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[英]How to validate form elements for white space before sending it using AJAX?
[英]Validate form using angularjs before ajax request
我有一个像这样的简单表格。 我正在使用 angularjs 通过 ajax 提交此表单。 我想在发送 ajax 请求之前验证此表单并需要向用户显示错误。 我是角度的新手。 请帮我
这是我的代码。
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-route.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-messages.js"></script>
<div ng-app="Myapp">
<div ng-controller="orderFormController">
Item : <input type="text" name="item" ng-model='item' required> <p></p>
Rate: <input type="text" name="rate" ng-model='rate' required> <p></p>
<button type="button" ng-click='saveorder()' >SAVE ORDER</button>
</div>
<script>
var Myapp = angular.module('Myapp', ["ngRoute"]);
Myapp.controller('orderFormController', ['$scope', '$http', function ($scope, $http) {
$scope.saveorder = function () {
// Validate form here and set the error in form
$http.post("order/save/", data).success(function (res, status, headers, config) {
$scope.message = res;
}).error(function (data, status) {
$scope.message = res;
});
}
}]);
</script>
非常简单的实现可以通过几个步骤完成:
name
属性的<form>
标签。 在ng-submit
属性中使用saveorder
。<span class="error" ng-show="form.item.$error.required
">最终结果应如下所示:
<div ng-controller="orderFormController">
<form name="form" ng-submit="saveorder()">
Item : <input type="text" name="item" ng-model='item' required> <p></p>
<span class="error" ng-show="form.item.$error.required"> Item field is required!</span>
Rate: <input type="text" name="rate" ng-model='rate' required> <p></p>
<span class="error" ng-show="form.rate.$error.required"> Rate field is required!</span>
<button type="button">SAVE ORDER</button>
</form>
</div>
您可以阅读有关表单验证的Angular 原生文档。 那里提供了更多详细信息。
阅读这篇文章.. https://scotch.io/tutorials/angularjs-form-validation
它很好地解释了它,如果仍然存在混淆,请在努力之后询问那些问题。
您应该为此或自定义验证使用角度表单验证
var Myapp = angular.module('Myapp', ["ngRoute"]); Myapp.controller('orderFormController', ['$scope', '$http', function($scope, $http) { $scope.formdata = {}; $scope.saveorder = function(formdata) { $scope.error = ''; // Validate form here and set the error in form if (angular.isUndefined(formdata.item) == true || angular.isUndefined(formdata.rate) == true) { $scope.error = "Both Item and Rate are required." return false; } else { $scope.error = ''; } $http.post("order/save/", formdata).success(function(res, status, headers, config) { $scope.message = res; }).error(function(status, res) { $scope.message = res; }); } }]);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-route.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-messages.js"></script> <div ng-app="Myapp"> <div ng-controller="orderFormController"> <span style="color:red">{{error}}</span><br> Item : <input type="text" name="item" ng-model='formdata.item' required> <p></p> Rate: <input type="text" name="rate" ng-model='formdata.rate' required> <p></p> <button type="button" ng-click='saveorder(formdata)' >SAVE ORDER</button> </div>
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