如何使用 patchValue 将值数组传递到一个多选列表视图中
How to pass array of values into one multi selection list view using patchValue
我面临一个问题,即使用反应形式的 patchvalue 方法将值数组传递到多选列表 (angular material)。
输入数组
list2=["BLUEBERRY","GRAPES","APPLE"];// the value that need to be selected in the list
列表中存在的元素(通过遍历数组list1)
list1 = ["PINEAPPLE","PAPAYA","BLUEBERRY","GRAPES","APPLE"];
多选列表
<mat-form-field>
<mat-select class="add_input" formControlName="menu" placeholder="Available Menus" multiple>
<mat-option *ngFor="let menus of list1" [value]="menus">{{menus}}</mat-option>
</mat-select>
补丁值函数为
this.form.patchValue(
{
location:this.gps,
menu: <-- how to pass the list2 element here(direct reference is not working)
}
)
仅供参考 - 反应式表单已使用 FormBuilder
初始化
试试这个:
this.form.patchValue({
location:this.gps,
menu: [...this.list2]
})
我面临一个问题,即使用反应形式的 patchvalue 方法将值数组传递到多选列表 (angular material)。
输入数组
list2=["BLUEBERRY","GRAPES","APPLE"];// the value that need to be selected in the list
列表中存在的元素(通过遍历数组list1)
list1 = ["PINEAPPLE","PAPAYA","BLUEBERRY","GRAPES","APPLE"];
多选列表
<mat-form-field>
<mat-select class="add_input" formControlName="menu" placeholder="Available Menus" multiple>
<mat-option *ngFor="let menus of list1" [value]="menus">{{menus}}</mat-option>
</mat-select>
补丁值函数为
this.form.patchValue(
{
location:this.gps,
menu: <-- how to pass the list2 element here(direct reference is not working)
}
)
仅供参考 - 反应式表单已使用 FormBuilder
初始化试试这个:
this.form.patchValue({
location:this.gps,
menu: [...this.list2]
})