我是angularjs的新手。我正在验证触发保存功能的表格。
我将控件放置在表单中,并将其命名为 myform 。
我在“名称和密码”文本框中使用ng-required="true"
。
在保存按钮的ng-click
中,我调用save()
函数
<div ng-app="myApp" ng-controller="myControl">
<form name="myForm" novalidate>
<table>
<tr>
<td>
Name
</td>
<td>
<input type="text" class="form-control" id="txtName" name="Name" placeholder="Name"
ng-model="Name" ng-required="true">
</td>
</tr>
<tr>
<td>
Password
</td>
<td>
<input type="password" class="form-control" id="txtPassword" placeholder="Password"
ng-required="true" name="Password" ng-model="Password">
</td>
</tr>
<tr>
<td>
Email
</td>
<td>
<input type="email" class="form-control" id="Email" placeholder="Email" name="Email"
ng-model="Email">
</td>
</tr>
<tr>
<td colspan="2" align="right">
<button ng-click="save()"> Save </button>
</td>
</tr>
</table>
</form>
</div>
在save()
函数中,我验证表单并发出警告,说明该表单有效还是无效。
<script type="text/javascript">
var app = angular.module("myApp", []);
app.controller("myControl", function ($scope, $http) {
$scope.save = function () {
if ($scope.myForm.$valid) {
alert('Valid');
} else {
alert('Invalid');
}
};
});
</script>
现在它将触发验证消息
输入名称和密码并提交表单后,页面已加载,但未触发警报消息。
答案 0 :(得分:0)
我将假定它正在尝试调用表单的操作,这没什么,所以它将重新加载页面。您可以使用ng-submit来阻止默认操作。
var app = angular.module("myApp", []);
app.controller("myControl", function($scope, $http) {
$scope.save = function() {
if ($scope.myForm.$valid) {
alert('Valid');
} else {
alert('Invalid');
}
};
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myControl">
<form name="myForm" novalidate ng-submit="save()">
<table>
<tr>
<td>
Name
</td>
<td>
<input type="text" class="form-control" id="txtName" name="Name" placeholder="Name" ng-model="Name" ng-required="true">
</td>
</tr>
<tr>
<td>
Password
</td>
<td>
<input type="password" class="form-control" id="txtPassword" placeholder="Password" ng-required="true" name="Password" ng-model="Password">
</td>
</tr>
<tr>
<td>
Email
</td>
<td>
<input type="email" class="form-control" id="Email" placeholder="Email" name="Email" ng-model="Email">
</td>
</tr>
<tr>
<td colspan="2" align="right">
<button type="submit"> Save </button>
</td>
</tr>
</table>
</form>
</div>
或者,如果您真的想保留ng-click
,则可以在save方法中传递事件,并在该方法中阻止它
var app = angular.module("myApp", []);
app.controller("myControl", function($scope, $http) {
$scope.save = function(e) {
e.preventDefault()
if ($scope.myForm.$valid) {
alert('Valid');
} else {
alert('Invalid');
}
};
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myControl">
<form name="myForm" novalidate>
<table>
<tr>
<td>
Name
</td>
<td>
<input type="text" class="form-control" id="txtName" name="Name" placeholder="Name" ng-model="Name" ng-required="true">
</td>
</tr>
<tr>
<td>
Password
</td>
<td>
<input type="password" class="form-control" id="txtPassword" placeholder="Password" ng-required="true" name="Password" ng-model="Password">
</td>
</tr>
<tr>
<td>
Email
</td>
<td>
<input type="email" class="form-control" id="Email" placeholder="Email" name="Email" ng-model="Email">
</td>
</tr>
<tr>
<td colspan="2" align="right">
<button type="submit" ng-click="save($event)"> Save </button>
</td>
</tr>
</table>
</form>
</div>
答案 1 :(得分:0)
这是您应该做的
<form ng-submit="myForm.$valid && save()" name="myForm">
<button type="submit">Submit</button>
</form>
如果表单无效,此简单代码段ng-submit="myForm.$valid && save()"
将不会调用save
。这是有角度的方法-将所有验证与业务逻辑分开。 save
方法仅在所有表单数据均有效时才应执行。
有很多基本输入验证指令:minlength, maxlength, required, pattern and etc.
。 AngularJS有一个很棒的机制,允许您创建自己的验证(Here是一篇很棒的文章,介绍了如何为输入实现自定义验证,以防万一)。