极客教程Angular PrimeNG TreeTable方法
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。它提供了大量的模板、组件、主题设计、广泛的图标库等等。在这篇文章中，我们将看到Angular PrimeNG TreeTable方法。
TreeTable用于以表格形式显示分层的数据。方法是用来对TreeTable进行操作，并以有用的形式显示数据。
Angular PrimeNG TreeTable方法：
- reset()。它清除了排序和分页器的状态。
语法:
this.table.reset();
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 geeks_angular
第2步：在创建你的项目文件夹即geeks_angular之后，使用以下命令移动到它。
cd geeks_angular
第3步 。在你给定的目录中安装PrimeNG。
npm install primeng --save
npm install primeicons --save
项目结构：完成上述步骤后，项目结构将如下所示。
Project Structure
例子1：在下面的例子中，我们有一个带有Angular PrimeNG的重置按钮的TreeTable。
<h1 style="color: green; text-align:center;">GeeksforGeeks</h1>
<h3>Angular PrimeNG TreeTable Methods</h3>
<p-treeTable #treeTable [value]="tableData"
[columns]="cols">
<ng-template pTemplate="header" let-columns>
<tr>
<th *ngFor="let col of columns"
[ttSortableColumn]="col.field">
{{ col.header }}
<p-treeTableSortIcon [field]="col.field">
</p-treeTableSortIcon>
</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>
<p-button label="Reset It!" (onClick)="handleClick()"> </p-button>
import { Component, OnInit, ViewChild } from '@angular/core';
import { NodeService } from './nodeservice';
import { TreeNode } from 'primeng/api';
import { TreeTable } from 'primeng/treetable';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
})
export class AppComponent {
tableData: TreeNode[];
cols: any[];
@ViewChild('treeTable') table: TreeTable;
constructor(private nodeService: NodeService) { }
handleClick() {
this.table.reset();
}
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: '32',
},
children: [
{
data: {
name: 'H',
age: '20',
},
},
{
data: {
name: 'I',
age: '24',
},
},
],
},
{
data: {
name: 'J',
age: '64',
},
children: [
{
data: {
name: 'K',
age: '20',
},
},
{
data: {
name: 'L',
age: '24',
},
},
],
},
{
data: {
name: 'M',
age: '12',
},
children: [
{
data: {
name: 'N',
age: '20',
},
},
{
data: {
name: 'O',
age: '24',
},
},
],
},
{
data: {
name: 'P',
age: '34',
},
children: [
{
data: {
name: 'Q',
age: '20',
},
},
{
data: {
name: 'R',
age: '24',
},
},
],
},
{
data: {
name: 'S',
age: '43',
},
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';
import { ButtonModule } from 'primeng/button';
import { InputTextModule } from 'primeng/inputtext';
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
TreeTableModule,
ButtonModule,
InputTextModule,
HttpClientModule,
FormsModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService],
})
export class AppModule { }
输出:
例子2：在下面的例子中，我们使用Angular PrimeNG中的重置按钮清除过滤状态。
<h1 style="color: green;
text-align:center;">
GeeksforGeeks
</h1>
<h3>Angular PrimeNG TreeTable Methods</h3>
<p-treeTable #tt [value]="tableData"
[columns]="cols">
<ng-template pTemplate="caption">
<div style="text-align: right">
<i class="pi pi-search"
style="margin:4px 4px 0 0"></i>
<input type="text"
pInputText size="50"
placeholder="Global Filter"
(input)=
"tt.filterGlobal($event.target.value, 'contains')"
style="width:auto" />
</div>
</ng-template>
<ng-template pTemplate="header" let-columns>
<tr>
<th *ngFor="let col of cols">
{{ col.header }}
</th>
</tr>
<tr></tr>
</ng-template>
<ng-template pTemplate="body"
let-rowNode let-rowData="rowData">
<tr>
<td *ngFor="let col of cols; let i = index">
<p-treeTableToggler [rowNode]="rowNode"
*ngIf="i == 0">
</p-treeTableToggler>
{{ rowData[col.field] }}
</td>
</tr>
</ng-template>
</p-treeTable>
<p-button label="Reset It!"
(onClick)="handleClick()">
</p-button>
import { Component, OnInit, ViewChild }
from '@angular/core';
import { NodeService } from './nodeservice';
import { FilterMatchMode, TreeNode } from 'primeng/api';
import { TreeTable } from 'primeng/treetable';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
})
export class AppComponent {
tableData: TreeNode[];
cols: any[];
@ViewChild('tt') table: TreeTable;
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: '32',
},
children: [
{
data: {
name: 'H',
age: '20',
},
},
{
data: {
name: 'I',
age: '24',
},
},
],
},
{
data: {
name: 'J',
age: '64',
},
children: [
{
data: {
name: 'K',
age: '20',
},
},
{
data: {
name: 'L',
age: '24',
},
},
],
},
{
data: {
name: 'M',
age: '12',
},
children: [
{
data: {
name: 'N',
age: '20',
},
},
{
data: {
name: 'O',
age: '24',
},
},
],
},
{
data: {
name: 'P',
age: '34',
},
children: [
{
data: {
name: 'Q',
age: '20',
},
},
{
data: {
name: 'R',
age: '24',
},
},
],
},
{
data: {
name: 'S',
age: '43',
},
children: [
{
data: {
name: 'T',
age: '20',
},
},
{
data: {
name: 'U',
age: '24',
},
},
],
},
];
}
handleClick() {
this.table.reset();
this.table.filterGlobal('', FilterMatchMode.CONTAINS);
}
}
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';
import { ButtonModule } from 'primeng/button';
import { InputTextModule } from 'primeng/inputtext';
@NgModule({
imports: [
BrowserModule,
BrowserAnimationsModule,
TreeTableModule,
ButtonModule,
InputTextModule,
HttpClientModule,
FormsModule,
],
declarations: [AppComponent],
bootstrap: [AppComponent],
providers: [NodeService],
})
export class AppModule { }
输出:
