在ngFor中动态添加锚定名称组件

Posted 2021-05-01

我正在开发一个Angular 2+应用程序，我正在尝试动态生成尽可能多的Material Datepicker（我将在FormArray中生成每个输入一个）。

<form [formGroup]="varDataForm" (ngSubmit)="onSubmit()" novalidate>
    <div formArrayName="aggLevels"
            *ngFor="let agLevel of varDataForm.get('aggLevels')?.controls; let aggLevelRow = index;">
        <div [formGroupName]="aggLevelRow">
            <label>{{agLevel?.get('aggregationLevelName')?.value}}</label>
            <div formArrayName="variableDataForLevel"
                    *ngFor="let vardata of agLevel.get('variableDataForLevel')?.controls; let rowIndex = index;">
                <div [formGroupName]="rowIndex">
                    <select formControlName="variableDataId">
                        <option *ngFor="let gs1 of gs1AIs" [value]="gs1.id">{{gs1.description}}</option>
                    </select>
                    <input formControlName="value" placeholder="Valor" [matDatepicker]="myDatepicker-{{rowIndex}}">
                    <mat-datepicker #myDatepicker-{{rowIndex}}></mat-datepicker>
                    <div class="error" *ngIf="vardata.get('value').hasError('required') && vardata.get('value').touched">
                        Obligatorio
                    </div>
                    <button type="button" class="btn" (click)="deleteRow(aggLevelRow, rowIndex)" [disabled]="disableDelete(aggLevelRow, rowIndex)">Borrar</button>
                </div>
            </div>
            <button type="button" class="btn" (click)="addRow(aggLevelRow)" [disabled]="disableAdd()">A&ntilde;adir</button>
        </div>
    </div>
    <button *ngIf="varDataForm.get('aggLevels')?.controls?.length > 0" type="submit" class="btn btn-success" [disabled]="disableSubmit()">Guardar cambios</button>
</form>

我试过用：

<input formControlName="value" placeholder="Valor" [matDatepicker]="myDatepicker-{{rowIndex}}">
<mat-datepicker #myDatepicker-{{rowIndex}}></mat-datepicker>

但是我收到一个错误：

NodeInvocationException: Template parse errors:
Parser Error: Got interpolation ({{}}) where expression was expected at column 13 in [myDatepicker-{{rowIndex}}] in ng:///AppModuleShared/VarDataComponent.html@24:59 ("scription}}</option>
</select>
<input formControlName="value" placeholder="Valor" [ERROR ->][matDatepicker]="myDatepicker-{{rowIndex}}">
<mat-datepicker #myDatepicker-{{rowIndex}}></ma"): ng:///AppModuleShared/VarDataComponent.html@24:59

但我不能用一个以上的输入。

你知道为每个<mat-datepicker #myDatepicker></mat-datepicker>生成<input formControlName="value" placeholder="Valor" [matDatepicker]="myDatepicker">的方法吗？

答案

期望您的代码中没有其他错误，您不需要创建动态模板引用变量，它应该在迭代中正常工作，因此请尝试：

<input formControlName="value" [matDatepicker]="myDatepicker">
<mat-datepicker #myDatepicker></mat-datepicker>

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