自定义

FlexGrid列具有汇总属性,可以显示整个表格或每个组的数据摘要.

然而,在某些情况下,汇总属性不够灵活,您可能需要使用自定义代码计算汇总.

以下表格包含“利润”列,显示“销售”和“费用”之间的差异.

'Profit'列在 formatItem 事件中计算。 常规数据项目的利润基于实际数据项目。 使用组的 getAggregate 方法计算组的利润.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjCore from '@grapecity/wijmo'; import * as wjGrid from '@grapecity/wijmo.grid'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // generate some random data var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), products = 'Phones,Computers,Cameras,Stereos'.split(','), data = []; for (var i = 0; i < 200; i++) { data.push({ id: i, country: countries[i % countries.length], product: products[i % products.length], sales: Math.random() * 10000, expenses: Math.random() * 5000, }); } // // create a group to show the grand totals var grandTotalsGroup = new wjCore.PropertyGroupDescription('Grand Total', function (item, propName) { return ''; }); // // grid with custom aggregates var theGrid = new wjGrid.FlexGrid('#theGrid', { autoGenerateColumns: false, columns: [ { binding: 'id', header: 'ID', width: 60, isReadOnly: true }, { binding: 'country', header: 'Country' }, { binding: 'product', header: 'Product' }, { binding: 'sales', header: 'Sales', aggregate: 'Sum' }, { binding: 'expenses', header: 'Expenses', aggregate: 'Sum' }, { binding: 'profit', header: 'Profit', dataType: 'Number', isReadOnly: true } ], itemsSource: new wjCore.CollectionView(data, { groupDescriptions: [ grandTotalsGroup, 'country' ] }) }); // // start collapsed theGrid.collapseGroupsToLevel(1); // // custom cell calculation theGrid.formatItem.addHandler(function (s, e) { // // cells and column footer panels only if (e.panel == s.cells) { // // get row, column, and data item (or group description) var r = s.rows[e.row]; var c = s.columns[e.col]; var item = s.rows[e.row].dataItem; var group = r instanceof wjGrid.GroupRow ? item : null; // // assume value is not negative var negative = false; // // calculate profit if (c.binding == 'profit') { var profit = group ? group.getAggregate('Sum', 'sales') - group.getAggregate('Sum', 'expenses') : item.sales - item.expenses; e.cell.textContent = wjCore.Globalize.format(profit, c.format); negative = profit < 0; } // // update 'negative' class on cell wjCore.toggleClass(e.cell, 'negative', negative); } // }); } <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid Custom Aggregation</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div class="container-fluid"> <div id="theGrid"> </div> </div> </body> </html> .wj-flexgrid { max-height: 250px; margin: 10px 0; } .wj-cell.wj-frozen-row { border-bottom: none; } .negative { color: red; } body { margin-bottom: 20px; } import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import { Component, enableProdMode, NgModule } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjGridModule } from '@grapecity/wijmo.angular2.grid'; import * as wjcCore from '@grapecity/wijmo'; import * as wjcGrid from '@grapecity/wijmo.grid'; @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: wjcCore.CollectionView; // DataSvc will be passed by derived classes constructor() { this.data = new wjcCore.CollectionView(this._getData(), { groupDescriptions: [ new wjcCore.PropertyGroupDescription('Grand Total', () => { return ''; }), 'country' ] }); } initializeGrid(flex: wjcGrid.FlexGrid) { // start collapsed flex.collapseGroupsToLevel(1); // custom cell calculation flex.formatItem.addHandler((s: wjcGrid.FlexGrid, e: wjcGrid.FormatItemEventArgs) => { // cells and column footer panels only if (e.panel == s.cells) { // get row, column, and data item (or group description) let r = s.rows[e.row], c = s.columns[e.col], item = s.rows[e.row].dataItem, group = r instanceof wjcGrid.GroupRow ? item : null, negative = false; // assume value is not negative // calculate profit if (c.binding == 'profit') { let profit = group ? group.getAggregate('Sum', 'sales') - group.getAggregate('Sum', 'expenses') : item.sales - item.expenses; e.cell.textContent = wjcCore.Globalize.format(profit, c.format); negative = profit < 0; } // update 'negative' class on cell wjcCore.toggleClass(e.cell, 'negative', negative); } }); } private _getData() { // create some random data let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), products = 'Phones,Computers,Cameras,Stereos'.split(','), data = []; for (let i = 0; i < 200; i++) { data.push({ id: i, country: countries[i % countries.length], product: products[i % products.length], sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } return data; } } @NgModule({ imports: [WjGridModule, 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>GrapeCity Wijmo FlexGrid Custom Aggregation</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/dist/zone.min.js"></script> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.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"> <!