我的samplepage.component.html
<table mat-table [dataSource]="myDataArray" >
<!-- <ng-container [matColumnDef]="column" *ngFor="let column of displayedColumns" >
<th mat-header-cell *matHeaderCellDef > {{column}} </th>
<td mat-cell *matCellDef="let element" > {{element[column]}} </td>
</ng-container> -->
<ng-container matColumnDef="id">
<th mat-header-cell *matHeaderCellDef> Id. </th>
<td mat-cell *matCellDef="let element; let i = index;"> {{i+1}} </td>
</ng-container>
<ng-container matColumnDef="ticketnumb">
<th mat-header-cell *matHeaderCellDef> Ticket Number </th>
<td mat-cell *matCellDef="let element"> {{element.ticketnumb}} </td>
</ng-container>
<ng-container matColumnDef="actionsColumn">
<th mat-header-cell *matHeaderCellDef> Action </th>
<td mat-cell *matCellDef="let element; let j = index;">
<button mat-raised-button color="warn" focusable="false" (click)="deleteTicket(j)">
<i class="fa fa-times mat-icon"></i> Remove
</button>
</td>
</ng-container>
<tr mat-header-row *matHeaderRowDef="displayedColumns; sticky: true"></tr>
<tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
</table>
我的samplepage.component.ts
import { Component, OnInit, ViewChild } from '@angular/core';
@Component({
selector: 'app-batchticketvalidation',
templateUrl: './batchticketvalidation.component.html',
styleUrls: ['./batchticketvalidation.component.css']
})
export class BatchticketvalidationComponent implements OnInit {
constructor() { }
ngOnInit() {
}
displayedColumns = ['id', 'ticketnumb', 'actionsColumn'];
dataSource: PeriodicElement[] = ELEMENT_DATA;
private myDataArray: any;
private tempTicketCount: number = 0;
deleteTicket(rowid: number){
if (rowid > -1) {
this.myDataArray.splice(rowid, 1);
}
}
}
export interface PeriodicElement {
id: number;
ticketnumb: string;
actionsColumn: any;
}
const ELEMENT_DATA: PeriodicElement[] = [
];
我是棱角分明的新人。我需要帮助从表中删除特定行,一旦删除行,表应该刷新或者应该显示现有数据。我只有静态行。这只是一个简单的模型html,我想向客户展示。
每行都有删除按钮,点击删除按钮我调用deleteTicket(rowid)。
当触发deleteTicket方法时,该行不会从Ui中删除,但是当我控制this.myDataArray时,数据将从对象中删除。
我尝试了所有可能性。
请帮忙
在splice()之后通过item的索引,您应该更新数据源。
const index = this.dataSource.data.indexOf(item.id);
this.dataSource.data.splice(index, 1);
**this.dataSource._updateChangeSubscription();**
删除所选行后,您必须再次重新分配matDataTable。
deleteTicket(rowid: number){
// raw_data is the array of data that you getting from the db.
this.raw_data.splice(rowid,0)
this.dataSource = new MatTableDataSource(this.users);
}
我建议使用MatTableDataSource
。
dataSource: MatTableDataSource = new MatTableDataSource<T>(ELEMENT_DATA);
deleteFunction(item){
// find item and remove ist
dataSource.data.splice(this.dataSource.data.indexOf(item.id), 1);
}