ngx-datatable-具有操作按钮的自定义列 [英] ngx-datatable - custom columns with action buttons

问题描述

我有一个表( ngx-datatable )，我想在其中定义一个操作"列中，然后将放置用于CRUD操作的按钮.

创建列并放置按钮有效，但是我遇到的问题是，在触发函数中不再能够识别所选行及其列中的值.

这是我的模板:

 <div class="col-12">
  <ngx-datatable
    #table
    class="material"
    [rowHeight]="'auto'"
    [columns]="columns"
    [columnMode]="'force'"
    [headerHeight]="50"
    [footerHeight]="50"
    [limit]="10"
    [rows]="cars?.content"
    [selected]="selected"
    [selectionType]="'multi'">
  </ngx-datatable>
</div>
 

这是带有按钮的我的自定义模板:

 <ng-template #buttonsTemplate let-row="row" let-value="value" let-button="column.actions">
  <button class="btn btn-transparent" (click)='onSelect($event)'><i class="rb-ic rb-ic-add-frame"></i></button>
  <button class="btn bt n-transparent" (click)='onSelect($event)><i class="rb-ic rb-ic-abort-frame"></i></button>
  <button class="btn btn-transparent" (click)='onSelect($event)><i class="rb-ic rb-ic-reset"></i></button>
  <button class="btn btn-transparent" (click)='onSelect($event)><i class="rb-ic rb-ic-agility"></i></button>
</ng-template>
 

我的组件(.ts文件)的结构如下:

 export class MyComponent implements OnInit, OnDestroy {
  @ViewChild('buttonsTemplate') buttonsTemplate: TemplateRef<any>;
  columns = [];

  ngOnInit() {
    this.columns = [
    {prop: 'id', name: 'Id'},
    {prop: 'serial_number', name: 'Serial Number'},
    {prop: 'actions', name: 'Actions', cellTemplate: this.buttonsTemplate}
    ];
  }

  // This method should be called after clicking an action button
  onSelect({selected}) {
    console.log('Array of selected vehicles', selected);
  }
}
 

当前在控制台中发生此错误:

错误TypeError:无法读取属性"serial_number" 的未定义

我做错了什么? 官方文档和 <ngx-datatable-column *ngFor="let column of columns; let i = index;" name="{{column.name}}" prop="{{column.prop}}"> <ng-template #buttonsTemplate let-row="row" let-value="value" ngx-datatable-cell-template> <button class="btn btn-transparent" (click)='onSelect(row)'><i class="rb-ic rb-ic-add-frame"></i></button> </ng-template> </ngx-datatable-column>

组件(功能):

 onSelect({selected}) {
  console.log('Array of selected vehicles', selected);
}
 

解决方案

我正在使用ngx-datatable库，并且我的项目与您的项目具有相似的设置，因此我相信我知道您的问题出处了.

如果您的<ng-template>没有嵌套在<ngx-datatable-column>中，则应将其放入其中.另外，在click事件绑定上，您应该将row值传递到您的onSelect()方法中，因为您试图访问行数据.您还需要在<ng-template>中使用ngx-datatable-cell-template指令.

这是您应该进行的更改:

 <ngx-datatable 
[rows]="rows" 
class="material" 
[loadingIndicator]="loadingIndicator"
[columnMode]="'force'" 
[headerHeight]="50" 
[footerHeight]="50" 
[rowHeight]="'auto'"
[columns]="columns" 
[reorderable]="reorderable">

  <ngx-datatable-column *ngFor="let column of columns; let i = index;" name="{{column.name}}" prop="{{column.prop}}">
    <ng-template let-value="value" let-row="row" *ngIf="column.name==='Actions'" ngx-datatable-cell-template>
      <span>
        <button style="background-color:red;height:15px;" (click)='onSelectRed(row)'><i class="rb-ic rb-ic-add-frame"></i></button>
        <button style="background-color:blue;height:15px;" class="btn" (click)='onSelectBlue(value)'><i class="rb-ic rb-ic-add-frame"></i></button>
      </span>
    </ng-template>
  </ngx-datatable-column>
</ngx-datatable>
 

在component.ts上，您应该能够访问整行的数据或属性本身的值，具体取决于您在click方法上绑定的值.

 onSelectRed(row) {
  console.log(row);
}

onSelectBlue(value) {
  console.log(value);
}
 

我已经在此处创建了一个演示.如您所见，row的值和绑定的属性(id)可以在行按钮本身中访问.

