如何在角材表格中定义索引 [英] how to define index in angular material table
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问题描述
当角度材料表用作ngFor在该表中不使用时,如何定义索引变量.
how should I define an index variable when angular material table is used as ngFor is not used in this table.
我确实在文档中进行了搜索,但是在其中的任何地方都未提及索引.
I did search for it in the documentation but index is not mentioned any where in it.
<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;"></mat-row>
</mat-table>
</div>
在哪里以及如何为该表中使用的数组定义索引变量,以便可以将索引值绑定到表本身中.
where and how do i define an index variable for the array that I used in this table, so that I can bind the index value in my table itself.
推荐答案
是否可以像使用*ngFor
一样将index
添加到let element; let i = index;"
?
Can you add index
to let element; let i = index;"
as you'd do with *ngFor
?
<mat-row *matRowDef="let row; columns: displayedColumns; let i = index"></mat-row>
或者像这样:
<ng-container matColumnDef="index">
<mat-header-cell *matHeaderCellDef> Index </mat-header-cell>
<mat-cell *matCellDef="let element; let i = index;">{{i}}</mat-cell>
</ng-container>
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