极客教程Angular PrimeNG TreeTable动态列
Angular PrimeNG是一个开源框架，拥有丰富的原生Angular UI组件，可用于出色的造型，该框架可用于制作响应式网站，非常方便。这篇文章将告诉我们如何在Angular PrimeNG中使用TreeTable动态列。
Angular PrimeNG TreeTable动态列是用来设置和渲染TreeTable组件的动态列的。有两种方法来呈现动态列，使用组件范围内的cols属性并将其绑定到ngFor指令，另一种方法是将cols数组绑定到columns属性，然后定义一个模板变量来在你的模板中访问它。
语法:
// In app.component.ts
this.cols = [
{
field: 'fieldName1',
header: 'headerName1'
},
{
field: 'fieldName2',
header: 'headerName2'
},
];
// In app.component.html
<p-treeTable>
<ng-template pTemplate="header" let-columns>
<tr>
<th *ngFor="let col of columns">
{{ col.header }}
</th>
</tr>
</ng-template>
</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：创建你的项目文件夹即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。
实例1：下面是一个简单的例子，演示了Angular PrimeNG TreeTable动态列的使用。在这个例子中，我们将cols绑定到[column]属性上，并动态地渲染这些列。
<h2 style="color: green">
GeeksforGeeks
</h2>
<h4>
Angular PrimeNG TreeTable Dynamic Columns
</h4>
<p-treeTable
[columns]="cols"
[value]="tableData"
[scrollable]="true"
[virtualScroll]
[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:
例子2：下面是另一个例子，演示了Angular PrimeNG TreeTable动态列的使用。在这个例子中，我们使用app.component.ts组件的cols属性来动态地呈现列。
<h2 style="color: green">
GeeksforGeeks
</h2>
<h4>
Angular PrimeNG TreeTable Dynamic Columns
</h4>
<p-treeTable
[value]="tableData"
[scrollable]="true"
[virtualScroll]
[virtualRowHeight]="30"
>
<ng-template pTemplate="header" let-columns>
<tr [ttRow]="rowNode">
<th *ngFor="let col of cols">
{{ col.header }}
</th>
</tr>
</ng-template>
<ng-template
pTemplate="body"
let-rowNode
let-rowData="rowData"
let-columns="columns"
>
<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>
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: 'K',
age: '40',
},
children: [
{
data: {
name: 'B',
age: '16',
},
},
{
data: {
name: 'C',
age: '14',
},
},
],
},
{
data: {
name: 'J',
age: '55',
},
children: [
{
data: {
name: 'E',
age: '20',
},
},
{
data: {
name: 'F',
age: '24',
},
},
],
},
{
data: {
name: 'Q',
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:
