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

I am new in angular 5 development. I am trying to develop a data table with angular material using the example provided here: "https://material.angular.io/components/table/examples";.

I am getting an error saying Can't bind to 'dataSource' since it isn't a known property of 'table'.

Please help.

Remember to add MatTableModule in your app.module's imports i.e.

In Angular 9+

import { MatTableModule } from '@angular/material/table'  

@NgModule({
  imports: [
    // ...
    MatTableModule
    // ...
  ]
})

Less than Angular 9

import { MatTableModule } from '@angular/material'  

@NgModule({
  imports: [
    // ...
    MatTableModule
    // ...
  ]
})

Thanx to @Jota.Toledo, I got the solution for my table creation. Please find the working code below:

component.html

<mat-table #table [dataSource]="dataSource" matSort>
  <ng-container matColumnDef="{{column.id}}" *ngFor="let column of columnNames">
    <mat-header-cell *matHeaderCellDef mat-sort-header> {{column.value}}</mat-header-cell>
    <mat-cell *matCellDef="let element"> {{element[column.id]}}</mat-cell>
  </ng-container>

  <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
  <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>

component.ts

import { Component, OnInit, ViewChild } from '@angular/core';
import { MatTableDataSource, MatSort } from '@angular/material';
import { DataSource } from '@angular/cdk/table';

@Component({
  selector: 'app-m',
  templateUrl: './m.component.html',
  styleUrls: ['./m.component.css'],
})
export class MComponent implements OnInit {

  dataSource;
  displayedColumns = [];
  @ViewChild(MatSort) sort: MatSort;

  /**
   * Pre-defined columns list for user table
   */
  columnNames = [{
    id: 'position',
    value: 'No.',

  }, {
    id: 'name',
    value: 'Name',
  },
    {
      id: 'weight',
      value: 'Weight',
    },
    {
      id: 'symbol',
      value: 'Symbol',
    }];

  ngOnInit() {
    this.displayedColumns = this.columnNames.map(x => x.id);
    this.createTable();
  }

  createTable() {
    let tableArr: Element[] = [{ 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' },
    ];
    this.dataSource = new MatTableDataSource(tableArr);
    this.dataSource.sort = this.sort;
  }
}

export interface Element {
  position: number,
  name: string,
  weight: number,
  symbol: string
}

app.module.ts

imports: [
  MatSortModule,
  MatTableModule,
],

• Angular Core v6.0.2,
• Angular Material, v6.0.2,
• Angular CLI v6.0.0 (globally v6.1.2)

I had this issue when running ng test, so to fix it, I added to my xyz.component.spec.ts file:

import { MatTableModule } from '@angular/material';

And added it to imports section in TestBed.configureTestingModule({}):

beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [ ReactiveFormsModule, HttpClientModule, RouterTestingModule, MatTableModule ],
      declarations: [ BookComponent ],
      schemas: [ CUSTOM_ELEMENTS_SCHEMA ]
    })
    .compileComponents();
}));

if your "import { MatTableModule } from '@angular/material';" is on a shared module, make sure you export it.

sharedmodule.ts:

import { MatTableModule } from '@angular/material' 

@NgModule({
  imports: [
    // ...
    MatTableModule
    // ...
  ],
  exports:[ MatTableModule ]
})

then on your custom module where you define the component that use material table:

custommodule.ts:

@NgModule({
imports: [ sharedmodule ]     
})

Material example is using the wrong table tags. Change

<table mat-table></table>
<th mat-header-cell></th>
<td mat-cell></td>

<tr mat-header-row></tr>
<tr mat-row></tr>

to

<mat-table></mat-table>
<mat-header-cell></mat-header-cell>
<mat-cell></mat-cell>

<mat-header-row></<mat-header-row>
<mat-row></<mat-row>

For Angular 7

Check where is your table component located. In my case it was located like app/shared/tablecomponent where shared folder contains all sub components But I was importing material module in Ngmodules of app.module.ts which was incorrect. In this case Material module should be imported in Ngmodules of shared.module.ts And it works.

There is NO NEED to change 'table' to 'mat-table' in angular 7.

https://stackoverflow.com/questions/53185437/angular7-cant-bind-to-datasource-since-it-isnt-a-known-property-of-mat-ta?noredirect=1&lq=1

In my case the trouble was I didn't put the components that contain the datasource in the declarations of main module.

NgModule({
  imports: [
    EnterpriseConfigurationsRoutingModule,
    SharedModule
  ],
  declarations: [
    LegalCompanyTypeAssignComponent,
    LegalCompanyTypeAssignItemComponent,
    ProductsOfferedListComponent,
    ProductsOfferedItemComponent,
    CustomerCashWithdrawalRangeListComponent,
    CustomerCashWithdrawalRangeItemComponent,
    CustomerInitialAmountRangeListComponent,
    CustomerInitialAmountRangeItemComponent,
    CustomerAgeRangeListComponent,
    CustomerAgeRangeItemComponent,
    CustomerAccountCreditRangeListComponent, //<--This component contains the dataSource
    CustomerAccountCreditRangeItemComponent,
  

  ],

The component contains the dataSource:

export class CustomerAccountCreditRangeListComponent implements OnInit {

  @ViewChild(MatPaginator) set paginator(paginator: MatPaginator){
    this.dataSource.paginator = paginator;
  }
  @ViewChild(MatSort) set sort(sort: MatSort){
    this.dataSource.sort = sort;
  }

  dataSource = new MatTableDataSource(); //<--The dataSource used in HTML
  loading: any;
  resultsLength: any;
  displayedColumns: string[] = ["id", "desde", "hasta", "tipoClienteNombre", "eliminar"];
  data: any;

  constructor(
    private crud: CustomerAccountCreditRangeService,
    public snackBar: MatSnackBar,
    public dialog: MatDialog,
    private ui: UIComponentsService
  ) {
  }

This is for Angular 9

I imported MatTableModule in app-routing module and the error was gone.

I was also breaking my head for a long time with this error message and later I identified that I was using [datasource] instead of [dataSource].

I had the same issue! Although I rectified it my adding the import of MatTableModule into the mycustom module.ts , instead of adding it in app.module.ts

Note: As I have created a custom module(inbox.module.ts) and created components in it, hence the declarations of those modules were created in inbox.module.ts, due to which the import of MatTableModule was suppose to be done in inbox.module.ts and not in app.module.ts

For those who just use the Angular CDK and not Angular Material, instead of importing MatTableModule import CdkTableModule:

import { CdkTableModule } from '@angular/cdk/table';

@NgModule({
imports: [
    ...
    CdkTableModule,
    ...
],

Remember to import the MatTableModule module and remove the [table element][1] show below for reference.
wrong implementation
<table mat-table [dataSource]=”myDataArray”> ... </table>
correct implementation:
<mat-table [dataSource]="myDataArray"> </mat-table> [1]: https://material.angular.io/components/table/overview

The problem is your angular material version, I have the same, and I have resolved this when I have installed the good version of angular material in local.

Hope it solve yours too.

If you've tried everything mentioned here and it didn't work, make sure you also have added angular material to your project. If not, just run the following command in the terminal to add it:

ng add @angular/material

After it successfully gets added, wait for the project to get refreshed, and the error will be automatically gone.

Please see your dataSource varibale doesn't get the data from the server or dataSource is not assigned to the expected format of data.