commented May 12, 2016 at 8:58
    • 2 This might be a solution: stackoverflow./questions/34533200/… – martinczerwi Commented May 12, 2016 at 8:58
    Add a ment  | 

    4 Answers 4

    Reset to default 9

    <template ngFor [ngForOf]="items" let-item> is the canonical for of *ngFor and allows to repeat more than one element.

    import {Component} from '@angular/core'

@Component({
  selector: 'my-app',
  providers: [],
  template: `
    <div>
      <h2>Hello {{name}}</h2>
<table>
    <thead>
        <th>ID</th>
        <th>Name</th>
    </thead>
    <tbody>
      <template ngFor [ngForOf]="items" let-item>
        <tr class="info">
          <td>{{ item['id'] }}</td>
          <td>{{ item['name'] }}<td>
        </tr>
        <tr class="details">
          <td>{{ item['description'] }}<td>
        </tr>
      </template>    
    </tbody>
</table>

    </div>
  `,
  directives: []
})
export class App {
  items = [
    {name: 'name1', id: 1, description: 'description1'}
    {name: 'name2', id: 2, description: 'description2'}
    {name: 'name3', id: 3, description: 'description3'}
  ];
  constructor() {
    this.name = 'Angular2 (Release Candidate!)'
  }
}

    Plunker example

    In contrary to Polymer (for example), using <template> within <tbody> (or other table elements <tr>, ...) also works fine in IE with Angular2, because Angular2 processes the template internally and never adds it to the DOM. In Polymer this would not work because IE removes "unexpected" tags from table elements (which breaks Poymers <template is="dom-repeat">) See also http://caniuse./#search=template

    Use following ponent code:

    import { Component } from '@angular/core';

@Component({
  selector: 'demo-app',
  templateUrl: 'app/app.ponent.html',
  pipes: []
})
export class AppComponent {
  constructor() { 
    this.items = [
        {id: 1, name: 'Bob', details: 'Bob details'},
        {id: 2, name: 'Sarah', details: 'Sarah details'},
        {id: 3, name: 'Sam', details: 'Sam details'},
        {id: 4, name: 'Susan', details: 'Susan details'}
    ];
  }
}

    With following app.ponent.html file:

    <table>
    <thead>
        <th>ID</th>
        <th>Name</th>
    </thead>
    <tbody>
      <template ngFor [ngForOf]="items" let-item>
        <tr class="info">
            <td>{{ item['id'] }}</td>
            <td>{{ item['name'] }}<td>
        </tr>
        <tr class="details">
            <td colspan=2>{{ item['details'] }}</td>
            <!-- More detailed info about item -->
        </tr>
      </template>
    </tbody>
</table>

    Result is something like this:

    <table>
    <thead>
        <th>ID</th>
        <th>Name</th>
    </thead>
    <tbody>
        <tr class="info">
            <td>1</td>
            <td>Bob</td><td>
        </td></tr>
        <tr class="details">
            <td colspan="2">Bob details</td>                
        </tr>          
        <tr class="info">
            <td>2</td>
            <td>Sarah</td><td>
        </td></tr>
        <tr class="details">
            <td colspan="2">Sarah details</td>                
        </tr>          
        <tr class="info">
            <td>3</td>
            <td>Sam</td><td>
        </td></tr>
        <tr class="details">
            <td colspan="2">Sam details</td>                
        </tr>          
        <tr class="info">
            <td>4</td>
            <td>Susan</td><td>
        </td></tr>
        <tr class="details">
            <td colspan="2">Susan details</td>                
        </tr>          
    </tbody>
</table>

    For more information read https://coryrylan./blog/angular-2-ng-for-syntax

    You can achieve this by looping on <tbody> instead of <tr>, as tables with mutiple tbody is valid in html refer to.

    So your code will be like

    <table>
        <thead>
            <th>ID</th>
            <th>Name</th>
        </thead>
        <tbody *ngFor="let item of items; #idx = index">
            <tr class="info">
                <td>{{idx}}</td>
                <td>Item {{idx}}<td>
            </tr>
            <tr class="details">
                <td>{{ item['id'] }}</td>
                <td>{{ item['name'] }}<td>
            </tr>
         </tbody>
    </table>
</table>

    Since Angular v4 <template> tag is deprecated. Use <ng-template> instead, as described in tutorial: ng-template-element

    与本文相关的文章

    发布评论

    评论列表(0)

    1. 暂无评论