在 angular 7 中，如何使用来自对象的数据填充 mat-table [英] In angular 7 , How do I populate a mat-table with a data from an object

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问题描述

目前我有以下代码来填充表格.

在 component.ts 中:

import { HttpClient } from "@angular/common/http";从@angular/core"导入 { Component, OnInit };从@angular/forms"导入 { FormBuilder, FormGroup, Validators };从@angular/router"导入 { ActivatedRoute, Router };从@angular/material/table"导入 { MatTableDataSource };@成分({styleUrls: ["./styles.scss"],templateUrl: "./template.html"})导出类 MyRouteData {员工信息表:对象；构造函数(私有 http:HttpClient){}ngOnInit() {这个.http.get("http://localhost:5000/MyRoute/GetEmployeeInfo").订阅(响应=> {this.employeeInfoTable = 响应；});}}

我的 template.html 文件如下所示:

<div style="height: 95%; overflow: auto;"><table class="MyNiceStyle"><头><tr><td>姓名</td><td>年龄</td><td>出生日期</td><td>地址</td><td>邮政编码</td><td>性别</td><td>薪水</td><td>职位</td></tr></thead><tr *ngFor="让员工信息表的数据"><td>{{data.Name}}</td><td>{{data.Age}}</td><td>{{data.DateOfBirth}}</td><td>{{data.Address}}</td><td>{{data.Postcode}}</td><td>{{data.Gender}}</td><td>{{data.Salary}}</td><td>{{data.JobTitle}}</td>

</mat-card>

它有效，但老实说，它看起来很糟糕.我想做的是使用mat-table:https://material.angular.io/components/table/examples

我已将 template.html 更新为:

<table mat-table [dataSource]="employeeInfoTable" class="mat-elevation-z8"><ng-container matColumnDef="名称"><th mat-h​​eader-cell *matHeaderCellDef>Name </th><td mat-cell *matCellDef="let element">{{element.Name}} </td></ng-容器><ng-container matColumnDef="DateOfBirth"><th mat-h​​eader-cell *matHeaderCellDef>出生日期</th><td mat-cell *matCellDef="let element">{{element.DateOfBirth}} </td></ng-容器><ng-container matColumnDef="地址"><th mat-h​​eader-cell *matHeaderCellDef>地址</th><td mat-cell *matCellDef="let element">{{element.Address}} </td></ng-容器><ng-container matColumnDef="邮政编码"><th mat-h​​eader-cell *matHeaderCellDef>邮政编码</th><td mat-cell *matCellDef="let element">{{element.Postcode}} </td><ng-container matColumnDef="性别"><th mat-h​​eader-cell *matHeaderCellDef>性别</th><td mat-cell *matCellDef="let element">{{element.Gender}} </td></ng-容器><ng-container matColumnDef="Salary"><th mat-h​​eader-cell *matHeaderCellDef>薪水</th><td mat-cell *matCellDef="let element">{{element.Salary}} </td></ng-容器><ng-container matColumnDef="JobTitle"><th mat-h​​eader-cell *matHeaderCellDef>JobTitle </th><td mat-cell *matCellDef="let element">{{element.JobTitle}} </td></ng-容器><tr mat-h​​eader-row *matHeaderRowDef="displayedColumns"></tr><tr mat-row *matRowDef="let row; columns:displayedColumns;"></tr></mat-card>

当我运行它时，我只看到一个空白屏幕.没有控制台错误或类似的错误.我需要对 template.html 和/或 component.ts 进行哪些更改才能显示数据?

解决方案

您需要进行这些更改.

在 component.ts 中:

import { HttpClient } from "@angular/common/http";从@angular/core"导入 { Component, OnInit };从@angular/forms"导入 { FormBuilder, FormGroup, Validators };从@angular/router"导入 { ActivatedRoute, Router };从@angular/material"导入 { MatTableDataSource };从../object.model"导入{对象}；@成分({styleUrls: ["./styles.scss"],templateUrl: "./template.html"})导出类 MyRouteData 实现 OnInit {员工信息表:对象[] = [];employeeInfoTableDataSource = new MatTableDataSource(this.employeeInfoTable);显示列:字符串[] = [姓名"，出生日期"，地址"，邮政编码"，性别"，薪水"职称"];构造函数(私有 http:HttpClient){}ngOnInit() {this.http.get("http://localhost:5000/MyRoute/GetEmployeeInfo").订阅(响应=> {this.employeeInfoTable = 响应；this.employeeInfoTableDataSource.data = this.employeeInfoTable;});}}

在 object.model.ts 中

导出接口对象{身份证号码;名称:字符串；出生日期:日期；地址:字符串；邮政编码:字符串；性别:字符串；薪水:人数；职位名称:字符串；}

在您的 .html 中

<table mat-table [dataSource]="employeeInfoTableDataSource" class="mat-elevation-z8"><ng-container matColumnDef="名称"><th mat-h​​eader-cell *matHeaderCellDef>名称</th><td mat-cell *matCellDef="let element">{{element.Name}} </td></ng-容器><ng-container matColumnDef="DateOfBirth"><th mat-h​​eader-cell *matHeaderCellDef>出生日期</th><td mat-cell *matCellDef="let element">{{element.DateOfBirth}} </td></ng-容器><ng-container matColumnDef="地址"><th mat-h​​eader-cell *matHeaderCellDef>地址</th><td mat-cell *matCellDef="let element">{{element.Address}} </td></ng-容器><ng-container matColumnDef="邮政编码"><th mat-h​​eader-cell *matHeaderCellDef>邮政编码</th><td mat-cell *matCellDef="let element">{{element.Postcode}} </td><ng-container matColumnDef="性别"><th mat-h​​eader-cell *matHeaderCellDef>性别</th><td mat-cell *matCellDef="let element">{{element.Gender}} </td></ng-容器><ng-container matColumnDef="Salary"><th mat-h​​eader-cell *matHeaderCellDef>薪水</th><td mat-cell *matCellDef="let element">{{element.Salary}} </td></ng-容器><ng-container matColumnDef="JobTitle"><th mat-h​​eader-cell *matHeaderCellDef>JobTitle </th><td mat-cell *matCellDef="let element">{{element.JobTitle}} </td></ng-容器><tr mat-h​​eader-row *matHeaderRowDef="displayedColumns"></tr><tr mat-row *matRowDef="let row; columns:displayedColumns;"></tr></mat-card>

Currently I have the following code to populate a table.

In component.ts:

import { HttpClient } from "@angular/common/http";
import { Component, OnInit } from "@angular/core";
import { FormBuilder, FormGroup, Validators } from "@angular/forms";
import { ActivatedRoute, Router } from "@angular/router";
import { MatTableDataSource } from "@angular/material/table";

@Component({
  styleUrls: ["./styles.scss"],
  templateUrl: "./template.html"
})
export class MyRouteData {
  employeeInfoTable: object;

  constructor(private http: HttpClient) {}

  ngOnInit() {
    this.http
      .get("http://localhost:5000/MyRoute/GetEmployeeInfo")
      .subscribe(response => {
        this.employeeInfoTable = response;
      });
  }
}

My template.html file looks like this:

<mat-card style="height: 98%">
  <div style="height: 95%; overflow: auto;">
      <table class="MyNiceStyle">
        <thead>
          <tr>
            <td>Name</td>
            <td>Age</td>
            <td>Date Of Birth</td>
            <td>Address</td>
            <td>Postcode</td>
            <td>Gender</td>
            <td>Salary</td>
            <td>Job Title</td>
          </tr>
        </thead>

        <tr *ngFor="let data of employeeInfoTable">
          <td>{{data.Name}}</td>
          <td>{{data.Age}}</td>
          <td>{{data.DateOfBirth}}</td>
          <td>{{data.Address}}</td>
          <td>{{data.Postcode}}</td>
          <td>{{data.Gender}}</td>
          <td>{{data.Salary}}</td>
          <td>{{data.JobTitle}}</td>
      </table>
    </div>

