小编use*_*570的帖子

通过子组件的多个指令传递对象时,我收到以下错误消息:

检查后表情发生了变化.上一个值:'true'.当前值:'false'.

模板:

<form *ngIf="deliveryrequest" [formGroup]="deliveryRequestForm" (ngSubmit)="onSubmit(deliveryRequestForm)">
    <h4>Detail: {{deliveryrequest.nr}}</h4>
    <div class="row">
        <div class="col-lg-6 col-xs-12 col-md-6 col-sm-6">
            <drr-request [request]="deliveryrequest" [group]="deliveryRequestForm"></drr-request>
            <drr-received [received]="deliveryrequest" [group]="deliveryRequestForm"></drr-received>
        </div>
        <div class="col-lg-6 col-xs-12 col-md-6 col-sm-6">
            <drr-requester [requester]="deliveryrequest" [group]="deliveryRequestForm"></drr-requester>
        </div>
    </div>

    <div class="row">
        <div class="col-lg-12 col-xs-12">
            <button type="submit" class="btn btn-primary" [disabled]="!deliveryRequestForm.valid">Bewaren</button>
        </div>
    </div>
</form>

请求者组件模板:

<div [formGroup]="requesterForm">
    <div class="row">
        <div class="col-lg-12 col-xs-12 col-md-12 col-sm-12">
            <div class="panel panel-default">
                <div class="panel-heading">Aanvrager</div>
                <div class="control-group">
                    <drr-person [required]="true" (isMinorEmittor)="setPersonIsMinor($event)" [group]="requesterForm"></drr-person>
                </div>
            </div>
        </div>
    </div>
    <div class="row" formArrayName="responsiblePersonsNationalNumbers">
        <div class="col-lg-6 col-xs-12 col-md-6 col-sm-6"
             *ngFor="let …

Startup.cs

services.AddMvc().AddJsonOptions(options => {
                options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
            });

随机课

JsonConvert.SerializeObject(configItem)

未应用SerializerSettings - >不会忽略null值.