FormGroup CustomFilter中的Mat-AutoComplete

New*_*iie 6 autocomplete filter angular-material angular

我正在使用Angular CLI。而且,我想制作一个自动填充的表单,该表单可以显示所有值(不像执行“开始于”的angular.io示例一样)。

我设法使其兼容,[formControl]但我想将其插入FormGroup。因此,我认为与formControlName(同时使用formControlName[formControl])一起使用它意味着我没有从表单中获得价值。

这是我当前的代码,过滤器上有问题。谢谢您的帮助

component.html

<form [formGroup]="tumeurForm" (ngSubmit)="onSubmitForm()">
  <mat-form-field appearance="outline">
    <mat-label>Diagnostic : inscription de la tumeur</mat-label>
    <input
      matInput 
      type="text" 
      formControlName="localisation"
      [matAutocomplete]="auto"/>
    <mat-autocomplete autoActiveFirstOption #auto="matAutocomplete">
      <mat-option *ngFor="let option of filteredOptions | async" [value]="option">
        {{ option }}
      </mat-option>
    </mat-autocomplete>
  </mat-form-field>
</form>
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component.ts

export class DiagnosticDialogComponent implements OnInit  {

  options = [
    "(C00) Néoplasie maligne de la lèvre",
    "(C00.0) Lèvre supérieure, bord libre",
    "(C00.1) Lèvre inférieure, bord libre"
  ];

  patientid: string;
  public tumeurForm: FormGroup ;
  filteredOptions: Observable<string[]>;


  constructor(private formBuilder: FormBuilder) { }

  ngOnInit() {
    this.initForm();
    this.filteredOptions = this.tumeurForm.valueChanges.pipe(
      startWith(""), 
      map(val => this.filter(val))
    );
  }

  filter(val: string): string[] {
    return this.options.filter(option => {
      return option.toLowerCase().match(val.toLowerCase());
    });
  }

  initForm() {
    this.tumeurForm = this.formBuilder.group({
      localisation: ['', Validators.required]
    });
  }

  onSubmitForm() {
    const localisation = this.tumeurForm.get('localisation').value;
    const Patientid = this.patientid;
    const newDiagnostic = new Diagnostic(localisation, Patientid);
    this.diagnosticsService.CreateDiagnostic(newDiagnostic);
  }
}
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Mar*_*der 7

(如果我正确理解了问题)

您在被管道FormGroup.valueChanges。但是您需要在上执行此操作FormControl

所以代替

this.filteredOptions = this.tumeurForm.valueChanges.pipe(
  startWith(""), 
  map(val => this.filter(val))
);
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做这个:

this.filteredOptions = this.tumeurForm.controls['localisation'].valueChanges.pipe(
  startWith(""), 
  map(val => this.filter(val))
);
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