极客教程Angular PrimeNG TreeTable 虚拟滚动
Angular PrimeNG是一个开源框架，它有丰富的原生Angular UI组件，可以用来做很好的造型，这个框架用来做响应式网站，非常方便。在这篇文章中，我们将看到如何在Angular PrimeNG中使用TreeTable虚拟滚动。
Angular PrimeNG TreeTable Virtual Scrolling用于在TreeTable组件中启用虚拟滚动。VirtualScroller是一种有效处理数据的方法。
语法:
<p-treeTable
[virtualScroll]>
</p-treeTable>
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：在完成你的项目文件夹即appname后，使用以下命令移动到它。
cd appname
步骤3：在你给定的目录中安装PrimeNG。
npm install primeng --save
npm install primeicons --save
项目结构：它将看起来像如下。
运行以下命令：
ng serve --open
例子1：下面是一个简单的例子，演示了Angular PrimeNG TreeTable虚拟滚动的使用。
<p-treeTable
[value]="tableData"
[scrollable]="true"
[virtualScroll]
scrollHeight="250px"
[virtualRowHeight]="30"
>
<ng-template pTemplate="header">
<tr>
<th>Name</th>
<th>Age</th>
</tr>
</ng-template>
<ng-template pTemplate="body"
let-rowNode let-row="rowData">
<tr [ttRow]="rowNode">
<td>
<p-treeTableToggler
[rowNode]="rowNode">
</p-treeTableToggler>
{{ row.name }}
</td>
<td>{{ row.age }}</td>
</tr>
</ng-template>
</p-treeTable>
import { Component, OnInit } from '@angular/core';
import { NodeService } from './nodeservice';
import { TreeNode } from 'primeng/api';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
})
export class AppComponent {
tableData: TreeNode[];
constructor(private nodeService: NodeService) {}
ngOnInit() {
this.tableData = [
{
data: {
name: 'David',
age: '40',
},
children: [
{
data: {
name: 'Nathan',
age: '16',
},
},
{
data: {
name: 'Shane',
age: '14',
},
},
],
},
{
data: {
name: 'Warner',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'Max',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'Willy',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'Miley',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'Sam',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
{
data: {
name: 'James',
age: '55',
},
children: [
{
data: {
name: 'Michelle',
age: '20',
},
},
{
data: {
name: 'Charlie',
age: '24',
},
},
],
},
];
}
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule }
from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { NodeService } from './nodeservice';
import { TreeTableModule } from 'primeng/treetable';
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
TreeTableModule,
HttpClientModule,
FormsModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService],
})
export class AppModule {}
输出:
例子2：下面是另一个例子，演示了Angular PrimeNG TreeTable虚拟滚动的使用。
<p-treeTable
[columns]="cols"
[value]="tableData"
[scrollable]="true"
[virtualScroll]
scrollHeight="250px"
[virtualRowHeight]="30"
>
<ng-template pTemplate="header" let-columns>
<tr [ttRow]="rowNode">
<th *ngFor="let col of columns">
{{ col.header }}
</th>
</tr>
</ng-template>
<ng-template
pTemplate="body"
let-rowNode
let-rowData="rowData"
let-columns="columns"
>
<tr>
<td *ngFor="let col of columns; let i = index">
<p-treeTableToggler
[rowNode]="rowNode"
*ngIf="i == 0"
></p-treeTableToggler>
{{ rowData[col.field] }}
</td>
</tr>
</ng-template>
</p-treeTable>
import { Component, OnInit } from '@angular/core';
import { NodeService } from './nodeservice';
import { TreeNode } from 'primeng/api';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
})
export class AppComponent {
tableData: TreeNode[];
cols: any[];
constructor(private nodeService: NodeService) {}
ngOnInit() {
this.cols = [
{ field: 'name', header: 'First Name' },
{ field: 'age', header: 'Age' },
];
this.tableData = [
{
data: {
name: 'A',
age: '40',
},
children: [
{
data: {
name: 'B',
age: '16',
},
},
{
data: {
name: 'C',
age: '14',
},
},
],
},
{
data: {
name: 'D',
age: '55',
},
children: [
{
data: {
name: 'E',
age: '20',
},
},
{
data: {
name: 'F',
age: '24',
},
},
],
},
{
data: {
name: 'G',
age: '55',
},
children: [
{
data: {
name: 'H',
age: '20',
},
},
{
data: {
name: 'I',
age: '24',
},
},
],
},
{
data: {
name: 'J',
age: '55',
},
children: [
{
data: {
name: 'K',
age: '20',
},
},
{
data: {
name: 'L',
age: '24',
},
},
],
},
{
data: {
name: 'M',
age: '55',
},
children: [
{
data: {
name: 'N',
age: '20',
},
},
{
data: {
name: 'O',
age: '24',
},
},
],
},
{
data: {
name: 'P',
age: '55',
},
children: [
{
data: {
name: 'Q',
age: '20',
},
},
{
data: {
name: 'R',
age: '24',
},
},
],
},
{
data: {
name: 'S',
age: '55',
},
children: [
{
data: {
name: 'T',
age: '20',
},
},
{
data: {
name: 'U',
age: '24',
},
},
],
},
];
}
}
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule }
from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { NodeService } from './nodeservice';
import { TreeTableModule } from 'primeng/treetable';
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
TreeTableModule,
HttpClientModule,
FormsModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService],
})
export class AppModule {}
输出:
