Question

我有一个Angular Material表，我想在其中从服务中获取数据。这是我的服务。

import { Injectable } from "@angular/core";
import { HttpClient } from "@angular/common/http";
import { Message } from '../messages/message-table/message.model';

@Injectable()

export class MessageService {
  constructor(private http: HttpClient) {}

  getMessageTableData() {
    return this.http.get<Message[]>('<removed>');
  }
}

这是数据的消息接口

export interface Message {
    RequestID: string;
    RequestStatus: string;
    RequestorName: string;
    SubmissionDate: string;
    ApproverName: string;
    ApprovalDate: string;
    Subject: string;
    MessageStatus: string;
    ReadStatus: string;
  }

在我的component.ts文件中，我可以使用它在控制台中显示数据，

ngOnInit() {

    this.messageService.getMessageTableData().subscribe(
      (response) => console.log(response)
    )
}

我已经在Angular material的网站上看到了示例代码，但是由于我的表上有很多客户端过滤功能，因此我想对我的dataSource使用MatTableDataSource。该示例使用自定义数据源，但我无法在其中包含过滤器。如何在我的表格中显示这些数据，这些数据是来自服务的JSON格式？

还为我的表添加HTML代码

<table mat-table [dataSource]="dataSource" matSort class="mat-elevation-z8">
    <ng-container matColumnDef="RequestID">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Request ID </th>
        <td mat-cell *matCellDef="let element"> {{element.RequestID}} </td>
    </ng-container>

    <ng-container matColumnDef="RequestStatus">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Request Status </th>
        <td mat-cell *matCellDef="let element"> {{element.RequestStatus}} </td>
    </ng-container>

    <ng-container matColumnDef="RequestorName">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Requestor Name </th>
        <td mat-cell *matCellDef="let element"> {{element.RequestorName}} </td>
    </ng-container>

    <ng-container matColumnDef="SubmissionDate">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Submission Date </th>
        <td mat-cell *matCellDef="let element"> {{element.SubmissionDate}} </td>
    </ng-container>

    <ng-container matColumnDef="ApproverName">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Approver Name </th>
        <td mat-cell *matCellDef="let element"> {{element.ApproverName}} </td>
    </ng-container>

    <ng-container matColumnDef="ApprovalDate">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Approval Date </th>
        <td mat-cell *matCellDef="let element"> {{element.ApprovalDate}} </td>
    </ng-container>

    <ng-container matColumnDef="Subject">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Subject </th>
        <td mat-cell *matCellDef="let element"> {{element.Subject}} </td>
    </ng-container>

    <ng-container matColumnDef="MessageStatus">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Message Status </th>
        <td mat-cell *matCellDef="let element"> {{element.MessageStatus}} </td>
    </ng-container>

    <ng-container matColumnDef="ReadStatus">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Read Status </th>
        <td mat-cell *matCellDef="let element"> {{element.ReadStatus}} </td>
    </ng-container>
</table>

Answer 1

您可以过滤此数据源，或者我丢失了某些内容

dataSource: any;
ngOnInit() {
   this.messageService.getMessageTableData().subscribe(
     (response) => this.dataSource = response
     )
}

Answer 2

您将需要创建MatTableDataSource的实例，并将从服务中获取的数据传递给它。像这样：

import { MatSort, MatTableDataSource } from '@angular/material';
...

@Component({...})
export class TableComponent implements OnInit {
  ...
  dataSource;

  @ViewChild(MatSort) sort: MatSort;

  ngOnInit() {
    this.messageService.getMessageTableData()
      .subscribe(response => {
        this.dataSource = new MatTableDataSource(response);
        this.dataSource.sort = this.sort;
      });
  }

  ...

}

这是您推荐的Working Sample StackBlitz。

Answer 3

您可以使用MatTableDataSource，这将有助于过滤和排序。

dataSource: new MatTableDataSource([]);
ngOnInit() {
   this.messageService.getMessageTableData().subscribe( (data) => {
       this.dataSource.data = data || []
   })
}

applyFilter(filterValue: string) {
   this.dataSource.filter = filterValue.trim().toLowerCase();
}

供参考，添加了stackblitz示例代码。

使用HTTP GET请求获取角材料表中的数据

3 个答案: