DataMaps (Angular)

In many situations, you may want columns to map values so cells display a value that is different from what is actually stored in the grid. You can accomplish this with the formatItem event, but the FlexGrid provides a better alternative: DataMaps.

If you set a column's dataMap property to an instance of a DataMap, the grid will use it to look up display values for each data item, and will provide a drop-down list with valid items to use when editing the cells.

Learn about FlexGrid | DataMaps Documentation | FlexGrid API Reference

本示例基于Angular

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; // import '@angular/compiler'; import { Component, enableProdMode, NgModule, ViewChild } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import * as wjcGrid from '@grapecity/wijmo.grid'; import { WjGridModule } from '@grapecity/wijmo.angular2.grid'; import { WjInputModule } from '@grapecity/wijmo.angular2.input'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: any[]; customerMap: wjcGrid.DataMap; countries = 'US,Germany,UK,Japan,Sweden,Norway,Denmark'.split(','); customers = [ { id: 0, name: 'Paul Perkins', address: '123 Main St' }, { id: 1, name: 'Susan Smith', address: '456 Grand Ave' }, { id: 2, name: 'Joan Jett', address: '789 Broad St' }, { id: 3, name: 'Don Davis', address: '321 Shattuck Ave' }, ]; @ViewChild('mainGrid', { static: true }) mainGrid: wjcGrid.FlexGrid; // DataSvc will be passed by derived classes constructor() { this.data = this._getData(); this.customerMap = new wjcGrid.DataMap(this.customers, 'id', 'name'); } dataMapGridInitialized(flexgrid: wjcGrid.FlexGrid) { flexgrid.rowEditEnded.addHandler(() => { let column = this.mainGrid.getColumn('customer'); if (column) { column.dataMap = new wjcGrid.DataMap(this.customers, 'id', 'name'); } this.mainGrid.refresh(); // update customer names on the main grid }); } private _getData() { let data = []; for (let i = 0; i < this.countries.length; i++) { data.push({ id: i, country: this.countries[i], customer: this.customers[i % this.customers.length].id, active: i % 5 != 0, downloads: Math.round(Math.random() * 200000), sales: Math.random() * 100000, expenses: Math.random() * 50000 }); } return data; } } // @NgModule({ imports: [WjGridModule, WjInputModule, BrowserModule], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Column DataMaps</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/fesm2015/zone.min.js"></script> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<div class="container-fluid"> <wj-flex-grid #mainGrid [(itemsSource)]="data"> <wj-flex-grid-column [header]="'Customer'" [binding]="'customer'" width="1.5*" [dataMap]="customerMap"></wj-flex-grid-column> <wj-flex-grid-column [header]="'Country'" [binding]="'country'" width="*" [dataMap]="countries"></wj-flex-grid-column> <wj-flex-grid-column [header]="'Downloads'" [binding]="'downloads'" width="*" format="n0"></wj-flex-grid-column> <wj-flex-grid-column [header]="'Sales'" [binding]="'sales'" width="*" format="n0"></wj-flex-grid-column> <wj-flex-grid-column [header]="'Expenses'" [binding]="'expenses'" width="*" format="n0"></wj-flex-grid-column> </wj-flex-grid> <p> And here is another grid showing all the customers. If you edit their names, you will see the change in the top grid:</p> <wj-flex-grid #dataMapGrid [(itemsSource)]="customers" (initialized)="dataMapGridInitialized(dataMapGrid)"></wj-flex-grid> </div>
.wj-flexgrid { max-height: 200px; margin: 12px 0; }
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