-- the grid --> <wj-flex-grid #flex [(itemsSource)]="data" (initialized)="initializeGrid(flex)"> <wj-flex-grid-column [binding]="'id'" [header]="'ID'" [width]="60" [isReadOnly]="true"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'country'" [header]="'Country'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'product'" [header]="'Product'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'sales'" [header]="'Sales'" [aggregate]="'Sum'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'expenses'" [header]="'Expenses'" [aggregate]="'Sum'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'profit'" [header]="'Profit'" [dataType]="number" [isReadOnly]="true"></wj-flex-grid-column> </wj-flex-grid> </div> .wj-flexgrid { max-height: 250px; margin: 10px 0; } .wj-cell.wj-frozen-row { border-bottom: none; } .negative { color: red; } body { margin-bottom: 20px; } <template> <div class="container-fluid"> <wj-flex-grid :itemsSource="data" :initialized="initializedGrid"> <wj-flex-grid-column binding="id" header="ID" :width=60 :isReadOnly=true></wj-flex-grid-column> <wj-flex-grid-column binding="country" header="Country"></wj-flex-grid-column> <wj-flex-grid-column binding="product" header="Product"></wj-flex-grid-column> <wj-flex-grid-column binding="sales" header="Sales" aggregate="Sum"></wj-flex-grid-column> <wj-flex-grid-column binding="expenses" header="Expenses" aggregate="Sum"></wj-flex-grid-column> <wj-flex-grid-column binding="profit" header="Profit" :dataType=2 :isReadOnly=true></wj-flex-grid-column> </wj-flex-grid> </div> </template> <script> import "@grapecity/wijmo.styles/wijmo.css"; import "bootstrap.css"; import Vue from "vue"; import "@grapecity/wijmo.vue2.grid"; import * as wjcGrid from '@grapecity/wijmo.grid'; import * as wjcCore from '@grapecity/wijmo'; import { getData } from "./data"; new Vue({ el: "#app", data: function() { return { data: new wjcCore.CollectionView(getData(), { groupDescriptions: [ new wjcCore.PropertyGroupDescription('Grand Total', () => { return ''; }), 'country' ] }) }; }, methods:{ initializedGrid(flex){ // start collapsed flex.collapseGroupsToLevel(1); // custom cell calculation flex.formatItem.addHandler((s, e) => { // cells and column footer panels only if (e.panel == s.cells) { // get row, column, and data item (or group description) let r = s.rows[e.row], c = s.columns[e.col], item = s.rows[e.row].dataItem, group = r instanceof wjcGrid.GroupRow ? item : null, negative = false; // assume value is not negative // calculate profit if (c.binding == 'profit') { let profit = group ? group.getAggregate('Sum', 'sales') - group.getAggregate('Sum', 'expenses') : item.sales - item.expenses; e.cell.textContent = wjcCore.Globalize.format(profit, c.format); negative = profit < 0; } // update 'negative' class on cell wjcCore.toggleClass(e.cell, 'negative', negative); } }); } } }); </script> <style> .wj-flexgrid { max-height: 250px; margin: 10px 0; } .wj-cell.wj-frozen-row { border-bottom: none; } .negative { color: red; } body { margin-bottom: 20px; } </style> <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>AutoComplete</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app.vue'); </script> </head> <body> <div id="app"> </div> </body> </html> export function getData() { // create some random data let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), products = 'Phones,Computers,Cameras,Stereos'.split(','), data = []; for (let i = 0; i < 200; i++) { data.push({ id: i, country: countries[i % countries.length], product: products[i % products.length], sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } return data; } import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './app.css'; // import * as React from 'react'; import * as ReactDOM from 'react-dom'; import * as wjGrid from '@grapecity/wijmo.react.grid'; import * as wjcGrid from '@grapecity/wijmo.grid'; import * as wjcCore from '@grapecity/wijmo'; import { getData } from './data'; class App extends React.Component { constructor(props) { super(props); this.state = { data: new wjcCore.CollectionView(getData(), { groupDescriptions: [ new wjcCore.PropertyGroupDescription('Grand Total', () => { return ''; }), 'country' ] }) }; } render() { return <div className="container-fluid"> <wjGrid.FlexGrid initialized={this.initializedGrid.bind(this)} itemsSource={this.state.data}> <wjGrid.FlexGridColumn binding="id" header="ID" width={60} isReadOnly={true}></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="country" header="Country"></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="product" header="Product"></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="sales" header="Sales" aggregate="Sum"></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="expenses" header="Expenses" aggregate="Sum"></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="profit" header="Profit" dataType={2} isReadOnly={true}></wjGrid.FlexGridColumn> </wjGrid.FlexGrid> </div>; } initializedGrid(flex) { // start collapsed flex.collapseGroupsToLevel(1); // custom cell calculation flex.formatItem.addHandler((s, e) => { // cells and column footer panels only if (e.panel == s.cells) { // get row, column, and data item (or group description) let r = s.rows[e.row], c = s.columns[e.col], item = s.rows[e.row].dataItem, group = r instanceof wjcGrid.GroupRow ? item : null, negative = false; // assume value is not negative // calculate profit if (c.binding == 'profit') { let profit = group ? group.getAggregate('Sum', 'sales') - group.getAggregate('Sum', 'expenses') : item.sales - item.expenses; e.cell.textContent = wjcCore.Globalize.format(profit, c.format); negative = profit < 0; } // update 'negative' class on cell wjcCore.toggleClass(e.cell, 'negative', negative); } }); } } ReactDOM.render(<App />, document.getElementById('app')); <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid Custom Aggregation</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html> .wj-flexgrid { max-height: 250px; margin: 10px 0; } .wj-cell.wj-frozen-row { border-bottom: none; } .negative { color: red; } body { margin-bottom: 20px; } export function getData() { // create some random data let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), products = 'Phones,Computers,Cameras,Stereos'.split(','), data = []; for (let i = 0; i < 200; i++) { data.push({ id: i, country: countries[i % countries.length], product: products[i % products.length], sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } return data; }