nz-table复选功能改造(整行可选)

如果你用到了nz-table组件,而且有勾选列表的需求时,就可以用该组件自带的nzShowCheckbox勾选属性,用法如下

<nz-table
      #rowSelectionTable
      nzShowPagination
      nzShowSizeChanger
      [nzData]=""
      (nzCurrentPageDataChange)=""
    >
      <thead>
        <tr>
          <th
            nzShowCheckbox
            [(nzChecked)]=""
            [nzIndeterminate]=""
            (nzCheckedChange)=""
          ></th>
        </tr>
      </thead>
      <tbody>
        <tr *ngFor="let data of rowSelectionTable.data">
          <td
            nzShowCheckbox
            [(nzChecked)]=""
            (nzCheckedChange)=""
          ></td>
        </tr>
      </tbody>
</nz-table>

第一列是联动的选择框,增加 nzShowCheckbox 后,th 获得和 nz-checkbox 一样的功能,选择后进行操作,完成后清空选择,请注意:数据逻辑需要自行控制。

数据方面组件案例定义了一个mapOfCheckedId对象,可以把数据里用于唯一标识的id或其他字段的值存入该对象,然后通过改变它的值(boolean)去控制列表行要不要勾选。

//ts文件定义

mapOfCheckedId: { [key: string]: boolean } = {};

//html文件:

<nz-table #rowSelectionTable nzShowPagination nzShowSizeChanger [nzData]="" (nzCurrentPageDataChange)="" > <thead> <tr> <th nzShowCheckbox [(nzChecked)]="" [nzIndeterminate]="" (nzCheckedChange)="" ></th> </tr> </thead> <tbody> <tr *ngFor="let data of rowSelectionTable.data"> <td nzShowCheckbox [(nzChecked)]="mapOfCheckedId[data.id]" (nzCheckedChange)="" ></td> </tr> </tbody> </nz-table>

列表勾选除了要控制数据逻辑,还需自行设置样式。组件提供了[nzIndeterminate]属性控制勾选样式(主要用于设置th的复选框css),th的复选框可以有三种状态:空、‘√’、‘-’,这里需要和它的[nzChecked]属性配合使用:

[nzIndeterminate] [nzChecked] css显示
true true -
false true
false false 无css

ts:

export class InterviewListComponent implements OnInit{
  mapOfCheckedId: { [key: string]: boolean } = {}; allListCheck
= { allChecked: false, indeterminate: false }; constructor() { } ngOnInit(){ }

  //获取表格数据
  getTableList(){
    //请求...
    this.dataTable = res.data
    this.refreshStatus() //每次请求完数据重置表格勾选状态
  }
   //表格选中的样式处理
    refreshStatus(): void {
       this.dataTable.forEach((item, i) => {
          if (this.mapOfCheckedId[item.candidateId]) {
             if (!this.checkedData.some(items => items.candidateId === item.candidateId)) { this.checkedData.push(item); }
         } else {
             this.checkedData = this.checkedData.filter(items => items.candidateId !== item.candidateId);
          }
       });
       //设置全选checkbox的样式
       if (this.dataTable.every(item => this.mapOfCheckedId[item.candidateId] )){
         this.allListCheck.allChecked = true;
          this.allListCheck.indeterminate = false;
       }else{
          this.allListCheck.allChecked = false;
          this.allListCheck.indeterminate = this.dataTable.some(item => this.mapOfCheckedId[item.candidateId]);
       }
       this.copyCheckData = JSON.parse(JSON.stringify(this.checkedData));
    }
    checkAll(value: boolean): void {
          this.dataTable.forEach(item => this.mapOfCheckedId[item.candidateId] = value);
        this.refreshStatus();
   }
    clearChecked(){
       this.checkedData = [];
       this.copyCheckData = [];
       this.mapOfCheckedId = {};
       this.allListCheck.allChecked = false;
       this.allListCheck.indeterminate = false;
    }
}

html:

<nz-table [nzLoading]="loading" #activeTable [nzData]="dataTable" [nzShowPagination]=false [nzFrontPagination]="false">
    <thead>
       <tr>
          <th  width="34" nzShowCheckbox [nzChecked]="allListCheck.allChecked" [nzIndeterminate]="allListCheck.indeterminate" (nzCheckedChange)="checkAll($event)"></th>
        </tr>
    </thead>
    <tbody>
        <tr *ngFor="let data of activeTable.data;let i=index" [ngClass]="{'checked':mapOfCheckedId[data.candidateId]}">
          <td
              nzShowCheckbox
              [(nzChecked)]="mapOfCheckedId[data.candidateId]"(nzCheckedChange)="refreshStatus()"
            ></td>            
        </tr>
    </tbody>
</nz-table>

这样就可以实现表格复选功能了,但是只能在点击复选框时才能进行勾选,想要整行都可以,就需要再改造下:

ts:

export class InterviewListComponent implements OnInit{
  mapOfCheckedId: { [key: string]: boolean } = {}; allListCheck = { allChecked: false, indeterminate: false }; constructor() { } ngOnInit(){}
  selectedTr(data){
      this.mapOfCheckedId[data.candidateId] = !this.mapOfCheckedId[data.candidateId];
      this.refreshStatus();
  }
   //表格选中的样式处理
    refreshStatus(): void {
       this.dataTable.forEach((item, i) => {
          if (this.mapOfCheckedId[item.candidateId]) {
             if (!this.checkedData.some(items => items.candidateId === item.candidateId)) { this.checkedData.push(item); }
         } else {
             this.checkedData = this.checkedData.filter(items => items.candidateId !== item.candidateId);
          }
       });
       //设置全选checkbox的样式
       if (this.dataTable.every(item => this.mapOfCheckedId[item.candidateId] )){
         this.allListCheck.allChecked = true;
          this.allListCheck.indeterminate = false;
       }else{
          this.allListCheck.allChecked = false;
          this.allListCheck.indeterminate = this.dataTable.some(item => this.mapOfCheckedId[item.candidateId]);
       }
       this.copyCheckData = JSON.parse(JSON.stringify(this.checkedData));
    }
    checkAll(value: boolean): void {
      let newValue = !value;
        this.dataTable.forEach(item => this.mapOfCheckedId[item.candidateId] = newValue);
        this.refreshStatus();
   }
    clearChecked(){
       this.checkedData = [];
       this.copyCheckData = [];
       this.mapOfCheckedId = {};
       this.allListCheck.allChecked = false;
       this.allListCheck.indeterminate = false;
    }
}

html:

<nz-table [nzLoading]="loading" #activeTable [nzData]="dataTable" [nzShowPagination]=false [nzFrontPagination]="false">
    <thead>
       <tr (click)="checkAll(allListCheck.allChecked)">
            <th  width="34" nzShowCheckbox [nzChecked]="allListCheck.allChecked" [nzIndeterminate]="allListCheck.indeterminate" (click)="checkAll(allListCheck.allChecked);$event.stopPropagation()"></th> </tr> </thead> <tbody> <tr *ngFor="let data of activeTable.data;let i=index" [ngClass]="{'checked':mapOfCheckedId[data.candidateId]}" (click)="selectedTr(data)">   <td nzShowCheckbox [(nzChecked)]="mapOfCheckedId[data.candidateId]"   (click)="refreshStatus();$event.stopPropagation()" ></td> </tr> </tbody> </nz-table>

说明一下:在tr上设置了点击事件后,td复选框原本的(nzCheckedChange)就不能再用了,需要改成click事件。

原文地址:https://www.cnblogs.com/myyouzi/p/12200136.html