AngularJS表单详解及示例代码

2019-11-20 09:13:31

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来源：转载

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AngularJS提供丰富填写表单和验证。我们可以用ng-click来处理AngularJS点击按钮事件，然后使用 $dirty 和 $invalid标志做验证的方式。使用novalidate表单声明禁止任何浏览器特定的验证。表单控件使用了大量的角活动。让我们快速浏览一下有关事件先。

事件

AngularJS提供可与HTML控件相关联的多个事件。例如ng-click通常与按钮相关联。以下是AngularJS支持的事件。

ng-click

ng-dbl-click

ng-mousedown

ng-mouseup

ng-mouseenter

ng-mouseleave

ng-mousemove

ng-mouseover

ng-keydown

ng-keyup

ng-keypress

ng-change

ng-click

使用点击一个按钮的指令，表单重置数据。

<input name="firstname" type="text" ng-model="firstName" required><input name="lastname" type="text" ng-model="lastName" required><input name="email" type="email" ng-model="email" required><button ng-click="reset()">Reset</button><script>  function studentController($scope) {    $scope.reset = function(){     $scope.firstName = "Mahesh";     $scope.lastName = "Parashar";     $scope.email = "MaheshParashar@yiibai.com"; }    $scope.reset();}</script>

验证数据

可使用下面跟踪误差。

$dirty - 规定值已被改变。

$invalid- 该值的状态是无效的。

$error- 指出确切的错误。

例子

下面的例子将展示上述所有指令。

testAngularJS.html

<html><head><title>Angular JS Forms</title><style>table, th , td { border: 1px solid grey; border-collapse: collapse; padding: 5px;}table tr:nth-child(odd) { background-color: #f2f2f2;}table tr:nth-child(even) { background-color: #ffffff;}</style></head><body><h2>AngularJS Sample Application</h2><div ng-app="" ng-controller="studentController"><form name="studentForm" novalidate><table border="0"><tr><td>Enter first name:</td><td><input name="firstname" type="text" ng-model="firstName" required>  <span style="color:red" ng-show="studentForm.firstname.$dirty && studentForm.firstname.$invalid">   <span ng-show="studentForm.firstname.$error.required">First Name is required.</span>  </span></td></tr><tr><td>Enter last name: </td><td><input name="lastname" type="text" ng-model="lastName" required>  <span style="color:red" ng-show="studentForm.lastname.$dirty && studentForm.lastname.$invalid">   <span ng-show="studentForm.lastname.$error.required">Last Name is required.</span>  </span></td></tr><tr><td>Email: </td><td><input name="email" type="email" ng-model="email" length="100" required><span style="color:red" ng-show="studentForm.email.$dirty && studentForm.email.$invalid">   <span ng-show="studentForm.email.$error.required">Email is required.</span>	 <span ng-show="studentForm.email.$error.email">Invalid email address.</span>  </span></td></tr><tr><td><button ng-click="reset()">Reset</button></td><td><button 	ng-disabled="studentForm.firstname.$dirty && studentForm.firstname.$invalid ||			 studentForm.lastname.$dirty && studentForm.lastname.$invalid ||			 studentForm.email.$dirty && studentForm.email.$invalid"	ng-click="submit()">Submit</button></td></tr></table></form></div><script>function studentController($scope) {   $scope.reset = function(){		$scope.firstName = "Mahesh";		$scope.lastName = "Parashar";		$scope.email = "MaheshParashar@yiibai.com";  }    $scope.reset();}</script><script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script></body></html>

输出

在Web浏览器打开textAngularJS.html。看到结果如下。