Tenga en cuenta que este control ha quedado obsoleto y reemplazado con el componente Grid y, como tal, recomendamos migrar a ese control. Esto no recibirá ninguna característica nueva, las correcciones de errores no tendrán prioridad. Para obtener ayuda o preguntas sobre la migración de su código base a Data Grid, comuníquese con el soporte.

Web Components Column Summaries

La tabla de datos Ignite UI for Web Components / cuadrícula de datos admite resúmenes de columnas. En algunos casos, los usuarios finales pueden sentirse abrumados por la cantidad de datos que se muestran en la cuadrícula y, a menudo, pueden estar buscando un resumen de los datos. Es posible que los usuarios finales también deseen obtener información adicional de los datos de una columna específica. Los resúmenes ayudan a los usuarios finales a conseguirlo, y puede habilitarlos estableciendo la summaryScope propiedad.

Ejemplo de resúmenes de columnas de Web Components

EXAMPLE

DATA

TS

HTML

CSS

export class DataGridSharedData {

    public static getEmployees(count?: number): any[] {
        if (count === undefined) {
            count = 250;
        }

        const employees: any[] = [];
        let maleCount: number = 0;
        let femaleCount: number = 0;
        for (let i = 0; i < count; i++) {
            const age: number = Math.round(this.getRandomNumber(20, 40));
            const gender: string = this.getRandomGender();
            const firstName: string = this.getRandomNameFirst(gender);
            const lastName: string = this.getRandomNameLast();
            const street: string = this.getRandomStreet();
            const country: string = this.getRandomItem(this.countries);
            const city: string = this.getRandomCity(country);
            const generation = Math.floor(age / 10) * 10 + "s";
            const email: string = firstName.toLowerCase() + "@" + this.getRandomItem(this.emails);
            const website: string = firstName.toLowerCase() + "-" + this.getRandomItem(this.websites);
            let photoPath: any;

            if (gender === "male") {
                maleCount++;
                if (maleCount > 26) {
                    maleCount = 1;
                }
                photoPath = this.getPhotoMale(maleCount);
            }
            else {
                femaleCount++;
                if (femaleCount > 24) {
                    femaleCount = 1;
                }
                photoPath = this.getPhotoFemale(femaleCount);
            }

            let person: any = {};
            person.Address = street + "," + city;
            person.Age = age;
            person.Birthday = this.getBirthday(age);
            person.City = city;
            person.Country = country;
            person.CountryFlag = this.getCountryFlag(country);
            person.Email = email;
            person.FirstName = firstName;
            person.Gender = this.getGenderPhoto(gender);
            person.Generation = generation;
            person.ID = this.pad(i + 1, 5);
            person.LastName = lastName;
            person.Name = firstName + " " + lastName;
            person.Phone = this.getRandomPhone();
            person.Photo = photoPath;
            person.Street = street;
            person.Salary = this.getRandomNumber(40, 200) * 1000;
            person.Sales = this.getRandomNumber(200, 980) * 1000;
            person.Website = website;
            person.Productivity = this.getProductivity();

            if (person.Salary < 50000) {
                person.Income = "Low";
            } else if (person.Salary < 100000) {
                person.Income = "Average";
            } else {
                person.Income = "High";
            }

            employees.push(person);
        }
        return employees;
    }

    public static getProductivity(weekCount?: number): any[] {
        if (weekCount === undefined) {
            weekCount = 52;
        }
        const productivity: any[] = [];
        for (let w = 0; w < weekCount; w++) {
            const value = this.getRandomNumber(-50, 50);
            productivity.push({Value: value, Week: w});
        }
        return productivity;
    }

    public static getSales(count?: number): any[] {
        if (count === undefined) {
            count = 250;
        }

