Select Dropdowns in Angular 2 a built with select and option elements. You use *ngFor to loop through your values and create options and use ngModel to keep track of the value as it changes.
<form #formRef="ngForm"> <select name="location" [ngModel]="locations[0]"> <option *ngFor="let location of locations" [value]="location"> {{location}} </option> </select> </form>
[Angular2 Form] Build Select Dropdowns for Angular 2 Forms
原文：http://www.cnblogs.com/Answer1215/p/5921106.html