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创建表时遇到此错误

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

APP-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>

零件

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:

• 用<table mat-table>而不是<mat-table>

• import { MatTableModule } from '@angular/material'; 在组件中

和这些链接:

无法绑定到'dataSource',因为它不是'table'的已知属性

mat-table无法绑定dataSource

有人知道如何解决这个问题？

Answer 1

您应该MatTableModule在AppModule声明组件的模块中或模块中导入.

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

要么

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