        const names: string[] = [
            "Intel CPU", "AMD CPU",
            "Intel Motherboard", "AMD Motherboard", "NVIDIA Motherboard",
            "NVIDIA GPU", "GIGABYTE GPU", "Asus GPU", "AMD GPU", "MSI GPU",
            "Corsair Memory", "Patriot Memory", "Skill Memory",
            "Samsung HDD", "WD HDD", "Seagate HDD", "Intel HDD",
            "Samsung SSD", "WD SSD", "Seagate SSD", "Intel SSD",
            "Samsung Monitor", "Asus Monitor", "LG Monitor", "HP Monitor" ];
        const countries: string[] = ["USA", "UK", "France", "Canada", "Poland", "Japan", "Germany"];
        const status: string[] = ["Packing", "Shipped", "Delivered"];
        const sales: any[] = [];

        for (let i = 0; i < count; i++) {
            const price = this.getRandomNumber(100, 900);
            const items = this.getRandomNumber(10, 80);
            const value = price * items;
            const margin = this.getRandomNumber(3, 10);
            const profit = Math.round((price * margin / 100) * items);
            const country = this.getRandomItem(countries);
            sales.push({
                BundlePrice: price,
                ProductPrice: price,
                Margin: margin,
                OrderDate: this.getRandomDate(new Date(2012, 0, 1), new Date()),
                OrderItems: items,
                OrderValue: value, //  Math.round(value / 1000) + "," + Math.round(value % 1000),
                ProductID: 1001 + i,
                ProductName: this.getRandomItem(names),
                Profit: profit,
                Countries: country,
                CountryFlag: this.getCountryFlag(country),
                Status: this.getRandomItem(status)
            });
        }
        return sales;
    }

    public static getHouses(count?: number): any[] {
        if (count === undefined) {
            count = 250;
        }

        const houses: any[] = [];
        const property: string[] = [ "Townhouse", "Single", "Condo", "Villa"];
        const emails: string[] = [ "estates.com", "remax.com", "zillow.com", "realtor.com", "coldwell.com"];
        const countries: string[] = ["USA", "UK", "France", "Canada", "Poland", "Japan", "Germany"];

        for (let i = 0; i < count; i++) {
            const year: number = this.getRandomNumber(1950, 2015);
            const age: number = 2020 - year;

            const gender: string = this.getRandomGender();
            const firstName: string = this.getRandomNameFirst(gender);
            const lastName: string = this.getRandomNameLast();
            const initials = firstName.substr(0, 1).toLowerCase();
            const email: string = initials + lastName.toLowerCase() + "@" + this.getRandomItem(emails);

            const street: string = this.getRandomStreet();
            const country: string = this.getRandomItem(countries);
            const city: string = this.getRandomCity(country);

            houses.push({
                Address: street + "," + city,
                Age: age,
                Agent: firstName + " " + lastName,
                Area: this.getRandomNumber(50, 300),
                Baths: this.getRandomNumber(1, 3),
                Built: year,
                City: city,
                Country: country,
                CountryFlag: this.getCountryFlag(country),
                Email: email,
                ID: this.pad(i + 1, 5),
                Phone: this.getRandomPhone(),
                Price: this.getRandomNumber(210, 900) * 1000,
                Property: this.getRandomItem(property),
                Rooms: this.getRandomNumber(2, 5),
                SaleDate: this.getRandomDate(new Date(2015, 0, 1), new Date()),
                Street: street,
            });
        }
        return houses;
    }

