我希望将组件插入到整行中。 相反,该组件似乎被插入到新行的第一列中。
这是 Angular 9 中的一个可重现的示例:https://stackblitz.com/edit/angular-ithddx 我最初在 Angular 8 中使用 @angular/material 8.2.3 遇到了这个问题。
单击第一行会插入组件,但会展开第一列,而不是使用创建的整个新行。
<div class="example-container mat-elevation-z8">
<table mat-table #table [dataSource]="dataSource">
<!--- 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">
<th mat-header-cell *matHeaderCellDef> No. </th>
<td mat-cell *matCellDef="let element"> {{element.position}} </td>
</ng-container>
<!-- Name Column -->
<ng-container matColumnDef="name">
<th mat-header-cell *matHeaderCellDef> Name </th>
<td mat-cell *matCellDef="let element"> {{element.name}} </td>
</ng-container>
<!-- Weight Column -->
<ng-container matColumnDef="weight">
<th mat-header-cell *matHeaderCellDef> Weight </th>
<td mat-cell *matCellDef="let element"> {{element.weight}} </td>
</ng-container>
<!-- Symbol Column -->
<ng-container matColumnDef="symbol">
<th mat-header-cell *matHeaderCellDef> Symbol </th>
<td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns; let index = index"
(click)="insertComponent(index)"
#tableRow>
</tr>
</table>
</div>
import {Component, ViewChildren, ViewContainerRef, ComponentFactoryResolver, ComponentFactory, Input} from '@angular/core';
import {MatTableDataSource} from '@angular/material/table';
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent {
displayedColumns = ['position', 'name', 'weight', 'symbol'];
dataSource = new MatTableDataSource<Element>(ELEMENT_DATA);
@ViewChildren('tableRow', { read: ViewContainerRef }) rowContainers;
expandedRow: number;
constructor(private resolver: ComponentFactoryResolver) { }
insertComponent(index: number) {
if (this.expandedRow != null) {
// clear old content
this.rowContainers.toArray()[this.expandedRow].clear();
}
if (this.expandedRow === index) {
this.expandedRow = null;
} else {
const container = this.rowContainers.toArray()[index];
const factory: ComponentFactory<any> = this.resolver.resolveComponentFactory(InlineMessageComponent);
const inlineComponent = container.createComponent(factory);
inlineComponent.instance.user = this.dataSource.data[index].name;
inlineComponent.instance.weight = this.dataSource.data[index].weight;
this.expandedRow = index;
}
}
}
/*
* The component that will be dynamically rendered between table rows
*/
@Component({
selector: 'app-inline-message',
template: '<p>Name: {{ user }} |</p><p>| weight {{ weight }}</p>',
styles: [`
:host {
display: flex;
place-content:center;
padding: 24px;
color: #555555;
font-weight: bold;
background: rgba(0,0,0,0.1);
}
`]
})
export class InlineMessageComponent {
@Input() user: string;
@Input() weight: string;
}
我期待与我所关注的 Angular 5 示例相同的行为。 https://stackblitz.com/edit/angular-yxznk8-rongna
尝试过的事情:
- 交换
<tr mat-row>
与<mat-row>
- 使用 MatTableDataSource 并插入新行
- 此方法使新行的样式变得困难
- 代码明显增多
- 即使空行也会显示新行
最佳答案
您需要做的就是将 HTML 放入标记中并遵循 Anguler 指令:
<div class="example-container mat-elevation-z8">
<mat-table #table [dataSource]="dataSource">
<!--- 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>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row; columns: displayedColumns; let index = index"
(click)="insertComponent(index)"
#tableRow>
</mat-row>
</mat-table>
</div>
更容易解析的示例:
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
而不是
<tr mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
关于angular - 在垫表行下方插入组件仅插入到单列中,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61937429/