Vla*_*ila 10 grouping row angular-material angular
暂且不提供为其特定表提供行分组的库,我试图在Angular Material 2 mat-table上实现这样一个功能,它没有这样的功能.
填充表格的项目:
export class BasketItem{
public id: number;
public position: number;
public quantity: number;
public groupId: number;
}
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对下表中具有相同groupId属性的行进行分组
<mat-table class="mat-elevation-z8" [dataSource]="dataSource" multiTemplateDataRows matSort matSortActive="position" matSortDirection="asc" matSortDisableClear >
<!-- Position Column -->
<ng-container matColumnDef="position">
<mat-header-cell *matHeaderCellDef mat-sort-header>
<b>Position</b>
</mat-header-cell>
<mat-cell *matCellDef="let basketItem">{{basketItem.position}}</mat-cell>
</ng-container>
<!-- Quantity Column -->
<ng-container matColumnDef="quantity">
<mat-header-cell *matHeaderCellDef>
<b>Quantity</b>
</mat-header-cell>
<mat-cell *matCellDef="let basketItem">{{basketItem.quantity}}</mat-cell>
</ng-container>
<!-- GroupId Column -->
<ng-container matColumnDef="position">
<mat-header-cell *matHeaderCellDef mat-sort-header>
<b>GroupId </b>
</mat-header-cell>
<mat-cell *matCellDef="let basketItem">{{basketItem.GroupId }}</mat-cell>
</ng-container>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let basketItem; columns: displayedColumns;" (click)="onSelect(basketItem)"></mat-row>
</mat-table>
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关于如何处理行分组的任何想法?
Ste*_*ner 25
一个非常简单的答案是按GroupID排序,这会将这些行组合在一起.但是,我猜你想在每个组之前显示一个标题行.
您可以提供<mat-row *matRowDef="...使用where子句的替代方法.这可用于显示非默认的列集.如果应该使用matRowDef,where子句接受一个返回true的函数.
然后,您提供给表的数据将是散布有组行的数据行,而该函数则告诉另一个数据行.将Basic<table mat-table>作为入门者使用,手动添加组并将where子句功能添加到app/table-basic-example.ts:
import {Component} from '@angular/core';
export interface PeriodicElement {
name: string;
position: number;
weight: number;
symbol: string;
}
export interface Group {
group: string;
}
const ELEMENT_DATA: (PeriodicElement | Group)[] = [
{group: "Group 1"},
{position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
{position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
{position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
{position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
{group: "Group 2"},
{position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
{position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
{position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
{group: "Group 3"},
{position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
{position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
{position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
];
/**
* @title Basic use of `<table mat-table>`
*/
@Component({
selector: 'table-basic-example',
styleUrls: ['table-basic-example.css'],
templateUrl: 'table-basic-example.html',
})
export class TableBasicExample {
displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];
dataSource = ELEMENT_DATA;
isGroup(index, item): boolean{
return item.group;
}
}
/** Copyright 2018 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license */
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并将groupHeader列和额外的matRowDef添加到app/table-basic-example.html:
<mat-table [dataSource]="dataSource" class="mat-elevation-z8">
<!--- Note that these columns can be defined in any order.
The actual rendered columns are set as a property on the row definition" -->
<!-- Position Column -->
<ng-container matColumnDef="position">
<mat-header-cell *matHeaderCellDef> No. </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.position}} </mat-cell>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<mat-header-cell *matHeaderCellDef> Name </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.name}} </mat-cell>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<mat-header-cell *matHeaderCellDef> Weight </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.weight}} </mat-cell>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<mat-header-cell *matHeaderCellDef> Symbol </mat-header-cell>
<mat-cell *matCellDef="let element"> {{element.symbol}} </mat-cell>
</ng-container>
<ng-container matColumnDef="groupHeader">
<mat-cell *matCellDef="let group">{{group.group}}</mat-cell>
</ng-container>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row; columns: displayedColumns"></mat-row>
<mat-row *matRowDef="let row; columns: ['groupHeader']; when: isGroup"> </mat-row>
</mat-table>
<!-- Copyright 2018 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license -->
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这是一个完成的stackblitz,它按元素的首字母分组.
这里有一个更加发达的stackblitz只提供你想要分组的列列表,它会为你插入组行.您还可以单击组行以展开或折叠它们
最后,这是一个Github项目,它从材料代码库修改MatTableDataSource类的副本.与过滤器和排序很好地配合,但与竞争对手'竞争',因为它们都以不同的方式限制记录的视图.
Sim*_*gth 15
使用 Stephen Turner 的回答,现在分享这个stackblitz fork
正如本主题前面所指出的那样,
使用 Mat-Table 进行 groupBy 的简单方法实际上是在显示的数据中添加行,
在每个新组开始时添加的这些行可以使用@Input(matRowDefWhen) 获得自定义模板
<!-- Default Table lines -->
<tr mat-header-row *matHeaderRowDef="displayedColumns; sticky: true"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
<!-- Group line -->
<tr mat-row *matRowDef="let row; columns: ['groupName']; when: isAGroup"></tr>
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在上面的例子中,当一行是一个组而不是初始数据的一部分时,isAGroup 函数应该返回 true。
也可以按如下方式实现 groupName 列模板
<ng-container matColumnDef="groupName">
<td colspan="999" mat-cell *matCellDef="let group">
{{group.name}}
</td>
</ng-container>
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最后,如果您的数据集可以变化,可以在列模板定义上添加一个循环
<ng-container *ngFor="let col of displayedColumns" [matColumnDef]="col">
<th mat-header-cell *matHeaderCellDef>{{ col }}</th>
<td mat-cell *matCellDef="let row">{{ row[col] }}</td>
</ng-container>
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然后隐藏和显示组的行只是根据新隐藏的组标准过滤显示的数据并刷新显示的数据。
很抱歉这个线程 necro,只是为了向那些寻找解决方案的人分享一段可重用的代码。
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