Javascript 从视图中的动态文本框向AngularJS控制器发送数据

我有一个下拉列表，当用户从下拉列表中选择任何选项时，每个选项都会显示一个文本框。 HTML-

但这使得数据的值未定义。

---

那么还能做些什么呢？

使用AngularJS的数据驱动方法，从jQuery方法转移到问题上。您可以遵循下面的解决方案

让我们先看看你的问题

您有一个要显示的标签/标记列表

用户输入的文本必须与用户在选择选项中选择的标签/标签相关联

如果未选择“选择”菜单中的任何选项，则不会显示文本输入字段

一旦用户选择标签并输入相应的标签，然后按Submit。您希望将数据保存到后端/数据库

让我们为此创建一个干净的解决方案

我们将首先为此设计控制器，并设置所需的变量和模型

angular.controller('testController',['$scope','$http','$location',function($scope,$http,$location){

  $scope.optionsList = ['N1','N2','N3','N4','N5']; //List of options to be displayed in select
  $scope.selectedOption = 'Select Tags'; //Variable to store the selected option      
  $scope.textFilled = ''; //this model will store the text entered by the user
  $scope.showTextField = false;// this model will decide when to show the text-field

  $scope.switchTextFieldStates = function(){
      if($scope.selectOptions != 'Select Tags'){
        $scope.showTextFields = true;
      }else {
        $scope.showTextFields = false;
      }
      $scope.textFilled = ''; //This will ensure that if user changes the option then previously filled data is cleared out of the model
  }

  $scope.saveData = function(){

      console.log($scope.selectedOption,$scope.textFilled);
//Do whatever you want to do here with the data you got
 //Reset the state of the view 
      $scope.showTextFields = false;
      $scope.textFillled = '';
      $scope.selectedOptions = 'Select Tags';
 }

}];

让我们为这个问题创建一个合适的HTML模板

<select ng-options="item as item in optionsList" ng-model="selectedOption" ng-change="switchTextFieldStates()"></select>

<div id="holder" ng-show="showTextFields"><input type="text" ng-model="textFilled"/></div>
<input type="submit" ng-click="saveData()"/>

---

使用AngularJS的数据驱动方法，从jQuery方法转移到问题上。您可以遵循下面的解决方案

让我们先看看你的问题

您有一个要显示的标签/标记列表

用户输入的文本必须与用户在选择选项中选择的标签/标签相关联

如果未选择“选择”菜单中的任何选项，则不会显示文本输入字段

一旦用户选择标签并输入相应的标签，然后按Submit。您希望将数据保存到后端/数据库

让我们为此创建一个干净的解决方案

我们将首先为此设计控制器，并设置所需的变量和模型

angular.controller('testController',['$scope','$http','$location',function($scope,$http,$location){

  $scope.optionsList = ['N1','N2','N3','N4','N5']; //List of options to be displayed in select
  $scope.selectedOption = 'Select Tags'; //Variable to store the selected option      
  $scope.textFilled = ''; //this model will store the text entered by the user
  $scope.showTextField = false;// this model will decide when to show the text-field

  $scope.switchTextFieldStates = function(){
      if($scope.selectOptions != 'Select Tags'){
        $scope.showTextFields = true;
      }else {
        $scope.showTextFields = false;
      }
      $scope.textFilled = ''; //This will ensure that if user changes the option then previously filled data is cleared out of the model
  }

  $scope.saveData = function(){

      console.log($scope.selectedOption,$scope.textFilled);
//Do whatever you want to do here with the data you got
 //Reset the state of the view 
      $scope.showTextFields = false;
      $scope.textFillled = '';
      $scope.selectedOptions = 'Select Tags';
 }

}];

让我们为这个问题创建一个合适的HTML模板

<select ng-options="item as item in optionsList" ng-model="selectedOption" ng-change="switchTextFieldStates()"></select>

<div id="holder" ng-show="showTextFields"><input type="text" ng-model="textFilled"/></div>
<input type="submit" ng-click="saveData()"/>

当您的页面完成加载时，链接阶段就结束了，因此我认为您使用JQuery动态创建的输入无法与Angular绑定。您可以实现您的需求，但这根本不是直线和角度的推荐方式。链接阶段在您的页面完成加载时完成，因此我认为您使用JQuery动态创建的输入无法与角度绑定。您可以实现您的需求，但它不会是直线和角度的推荐方式。谢谢！这很有效。但这会一个接一个地保存数据。如果我想同时保存多个文本字段中的值，该怎么办？谢谢！这很有效。但这会一个接一个地保存数据。如果要同时保存多个文本字段中的值，该怎么办？

angular.controller('testController',['$scope','$http','$location',function($scope,$http,$location){

  $scope.optionsList = ['N1','N2','N3','N4','N5']; //List of options to be displayed in select
  $scope.selectedOption = 'Select Tags'; //Variable to store the selected option      
  $scope.textFilled = ''; //this model will store the text entered by the user
  $scope.showTextField = false;// this model will decide when to show the text-field

  $scope.switchTextFieldStates = function(){
      if($scope.selectOptions != 'Select Tags'){
        $scope.showTextFields = true;
      }else {
        $scope.showTextFields = false;
      }
      $scope.textFilled = ''; //This will ensure that if user changes the option then previously filled data is cleared out of the model
  }

  $scope.saveData = function(){

      console.log($scope.selectedOption,$scope.textFilled);
//Do whatever you want to do here with the data you got
 //Reset the state of the view 
      $scope.showTextFields = false;
      $scope.textFillled = '';
      $scope.selectedOptions = 'Select Tags';
 }

}];

<select ng-options="item as item in optionsList" ng-model="selectedOption" ng-change="switchTextFieldStates()"></select>

<div id="holder" ng-show="showTextFields"><input type="text" ng-model="textFilled"/></div>
<input type="submit" ng-click="saveData()"/>