    private static websites: string[] = [ ".com", ".gov", ".edu", ".org"];
    private static emails: string[] = [ "gmail.com", "yahoo.com", "twitter.com"];
    private static genders: string[] = ["male", "female"];
    private static maleNames: string[] = ["Kyle", "Oscar", "Ralph", "Mike", "Bill", "Frank", "Howard", "Jack", "Larry", "Pete", "Steve", "Vince", "Mark", "Alex", "Max", "Brian", "Chris", "Andrew", "Martin", "Mike", "Steve", "Glenn", "Bruce"];
    private static femaleNames: string[] = ["Gina", "Irene", "Katie", "Brenda", "Casey", "Fiona", "Holly", "Kate", "Liz", "Pamela", "Nelly", "Marisa", "Monica", "Anna", "Jessica", "Sofia", "Isabella", "Margo", "Jane", "Audrey", "Sally", "Melanie", "Greta", "Aurora", "Sally"];
    private static lastNames: string[] = ["Adams", "Crowley", "Ellis", "Martinez", "Irvine", "Maxwell", "Clark", "Owens", "Rooney", "Lincoln", "Thomas", "Spacey", "MOrgan", "King", "Newton", "Fitzgerald", "Holmes", "Jefferson", "Landry", "Berry", "Perez", "Spencer", "Starr", "Carter", "Edwards", "Stark", "Johnson", "Fitz", "Chief", "Blanc", "Perry", "Stone", "Williams", "Lane", "Jobs", "Adams", "Power", "Tesla"];
    private static countries: string[] = ["USA", "UK", "France", "Canada", "Poland"];
    private static citiesUS: string[] = ["New York", "Los Angeles", "Miami", "San Francisco", "San Diego", "Las Vegas"];
    private static citiesUK: string[] = ["London", "Liverpool", "Manchester"];
    private static citiesFR: string[] = ["Paris", "Marseille", "Lyon"];
    private static citiesCA: string[] = ["Toronto", "Vancouver", "Montreal"];
    private static citiesPL: string[] = ["Krakow", "Warsaw", "Wroclaw", "Gdansk"];
    private static citiesJP: string[] = ["Tokyo", "Osaka", "Kyoto", "Yokohama"];
    private static citiesGR: string[] = ["Berlin", "Bonn", "Cologne", "Munich", "Hamburg"];
    private static roadSuffixes: string[] = ["Road", "Street", "Way"];
    private static roadNames: string[] = ["Main", "Garden", "Broad", "Oak", "Cedar", "Park", "Pine", "Elm", "Market", "Hill"];

    private static getRandomNumber(min: number, max: number): number {
        return Math.round(min + Math.random() * (max - min));
    }

    private static getRandomItem(array: any[]): any {
        const index = Math.round(this.getRandomNumber(0, array.length - 1));
        return array[index];
    }

    private static getRandomDate(start: Date, end: Date) {
        return new Date(start.getTime() + Math.random() * (end.getTime() - start.getTime()));
    }

    private static getRandomPhone(): string {
        const phoneCode = this.getRandomNumber(100, 900);
        const phoneNum1 = this.getRandomNumber(100, 900);
        const phoneNum2 = this.getRandomNumber(1000, 9000);
        const phone = phoneCode + "-" + phoneNum1 + "-" + phoneNum2;
        return phone;
    }

    private static getRandomGender(): string {
        return this.getRandomItem(this.genders);
    }

    private static getRandomNameLast(): string {
        return this.getRandomItem(this.lastNames);
    }

    private static getRandomNameFirst(gender: string): string {
        if (gender === "male") {
            return this.getRandomItem(this.maleNames);
        }
        else {
            return this.getRandomItem(this.femaleNames);
        }
    }

    private static getRandomCity(country: string): string {
        if (country === "Canada") {
            return this.getRandomItem(this.citiesCA);
        } else if (country === "France") {
            return this.getRandomItem(this.citiesFR);
        } else if (country === "Poland") {
            return this.getRandomItem(this.citiesPL);
        } else if (country === "USA") {
            return this.getRandomItem(this.citiesUS);
        } else if (country === "Japan") {
            return this.getRandomItem(this.citiesJP);
        } else if (country === "Germany") {
            return this.getRandomItem(this.citiesGR);
        } else { // if (country === "United Kingdom") {
            return this.getRandomItem(this.citiesUK);
        }
    }

