当我没有在matdatepicker（angular2）中选择日期时，它将默认值设为＆＃34; 01/01/207＆＃34;，而我需要传递＆＃39; null＆＃ 39;方法。我可以以某种方式更改默认值吗？
我使用的代码如下：
HTML：
<div class="div1">
<form (ngSubmit)="getEventsByDateRange(f)" #f="ngForm" >
<label style="float:left;padding:7px;"> From : </label>
<mat-form-field style="float:left;padding:7px;">
<input type="date" matInput [matDatepicker]="picker1" placeholder="Choose a date" name="fromDate"
[(ngModel)]="eventobj.fromDate" #eventDate="ngModel" required>
<mat-datepicker-toggle matSuffix [for]="picker1"></mat-datepicker-toggle>
<mat-datepicker #picker1></mat-datepicker>
</mat-form-field>
<label style="float:left;padding:7px;"> To : </label>
<mat-form-field style="float:left;padding:7px;">
<input type="date" matInput [matDatepicker]="picker2" placeholder="Choose a date" name="toDate"
[(ngModel)]="eventobj.toDate" #eventDate="ngModel" required>
<mat-datepicker-toggle matSuffix [for]="picker2"></mat-datepicker-toggle>
<mat-datepicker #picker2></mat-datepicker>
</mat-form-field>
<button mat-raised-button class="btn btn-info btn-sm"> Submit </button>
</form>
</div>
TS：
eventobj = {
fromDate: "Date",
toDate: "Date",
}
getJobsByDateRange() {
let fromDate1=new Date(this.eventobj.fromDate)
let toDate1=new Date(this.eventobj.toDate)
alert("from :: "+fromDate1+" to :: "+toDate1)
}
如果我直接点击提交按钮，则会显示警告消息：
from :: Thu Jan 01 1970 05:30:00 GMT + 0530（India Standard Time）to :: Thu Jan 01 1970 05:30:00 GMT + 0530（India Standard Time）
答案 0 :(得分：0)
let fromDate1=new Date(this.eventobj.fromDate)
let toDate1=new Date(this.eventobj.toDate)
在这里，您声明字符串。但你使用日期......
无论如何，这意味着当你做
时Date您实际上将字符串（defaultDate = Date.now();
eventobj = {
fromDate: new Date(this.defaultDate - 1000 * 60 * 60 * 24 * 7), // One week
toDate: new Date(this.defaultDate),
}
getJobsByDateRange() {
let fromDate1 = this.eventobj.fromDate;
let toDate1 = this.eventobj.toDate;
alert("from :: "+fromDate1+" to :: "+toDate1)
}
）转换为实际日期。你很幸运，你有一个约会对象！
用以下内容替换所有内容：
{{1}}