如何从另一个组件更新 mat-autocomplete 选项?
How to update mat-autocomplete options from another component?
我的应用程序中有两个组件,名为 Employee 和 Form。 EmployeeComponent 中有 2 个 mat-autocomplete:State 和 City 列表。我使用“formData”参数填充这些 mat-autocomplete 控件并将其传递给 FormComponent:
员工构成:
html
<form #form [formData]="formControls"></app-form>
ts
formControls = [];
states: StateDto[] = [];
cities: CityDto[] = [];
// fill employee list
getStates() {
this.demoService.getStates().subscribe((data: StateDto) => {
this.states = data;
});
}
getCities() {
this.demoService.getCities().subscribe((data: CityDto) => {
this.cities = data;
});
}
// create for data array
this.formData = [
{
id: 'states',
type: 'custom-autocomplete',
},
{
id: 'cities',
type: 'custom-autocomplete',
}
]
// set form control's list data
this.formControls = this.formData.map(item => {
if (item.id === 'states') {
item.options = this.states;
}
else if (item.id === 'cities') {
item.options = this.cities;
}
return item;
});
表单组件:
html
@Input() formData = [];
options = {};
ngOnInit() {
//code omitted for brevity
this.autocompleteControl.forEach(item => {
// here I set each autocomplete's options
this.options[item.id] = item.options;
});
}
此时,当我 select 一个州时,我希望城市列表被清除并由 selected 州的城市填充。那么,我应该在哪里管理呢?在 EmployeeComponent 上还是在 FormComponent 上?我应该用优雅的解决方案设置城市列表选项吗?
首先,你使用2 mat-autocomplete。这意味着相同的功能和行为。在这种情况下,我更愿意为该部分使用可重用的组件。
html 在父组件中
@Component({
selector: 'app-custom',
template: "<div *ngFor='let a of data'>{{a}}</div>",
})
export class CustomComponent {
@Input() data: string[] = [];
}
html 在父组件中
<div>
<h1>City</h1>
<app-custom [data]="city"></app-custom>
</div>
<div>
<h1>State</h1>
<app-custom [data]="state"></app-custom>
</div>
父组件中的ts
export class AppComponent {
city: string[] = ['A', 'B', 'C'];
state: string[] = ['AAA', 'BBB', 'CSS'];
}
我的应用程序中有两个组件,名为 Employee 和 Form。 EmployeeComponent 中有 2 个 mat-autocomplete:State 和 City 列表。我使用“formData”参数填充这些 mat-autocomplete 控件并将其传递给 FormComponent:
员工构成:
html
<form #form [formData]="formControls"></app-form>
ts
formControls = [];
states: StateDto[] = [];
cities: CityDto[] = [];
// fill employee list
getStates() {
this.demoService.getStates().subscribe((data: StateDto) => {
this.states = data;
});
}
getCities() {
this.demoService.getCities().subscribe((data: CityDto) => {
this.cities = data;
});
}
// create for data array
this.formData = [
{
id: 'states',
type: 'custom-autocomplete',
},
{
id: 'cities',
type: 'custom-autocomplete',
}
]
// set form control's list data
this.formControls = this.formData.map(item => {
if (item.id === 'states') {
item.options = this.states;
}
else if (item.id === 'cities') {
item.options = this.cities;
}
return item;
});
表单组件:
html
@Input() formData = [];
options = {};
ngOnInit() {
//code omitted for brevity
this.autocompleteControl.forEach(item => {
// here I set each autocomplete's options
this.options[item.id] = item.options;
});
}
此时,当我 select 一个州时,我希望城市列表被清除并由 selected 州的城市填充。那么,我应该在哪里管理呢?在 EmployeeComponent 上还是在 FormComponent 上?我应该用优雅的解决方案设置城市列表选项吗?
首先,你使用2 mat-autocomplete。这意味着相同的功能和行为。在这种情况下,我更愿意为该部分使用可重用的组件。
html 在父组件中
@Component({
selector: 'app-custom',
template: "<div *ngFor='let a of data'>{{a}}</div>",
})
export class CustomComponent {
@Input() data: string[] = [];
}
html 在父组件中
<div>
<h1>City</h1>
<app-custom [data]="city"></app-custom>
</div>
<div>
<h1>State</h1>
<app-custom [data]="state"></app-custom>
</div>
父组件中的ts
export class AppComponent {
city: string[] = ['A', 'B', 'C'];
state: string[] = ['AAA', 'BBB', 'CSS'];
}