    private static getRandomStreet(): string {
        const num = Math.round(this.getRandomNumber(100, 300)).toString();
        const road = this.getRandomItem(this.roadNames);
        const suffix = this.getRandomItem(this.roadSuffixes);
        return num + " " + road + " " + suffix;
    }

    private static getBirthday(age: number): Date {
        const today: Date = new Date();
        const year: number = today.getFullYear() - age;
        const month: number = this.getRandomNumber(0, 8);
        const day: number = this.getRandomNumber(10, 27);
        return new Date(year, month, day);
    }

    private static getPhotoMale(id: number): string {
        return 'https://static.infragistics.com/xplatform/images/people//GUY' + this.pad(id, 2) + '.png';
    }

    private static getPhotoFemale(id: number): string {
        return 'https://static.infragistics.com/xplatform/images/people/GIRL' + this.pad(id, 2) + '.png';
    }

    private static getGenderPhoto(gender: string): string {
        return 'https://static.infragistics.com/xplatform/images/genders/' + gender + '.png';
    }

    private static getCountryFlag(country: string): string {
        return 'https://static.infragistics.com/xplatform/images/flags/' + country + '.png';
    }

    private static pad(num: number, size: number) {
        let s = num + "";
        while (s.length < size) {
            s = "0" + s;
        }
        return s;
    }

}
tsコピー

import { IgcDataGridModule } from 'igniteui-webcomponents-grids';
import { IgcGridColumnOptionsModule } from 'igniteui-webcomponents-grids';
import { IgcDataGridComponent } from 'igniteui-webcomponents-grids';
import { ModuleManager, IgcProvideCalculatorEventArgs } from 'igniteui-webcomponents-core';
import { DataGridSharedData } from './DataGridSharedData';
import { IgcColumnGroupDescription } from 'igniteui-webcomponents-grids';
import { IgcColumnSummaryDescription } from 'igniteui-webcomponents-grids'
import { DataSourceSummaryOperand, SummaryCalculator, DefaultSummaryResult, IDataSource, ISummaryResult } from 'igniteui-webcomponents-core';

ModuleManager.register(
    IgcDataGridModule,
    IgcGridColumnOptionsModule
);

export class DataGridColumnSummaries {

    private grid: IgcDataGridComponent;

    constructor() {

        this.onSummaryScopeChanging = this.onSummaryScopeChanging.bind(this);
        this.onGroupSummaryDisplayModeChanging = this.onGroupSummaryDisplayModeChanging.bind(this);

        this.grid = document.getElementById('grid') as IgcDataGridComponent;
        this.grid.dataSource = DataGridSharedData.getSales();

        document.getElementById('onSummaryScopeChanging')!.addEventListener('change', this.onSummaryScopeChanging);
        document.getElementById('onGroupSummaryDisplayModeChanging')!.addEventListener('change', this.onGroupSummaryDisplayModeChanging);

        this.onLoad();
    }

    onSummaryScopeChanging = (e: any) => {
        this.grid.summaryScope = e.target.value;
    }

    onGroupSummaryDisplayModeChanging = (e: any) => {
        this.grid.groupSummaryDisplayMode = e.target.value;
    }

    onLoad() {
        const productGroup = new IgcColumnGroupDescription();
        productGroup.field = 'ProductName';
        productGroup.displayName = 'ProductName';
        this.grid.groupDescriptions.add(productGroup);

        const productCount = new IgcColumnSummaryDescription();
        productCount.field = 'ProductName';
        productCount.operand = DataSourceSummaryOperand.Count;
        this.grid.summaryDescriptions.add(productCount);

        const priceMin = new IgcColumnSummaryDescription();
        priceMin.field = 'BundlePrice';
        priceMin.operand = DataSourceSummaryOperand.Min;
        priceMin.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
        this.grid.summaryDescriptions.add(priceMin);

        const priceMax = new IgcColumnSummaryDescription();
        priceMax.field = 'BundlePrice';
        priceMax.operand = DataSourceSummaryOperand.Max;
        priceMax.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
        this.grid.summaryDescriptions.add(priceMax);

