问题
I have done a simple CRUD application, now I have to add a Search Bar that filters my table and show me the rows with the same letters that I digit.
I don't know what to do in my component, I saw different things with pipes and filter but I couldn't adapt them to my project.
I would like to know if there is a method that I can implement to my component.ts without creating a new one.
COMPONENT.HTML
<div class="container">
<ul class="table-wrapper">
<div class="table-title">
<div class="row">
<div class="col-sm-4">
<button *ngIf="metadata && metadata.addMD" (click)="addFunc(metadata)">{{metadata.addMD.label}}</button>
<div class="show-entries">
<span>Show</span>
<label>
<select [(ngModel)]="pageSize">
<option *ngFor="let maxPerPage of rowsOnPageSet"
(click)="maxElements(maxPerPage)">{{maxPerPage}}</option>
</select>
</label>
<span>users</span>
</div>
</div>
<div class="col-sm-4">
<h2 class="text-center">Users <b>Details</b></h2>
</div>
<div class="col-sm-4">
<div class="search-box">
<div class="input-group">
<span class="input-group-addon"><i class="material-icons"></i></span>
--> //HERE I HAVE TO ADD THE FUNCTION OR SOMETHING ELSE
<input type="text" class="form-control" [(ngModel)]="searchVal"
(ngModelChange)='checkSearchVal()' placeholder="Search…">
</div>
</div>
</div>
</div>
</div>
<table class="table table-bordered">
<thead>
<tr>
<th *ngFor="let col of columns" (click)="sortTable(col)">{{col}}
<i *ngIf="col === columnSorted && !direction" class="material-icons">keyboard_arrow_up</i>
<i *ngIf="col === columnSorted && direction" class="material-icons">keyboard_arrow_down</i>
</th>
<th>Actions</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let user of users | paginate: {itemsPerPage: pageSize,
currentPage: page,
totalItems: users.length}">
<td *ngFor="let col of columns">{{user[col]}}</td>
<td>
<button [ngClass]="getClassCondition(act.actionType)" *ngFor="let act of actions"
(click)="actionFunc(act, user)">{{act.label}}</button>
</td>
</tr>
</tbody>
</table>
<div align="center">
<!--<div class="hint-text">Showing <b>{{totUsersPerPage}}</b> out of <b>{{users.length}}</b> entries</div>-->
<ul align="center">
<pagination-controls (pageChange)="pageChanged($event)"></pagination-controls>
</ul>
</div>
</ul>
</div>
COMPONENT.TS, here I have to create the right method that works for my app.
export class DynamicTableComponent implements OnInit {
constructor(private userService: UserService,
private resourcesService: ResourcesService,
private router: Router) {
}
@Input()
users = [];
@Input()
columns: string[];
@Input()
actions = [];
@Input()
metadata: any;
@Input()
class;
direction = false;
columnSorted = '';
public rowsOnPageSet = ['5', '10', '15', '20', '25'];
page = 1;
private pageSize = 5;
searchVal = '';
/*totalPages = Math.trunc(this.users.length / this.pageSize);
totUsersPerPage = this.pageSize;*/
ngOnInit() {
}
actionFunc(action, element: any) {
if (action.actionType === 'DELETE') {
/*...*/
}
}
if (action.actionType === 'GO_TO') {
/*...*/
}
}
addFunc(metadata) {
if (metadata.addMD.actionType === 'ADD_TO') {
/*...*/
}
}
maxElements(maxPerPage) {
this.rowsOnPageSet = maxPerPage;
}
sortTable(param) {
/*...*/
}
getClassCondition(act) {
return act === 'DELETE' ? this.class = 'btn btn-danger' : 'btn btn-primary';
}
pageChanged($event: number) {
/*...*/
}
checkSearchVal() {
this.users.slice();
const filteredUsers: User[] = [];
if (this.searchVal && this.searchVal !== '') {
for (const selectedUser of this.users) {
if (selectedUser.firstName.toLowerCase().search(this.searchVal.toLowerCase()) !== -1 ||
selectedUser.lastName.toLowerCase().search(this.searchVal.toLowerCase()) !== -1) {
filteredUsers.push(selectedUser);
}
}
this.users = filteredUsers.slice();
}
}
}
DATA STRUCTURE: in.memory-data.service.ts
