FilterPredicate Table by Colomn with Angular Material [英] FilterPredicate Table by Colomn with Angular Material
问题描述
我想使用谓词过滤器按列过滤我的 mat-table 结果.我已经在使用一个简单的过滤器,但它过滤了所有列中的所有数据.我搜索类似的主题,但我不知道如何使用它.我尝试为所有列重复我的代码,但不起作用..
见下面的代码:
<input matInput (keyup)="applyFilter($event.target.value)" placeholder="Filter"></mat-form-field><div class="example-container mat-elevation-z8"><div class="example-header"><div><mat-table [dataSource]="dataSource" matSort><ng-container matColumnDef="aa"><mat-header-cell *matHeaderCellDef mat-sort-header>aa title</mat-header-cell><mat-cell *matCellDef="let user">{{user.aa}} </mat-cell></ng-容器><ng-container matColumnDef="bb"><mat-header-cell *matHeaderCellDef mat-sort-header>bb 倾斜 </mat-header-cell><mat-cell *matCellDef="let user">{{user.bb}} </mat-cell></ng-容器><mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row><mat-row *matRowDef="let row; columns:displayedColumns;"></mat-row></mat-table><mat-paginator [pageSizeOptions]="[5, 10, 25, 100]"></mat-paginator>
和我的.ts:
导出类 MynewComponent 实现 OnInit {数据源 = 新的 MatTableDataSource();displayColumns = ['aa', 'bb'];@ViewChild(MatPaginator) 分页器:MatPaginator;@ViewChild(MatSort) 排序:MatSort;构造函数(私有材料服务:材料服务){}ngOnInit() {this.materialService.getUser().subscribe(value =>{this.dataSource.data = value;});this.dataSource.paginator = this.paginator;this.dataSource.sort = this.sort;}应用过滤器(过滤器值:字符串){filterValue = filterValue.trim();//去除空格filterValue = filterValue.toLowerCase();//数据源默认为小写匹配this.dataSource.filter = filterValue;如果(this.dataSource.paginator){this.dataSource.paginator.firstPage();}}}导出类 UserDataSource 扩展了 DataSource{构造函数(私有材料服务:材料服务){极好的();}connect(): Observable{返回 this.materialService.getUser();}断开连接(){}}
HTML 在 applyFilter
中添加 7 个 diff 输入字段并传递输入值 &该列的键作为字符串
<input matInput (keyup)="applyFilter($event.target.value, 'aa')" placeholder="过滤器"></mat-form-field><mat-form-field><input matInput (keyup)="applyFilter($event.target.value, 'bb')" placeholder="Filter"></mat-form-field><mat-form-field><input matInput (keyup)="applyFilter($event.target.value, 'col3')" placeholder="Filter"></mat-form-field><mat-form-field><input matInput (keyup)="applyFilter($event.target.value, 'col4')" placeholder="Filter"></mat-form-field><mat-form-field><input matInput (keyup)="applyFilter($event.target.value, 'col5')" placeholder="过滤器"></mat-form-field><mat-form-field><input matInput (keyup)="applyFilter($event.target.value, 'col6')" placeholder="Filter"></mat-form-field><mat-form-field><input matInput (keyup)="applyFilter($event.target.value, 'col7')" placeholder="Filter"></mat-form-field>
<块引用>
您可以根据您的设计要求找到其他编写 HTML 的方式.
组件
创建具有 key
的过滤器对象:列键 &value
:过滤值
filterObj = {};应用过滤器(过滤器值:字符串,键:字符串){this.filterObj = {值:filterValue.trim().toLowerCase(),钥匙:钥匙}this.dataSource.filter = filterValue;如果(this.dataSource.paginator){this.dataSource.paginator.firstPage();}}
更新 filterPredicate
为:
this.dataSource.filterPredicate = (data, filter) =>{if(data[this.filterObj['key']] && this.filterObj['key']) {返回数据[this.filterObj['key']].toLowerCase().includes(this.filterObj['value']);}返回假;}
I would like to filter my mat-table result by column using the predicate filter. Im already using a simple filter but it filtering all the data in all the column. I search for similar topics but i don't know how use it. I try to repeat my code for all the column but doesn't work..
See code below :
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value)" placeholder="Filter">
</mat-form-field>
<div class="example-container mat-elevation-z8">
<div class="example-header">
<div>
<mat-table [dataSource]="dataSource" matSort>
<ng-container matColumnDef="aa">
<mat-header-cell *matHeaderCellDef mat-sort-header>aa title</mat-header-cell>
<mat-cell *matCellDef="let user"> {{user.aa}} </mat-cell>
</ng-container>
<ng-container matColumnDef="bb">
<mat-header-cell *matHeaderCellDef mat-sort-header> bb tilte </mat-header-cell>
<mat-cell *matCellDef="let user"> {{user.bb}} </mat-cell>
</ng-container>
<mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
<mat-row *matRowDef="let row; columns: displayedColumns;"></mat-row>
</mat-table>
<mat-paginator [pageSizeOptions]="[5, 10, 25, 100]"></mat-paginator>
</div>
</div>
</div>
and my .ts :
export class MynewComponent implements OnInit {
dataSource = new MatTableDataSource();
displayedColumns = ['aa', 'bb'];
@ViewChild(MatPaginator) paginator: MatPaginator;
@ViewChild(MatSort) sort: MatSort;
constructor(private materialService: MaterialService) {}
ngOnInit() {
this.materialService.getUser().subscribe(value =>{this.dataSource.data = value;});
this.dataSource.paginator = this.paginator;
this.dataSource.sort = this.sort;
}
applyFilter(filterValue: string) {
filterValue = filterValue.trim(); // Remove whitespace
filterValue = filterValue.toLowerCase(); // Datasource defaults to lowercase matches
this.dataSource.filter = filterValue;
if (this.dataSource.paginator) {
this.dataSource.paginator.firstPage();
}
}
}
export class UserDataSource extends DataSource<any> {
constructor(private materialService: MaterialService) {
super();
}
connect(): Observable<MaterialModel[]> {
return this.materialService.getUser();
}
disconnect() {}
}
HTML Add 7 diff input fields also in applyFilter
pass input value & a key of that column as string
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value, 'aa')" placeholder="Filter">
</mat-form-field>
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value, 'bb')" placeholder="Filter">
</mat-form-field>
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value, 'col3')" placeholder="Filter">
</mat-form-field>
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value, 'col4')" placeholder="Filter">
</mat-form-field>
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value, 'col5')" placeholder="Filter">
</mat-form-field>
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value, 'col6')" placeholder="Filter">
</mat-form-field>
<mat-form-field>
<input matInput (keyup)="applyFilter($event.target.value, 'col7')" placeholder="Filter">
</mat-form-field>
You can find other ways of writing HTML according to your requirement of design.
component
Create filter obj having key
: Column key & value
: filter value
filterObj = {};
applyFilter(filterValue: string, key: string) {
this.filterObj = {
value: filterValue.trim().toLowerCase(),
key: key
}
this.dataSource.filter = filterValue;
if (this.dataSource.paginator) {
this.dataSource.paginator.firstPage();
}
}
update filterPredicate
as:
this.dataSource.filterPredicate = (data, filter) => {
if(data[this.filterObj['key']] && this.filterObj['key']) {
return data[this.filterObj['key']].toLowerCase().includes(this.filterObj['value']);
}
return false;
}
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