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我有角材料表的常见组件(结构完全相同).所以我想使用ng-content并更改一些列：
@Component({
selector: 'table-basic-example',styleUrls: ['table-basic-example.css'],templateUrl: 'table-basic-example.html',})
export class TableBasicExample {
displayedColumns = ['test','name'];
dataSource = new MatTableDataSource<Element>(ELEMENT_DATA);
}
const ELEMENT_DATA: { name: string } = [
{name: 'Hydrogen'},{name: 'Helium'},{name: 'Lithium'},{name: 'Beryllium'},{name: 'Boron'},];
<div class="example-container mat-elevation-z8">
<mat-table #table [dataSource]="dataSource">
<!-- Position Column -->
<ng-container matColumnDef="test">
<mat-header-cell *matHeaderCellDef>Test</mat-header-cell>
<mat-cell *matCellDef="let element">
<ng-content select="[test]"></ng-content>
</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>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>
</div>
这就是为什么我想像布局一样使用它并投射一些数据.所以我有另一个组件：
<table-basic-example>
<div test>
test
</div>
</table-basic-example>
但结果很奇怪.我在最后一排得到了投影.
@L_404_1@
解决方法
您应该将ng-template与ngTemplateOutlet一起使用.以下为我工作.
这就是ng-content可能不起作用的原因angulars-content-projection-trap-and-why-you-should-consider-using-template-outlet-instead
@Component({
selector: 'table-basic-example',})
export class TableBasicExample {
@Input() templateRef: TemplateRef<any>;
displayedColumns = ['test',];
<div class="example-container mat-elevation-z8">
<mat-table #table [dataSource]="dataSource">
<!-- Position Column -->
<ng-container matColumnDef="test">
<mat-header-cell *matHeaderCellDef>Test</mat-header-cell>
<mat-cell *matCellDef="let element">
<!-- using ng-template with ngTemplateOutlet instead of ng-content -->
<ng-template [ngTemplateOutlet]="templateRef"></ng-template>
</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>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>
</div>
<table-basic-example>
<div test [templateRef]="columnTemplateRef">
<ng-template #columnTemplateRef>
test
</ng-template>
</div>
</table-basic-example>
