极客教程Angular PrimeNG带有模板、过滤和清除图标组件的表格下拉高级版
Angular PrimeNG是一个开源的框架，有丰富的原生Angular UI组件，用来做很好的造型，这个框架用来做响应式的网站，非常方便。在这篇文章中，我们将知道如何在Angular ngx bootstrap中使用日历组件。
带有模板、过滤和清除图标组件的高级下拉：这种类型的下拉是高级的，我们将在其中使用模板、过滤和清除图标。
语法:
<p-dropdown [filter]="true" filterBy="name">
<ng-template pTemplate="selectedItem">
</ng-template>
<ng-template let-country pTemplate="item">
</ng-template>
</p-dropdown>
创建Angular应用程序和模块安装。
第1步：使用以下命令创建一个Angular应用程序。
ng new appname
第2步：创建你的项目文件夹即appname后，使用以下命令移动到它。
cd appname
第3步：在你给定的目录中安装PrimeNG。
npm install primeng --save
npm install primeicons --save
Project Structure:
示例1：在下面的代码中，我们将使用上述语法来演示Angular PrimeNG Form Dropdown Advanced with Templating, Filtering and Clear Icon Component的使用。
app.component.html
<div style="text-align:center;">
<h1 style="color:green;">GeeksforGeeks</h1>
<h3>A computer science portal for geeks</h3>
<h4>
Angular PrimeNG Form Dropdown
Advanced with Templating,
Filtering and Clear Icon Component
</h4>
<h5>Filtering</h5>
<p-dropdown
[options]="items"
[(ngModel)]="item"
placeholder="Select Item"
[virtualScroll]="true"
[itemSize]="31"
[filter]="false"
></p-dropdown>
</div>
app.component.ts
import { Component } from '@angular/core';
import {MenuItem} from 'primeng/api';
import {SelectItem} from 'primeng/api';
import {SelectItemGroup} from 'primeng/api';
interface City {
name: string,
code: string
}
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss']
})
export class AppComponent {
cities: City[];
selectedCity1: City;
selectedCity2: City;
selectedCity3: string;
selectedCountry: string;
countries: any[];
groupedCities: SelectItemGroup[];
items: SelectItem[];
item: string;
constructor() {
this.items = [];
for (let i = 0; i < 10000; i++) {
this.items.push({label: 'Item ' + i, value: 'Item ' + i});
}
this.cities = [
{name: 'India', code: 'NY'},
{name: 'Rome', code: 'RM'},
{name: 'London', code: 'LDN'},
{name: 'Istanbul', code: 'IST'},
{name: 'Paris', code: 'PRS'}
];
this.groupedCities = [
{
label: 'India', value: 'IND',
items: [
{label: 'Mumbai', value: 'Mumbai'},
{label: 'Varanasi', value: 'Varanasi'},
{label: 'Nashik', value: 'Nashik'},
{label: 'Delhi', value: 'Delhi'}
]
},
{
label: 'USA', value: 'us',
items: [
{label: 'Chicago', value: 'Chicago'},
{label: 'Los Angeles', value: 'Los Angeles'},
{label: 'New York', value: 'New York'},
{label: 'San Francisco', value: 'San Francisco'}
]
},
{
label: 'Japan', value: 'jp',
items: [
{label: 'Kyoto', value: 'Kyoto'},
{label: 'Osaka', value: 'Osaka'},
{label: 'Tokyo', value: 'Tokyo'},
{label: 'Yokohama', value: 'Yokohama'}
]
}
];
this.countries = [
{name: 'Australia', code: 'AU'},
{name: 'Brazil', code: 'BR'},
{name: 'China', code: 'CN'},
{name: 'Egypt', code: 'EG'},
{name: 'France', code: 'FR'},
{name: 'Germany', code: 'DE'},
{name: 'India', code: 'IN'},
{name: 'Japan', code: 'JP'},
{name: 'Spain', code: 'ES'},
{name: 'United States', code: 'US'}
];
}
}
app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { DropdownModule } from 'primeng/dropdown';
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
DropdownModule,
FormsModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
app.component.scss
:host ::ng-deep .p-dropdown {
width: 14rem;
}
输出:
示例2：在下面的代码中，我们将使用上述语法来演示Angular PrimeNG Form Dropdown Advanced与模板、过滤和清除图标组件的使用。
app.component.html
<div style="text-align:center;">
<h1 style="color:green;">GeeksforGeeks</h1>
<h3>A computer science portal for geeks</h3>
<h4>
Angular PrimeNG Form Dropdown
Advanced with Templating,
Filtering and Clear Icon Component
</h4>
<h5>
Advanced with Templating, Filtering and Clear Icon
</h5>
<p-dropdown
[options]="countries"
[(ngModel)]="selectedCountry"
optionLabel="name"
[filter]="true"
filterBy="name"
[showClear]="true"
placeholder="Select a Country"
>
<ng-template pTemplate="selectedItem">
<div class="country-item country-item-value"
*ngIf="selectedCountry">
<div>{{ selectedCountry.name }}</div>
</div>
</ng-template>
<ng-template let-country pTemplate="item">
<div class="country-item">
<div>{{ country.name }}</div>
</div>
</ng-template>
</p-dropdown>
</div>
app.component.ts
import { Component } from '@angular/core';
import {MenuItem} from 'primeng/api';
import {SelectItem} from 'primeng/api';
import {SelectItemGroup} from 'primeng/api';
interface City {
name: string,
code: string
}
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.scss']
})
export class AppComponent {
cities: City[];
selectedCity1: City;
selectedCity2: City;
selectedCity3: string;
selectedCountry: string;
countries: any[];
groupedCities: SelectItemGroup[];
items: SelectItem[];
item: string;
constructor() {
this.items = [];
for (let i = 0; i < 10000; i++) {
this.items.push({label: 'Item ' + i, value: 'Item ' + i});
}
this.cities = [
{name: 'India', code: 'NY'},
{name: 'Rome', code: 'RM'},
{name: 'London', code: 'LDN'},
{name: 'Istanbul', code: 'IST'},
{name: 'Paris', code: 'PRS'}
];
this.groupedCities = [
{
label: 'India', value: 'IND',
items: [
{label: 'Mumbai', value: 'Mumbai'},
{label: 'Varanasi', value: 'Varanasi'},
{label: 'Nashik', value: 'Nashik'},
{label: 'Delhi', value: 'Delhi'}
]
},
{
label: 'USA', value: 'us',
items: [
{label: 'Chicago', value: 'Chicago'},
{label: 'Los Angeles', value: 'Los Angeles'},
{label: 'New York', value: 'New York'},
{label: 'San Francisco', value: 'San Francisco'}
]
},
{
label: 'Japan', value: 'jp',
items: [
{label: 'Kyoto', value: 'Kyoto'},
{label: 'Osaka', value: 'Osaka'},
{label: 'Tokyo', value: 'Tokyo'},
{label: 'Yokohama', value: 'Yokohama'}
]
}
];
this.countries = [
{name: 'Australia', code: 'AU'},
{name: 'Brazil', code: 'BR'},
{name: 'China', code: 'CN'},
{name: 'Egypt', code: 'EG'},
{name: 'France', code: 'FR'},
{name: 'Germany', code: 'DE'},
{name: 'India', code: 'IN'},
{name: 'Japan', code: 'JP'},
{name: 'Spain', code: 'ES'},
{name: 'United States', code: 'US'}
];
}
}
app.module.ts
代码 block
app.component.scss
:host ::ng-deep .p-dropdown {
width: 14rem;
}
输出:
