I used Angularjs $http and $scope to get data from sql server and display it successfully in scopes with no problem. But when I tried to display http json result from separated function in the same scope nothing happened.
All I wanted to know. If I want to get json object in a parameter and select slice from it before displaying, should I make http request every time to do so or can I separate scope away from http request in independent function as shown below.
<%--Angular--%>
<script src="../Scripts/angular.min.js"></script>
<script>
var jsonObj;
var app = angular.module('myApp', []);
app.controller('myCtrl', function ($scope, $http) {
$http.get('../C_Angular.asmx/ShowSlider')
.then(function (response) {
jsonObj = response.data; // this part work well and retrieve data as expected by tracing C_Angular.asmx code
});
Select_From_Json = function (x, y) {
$scope.Categories = jsonObj.slice(x, y); // but this part don't work when I press Button1 to call Select_From_Json
};
});
</script>
When I press Button1 to call Select_From_Json fuction no displaying take place.
<input id="Button1" type="button" value="button" onclick="Select_From_Json(2, 4)" />
<div data-ng-app="myApp" data-ng-controller="myCtrl">
<div data-ng-repeat="Cat in Categories">
<div style="background-image: url('{{Cat.Cat_Pic}}');">
<span>{{Cat.Cat_Name}}</span>
</div>
</div>
</div>
Your button is outside the controllers scope. That is why the Select_From_Json is not executing properly.
Move the button inside the div where the controller is defined.
<div data-ng-app="myApp" data-ng-controller="myCtrl">
<input id="Button1" type="button" value="button" onclick="Select_From_Json(2, 4)" />
<div data-ng-repeat="Cat in Categories">
<div style="background-image: url('{{Cat.Cat_Pic}}');">
<span>{{Cat.Cat_Name}}</span>
</div>
</div>
</div>
You also should be using ng-click for executing functions from a controller like so:
<div data-ng-app="myApp" data-ng-controller="myCtrl">
<input id="Button1" type="button" value="button" ng-click="select_From_Json(2, 4)" />
<div data-ng-repeat="Cat in Categories">
<div style="background-image: url('{{Cat.Cat_Pic}}');">
<span>{{Cat.Cat_Name}}</span>
</div>
</div>
</div>
And in the controller itself:
$scope.select_From_Json = function(x, y){
$scope.Categories = jsonObj.slice(x, y);
}
Related
i have tow div's.
one is add and another one is view. any one div shows at a time. my add button is placed out of the controller.
<input id="Button1" type="button" value="Add" onclick="AddClick()" />
<div ng-app="myApp" ng-controller="csrControl" ng-init="viewdiv=true">
<div id="view" ng-show="viewdiv">
view
</div>
<div id="add" ng-hide="viewdiv">
Add
</div>
</div>
Here i have externally called the controller and assign scope variable to false. the variable set as false, but the div cannot hide and show. ng-show and ng-hide not working
function AddClick() {
var $scope = 'div[ng-controller="csrControl"]';
$scope.viewdiv = 'false';
$scope.$apply();
}
Here are the things I changed to get it working:
Put ng-app="myApp" ng-controller="csrControl" into the body.
Move ng-init="viewdiv=true" to $scope.viewdiv = true;.
and many little things. Check it out.
angular.module('myApp', ['myApp.controllers']);
angular.module('myApp.controllers', []).controller('csrControl', [
'$scope', function($scope){
$scope.viewdiv = true;
$scope.addClick = function() {
$scope.viewdiv = false;
}
}
]);
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
</head>
<body ng-app="myApp" ng-controller="csrControl">
<input id="Button1" type="button" value="Add" ng-click="addClick()" />
<div>
<div id="view" ng-show="viewdiv">
view
</div>
<div id="add" ng-hide="viewdiv">
Add
</div>
</div>
</body>
</html>
I was wondering how to accomplish this with Angular as it seems that ng-click is something to use, then ng-model seems like that could be used.
I want to click on Text and then have a div show its contents and it is not working
My fiddle https://jsfiddle.net/gdxwtoL7/
<div class="well" ng-controller="MyController">
<a class="btn btn-primary" ng-model="selMe" ng-click="handleAnchorClick()">Enter Address</a>
</div>
<br>
<br>
<div ng-if="selMe">
adfadf
</div>
simple module and controller
angular.module('myapp', []);
angular.module('myapp').controller('MyController', MyController)
function MyController($scope) {
}
You're not doing anything inside the ng-click function, and you have the ng-if outside of the controller linked to the variable inside it.
https://jsfiddle.net/gdxwtoL7/1/
HTML
<div class="well" ng-controller="MyController">
<a class="btn btn-primary" ng-click="handleAnchorClick()">Enter Address</a>
<br>
<br>
<div ng-if="selMe">
adfadf
</div>
</div>
JS
angular.module('myapp', []);
angular.module('myapp').controller('MyController', MyController)
function MyController($scope) {
$scope.handleAnchorClick = function () {
$scope.selMe = true
}
}
The controller has to be aware of the div you want it to show.
the ng-if is waiting for the value of the selme which you can alter from the controller.
The ng-model binds your data to your controller in adding two-way data binding.
I made a little enhancement to your code to toggle the div when the text is clicked multiple times.
https://jsfiddle.net/gdxwtoL7/2/
<div class="well" ng-controller="MyController">
<a class="btn btn-primary" ng-model="selMe" ng-click="handleAnchorClick(selMe)">Enter Address</a>
<br>
<br>
<div ng-if="selMe">
adfadf
</div>
</div>
angular.module('myapp', []);
angular.module('myapp').controller('MyController', MyController)
function MyController($scope) {
$scope.handleAnchorClick = function (selMe) {
$scope.selMe = !selMe
}
}
The ngModel directive binds an input,select, textarea (or > custom form control) to a property on the scope using NgModelController, which is created and exposed by this directive.
ngModel is responsible for:
Binding the view into the model, which other directives such as input, textarea or select require.
