类型错误:table.renderRows 不是函数 [英] TypeError: table.renderRows is not a function

问题描述

我使用带有数组的 Angular 材质数据表作为数据源.我会使用文档中提到的 renderRows() 方法更新我的表格，每次数据更改.

我有我的 ts 文件

import { Component, OnInit } from '@angular/core';从 '@angular/material' 导入 { MatTableDataSource };从'../ajouttext.service'导入{AjouttextService}；从@angular/cdk/collections"导入{数据源}；import { Observable } from "rxjs/Observable";从'../model'导入{nomchamp}；@成分({选择器:'应用程序数据表'，templateUrl: './datatable.component.html',styleUrls: ['./datatable.component.css']})导出类 DatatableComponent 实现 OnInit {构造函数(私有数据服务:AjouttextService){}数据:nomchamp[] = [{ id: "33", text: "HAHA" }, { id: "55", text: "bzlblz" }];displayColumns = ['text'];数据源 = 新的 MatTableDataSource(this.data);//新用户数据源(this.dataService);应用过滤器(过滤器值:字符串){filterValue = filterValue.trim();//去除空格filterValue = filterValue.toLowerCase();//MatTableDataSource 默认为小写匹配}ngOnInit() {}ajoutText(newtext: string, table: any) { \\ADD TEXT让 noew: nomchamp = { id: "44", text: newtext };this.data.push(new);table.renderRows();}}

有HTML 文件，我在其中声明#table 变量并将其传递到ajoutText 函数

<mat-form-field class="textinput"><input #newtext matInput placeholder="Ajoutez votre texte" value=""></mat-form-field><button type="button" mat-raised-button color="primary" (click)="ajoutText(newtext.value,table)">Ajouter</button></表单><p>{{text}}</p><div class="example-container mat-elevation-z8"><mat-table #table [dataSource]="dataSource"><!-- 位置列--><ng-container matColumnDef="text"><mat-h​​eader-cell *matHeaderCellDef>号</mat-h​​eader-cell><mat-cell *matCellDef="let element">{{element.text}} </mat-cell></ng-容器><mat-h​​eader-row *matHeaderRowDef="displayedColumns"></mat-h​​eader-row><mat-row *matRowDef="let row; columns:displayedColumns;"></mat-row></mat-table>

当我在输入中添加文本并单击按钮时出现此错误

ERROR TypeError: table.renderRows 不是函数

解决方案

看来你需要更新你的 @angular-cdk 打包到 5.2.

查看源代码后，renderRows 只是从那个版本开始添加的:

5.1 版 CdkTable 源码 -> 不包含 renderRows 方法.

5.2 版 CdkTable 源码code -> 包含一个 renderRows 方法.

(注意MatTable 扩展了CdkTable.)

I'm using Angular material datatable with array as datasource. I would update my table every data change using renderRows() method as mentionned in the doc.

I have my ts file

import { Component, OnInit } from '@angular/core';
import { MatTableDataSource } from '@angular/material';
import { AjouttextService } from '../ajouttext.service';
import { DataSource } from "@angular/cdk/collections";
import { Observable } from "rxjs/Observable";
import { nomchamp } from '../model';

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

  constructor(private dataService: AjouttextService) { }
  data: nomchamp[] = [{ id: "33", text: "HAHA" }, { id: "55", text: "bzlblz" }];

  displayedColumns = ['text'];
  dataSource = new MatTableDataSource(this.data);
  //new UserDataSource(this.dataService);


  applyFilter(filterValue: string) {
    filterValue = filterValue.trim(); // Remove whitespace
    filterValue = filterValue.toLowerCase(); // MatTableDataSource defaults to lowercase matches
  }
  ngOnInit() {
  }
  ajoutText(newtext: string, table: any) { \\ADD TEXT
    let noew: nomchamp = { id: "44", text: newtext };
    this.data.push(new);
    table.renderRows();
  }
}

There HTML file where I declare #table variable and pass it in ajoutText function

<form class="form">
  <mat-form-field class="textinput">
    <input #newtext matInput placeholder="Ajoutez votre texte" value="">
  </mat-form-field>
  <button type="button" mat-raised-button color="primary" (click)="ajoutText(newtext.value,table)">Ajouter</button>

</form>
<p>{{text}}</p>
<div class="example-container mat-elevation-z8">
  <mat-table #table [dataSource]="dataSource">
    <!-- Position Column -->
    <ng-container matColumnDef="text">
      <mat-header-cell *matHeaderCellDef> No. </mat-header-cell>
      <mat-cell *matCellDef="let element"> {{element.text}} </mat-cell>
    </ng-container>
    <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
    <mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
  </mat-table>
</div>

When I add text in input and click the button I get this error

ERROR TypeError: table.renderRows is not a function

解决方案

Seems like you need to update your @angular-cdk package to 5.2.

After checking the source code, renderRows was only added since that version:

5.1 version of CdkTable source code -> does not contain a renderRows method.

5.2 version of CdkTable source code -> contains a renderRows method.

(Note that MatTable extends CdkTable.)

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