如果未找到数据，如何在数据表角材料中显示空消息 [英] How to show empty message in data table angular material, If no data found

问题描述

我正在使用此代码

 <mat-table #table [dataSource]="dataSource" matSort >
  <ng-container matColumnDef="tache">
    <mat-header-cell *matHeaderCellDef mat-sort-header> tâche </mat-header-cell>
    <mat-cell *matCellDef="let element"> {{element.tache}} </mat-cell>
  </ng-container>

  <ng-container matColumnDef="outil">
    <mat-header-cell *matHeaderCellDef mat-sort-header> outil </mat-header-cell>
    <mat-cell *matCellDef="let element"> {{element.outil}} </mat-cell>
  </ng-container>  <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
  <mat-row *matRowDef="let row; columns: displayedColumns;" (click)="selection.toggle(row)">
  </mat-row>
</mat-table>

因此，如何在数据表中显示空消息找不到记录".

So, how to show empty message "No Record found" in data table.

推荐答案

就像错误在说，您只能使用*ngIf.在这里比较这两个表:

It's like bugs is saying, you can just use *ngIf. Compare these two tables here:

https://stackblitz.com/edit/angular-w9ckf8

<mat-toolbar color="primary">My empty table</mat-toolbar>

<mat-table #table [dataSource]="dataSourceEmpty" matSort *ngIf="dataSourceEmpty.length > 0">
    <ng-container matColumnDef="Name">
        <mat-header-cell *matHeaderCellDef mat-sort-header>Name </mat-header-cell>
        <mat-cell *matCellDef="let element"> {{element.name}} </mat-cell>
    </ng-container>

    <ng-container matColumnDef="Age">
        <mat-header-cell *matHeaderCellDef mat-sort-header>Age </mat-header-cell>
        <mat-cell *matCellDef="let element"> {{element.age}} </mat-cell>
    </ng-container>
    <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
    <mat-row *matRowDef="let row; columns: displayedColumns;" (click)="row.toggle(row)">
    </mat-row>
</mat-table>

<div *ngIf="dataSourceEmpty.length === 0">No records found</div>

<hr>

<mat-toolbar color="primary">My full table</mat-toolbar>

<mat-table #table [dataSource]="dataSource" matSort *ngIf="dataSource.length > 0">
    <ng-container matColumnDef="Name">
        <mat-header-cell *matHeaderCellDef mat-sort-header>Name </mat-header-cell>
        <mat-cell *matCellDef="let element"> {{element.name}} </mat-cell>
    </ng-container>

    <ng-container matColumnDef="Age">
        <mat-header-cell *matHeaderCellDef mat-sort-header>Age </mat-header-cell>
        <mat-cell *matCellDef="let element"> {{element.age}} </mat-cell>
    </ng-container>
    <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
    <mat-row *matRowDef="let row; columns: displayedColumns;" (click)="row.toggle(row)">
    </mat-row>
</mat-table>

<div *ngIf="dataSource.length === 0">No data</div>

包含数据的TS:

TS with data:

displayedColumns = ['Name', 'Age']
dataSource = [{name:'Sara',age:17}, {name: 'John', age: 20}]
dataSourceEmpty = []

这篇关于如果未找到数据，如何在数据表角材料中显示空消息的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！