如何在 angular 2 中禁用多个文本框

How to disable multiple textboxes in angular 2

我有 'n' 行,其中有文本框和 select 框。当我使用 angular 更改同一行中 select 框的值时,我试图禁用文本框 2.

我的代码如下:

<table>
  <tr>
    <td><input type="text" (disabled)="isDisabled(data.rowIndex)"</td>
    <td> <select (onValueChanged)="test(data.rowIndex)">
           <option>Yes</option>
           <option>No</option>
    </td>
   </tr>
   <tr>
    <td><input type="text" (disabled)="isDisabled(data.rowIndex)"</td>
    <td> <select (onValueChanged)="test(data.rowIndex)">
           <option>Yes</option>
           <option>No</option>
    </td>
   </tr>
   .
   .
   .
</table>

component.ts

tabNumber: number = -1;

test(valueID){
        this.tabNumber = valueID;
}

isDisabled(num){
        return this.tabNumber === num;
    }

上面这一行仅禁用了我最近 select编辑的一个文本框,并启用了其他文本框。因此,我的代码一次只能 enable/disable 一个文本框。但我想根据我的 selection 禁用多个框。有人可以帮忙吗?

查看它的实际应用:plunker

html :

<table>
   <tr *ngFor="let item of items; let i = index">
    <td><input type="text" [disabled]="isDisabled(i)"/></td>
    <td> <select (change)="toggle($event,i)">
           <option value="yes">Yes</option>
           <option value="no">No</option>
          </select>
    </td>
   </tr>

</table>

组件:

export class AppComponent {
   items = [{value : "hi"},{value : "hi"},{value : "hi"},{value : "hi"}]
   rows: number[] = [];

  isDisabled(index) {
    return this.rows[index] === -1;
  }

  enable(index){
    this.rows[index] = 1;
  }

  toggle($event,index){
    let selectElement = $event.target; 
    let value = selectElement.options[selectElement.selectedIndex].value;
    if(value === "yes"){
       this.enable(index);
    }else{
       this.disable(index);
    }
  }

  disable(index){
    this.rows[index] = -1;
  }
}