Refreshing the Angular dropdown menu

I am facing an issue with a dropdown that I can't seem to reset. Despite clicking on "clear", the dropdown retains the last selection instead of resetting.

Although I have successfully reset another dropdown using the same method, I'm struggling to reset this particular dropdown. As a newcomer to angular, any assistance would be greatly appreciated.

<div class="db-dropdown">
    <label for="dbdropdown">Site selection:</label>
    <select required class="dbdropdown" name="dbdropdown" id="dbdropdown" [(ngModel)]="selectedLabel" (change)="onSelect(selectedLabel)" [disabled]="isRunning">
        <option value='Please select DB'>Please select DB</option>
        <option *ngFor="let option of options" [ngValue]="option.label">{{option.label}}</option>
    </select>

    <div *ngIf="selectedValues && selectedValues.length">
        <app-connectionCode-dropdown></app-connectionCode-dropdown>
    </div>
</div>

This is how I've set up ngOnInit in dropdown.ts:

ngOnInit() {
    this.selectedLabel = this.dataService.selectedLabelDBSelection;
    this.DBDropdownService.getOptions().subscribe(options => {
      this.options = options;
    });
    this.dataService.isRunning$.subscribe(isRunning => this.isRunning = isRunning)
  }

Here's the method I'm using to reset the selections in buttons.ts:

resetSelects() {
    console.log('resetting selects');
    this.dataService.setRunClick(false);
    this.dataService.setSelectedValueDb('Please select DB');
    this.dataService.setSelectedLabelDBSelection('Please select DB');
    console.log('selectedLabelDBSelection:', this.dataService.selectedLabelDBSelection);
    this.dataService.setSelectedValue('');
    this.dataService.setSelectedProcedure('');
    this.dataService.clearContents.next(true);
    this.dataService.setIsRunning(false);
  }

And here's the relevant method in the service:

setSelectedLabelDBSelection(value: string){
    this.selectedLabelDBSelection = value;
  }
selectedLabelDBSelection: string;

Answer №1

It appears that the main issue lies in how you are resetting the value of selectedLabelDBSelection.

Instead of assigning "Please select DB" to selectedLabelDBSelection within your resetSelects() function, you should be updating the ngModel variable selectedLabel directly.

Modify your resetSelects() method to set the selectedLabel variable to "Please select DB", as shown below:

this.selectedLabel = 'Please select DB';

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