文库-火龙果软件 - 关心工作者的实践

AngularJS表单

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。

<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.htm。看到结果如下

捐助