小编OCD*_*Dev的帖子

正如标题所说,我有一个包含多个<mat-select>内容的反应形式.在初始表单加载时,即使form.value显示初始选项,也不会显示初始选项.

相关组件:

export class DesJobInfoEditComponent implements OnInit {

...

currentJobData: IJob;
jobTypes: IJobType[];

...

constructor(private fb: FormBuilder) {

    ...

        // Construct forms
        this.createForm();

        this.initializeForm();

}

createForm() {
    this.editJobInfoForm = this.fb.group({
        ...
        JobType: '', // mat-select
        ...
    });
}

initializeForm() {
    this.rebuildForm();
}

rebuildForm() {
    this.editJobInfoForm.reset({
        ...
        JobType: this.jobTypes[this.currentJobData.JobType].DisplayDesc,
        ...
    });
}

}

相关的HTML:

<mat-form-field fxFlex>
      <mat-label>Job Type</mat-label>
       <mat-select formControlName="JobType" placeholder="Job Type">
              <mat-option *ngFor="let jobType of jobTypes" value="jobType.value">
                     {{ jobType.DisplayDesc }}
               </mat-option>
        </mat-select>
  </mat-form-field>

加载表单时,选择不显示最初选择的选项,但是,它们设置正确,显然:

Form value …