I have a table (ngx-datatable) in which I want to define an "actions" column in which buttons will then be placed for CRUD operations.

Creating the column and placing the buttons worked, but I have the problem that the selected row and the values ​​in its columns are no longer recognized inside my triggered function.

Here is my template:

<div class="col-12">
  <ngx-datatable
    #table
    class="material"
    [rowHeight]="'auto'"
    [columns]="columns"
    [columnMode]="'force'"
    [headerHeight]="50"
    [footerHeight]="50"
    [limit]="10"
    [rows]="cars?.content"
    [selected]="selected"
    [selectionType]="'multi'">
  </ngx-datatable>
</div>

Here is my custom template with the buttons:

<ng-template #buttonsTemplate let-row="row" let-value="value" let-button="column.actions">
  <button class="btn btn-transparent" (click)='onSelect($event)'><i class="rb-ic rb-ic-add-frame"></i></button>
  <button class="btn bt n-transparent" (click)='onSelect($event)><i class="rb-ic rb-ic-abort-frame"></i></button>
  <button class="btn btn-transparent" (click)='onSelect($event)><i class="rb-ic rb-ic-reset"></i></button>
  <button class="btn btn-transparent" (click)='onSelect($event)><i class="rb-ic rb-ic-agility"></i></button>
</ng-template>

My component (.ts file) is structured like this:

export class MyComponent implements OnInit, OnDestroy {
  @ViewChild('buttonsTemplate') buttonsTemplate: TemplateRef<any>;
  columns = [];

  ngOnInit() {
    this.columns = [
    {prop: 'id', name: 'Id'},
    {prop: 'serial_number', name: 'Serial Number'},
    {prop: 'actions', name: 'Actions', cellTemplate: this.buttonsTemplate}
    ];
  }

  // This method should be called after clicking an action button
  onSelect({selected}) {
    console.log('Array of selected vehicles', selected);
  }
}

Currently this error occurs in the console:

ERROR TypeError: Cannot read property 'serial_number' of undefined

What am I doing wrong? The official documentation and demo page doesn't helped me..

---

Approach from @wentjun (not working: button not visibile inside column)

The Template:

<ngx-datatable-column *ngFor="let column of columns; let i = index;" name="{{column.name}}" prop="{{column.prop}}">
  <ng-template #buttonsTemplate let-row="row" let-value="value" ngx-datatable-cell-template>
    <button class="btn btn-transparent" (click)='onSelect(row)'><i class="rb-ic rb-ic-add-frame"></i></button>
  </ng-template>
</ngx-datatable-column>

The Component (function):

onSelect({selected}) {
  console.log('Array of selected vehicles', selected);
}

解决方案

I am using the ngx-datatable library, and I have a similar setup to your project, thus I believe I see where your problem is coming from.

If your <ng-template> is not nested within the <ngx-datatable-column>,you should put it within it. In addition, on your click event binding, you should be passing the row values into your onSelect() methods, since you are trying to access the row data. You will need to use the ngx-datatable-cell-template directive within your <ng-template> too.

This are the changes you should be making:

<ngx-datatable 
[rows]="rows" 
class="material" 
[loadingIndicator]="loadingIndicator"
[columnMode]="'force'" 
[headerHeight]="50" 
[footerHeight]="50" 
[rowHeight]="'auto'"
[columns]="columns" 
[reorderable]="reorderable">

  <ngx-datatable-column *ngFor="let column of columns; let i = index;" name="{{column.name}}" prop="{{column.prop}}">
    <ng-template let-value="value" let-row="row" *ngIf="column.name==='Actions'" ngx-datatable-cell-template>
      <span>
        <button style="background-color:red;height:15px;" (click)='onSelectRed(row)'><i class="rb-ic rb-ic-add-frame"></i></button>
        <button style="background-color:blue;height:15px;" class="btn" (click)='onSelectBlue(value)'><i class="rb-ic rb-ic-add-frame"></i></button>
      </span>
    </ng-template>
  </ngx-datatable-column>
</ngx-datatable>

And on your component.ts, you should be able to access the data of the entire row, or the value of the property itself, depending on the value you have binded on the click method.

onSelectRed(row) {
  console.log(row);
}

onSelectBlue(value) {
  console.log(value);
}

I have created a demo over here. As you can see, the values of row and the binded property (id) can be accessed within the row buttons itself.

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