我在Angular 4中收到以下错误:
错误TypeError:无法读取未定义的属性“invalid”
这是代码:
<form name="form" #f="ngForm" novalidate>
<tr>
<td width="10%" class="text-blue"></td>
<td><input type="text" name="bankname" maxlength="25" appRestrictinput ="words" [(ngModel)]="model.bk_name" #bk_name="ngModel" class="form-control" autofocus /> </td>
</tr>
<div *ngIf="bankname.invalid && (bankname.dirty || bankname.touched)" class="alert alert-danger">
<div *ngIf="bankname.errors.required">Name is required</div>
</div>
</form>
请让我知道我哪里出错了。提前致谢。
您在视图中的控件参考是bk_name
。用bankname
替换bk_name
。
<div *ngIf="bk_name.invalid && (bk_name.dirty || bk_name.touched)" class="alert alert-danger">
<div *ngIf="bk_name.errors.required">Name is required.</div>