        const orderSum = new IgcColumnSummaryDescription();
        orderSum.field = 'OrderItems';
        orderSum.operand = DataSourceSummaryOperand.Sum;
        this.grid.summaryDescriptions.add(orderSum);

        const orderValueSum = new IgcColumnSummaryDescription();
        orderValueSum.field = 'OrderValue';
        orderValueSum.operand = DataSourceSummaryOperand.Sum;
        orderValueSum.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0});
        this.grid.summaryDescriptions.add(orderValueSum);

        const orderValueAvg = new IgcColumnSummaryDescription();
        orderValueAvg.field = 'OrderValue';
        orderValueAvg.operand = DataSourceSummaryOperand.Average;
        orderValueAvg.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
        this.grid.summaryDescriptions.add(orderValueAvg);

        const orderDateMin = new IgcColumnSummaryDescription();
        orderDateMin.field = 'OrderDate';
        orderDateMin.operand = DataSourceSummaryOperand.Min;
        orderDateMin.calculatorDisplayName = 'First'
        orderDateMin.formatOverride = new Intl.DateTimeFormat('en-EN');
        this.grid.summaryDescriptions.add(orderDateMin);

        const orderDateMax = new IgcColumnSummaryDescription();
        orderDateMax.field = 'OrderDate';
        orderDateMax.operand = DataSourceSummaryOperand.Max;
        orderDateMax.calculatorDisplayName = 'Last'
        orderDateMax.formatOverride = new Intl.DateTimeFormat('en-EN');
        this.grid.summaryDescriptions.add(orderDateMax);

        const sum1 = new IgcColumnSummaryDescription();
        sum1.field = 'Profit';
        sum1.operand = DataSourceSummaryOperand.Sum;
        sum1.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
        this.grid.summaryDescriptions.add(sum1);

        const avg2 = new IgcColumnSummaryDescription();
        avg2.field = 'Profit';
        avg2.operand = DataSourceSummaryOperand.Average;
        avg2.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
        this.grid.summaryDescriptions.add(avg2);

        const countries = new IgcColumnSummaryDescription();
        countries.field = 'Countries';
        countries.operand = DataSourceSummaryOperand.Custom;
        countries.provideCalculator = this.onProvideCalculator;
        this.grid.summaryDescriptions.add(countries);
    }

    onProvideCalculator(s: IgcColumnSummaryDescription, e: IgcProvideCalculatorEventArgs) {
        e.calculator = new CustomDomestic();
    }
}

// Custom Calculator - calculates the count for all USA.
class CustomDomestic extends SummaryCalculator {
    get displayName(): string {
        return 'USA';
    }

    public usCountries: number;

    public beginCalculation(a: IDataSource, b: string): void {
        super.beginCalculation(a, b);
        this.usCountries = 0;
    }

    public endCalculation(): ISummaryResult {
       return new DefaultSummaryResult(this.propertyName, DataSourceSummaryOperand.Custom, this.usCountries)
    }

    public aggregate(a: any): void {
       if (a.Countries === 'USA') {
            this.usCountries++;
       }
    }
}

new DataGridColumnSummaries();
tsコピー

<!DOCTYPE html>
<html>
  <head>
    <title>DataGridColumnSummaries</title>
    <meta charset="UTF-8" />

    <link rel="shortcut icon" href="https://static.infragistics.com/xplatform/images/browsers/wc.png" >
    <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons" />
    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Kanit&display=swap" />
    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Titillium Web" />
    <link rel="stylesheet" href="https://static.infragistics.com/xplatform/css/samples/shared.v8.css" type="text/css" />

