角材料样式消失

Question

谁能告诉我我在这里做错了什么？

我有一个物质日期范围的条目，它本身看起来不错。我已经检查了一切，但是我不知所措，因为我看不到这种情况。

    <p>Works</p>
<mat-form-field appearance="fill" class="z1">
    <mat-label>Enter a date range</mat-label>
    <mat-date-range-input [rangePicker]="picker">
        <input matStartDate placeholder="Start date" [(ngModel)]="start">
        <input matEndDate placeholder="End date" [(ngModel)]="end">
    </mat-date-range-input>
    <mat-hint>MM/DD/YYYY – MM/DD/YYYY</mat-hint>
    <mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
    <mat-date-range-picker #picker></mat-date-range-picker>
</mat-form-field>

<button mat-button (click)="search()">Search</button>
<!--<mat-form-field>
    <mat-table></mat-table>
</mat-form-field>-->

给我

但是，在有或没有表格字段的情况下，删除了桌子该格式。

<p>Works</p>
<mat-form-field appearance="fill" class="z1">
    <mat-label>Enter a date range</mat-label>
    <mat-date-range-input [rangePicker]="picker">
        <input matStartDate placeholder="Start date" [(ngModel)]="start">
        <input matEndDate placeholder="End date" [(ngModel)]="end">
    </mat-date-range-input>
    <mat-hint>MM/DD/YYYY – MM/DD/YYYY</mat-hint>
    <mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
    <mat-date-range-picker #picker></mat-date-range-picker>
</mat-form-field>

<button mat-button (click)="search()">Search</button>
<mat-form-field>
    <mat-table></mat-table>
</mat-form-field>

供参考，这是我的导入。

@NgModule({
  declarations: [
    AppComponent,
    PrintBookingComponent,
    PrintBookingDetailsComponent,
    OrderSearchComponent,
    OrderBookingComponent,
    PageNotFoundComponent,
    HomeComponent
  ],
  imports: [
    MatDatepickerModule,
    MatInputModule,
    MatFormFieldModule,
    MatNativeDateModule,
    MatButtonModule,
    MatRippleModule,
    BrowserAnimationsModule,
    MatMenuModule,
    MatTabsModule,
    MatTableModule,
    MatIconModule,
    BrowserModule,
    GraphQLModule,
    HttpClientModule,
    ApolloModule,
    FormsModule,
    AppRoutingModule,

  ],
  providers: [
    {
      provide: APOLLO_FLAGS,
      useValue: {
        useInitialLoading: true, // enable it here
      },
    },{
    provide: APOLLO_OPTIONS,
    useFactory: (httpLink: HttpLink) => {
      return {
        cache: new InMemoryCache(),
        
        link: httpLink.create({
          uri: 'http://localhost:3000/graphql/',
        }),
      };
    },
    deps: [HttpLink],
  }],
  bootstrap: [AppComponent]
})
export class AppModule { }

Answer 1

首先，不要用mat-Form-field包裹，因为MAT-FORM-FIEL仅与输入，按钮等的表单一起使用。然后添加dataSource，行，标头，列类似于下面的代码

html：``

<table mat-table [dataSource]="dataSource">
  <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"></tr>
</table>

``

ts：'

displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];
  dataSource = [
    {position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
    {position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
    {position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
    {position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
    {position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
    {position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
    {position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
    {position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
    {position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
    {position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},

Answer 2

我已经更新了您的Stackblitz。请检查。

https://stackblitz.com/edit/angular-ivy-hhofab?file=src%2Fapp%2Forder-search%2forder-search%2forder-search.component.h TML，SRC％2FAPP％2Forder-search％2Forder-search.component.ts，src％2FAPP％2Forder-search％2Forder-search.component.scomponent.scss.scss

证据