如何将服务变量传递到Angular Material对话框？

Question

对于mdDialog,我如何传入变量？具体来说,如何将Angular服务注入对话框组件？

Answer 1

对于传递变量,您可以从MdDialog.open()方法调用中返回的MdDialogRef实例中获取对话框中打开的组件的实例.

dialogRef = this.dialog.open(PizzaDialog, config)
dialogRef.componentInstance.<property_name>

来自github material2 docs的 Modified Pizza

@Component({
  selector: 'pizza-component',
  template: `
  <button type="button" (click)="openDialog()">Open dialog</button>
  `
})
export class PizzaComponent {

  constructor(public dialog: MdDialog) { }

  openDialog() {
    let config = new MdDialogConfig();
    let dialogRef:MdDialogRef<PizzaDialog> = this.dialog.open(PizzaDialog, config);
    dialogRef.componentInstance.name = "Ham and Pineapple";
    dialogRef.componentInstance.size = "Large";
  }
}

@Component({
  selector: 'pizza-dialog',
  template: `
  <h2>{{name}}</h2>
  <p>Size: {{size}}</p>
  <button type="button" (click)="dialogRef.close('yes')">Yes</button>
  <button type="button" (click)="dialogRef.close('no')">No</button>
  `
})
export class PizzaDialog {
  name:string;
  size:string;
  constructor(public dialogRef: MdDialogRef<PizzaDialog>) { }
}

Answer 2

Material2 beta.2

该dialog.open()函数采用第二个参数config(MdDialogConfig),您可以在其中指定任何data对象.

this.dialog.open(YourComponent, {
  data: {
    anyProperty: "myValue"
  }
});

然后,您可以从用于对话框窗口的组件中检索此对象.

export class YourDialogComponent {

  constructor(public dialogRef: MdDialogRef<YourComponent>) {
    console.log('data', this.dialogRef.config.data);
  }
}

更新:beta.3

上面的答案适用于2.0.0-beta.2Material2 的版本.如果您正在使用2.0.0-beta.3,则该config属性已被删除MdDialogRef.您可以使用MD_DIALOG_DATA打开的组件注入该值.

新的进口报表

import {MdDialog, MdDialogRef, MdDialogConfig, MD_DIALOG_DATA} from '@angular/material';

开放式对话

this.dialog.open(YourComponent, {
  data: {
    anyProperty: "myValue"
  }
});

从DialogRef组件中检索数据

export class YourDialogComponent {

  constructor(
    public dialogRef: MdDialogRef<YourDialogComponent>,
    @Inject(MD_DIALOG_DATA) public data: any) {

    console.log('data', this.data);
  }
}

Answer 3

来自https://material.angular.io/components/dialog/overview上的官方文档

使用Dialog组件共享数据.

如果要与对话框共享数据,可以使用data选项将信息传递给对话框组件.

let dialogRef = dialog.open(YourDialog, {
  data: 'your data',
});

要访问对话框组件中的数据,必须使用MD_DIALOG_DATA注入令牌:

import {Component, Inject} from '@angular/core';
import {MD_DIALOG_DATA} from '@angular/material';

@Component({
  selector: 'your-dialog',
  template: 'passed in {{ data }}',
})

export class YourDialog {
  constructor(@Inject(MD_DIALOG_DATA) public data: any) { }
}

Answer 4

要给出更新的答案以适应从“Md”到“Mat”的更新：

• 这假设您已经成功实现了一个对话框，现在只是想添加一个输入
• 当您遇到 @angular/material 没有导出成员“MD_DIALOG_DATA”的问题时，这是解决方案

要打开包含数据的对话框，请传入数据对象：

this.dialog.open(YourComponent, {
  data: {
    anyProperty: "myValue"
  }
});

要在对话框中检索该数据：

import { Component, Inject } from '@angular/core';
import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material';

export class YourDialogComponent {

  constructor(
    public dialogRef: MatDialogRef<YourDialogComponent>,
    @Inject(MAT_DIALOG_DATA) public data: any) {

    console.log('data passed in is:', this.data);
  }
}

Answer 5

这就是我做到的.

pizza.service.ts

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

@Injectable()
export class PizzaService {
    getTopping(): string {
        return "Mushrooms"
    }
}

pizzaDialog.component.ts

import { Component } from '@angular/core';
import { MdDialogRef} from '@angular/material';
import {PizzaService} from './pizza.service';

@Component({
    selector: 'pizza-dialog',
    template: `{{pizzaTopping}}
    <button type="button" (click)="dialogRef.close('yes')">Yes</button>
    <button type="button" (click)="dialogRef.close('no')">No</button>
  `,
    providers: [PizzaService]
})
export class PizzaDialog {
    pizzaTopping: string;

    constructor(public dialogRef: MdDialogRef<PizzaDialog>, private pizzaService: PizzaService) { };

    ngOnInit(): void {
        this.pizzaTopping = this.pizzaService.getTopping()
    }
}