  </head>

  <body>
    <div id="root">

<div class="container sample">
    <div class="options horizontal">
        <span class="options-label">Summary Scope:</span>
        <select class="options-label" default-value="Root" id="onSummaryScopeChanging">
            <option>Root</option>
            <option>Groups</option>
            <option>Both</option>
            <option>None</option>
        </select>
        <span class="options-label" >Group Summary Display Mode:</span>
        <select class="options-label"  default-value="RowBottom" id="onGroupSummaryDisplayModeChanging">
            <option>List</option>
            <option>Cells</option>
            <option>RowTop</option>
            <option>RowBottom</option>
            <option>None</option>
        </select>
    </div>
    <igc-data-grid
        id="grid"
        height="calc(100% - 3rem)"
        width="100%"
        summary-scope="Root"
        group-summary-display-mode="RowTop"
        auto-generate-columns="false"
        is-group-collapsable="true"
        group-header-display-mode="combined"
        is-column-options-enabled="true"
        default-column-min-width="100"
        >
            <igc-numeric-column field="ProductID" header-text="ID" horizontal-alignment="center" ></igc-numeric-column>
            <igc-text-column field="ProductName" header-text="Product" width="*>160"></igc-text-column>
            <igc-numeric-column positive-prefix="$" field="BundlePrice" show-grouping-separator="true" header-text="Price" ></igc-numeric-column>
            <igc-numeric-column field="OrderItems" header-text="Order Items" width="*>135"></igc-numeric-column>
            <igc-numeric-column field="OrderValue" show-grouping-separator="true" header-text="Order Totals" positive-prefix="$" width="*>195"></igc-numeric-column>
            <igc-date-time-column field="OrderDate" header-text="Order Date" horizontal-alignment="right" width="*>180"></igc-date-time-column>
            <igc-numeric-column field="Profit" show-grouping-separator="true" header-text="Profit" positive-prefix="$" width="*>165"></igc-numeric-column>
            <igc-text-column field="Countries" header-text="Country" width="*>115"></igc-text-column>
    </igc-data-grid>
</div>

    </div>
    <!-- This script is needed only for parcel and it will be excluded for webpack -->
    <% if (false) { %><script src="src/index.ts"></script><% } %>

  </body>
</html>htmlコピー

/* shared styles are loaded from: */
/* https://static.infragistics.com/xplatform/css/samples */cssコピー

Edit in: Codesandbox

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Propiedad de alcance resumido

La cuadrícula de datos de Web Components admite 4 opciones de resumen que puede configurar mediante la summaryScope propiedad. Estos se enumeran y describen a continuación:

• Root: esto mostrará un total general para todas las filas de la cuadrícula de la columna a la que se aplica el resumen.
• Groups: esto es específico de filas agrupadas y muestra el total general de todas las filas de un grupo en particular.
• Both: Esto utilizará las opciones Groups y Root simultáneamente.
• None: esto deshabilitará los resúmenes de la cuadrícula.

Propiedad del modo de visualización de resumen de grupo

La cuadrícula de datos de Web Components admite la configuración de las ubicaciones en las que se muestran los resúmenes. Puede configurarlo mediante la groupSummaryDisplayMode propiedad. Las diferentes opciones para esta propiedad se enumeran y describen a continuación:

• Lista: esto mostrará los resúmenes del grupo en una lista plana en el encabezado del grupo que abarca.
• Celdas: esto representará el encabezado del grupo como celdas y los valores de resumen se representarán dentro de las celdas, alineados con su columna correspondiente. La cuadrícula solo mostrará un resumen por columna usando esta opción.
• RowTop: esto mostrará los resúmenes del grupo como filas de resumen en la parte superior del grupo.
• RowBottom: esto mostrará los resúmenes del grupo como filas de resumen en la parte inferior del grupo.
• Ninguno: esto deshabilitará la representación del resumen del grupo.

