Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
523 views
in Technique[技术] by (71.8m points)

angular - Angular2: how bind to select multiple

I'm able to bind using ngModel for a single select but I would like to bind an array to the multiple selected options. When I attempt this I get the error

Cannot find a differ supporting object 'xxx' in 'myModelProperty'

My Code

<select multiple [(ngModel)]="myModelProperty">
    <option *ngFor="#item of myOptions" [value]="item.value">{{item.name}}</option>
</select>
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Why all those complicate answers about simple question.

If you in advance have options which have to be selected, you can do it simply this way :

This code is good :

HTML

<select multiple [(ngModel)]="myModelProperty">
    <option *ngFor="#item of myOptions" [value]="item.value">{{item.name}}</option>
</select>

ANGULAR

myModelProperty: any;
myModelProperty = ['YOUR_VALUE', 'YOUR_VALUE'];

or if you have string, you can parse it

myModelProperty: any;
myModelProperty = string.split(',');

So, all you have to done is that [(ngModel)] from select tag, have to be initialized in angular part with some array of values which correspond to [value] from option tag

This will automatically select one or more options depends on values from array.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...