在angular2中选择无法设置默认文本

此select语句代码未能设置组件的默认文本

<select class="selectpicker" data-style="btn btn-primary btn-round" title="Select a Department" [(ngModel)]="selectedDepartment"
  (ngModelChange)="onChangeDepartment()" required>
      <option *ngFor="let department of departments"
        [ngValue]="department" [selected]="department.name == selectedDepartment">
        {{department.name}}
      </option>
</select>

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看起来ngModel不应该是selectedDepartment，因为selectedDepartment是一个字符串，但部门数组包含对象数组

看这里：

[selected]="department.name == selectedDepartment"

很明显，部门是目标

这里您要分配字符串：

this.selectedDepartment = this.department || 'Select A Department';

---

看起来像一堆类型和变量

ya，department是object，但

department.name

是一个字符串。我想说的是：您在Select控件中工作的数据是对象数组。初始化Select后，将出现对象，而不是字符串。。。您应该继续使用console.log（）和google chrome开发工具检查代码和数据；）我用

[value]=“department.name”[attr.selected]=“department.name===selectedDepartment”>

[selected]="department.name == selectedDepartment"

this.selectedDepartment = this.department || 'Select A Department';