以下是用于收集访问者联系信息的Angular 4组件的代码:
html的:
<form (submit)="onCreateContact()">
<div class="form-group">
<input type="text" [(ngModel)]="contactname" name="contactname" class="form-control form-control-lg" placeholder="Name">
</div>
<div class="form-group">
<input type="email" [(ngModel)]="contactemail" name="contactemail" class="form-control form-control-lg" placeholder="Email">
</div>
<div class="form-group">
<input type="text" [(ngModel)]="contactphone" name="contactphone" class="form-control form-control-lg" placeholder="Phone">
</div>
<input type="submit" class="btn btn-outline-light btn-block" data-toggle="modal" data-target='#addContactModal'>
</form>
<!-- Modal -->
<div class="modal fade" id="addContactModal" tabindex="-1" role="dialog" aria-labelledby="addContactModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="addContactModalLabel">Contact</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
Thanks for contacting us! We will get in touch with you shortly.
</div>
<div class="modal-footer">
<button type="button" class="btn btn-primary" data-dismiss="modal">OK</button>
</div>
</div>
</div>
</div>
.TS:
onCreateContact() {
let contact = {
contactname: this.contactname,
contactemail: this.contactemail,
contactphone: this.contactphone
}
return this.http.post('api/contacts/add', contact).map(res => res.json()).subscribe(data => {
if(data.success) {
console.log(data);
} else {
console.log('Failed to add contact');
}
}
);
}
所有联系人字段均为必填项;如果未填写所有字段,则数据不会传递到后端。 目前,每次按下提交按钮时都会弹出Bootstrap模式,即使数据未通过也是如此。如何仅在数据实际传递到服务器时才显示它?
答案 0 :(得分:1)
当用户点击提交按钮时,您正在切换模式。
您需要做的是,在从后端获得响应后,从组件类(.ts)切换模态。
因此,在“.ts”文件中,在“导入”部分下面添加以下行
declare var $: any;
然后在收到来自后端的响应后切换模态,如下所示
onCreateContact() {
return this.http.post('api/contacts/add', contact).map(res => res.json()).subscribe(data => {
if(data.success) {
console.log(data);
$('#addContactModal').modal('show'); // Add this line
} else {
console.log('Failed to add contact');
$('#errorModalId').modal('show'); // If you are planning to show error modal when something goes wrong.
}
});
}
不要忘记从提交按钮中删除数据切换和数据目标属性。
希望这有帮助。