Question

<select class="form-control" formControlName="recipe_ingredient">
          <option value="">Select Ingredient</option>
          <option *ngFor="let ingredient of ingredients | async" [value]="ingredient.id" [selected]="ingredient.id == ri.ingredient">
           {{ingredient.id}}-{{ingredient.name}}
          </option>

ri.ingredient = 2;但是，下面的代码在以下代码中未返回true，因此未选择值

ingredient.id == ri.ingredient

任何人都可以指导

我的ts文件中的代码如下：

editRecipeForm() {
    this.editrecipeForm = this.fb.group({
      recipe_name: ['', Validators.required ],
      recipe_description: ['', Validators.required ],
      edit_recipe_image: [],
      ingredients11: this.fb.array([
         this.getIngredient()
      ])
   });
  } 12:49 
getIngredient() {
    return this.fb.group({
     recipe_ingredient: ['', Validators.required ],
      recipe_ingredient_quantity: ['', Validators.required ]
    });
  }

Answer 1

我认为您所需要的只是ngModel标签中的select：

<select class="form-control" formControlName="recipe_ingredient" [(ngModel)]="ri.ingredient">

WORKING DEMO

角度-在下拉菜单中设置选定的值

1 个答案: