Angular Material 没有 MatDialog 的提供者!错误

Question

我正在尝试使用 Angular Material 模块通过单击按钮打开模型。我已按照 https://material.angular.io/components/dialog/examples 中建议的示例进行操作.

但是，当我尝试运行该应用程序时，我看到了以下错误 -

errors.js:48 ERROR Error: Uncaught (in promise): Error: StaticInjectorError[MatDialog]: 
  StaticInjectorError[MatDialog]: 
    NullInjectorError: No provider for MatDialog!
Error: StaticInjectorError[MatDialog]: 
  StaticInjectorError[MatDialog]: 
    NullInjectorError: No provider for MatDialog!
    at _NullInjector.get (injector.js:31)
    at resolveToken (injector.js:387)
    at tryResolveToken (injector.js:330)
    at StaticInjector.get (injector.js:170)
    at resolveToken (injector.js:387)
    at tryResolveToken (injector.js:330)
    at StaticInjector.get (injector.js:170)
    at resolveNgModuleDep (ng_module.js:103)
    at NgModuleRef_.get (refs.js:1037)
    at resolveDep (provider.js:455)
    at _NullInjector.get (injector.js:31)
    at resolveToken (injector.js:387)
    at tryResolveToken (injector.js:330)
    at StaticInjector.get (injector.js:170)
    at resolveToken (injector.js:387)
    at tryResolveToken (injector.js:330)
    at StaticInjector.get (injector.js:170)
    at resolveNgModuleDep (ng_module.js:103)
    at NgModuleRef_.get (refs.js:1037)
    at resolveDep (provider.js:455)
    at resolvePromise (zone.js:824)
    at resolvePromise (zone.js:795)
    at eval (zone.js:873)
    at ZoneDelegate.invokeTask (zone.js:425)
    at Object.onInvokeTask (ng_zone.js:575)
    at ZoneDelegate.invokeTask (zone.js:424)
    at Zone.runTask (zone.js:192)
    at drainMicroTaskQueue (zone.js:602)
    at ZoneTask.invokeTask [as invoke] (zone.js:503)
    at invokeTask (zone.js:1540)
defaultErrorLogger @ errors.js:48

我有以下项目文件设置

应用程序模块.ts

我已经导入了 MatDialogModule 并将其放入导入中。 在 Entry 组件中，我添加了需要在模态中呈现的组件。

import { MatDialogModule } from '@angular/material/dialog';

@NgModule({
  imports:      [ BrowserModule, BrowserAnimationsModule, FormsModule, NgbModule.forRoot(), ReactiveFormsModule, 
                  HttpClientModule, routing, MatTabsModule, MatDialogModule ],
  declarations: [ AppComponent, AppHeaderComponent, SignInComponent, RecruitmentHomeComponent, JobTemplatesComponent, CreateJobTemplateComponent ],
  bootstrap:    [ AppComponent ],
  entryComponents: [CreateJobTemplateComponent],
  providers: [AuthGuard, UserService, AuthenticationService]
})

job-templates.component.ts 中的代码

这是负责在单击添加到其模板的按钮时调用模型的文件。

import { Component, OnInit } from '@angular/core';
import { CreateJobTemplateComponent } from './create-job-template/create-job-template.component';
import { MatDialog } from '@angular/material';


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

  constructor(public dialog: MatDialog) { }

  ngOnInit() {
  }

  createjobtemplate(){
    let dialogRef = this.dialog.open(CreateJobTemplateComponent, {
      width: '250px'
    });
    //Set the dialogRef property of opened dialog with the obtained ref
    dialogRef.componentInstance.dialogRef = dialogRef;
  }

}

创建作业模板.component.ts

此组件将在模态对话框中呈现自身。

import { Component, Inject, OnInit } from '@angular/core';
import { MatDialogRef } from '@angular/material';
import { FormGroup, FormBuilder } from '@angular/forms';

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

  form: FormGroup;

  constructor(private formBuilder: FormBuilder, public dialogRef: MatDialogRef<CreateJobTemplateComponent>) { }

  ngOnInit() {
    this.form = this.formBuilder.group({
      filename: ''
    })
  }

  submit(form) {
    this.dialogRef.close(`${form.value.filename}`);
  }

}

任何人都可以让我知道我哪里出错了吗？我查找的大多数错误都与注入(inject) MatDialogRef 失败有关，但我发现这个错误是针对 MatDialog 的。

我也浏览了这个博客，以确保我遵循了相同的步骤。 https://blog.thoughtram.io/angular/2017/11/13/easy-dialogs-with-angular-material.html

作为引用，我有代码在

https://stackblitz.com/edit/angular-fhhmff

Answer 1

同样的错误。 原来我是进口的

从'@angular/material'导入{MatDialog}；

应该是

从'@angular/material/dialog'导入{MatDialog}；