如何在角材料表中定义索引 [英] how to define index in angular material table

问题描述

当使用角度材料表时，我应该如何定义索引变量，因为该表中未使用 ngFor.

我确实在文档中搜索过它，但在其中的任何地方都没有提到索引.

 <mat-table #table [dataSource]="dataSource"><!--- 请注意，这些列可以按任何顺序定义.实际呈现的列被设置为行定义上的属性" --><!-- 位置列--><ng-container matColumnDef="position"><mat-h​​eader-cell *matHeaderCellDef>号</mat-h​​eader-cell><mat-cell *matCellDef="let element">{{element.position}} </mat-cell></ng-容器><!-- 名称列--><ng-container matColumnDef="name"><mat-h​​eader-cell *matHeaderCellDef>名称</mat-h​​eader-cell><mat-cell *matCellDef="let element">{{element.name}} </mat-cell></ng-容器><!-- 权重栏--><ng-container matColumnDef="weight"><mat-h​​eader-cell *matHeaderCellDef>重量</mat-h​​eader-cell><mat-cell *matCellDef="let element">{{element.weight}} </mat-cell></ng-容器><!-- 符号列--><ng-container matColumnDef="symbol"><mat-h​​eader-cell *matHeaderCellDef>符号</mat-h​​eader-cell><mat-cell *matCellDef="let element">{{element.symbol}} </mat-cell></ng-容器><mat-h​​eader-row *matHeaderRowDef="displayedColumns"></mat-h​​eader-row><mat-row *matRowDef="let row; columns:displayedColumns;"></mat-row></mat-table>

我在哪里以及如何为我在这个表中使用的数组定义一个索引变量，以便我可以在我的表本身中绑定索引值.

解决方案

Can you add index to let element;let i = index;" 就像你对 *ngFor 所做的那样?

或者像这样:

<mat-h​​eader-cell *matHeaderCellDef>索引</mat-h​​eader-cell><mat-cell *matCellDef="let element;让 i = index;">{{i}}</ng-容器>

工作示例:https://stackblitz.com/edit/angular-acdxje?file=app/table-basic-example.html

how should I define an index variable when angular material table is used as ngFor is not used in this table.

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>

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.

解决方案

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>

Or like so:

<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>

Working Example: https://stackblitz.com/edit/angular-acdxje?file=app/table-basic-example.html

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