NullInjectorError：没有 MatDialogRef 的提供者

Question

我不能像文档中描述的那样注入 MatDialogRef： https ://material.angular.io/components/dialog/overview

当我尝试这样做时，我遇到了错误：

ERROR 错误：StaticInjectorError[MatDialogRef]：StaticInjectorError[MatDialogRef]：NullInjectorError：没有 MatDialogRef 的提供者！

app.module.ts

 import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule }   from '@angular/forms';

import {
	MatInputModule,
	MatDialogModule,
	MatProgressSpinnerModule,
	MatButtonModule,
	MatDialog,
	MatDialogRef
} from '@angular/material';

import { ApiModule } from '../api/api.module';
import { RoutingModule } from '../routing/routing.module';

import { RegistrationComponent } from './components/registration.component';
import { LoginComponent } from './components/login.component';

import { AccountService } from './services/account.service';

@NgModule({
	imports: [
		BrowserModule,
		MatInputModule,
		MatDialogModule,
		MatProgressSpinnerModule,
		MatButtonModule,
		FormsModule,
		RoutingModule,
		ApiModule
	],
	declarations: [
		RegistrationComponent,
		LoginComponent
	],
	entryComponents: [
		LoginComponent,
		RegistrationComponent
	],
	providers: [
		AccountService,
		MatDialog,
		MatDialogRef
	]
})
export class AccountModule {}

home.component.ts

 import { Component } from '@angular/core';

import { MatDialog } from '@angular/material';
import { RegistrationComponent } from '../account/components/registration.component';

@Component({
    moduleId: module.id.replace('compiled', 'app'),
    templateUrl: 'home.component.html'
})
export class HomeComponent
{
    constructor(private modalService: MatDialog) {}

    public openModal() : void
    {
        let dialog = this.modalService.open(RegistrationComponent, {});
    }
}

注册.component.ts

 import { Component } from '@angular/core';
import { Router } from '@angular/router';
import { MatDialogRef } from '@angular/material/dialog';

import { User } from '../../../models/domain/User';
import { ApiUserService } from '../../api/entity-services/user.service';
import { AuthService } from '../../auth/auth.service';
import { AccountService } from '../services/account.service'

@Component({
	selector: 'registration-component',
	templateUrl: 'app/modules/account/templates/registration.component.html'
})
export class RegistrationComponent
{
	public user :User = new User();

	public errorMessage :string;

	public isLoading :boolean;

	constructor
	(
		private userService :ApiUserService,
		private authService :AuthService,
		private accountService :AccountService,
		private router :Router,
		public dialogRef :MatDialogRef<RegistrationComponent>
	)
	{
		this.isLoading = false;
	}

	public onSubmit(e) :void
	{
		e.preventDefault();
		this.isLoading = true;

		this.userService
			.Create(this.user)
			.subscribe(
				user =>
				{
					this.user.id = user.id;
					this.user.login = user.login;

					this.authService
						.Login(this.user)
						.subscribe(
							token =>
							{
								this.accountService.Load()
									.subscribe(
										account =>
										{
											this.user = account;
											this.isLoading = false;
											this.dialogRef.close();

											let redirectRoute = account.activeScopeId
												? `/scope/${account.activeScopeId}`
												: '/scope-list/';

											this.router.navigate([redirectRoute]);
										},
										error => this.errorMessage = <any>error
									);
							},
							error => this.errorMessage = <any>error
						);
				},
				error => this.errorMessage = <any>error
			);
	}
}

原文由 rc21 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

Thanks to the @Edric, i’v solved the problem by importing MatDialogModule , MatDialog and MatDialogRef from @angular/material/dialog instead of @angular/material

原文由 rc21 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

我有几次这个问题，就我而言，我试图实现一个带有可选数据的模式。我的解决方案是将这段代码添加到实现我试图显示的对话框/模式的父模块中。

如果您在 app.module.ts （祖父母等）中实现提供程序，我测试了此解决方案，它仍然可以工作。

 // direct.parent.module.ts

// Import statements
import{...} from '';
import{<YOUR_COMPONENT>} from 'YOUR_COMPONENT_PATH';
...

@NgModule({
  declarations: [..],
  imports:[..],
  providers: [ // <== This is the key that made it work
    {
      provide: MatDialogRef,
      useValue: {}
    },
    { provide: MAT_DIALOG_DATA, useValue: {} }, // <== I had to add this too
    <YOUR_COMPONENT> // My Component
  ],
})

export class DirectParentModule { }

原文由 AllJs 发布，翻译遵循 CC BY-SA 4.0 许可协议