import { InMemoryDbService } from 'angular-in-memory-web-api';
import { User } from './user';
import { Injectable } from '@angular/core';
export const COLUMNS = ['id', 'firstName', 'lastName', 'age'];
@Injectable({
providedIn: 'root',
})
export class InMemoryDataService implements InMemoryDbService {
createDb() {
const USERS = [
{id: 1, firstName: 'Sergio', lastName: 'Rios', age: 23},
{id: 2, firstName: 'Alessandro', lastName: 'Amodeo', age: 23},
{id: 3, firstName: 'Antonio', lastName: 'Vitolo', age: 23},
{id: 4, firstName: 'Andrea', lastName: 'Bellati', age: 24},
{id: 5, firstName: 'Yvette', lastName: 'Arevalo Godier', age: 42},
{id: 6, firstName: 'Federico', lastName: 'Belloni', age: 41},
{id: 7, firstName: 'Claudio', lastName: 'Tornese', age: 24},
{id: 8, firstName: 'Diana', lastName: 'Budascu', age: 25},
{id: 9, firstName: 'Veronica', lastName: 'Moreira', age: 25},
{id: 10, firstName: 'Sirak', lastName: 'Guida', age: 25},
{id: 11, firstName: 'Marina', lastName: 'Righetti', age: 22},
{id: 12, firstName: 'Giorgia', lastName: 'Secchi', age: 22},
{id: 13, firstName: 'Simone', lastName: 'Bocallari', age: 24},
];
return {USERS};
}
}
user.ts
export class User {
id: number;
firstName: string;
lastName: string;
age: number;
}
回答1:
I saw that you got your answer... here is another approach for what it is worth... as discussed in the comments...
checkSearchVal() {
this.USERS = masterUSERS.slice();
let filteredUsers: User[] = [];
if (this.searchVal && this.searchVal != '') {
/* NORMAL FOR
for(var i=0; i<this.USERS.length; i++ ){
if(this.USERS[i].firstName.toLowerCase().search(this.searchVal.toLowerCase()) != -1 || this.USERS[i].lastName.toLowerCase().search(this.searchVal.toLowerCase()) != -1 ){
filteredUsers.push(this.USERS[i])
}
}
*/
/* FOR EACH
this.USERS.forEach((selectedUser) => {
if (selectedUser.firstName.toLowerCase().search(this.searchVal.toLowerCase()) != -1 ||
selectedUser.lastName.toLowerCase().search(this.searchVal.toLowerCase()) != -1) {
filteredUsers.push(selectedUser);
}
})
*/
/* FOR OF */
for (let selectedUser of this.USERS) {
if (selectedUser.firstName.toLowerCase().search(this.searchVal.toLowerCase()) != -1 ||
selectedUser.lastName.toLowerCase().search(this.searchVal.toLowerCase()) != -1) {
filteredUsers.push(selectedUser);
}
}
this.USERS = filteredUsers.slice();
}
}
update: moved the this.USERS = filteredUsers.slice(); inside the IF
update:2: same code with forEach and For-Of (to get rid of the TSLint error)
回答2:
Just create a PIPE.ts file to filter the table:
import { Pipe, PipeTransform } from '@angular/core';
@Pipe({
name: 'filterAll'
})
export class FilterPipe implements PipeTransform {
transform(value: any, searchText: any): any {
if(!searchText) {
return value;
}
return value.filter((data) => this.matchValue(data,searchText));
}
matchValue(data, value) {
return Object.keys(data).map((key) => {
return new RegExp(value, 'gi').test(data[key]);
}).some(result => result);
}
}
Add the FilterPipe to app.module.ts in declarations and add this to your component.html:
<form id="searchForm">
<div class="form-group">
<div class="input-group" id="filterAll">
<div class="input-group-addon"><i class="glyphicon glyphicon-search"></i></div>
<input type="text" class="form-control" name="searchString" placeholder="Search..." [(ngModel)]="searchString">
</div>
</div>
</form>
then you add a pipe to the TR of your table like this:
<tr *ngFor="let user of users | paginate: {itemsPerPage: pageSize,
currentPage: page,
totalItems: users.length} | filterAll: searchString">
I forgot about the component.ts file sorry: You need to put the searchString variable as:
public searchString: string;
来源：https://stackoverflow.com/questions/55060545/angular-search-bar-in-typescript-table