Angular7 - 无法绑定到 'dataSource'，因为它不是 'mat-table' 的已知属性

Question

我正在使用 Angular 7.0.2，我在尝试使用 Angular Material

创建 table 时遇到此错误

Can't bind to 'dataSource' since it isn't a known property of 'mat-table'

应用-routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MatTableModule } from '@angular/material';

import { HomeComponent } from './home/home.component';
import { ProductionOrderComponent } from './production-order/production-order.component';

const routes: Routes = [
  { path: '', component: HomeComponent },
  { path: 'production-order', component: ProductionOrderComponent },
];

@NgModule({
  imports: [
    RouterModule.forRoot(routes),
    HttpClientModule,
    BrowserAnimationsModule,
    MatTableModule,
  ],
  exports: [RouterModule]
})
export class AppRoutingModule { }

html

<mat-table [dataSource]="productionOrder" class="mat-elevation-z8">
  <ng-container matColumnDef="t_pdno">
    <th mat-header-cell *matHeaderCellDef>Production Order</th>
    <td mat-cell *matCellDef="let productionOrder">{{ productionOrder.t_pdno }}</td>
  </ng-container>
  <ng-container matColumnDef="t_mitm">
    <th mat-header-cell *matHeaderCellDef>Item</th>
    <td mat-cell *matCellDef="let productionOrder">{{ productionOrder.t_mitm }}</td>
  </ng-container>
  <mat-header-row *matHeaderRowDef="['t_pdno', 't_mitm']"></mat-header-row>
  <mat-row *matRowDef="let row; columns: ['t_pdno', 't_mitm'];"></mat-row>
</mat-table>

组件

import { Component, OnInit } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Component({
  selector: 'app-production-order',
  templateUrl: './production-order.component.html',
  styleUrls: ['./production-order.component.scss']
})
export class ProductionOrderComponent implements OnInit {

  public productionOrder

  constructor(private http: HttpClient) { }

  ngOnInit() {
    this.getData()
  }

  getData() {
    this.http.get('http://localhost:3000/api/production-order').subscribe(res => {
      console.log(res['data'])
      this.productionOrder = res['data']
    })
  }

}

我尝试了什么：

使用<table mat-table>代替<mat-table>
import { MatTableModule } from '@angular/material'; 组件中

和这些链接：

有人知道如何解决这个问题吗？

Answer 1

您应该在 AppModule 或声明组件的模块中导入 MatTableModule。

@NgModule({
  imports: [
    MatTableModule
    ...
  ]
})
public class AppModule

或

@NgModule({
  imports: [
    MatTableModule
    ...
  ],
  declarations : [ProductionOrderComponent]
})
public class MyModule

Answer 2

我想完成 Sunil 的回答：您应该在 AppModule 或声明组件的模块中导入 MatTableModule 和 CdkTableModule。

@NgModule({
  imports: [
    CdkTableModule,
    MatTableModule
    ...
  ]
})
public class AppModule

Answer 3

如果您认为通过在 app.module.ts 导入 MatTableModule 所做的一切都是正确的，如下所示

import { MatTableModule } from '@angular/material';
@NgModule({
  declarations: [
    AppComponent,
    TopBarComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    BrowserAnimationsModule,
    MatTableModule,
    CdkTableModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})

并在 html 处将 < table > 更改为 < meta-table > 并且仍然无法正常工作，看看你如何编写 dataSource 属性标签。

it has to be [dataSource] not [datasource]

Angular7 - 无法绑定到 'dataSource'，因为它不是 'mat-table' 的已知属性

Angular7 - Can't bind to 'dataSource' since it isn't a known property of 'mat-table'

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Angular7 - 无法绑定到 'dataSource'，因为它不是 'mat-table' 的已知 属性

Angular7 - Can't bind to 'dataSource' since it isn't a known property of 'mat-table'

angular-material2

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Angular7 - 无法绑定到 'dataSource'，因为它不是 'mat-table' 的已知属性