</mat-card>

which works but honestly, it looks terrible. What I would like to do is to use a mat-table: https://material.angular.io/components/table/examples

I've updated the template.html to:

<mat-card style="height: 98%">
    <table mat-table [dataSource]="employeeInfoTable" class="mat-elevation-z8">
        <ng-container matColumnDef="Name">
            <th mat-header-cell *matHeaderCellDef>Name </th>
            <td mat-cell *matCellDef="let element"> {{element.Name}} </td>
        </ng-container>
        <ng-container matColumnDef="DateOfBirth">
            <th mat-header-cell *matHeaderCellDef> DateOfBirth </th>
            <td mat-cell *matCellDef="let element"> {{element.DateOfBirth}} </td>
        </ng-container>
        <ng-container matColumnDef="Address">
            <th mat-header-cell *matHeaderCellDef> Address </th>
            <td mat-cell *matCellDef="let element"> {{element.Address}} </td>
        </ng-container>
        <ng-container matColumnDef="Postcode">
            <th mat-header-cell *matHeaderCellDef> Postcode </th>
            <td mat-cell *matCellDef="let element"> {{element.Postcode}} </td>

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

        <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
        <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
    </table>
</mat-card>

and when I run this I just see a blank screen. There are no console errors or anything like that. What changes do I need to make to template.html and/or component.ts to get the data to show?

解决方案

You need to make these changes.

In component.ts:

import { HttpClient } from "@angular/common/http";
import { Component, OnInit } from "@angular/core";
import { FormBuilder, FormGroup, Validators } from "@angular/forms";
import { ActivatedRoute, Router } from "@angular/router";
import { MatTableDataSource } from "@angular/material";
import { Object} from "../object.model";

@Component({
   styleUrls: ["./styles.scss"],
   templateUrl: "./template.html"
})
export class MyRouteData implements OnInit {
   employeeInfoTable : Object[] = [];
   employeeInfoTableDataSource = new MatTableDataSource(this.employeeInfoTable);
   displayedColumns: string[] = [
     "Name",
     "DateOfBirth",
     "Address",
     "Postcode",
     "Gender",
     "Salary"
     "JobTitle"
  ];

   constructor(private http: HttpClient) {}

   ngOnInit() {
      this.http.get("http://localhost:5000/MyRoute/GetEmployeeInfo")
          .subscribe(response => {
             this.employeeInfoTable = response;
             this.employeeInfoTableDataSource.data = this.employeeInfoTable;
      });
   }
}

In object.model.ts

export interface Object{
   id: number;
   Name: string;
   DateOfBirth: Date;
   Address: string;
   Postcode: string;
   Gender: string;
   Salary : number;
   JobTitle : string;
}

In your .html

<mat-card style="height: 98%">
  <table mat-table [dataSource]="employeeInfoTableDataSource" class="mat-elevation-z8">
    <ng-container matColumnDef="Name">
        <th mat-header-cell *matHeaderCellDef>Name </th>
        <td mat-cell *matCellDef="let element"> {{element.Name}} </td>
    </ng-container>
    <ng-container matColumnDef="DateOfBirth">
        <th mat-header-cell *matHeaderCellDef> DateOfBirth </th>
        <td mat-cell *matCellDef="let element"> {{element.DateOfBirth}} </td>
    </ng-container>
    <ng-container matColumnDef="Address">
        <th mat-header-cell *matHeaderCellDef> Address </th>
        <td mat-cell *matCellDef="let element"> {{element.Address}} </td>
    </ng-container>
    <ng-container matColumnDef="Postcode">
        <th mat-header-cell *matHeaderCellDef> Postcode </th>
        <td mat-cell *matCellDef="let element"> {{element.Postcode}} </td>

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

    <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
    <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
  </table>
</mat-card>

这篇关于在 angular 7 中，如何使用来自对象的数据填充 mat-table的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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