There is no component factory available for the DialogDataExampleDialog. Have you ensured to include it in the @NgModule entryComponents?

Currently, I am a beginner in Angular. I recently started integrating MatDialog into my project. To do this, I followed the code provided on the official Angular documentation page https://material.angular.io/components/dialog/overview. However, upon clicking on "Open dialog," I encountered an error.

Below is the code from my donations.component.ts

import {MatDialog, MAT_DIALOG_DATA} from '@angular/material/dialog';

export interface DialogData {
  animal: 'panda' | 'unicorn' | 'lion';
}
@Component({
  selector: 'app-donations',
  templateUrl: './donations.component.html',
  styleUrls: ['./donations.component.css']
})
export class DonationsComponent implements OnInit {

    constructor(public dialog: MatDialog) {}

    openDialog() {
      this.dialog.open(DialogDataExampleDialog, {
        data: {
          animal: 'panda'
        }
      });
    }

  ngOnInit(): void {
  }

}

@Component({
  selector: 'dialog-data-example-dialog',
  templateUrl: 'dialog-data-example-dialog.html',
})
@Injectable({ providedIn: 'root' })
export class DialogDataExampleDialog {
  constructor(@Inject(MAT_DIALOG_DATA) public data: DialogData) {}
}

Next, here is the content of my donations.module.ts

import { CommonModule } from '@angular/common';
import { DonationsComponent } from './donations.component';
import { DialogDataExampleDialog } from './donations.component';
import { DonationsRoutingModule } from './donations-routing.module';

import {MatTableModule} from '@angular/material/table';
import { MatPaginatorModule } from '@angular/material/paginator';
import { MatSortModule } from '@angular/material/sort';
import { MatFormFieldModule } from '@angular/material/form-field';
import { MatInputModule } from '@angular/material/input';
import {MatCheckboxModule} from '@angular/material/checkbox';
import {MatSelectModule} from '@angular/material/select';
import {MatButtonModule} from '@angular/material/button';
import {MatIconModule} from '@angular/material/icon';
 import {MatMenuModule} from '@angular/material/menu';


@NgModule({
  declarations: [DonationsComponent,DialogDataExampleDialog],
  imports: [
    CommonModule,
    DonationsRoutingModule,
    MatTableModule,
    MatSortModule,
    MatPaginatorModule,
    MatFormFieldModule,
    MatInputModule,
    MatCheckboxModule,
    MatSelectModule,
    MatButtonModule,
    MatIconModule,
    MatMenuModule,
],
exports: [DonationsComponent],
entryComponents: [DialogDataExampleDialog],
})
export class DonationsModule{}

After that, here is the structure of my donations.component.html

<button mat-button (click)="openDialog()">Open dialog</button>

Last but not least, the contents of dialog-data-example-dialog.html are as follows:

<div mat-dialog-content>
  My favorite animal is:
  <ul>
    <li>
      <span *ngIf="data.animal === 'panda'">&#10003;</span> Panda
    </li>
    <li>
      <span *ngIf="data.animal === 'unicorn'">&#10003;</span> Unicorn
    </li>
    <li>
      <span *ngIf="data.animal === 'lion'">&#10003;</span> Lion
    </li>
  </ul>
</div>

I would greatly appreciate any help in solving this issue.

Answer №1

It's unclear if this is the root issue, but you may want to consider removing the @Injectable annotation from DialogDataExampleDialog as it is already defined as a @Component.

Maybe give that a shot?

Answer №2

Explore this Angular material dialog sample,
I took inspiration from @moufed's code. Thank you, @moufed!
I made a simple addition to styles.css that will customize the display as per your requirements.

@import "~@angular/material/prebuilt-themes/deeppurple-amber.css";

In order to achieve this, it is important to refer to this guide on "dynamically load a component by type imperatively".
The implementation method used in OP's code falls under number 2,

  1. A component must be listed under "entryComponents" in AppModule (app.module.ts or main.ts)
  2. A component must also be included in "entryComponents" of your module --> Your module should then be imported within AppModule.

Here is donation.module.ts

@NgModule({
  declarations: [DonationsComponent,DialogDataExampleDialog],
  imports: [
    CommonModule,
   exportsModules
  ],
  exports: [DonationsComponent,DialogDataExampleDialog,...exportsModules],
  entryComponents: [DialogDataExampleDialog ], // Include component in entryComponents
})
export class DonationsModule { }
`` 

Here is app.module.ts

@NgModule({
  imports:      [ 
   BrowserModule, FormsModule ,BrowserAnimationsModule, 
   DonationsModule // Make sure to import your module here which contains entryComponents
  ],
  declarations: [ AppComponent, HelloComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }

If we intend to dynamically use certain components with ViewContainerRef or similar methods, our components need to be part of the "entryComponents".

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