如何重设控制值? [英] How to reset Control value?

问题描述

我试图控制我们在哪里可以输入带有标签及其得分的多个玩家.

I'm trying to make a control where we can enter multiple player with tag and their score.

但是，当我们单击AddPlayer按钮时，我创建了一个播放器，然后需要将表单控件值重置为默认值.

But when we click on my AddPlayer Button I create a player then I need to reset the form control value to default.

我尝试了很多事情，但是没有任何效果..它永远不会改变视图值.

I've tried a lot of things but nothing works .... it never changes the view value.

这是代码:

addPlayer(form: ControlGroup) {
    var player = new Player();
    player.tag = form.value.tag;
    player.name = form.value.name;
    player.score = form.value.score;

    // nothing work
    form.value = null;
    form.value.tag = null;
    form.value.tag = '';

    this.playerService.addPlayer(player.tag, player.name, player.score);
    this.newplayer.next(player);
}

这是html

<form (submit)="addPlayer(playerForm)" [ng-form-model]="playerForm">
    <div class="form-group" [class.has-error]="!playerForm.find('tag').valid && playerForm.find('tag').touched">
        <div class="col-md-3 text-right">
            <label for="tag">Tag: </label>
        </div>

        <input type="text" id="tag" #tag="form" [ng-form-control]="playerForm.controls['tag']"  placeholder="Tag"/>

        <span *ng-if="tag.control.hasError('required') && !tag.control.pristine">Tag is required</span>
    </div>

    <div class="form-group" [class.has-error]="!playerForm.find('name').valid && playerForm.find('name').touched">
        <div class="col-md-3 text-right">
            <label for="name">Player Name: </label>
        </div>

        <input type="text" id="name" #name="form" [ng-form-control]="playerForm.controls['name']" placeholder="Player Name" />

        <span *ng-if="name.control.hasError('required') && !name.control.pristine">Player Name is required</span>
    </div>

    <div class="form-group" [class.has-error]="!playerForm.find('score').valid && playerForm.find('score').touched">
        <div class="col-md-3 text-right">
            <label for="score">Score: </label>
        </div>

        <input type="number" id="score" #score="form" [ng-form-control]="playerForm.controls['score']" value="0" min="0" max="200" />

        <span *ng-if="score.control.hasError('required') && !score.control.pristine">Score is required</span>
    </div>

    <button type="submit" class="btn btn-primary">
        Add Player
    </button>
</form>

那么我该如何重置控件的值?

So how can i reset the value of the control?

推荐答案

要重置表单，最简单的方法是重建表单生成器. 单击添加播放器按钮后

To reset the form the easiest way is rebuild the form builder. After clicking the add player button

this.playerForm = this.builder.group({
        'name': [...],
        'tag': [...],
        'score': [...]
    });

这篇关于如何重设控制值?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！