如何使用复选框角度2绑定数据？

debugcn 发表于 Dev

用户10775755

JSON

[ {
  "code" : "TEST",
  "projectId" : "PROJECT",
  "name" : "TEST",
  "description" : "test",
  "level1" : "1 ",
  "level2" : "2 ",
  "level3" : "3",
  "level4" : "4",
  "level5" : "5",
  "active" : false
}, {
  "code" : "test",
  "projectId" : "PROJECT",
  "name" : "Test",
  "description" : "test 11",
  "level1" : "1 ",
  "level2" : "2 ",
  "level3" : "3",
  "level4" : "4",
  "level5" : "5",
  "active" : true
}, {
  "code" : "asdasd2122",
  "projectId" : "PROJECT",
  "name" : "TEST12",
  "description" : "ashdasdhl",
  "level1" : "1 ",
  "level2" : "2 ",
  "level3" : "3",
  "level4" : "4",
  "level5" : "5",
  "active" : false
}, {
  "code" : "test1a",
  "projectId" : "PROJECT",
  "name" : "TEST122",
  "description" : "a,sndkajlskdjlkajd",
  "level1" : "1 ",
  "level2" : "2 ",
  "level3" : "3",
  "level4" : "4",
  "level5" : "5",
  "active" : true
}, {
  "code" : "dasdasd",
  "projectId" : "PROJECT",
  "name" : "test123123",
  "description" : "asdasdasd",
  "level1" : "1 ",
  "level2" : "2 ",
  "level3" : "3",
  "level4" : "4",
  "level5" : "5",
  "active" : true
}, 
 {
  "code" : "asdasdTES",
  "projectId" : "PROJECT",
  "name" : "TEST123",
  "description" : "asdasdasd",
  "level1" : "1 ",
  "level2" : "2 ",
  "level3" : "3",
  "level4" : "4",
  "level5" : "5",
  "active" : true
} ]

HTML

            <mat-table [dataSource]="offersColumnRowData" matSort matSortActive="NAME">

          <ng-container matColumnDef="SELECT">
            <mat-header-cell *matHeaderCellDef> SELECT </mat-header-cell>
            <mat-cell *matCellDef="let element">
              <mat-checkbox>
              </mat-checkbox>
            </mat-cell>
          </ng-container>

          <ng-container matColumnDef="NAME">
            <mat-header-cell *matHeaderCellDef> NAME </mat-header-cell>
            <mat-cell *matCellDef="let element">{{ element.name }} </mat-cell>
          </ng-container>

          <ng-container matColumnDef="CODE">
            <mat-header-cell *matHeaderCellDef> CODE </mat-header-cell>
            <mat-cell *matCellDef="let element">{{ element.code }} </mat-cell>
          </ng-container>

          <ng-container matColumnDef="DESCRIPTION">
            <mat-header-cell *matHeaderCellDef> DESCRIPTION </mat-header-cell>
            <mat-cell *matCellDef="let element"> {{ element.description}} </mat-cell>
          </ng-container>

          <ng-container matColumnDef="CREATEDATE">
            <mat-header-cell *matHeaderCellDef> CREATEDATE </mat-header-cell>
            <mat-cell *matCellDef="let element"> </mat-cell>
          </ng-container>

          <ng-container matColumnDef="UNAME">
            <mat-header-cell *matHeaderCellDef> UNAME </mat-header-cell>
            <mat-cell *matCellDef="let element"> </mat-cell>
          </ng-container>

          <ng-container matColumnDef="ISACTIVE">
            <mat-header-cell *matHeaderCellDef> ISACTIVE </mat-header-cell>
            <mat-cell *matCellDef="let element">
              <mat-checkbox type="checkbox">
              </mat-checkbox>
            </mat-cell>
          </ng-container>

          <mat-header-row *matHeaderRowDef="offersColumns"></mat-header-row>
          <mat-row *matRowDef="let row; columns: offersColumns;" (mouseover)="row.hovered = true" (mouseout)="row.hovered = false"></mat-row>
        </mat-table>

我正在尝试将值绑定到复选框中！布尔形式的值 (TRUE|FALSE)

我试图绑定 with 复选框，但它不起作用

说明：转到我的 stackblitz -> 如果我从 SELECT 列中选择任何复选框，则应选择代码列（我只想在控制台日志中打印选择列行代码）

2) 如何将布尔值绑定到复选框列中，如果活动为假，则列名称为 ISACTIVE 如果活动为真，则未选中复选框 -> 选中复选框！

这是我的stackblits链接，对您来说很容易！

https://stackblitz.com/edit/angular-gbf9kz-a2s4zc?file=app%2Ftable-basic-example.ts

漂亮的苍蝇

根据您要处理的复杂程度，您可以采用表单方法（推荐），也可以向复选框添加一个简单的更改处理程序。

成分

selectedCodes: string[] = [];

receiveCheckboxChange(code: string, value: MatCheckboxChange) {
   console.log(code, value.checked);
   this.updateCodes(code, value.checked);
}

updateCodes(code: string, selected: boolean) {
   const inArrayIndex: number = this.selectedCodes.indexOf(code);
   if (selected && inArrayIndex === -1) {
      this.selectedCodes.push(code);
   } else if (inArrayIndex !== -1) {
      this.selectedCodes.splice(inArrayIndex, 1);
   }
}

isSelected(code: string) {
    return this.selectedCodes.indexOf(code) !== -1;
}

模板

<ng-container matColumnDef="ISACTIVE">
    <mat-header-cell *matHeaderCellDef> ISACTIVE </mat-header-cell>
        <mat-cell *matCellDef="let element">
            <mat-checkbox type="checkbox" (change)="receiveCheckboxChange(element.code, $event)" [checked]="isSelected(element.code)">
            </mat-checkbox>
        </mat-cell>
</ng-container>

这里的关键部分是(change)="receiveCheckboxChange(element.code, $event)"- 您可以从element或整个element对象本身向您的函数提供您想要的任何信息。然后由您决定从那里做任何您想做的事情。

然后，您将在变量中拥有一组选定的代码selectedCodes。你从那里对他们做什么，取决于你。

闪电战：https : //stackblitz.com/edit/angular-gbf9kz-sgtrtv

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