如何使用Angular 2/2 +/4中的外部按钮一次清除md表单内的所有md输入字段 [英] How to clear all the md-input fields at once inside a md-form using an external button in Angular 2/2+/4

问题描述

我想像使用普通HTML表单一样使用外部清除按钮立即清除md表单内的所有字段. md-form的问题在于它包含md-input字段而不是常规输入字段.因此，简单的重置功能不会触发该操作.

I want to clear all the fields inside a md-form at once using an external clear button like you do in normal HTML Forms. The problem with md-form is that it contains md-input fields instead of regular input fields. So the simple reset function won't trigger that.

我已将每个字段的类型设置为搜索"，以提供某种控制，但就像您必须手动单击并删除字段的每个值一样.我想一次全部删除它们.

I've set the type of each field to 'search' that gives some kind of control but it's like u have to manually click and remove each value of the filed. I want to erase them all at once.

有正确的方法吗? 提前致谢.

Is there a proper way to to this? Thanks in advance.

表格代码

<form class="formwidth" (ngSubmit)="searchClass()" #myForm="ngForm">
      <table class="fullwidth" cellspacing="0">
        <tr>
          <td>
          </td>
          <td>
            <md-input-container div="addClassName" *ngIf="classClicked === true">
            <input [(ngModel)]="message.className" mdInput placeholder="Class Name" id="className" name="classname" type="search" >
          </md-input-container>
            <md-input-container div="addJarName" *ngIf="jarFileClicked === true">
              <input [(ngModel)]="message.jarName" mdInput placeholder="Jar File Name" id="jarName" name="jarname" type="search" >
            </md-input-container>
            <md-input-container div="addVersion" *ngIf="versionClicked === true">
              <input [(ngModel)]="message.version" mdInput placeholder="Version" id="versionNumber" name="versionnumber" type="search" >
            </md-input-container>
            <md-input-container div="addDirectory" *ngIf="directoryClicked === true">
              <input [(ngModel)]="message.directory" mdInput placeholder="Directory" id="directoryName" name="directoryname" type="search" >
            </md-input-container>
            <md-input-container div="addDependentClass" *ngIf="dependentClicked === true">
              <input [(ngModel)]="message.dependentClass" mdInput placeholder="Dependent Class Name" id="dependentClassName" name="dependentclassname" type="search" >
            </md-input-container>
          </td>
      </table>
      <br>
      <p *ngIf="classClicked === true || jarFileClicked === true || versionClicked === true || directoryClicked === true || dependentClicked === true">
        <button md-raised-button color="accent" type="submit" id="submitButton">Submit</button>
        <button md-raised-button id="clearButton" (click)="setAllToFalse() && clearFields()">Clear</button>
      </p>
    </form> 

P.S:我也尝试过使用打字稿进行类似的操作.但这不起作用

P.S : I tried something like this with typescript as well. But it don't work

clearFields(){
    this.message.jarName="";
    this.message.className="";
    this.message.version="";
    this.message.directory="";
    this.message.dependentClass="";

  }

推荐答案

只需在另一个方法内部调用clearFields()方法即可.

Simply calling the clearFields() method inside another method worked.

setAllToFalse(){
    this.classClicked = false;
    this.jarFileClicked = false;
    this.versionClicked = false;
    this.directoryClicked = false;
    this.dependentClicked = false;
    this.condition_1 = false;
    this.condition_2 = false;
    this.condition_3 = false;
    this.condition_4 = false;
    this.condition_5 = false;
    this.condition_6 = false;
    this.condition_7 = false;
    this.clearFields();
  }

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