Fragmentos de código

<igc-data-grid
    summary-scope="Root"
    group-summary-display-mode="RowTop"
    auto-generate-columns="false"
    is-group-collapsable="true"
    group-header-display-mode="combined"
    default-column-min-width="100">
        <igc-text-column field="ProductName" header-text="Product"></igc-text-column>
        <igc-numeric-column positive-prefix="$" field="BundlePrice" show-grouping-separator="true" header-text="Price" ></igc-numeric-column>
        <igc-numeric-column field="OrderItems" header-text="Order Items"></igc-numeric-column>
        <igc-numeric-column field="OrderValue" show-grouping-separator="true" header-text="Order Totals" positive-prefix="$"></igc-numeric-column>
        <igc-text-column field="Countries" header-text="Ship Country"></igc-text-column>
</igc-data-grid>
html

import { IgcColumnGroupDescription } from 'igniteui-webcomponents-grids';
import { IgcColumnSummaryDescription } from 'igniteui-webcomponents-grids'
import { SummaryOperand, SummaryCalculator, DefaultSummaryResult, IDataSource, ISummaryResult } from 'igniteui-webcomponents-core';

connectedCallback() {

    // Count Operand
    const productCount = new IgcColumnSummaryDescription();
    productCount.field = "ProductName";
    productCount.operand = SummaryOperand.Count;
    this.grid.summaryDescriptions.add(productCount);
    // Min Operand with formatting
    const priceMin = new IgcColumnSummaryDescription();
    priceMin.field = "BundlePrice";
    priceMin.operand = SummaryOperand.Min;
    priceMin.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
    this.grid.summaryDescriptions.add(priceMin);
    // Max Operand and formatting
    const priceMax = new IgcColumnSummaryDescription();
    priceMax.field = "BundlePrice";
    priceMax.operand = SummaryOperand.Max;
    priceMax.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
    this.grid.summaryDescriptions.add(priceMax);
    // Sum Operand
    const orderSum = new IgcColumnSummaryDescription();
    orderSum.field = "OrderItems";
    orderSum.operand = SummaryOperand.Sum;
    this.grid.summaryDescriptions.add(orderSum);
    // Average Operand and formatting
    const orderValueAvg = new IgcColumnSummaryDescription();
    orderValueAvg.field = "OrderValue";
    orderValueAvg.operand = SummaryOperand.Average;
    orderValueAvg.formatOverride = new Intl.NumberFormat('en-EN', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0 });
    this.grid.summaryDescriptions.add(orderValueAvg);
}
ts

Resúmenes personalizados

En algunas situaciones, es posible que desee ampliar el conjunto predeterminado de resúmenes. Por ejemplo, si quisiera mostrar la cantidad de veces que aparece un valor particular en una columna, sería necesario un resumen personalizado para ello.

Los fragmentos siguientes demuestran cómo mostrar un recuento del número de valores "EE. UU." que aparecen en la columna.

import { IgcProvideCalculatorEventArgs } from 'igniteui-webcomponents-core';

onLoad() {

    const countries = new IgcColumnSummaryDescription();
    countries.field = "Countries";
    countries.operand = SummaryOperand.Custom;
    countries.provideCalculator = this.onProvideCalculator; //refer to class below
    this.grid.summaryDescriptions.add(countries);

}

onProvideCalculator(s: IgcColumnSummaryDescription, e: IgcProvideCalculatorEventArgs) {
    e.calculator = new CustomDomestic();
}

// Custom Calculator - calculates the count for all USA.
class CustomDomestic extends SummaryCalculator
{
    get displayName(): string {
        return "USA";
    }
    public usCountries: number;

    public beginCalculation(a: IDataSource, b: string): void {
        super.beginCalculation(a,b);
        this.usCountries = 0;
    }
    public endCalculation(): ISummaryResult {
       return new DefaultSummaryResult(this.propertyName, SummaryOperand.Custom, this.usCountries)
    }
    public aggregate(a: any): void {
       if (a.Countries === "USA")
       {
            this.usCountries++;
       }
    }
}
ts

Referencias de API

• IgcGridComponent
• groupSummaryDisplayMode
• summaryScope