Providing validation behavior (i.e. required, number, email, url).
Keeping the state of the control (valid/invalid, dirty/pristine, touched/untouched, validation errors).
Setting related css classes on the element (ng-valid, ng-invalid, ng-dirty, ng-pristine, ng-touched, ng-untouched, ng-empty, ng-not-empty) including animations.
Registering the control with its parent form.
The ngClick directive allows you to specify custom behavior when an element is clicked.
Note : we need ng-click to capture the event and manipulate the data stored in ng-model.
Here is simple code without the need of controller:
<div class="well">
<a class="btn btn-primary" href="" ng-click="show=true">Enter Address</a>
</div>
<br>
<br>
<div ng-show="show">
adfadf
</div>
As #MikeHughesIII already pointed out, outside of your controller you can't reach $scope variables.
I am adding a quick snippet made after Mike's answer for completeness sake, showing a show/hide (toggle) approach, where the function sets the visibility variable to the opposite of its current status (true or false) when the function is invoked.
Hope that helps to clarify the issue.
<!DOCTYPE html>
<html>
<head>
<script data-require="angular.js#1.6.2" data-semver="1.6.2" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.2/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
</head>
<body ng-app="myApp">
<div ng-controller="myController">
<h1>Hello {{hello}}!</h1>
<a href ng-click="toggleDivVisibility()">Enter your address</a>
<br>
<textarea ng-if="visible" name="address" id="address" cols="30" rows="5"></textarea>
</div>
<script>
angular.module('myApp', []);
angular.module('myApp')
.controller('myController', myController);
function myController($scope) {
$scope.hello = "world";
$scope.visible = false;
$scope.toggleDivVisibility = function() {
$scope.hello = 'mondo';
$scope.visible = !$scope.visible;
}
}
</script>
</body>
</html>
I'm trying to make a simpliest chat app in Angular 1.
Controller code:
app.controller('mainCtrl', function ($scope, $rootScope, $routeParams, $location, $http) {
$scope.messages=[{'name':'user','text':'test'}];
$scope.submitMessage = function () {
$scope.messages.push({'name':'newuser','text':$scope.mymessage});
}
});
Template:
<div class="page-content" ng-controller="mainCtrl" ng-init="init()">
<div class="messages">
<p class="chat-message" ng-repeat="message in messages"><span class="username">{{message.name}}: </span>{{message.text}}</p>
</div>
<div style="clear:both"></div>
<form ng-submit="submitMessage()" ng-controller="mainCtrl">
<input type="text" ng-model="mymessage" class="message-input" ></input>
</form>
When trying to console.log the $scope.messages array, it shows the new values, but the list itself does not change at all. What can be the reason?
You've got ng-controller="mainCtrl" defined twice, this will actually instantiate 2 different instances of the controller, so the messages you push will be on the array in the second instance of your controller while you're repeating over the messages that are on the first instance of your controller.
You only need it on the surrounding div, everything that is nested inside this tag will be able to access the $scope on your controller.
<div class="page-content" ng-controller="mainCtrl" ng-init="init()">
<div class="messages">
<p class="chat-message" ng-repeat="message in messages"><span class="username">{{message.name}}: </span>{{message.text}}</p>
</div>
<div style="clear:both"></div>
<form ng-submit="submitMessage()">
<input type="text" ng-model="mymessage" class="message-input"/>
</form>
</div>
I am searching how to show a div with AngularJS. I read some topic on StackOverflow but when I try to apply them, it doesn't works for my case...
This is my HTML code :
<div id="myPanel" ng-controller="controllerDependance" ng-show="myvalue" class="ng-cloak">
Blablabla
</div>
<div id="DivWhereIsMyButton" class="clearfix" ng-controller="controllerBubble">
Another div where is my button
<div id="containerButton" ng-controller="controllerDependance">
<button class="btn btn-danger btn-lg pull-right"
ng-click="showAlert()">View dependances
</button>
</div>
</div>
This is the controller :
d3DemoApp.controller('controllerBubble', function () {
});
d3DemoApp.controller('controllerDependance', function ($scope) {
$scope.myvalue = false;
$scope.showAlert = function(){
$scope.myvalue = true;
};
});
I initially thought, it is controllerOther take the hand and cancel the controllerDiv but even if I separate the both, it doesn't works. The problem is I am obligated to put the both in two differents controllers.
I have two controllers, controllerDependance and controllerBubble. My div to show is in the controllerDependance. My button is in a div controllerBubble and I can't move it. So I would like to wrap it in a div controllerDependance.
I make a Plunker to show you the problem : https://plnkr.co/edit/z1ORNRzHbr7EVQfqHn6z?p=preview
Any idea ?
Thanks.
Put the div you want to show and hide inside the controller. It needs to be within the scope of the controller, otherwise your controller function cant see it. Also, consider what you are trying to accomplish with the nested controllers, I often find them unnecessary.
<div id="divButton" class="clearfix" ng-controller="controllerOther">
<div id="buttonToShowDiv" ng-controller="controllerDiv">
<button class="btn btn-danger btn-lg pull-right" ng-click="showAlert()">Show my div</button>
<div id="myDiv"ng-show="myvalue" class="ng-cloak">
Blablabla
</div>
</div>
</div>
I notice in your original example you are declaring ng-controller="controllerDependance" twice in the DOM. I have never tried this before, but I can imagine this will cause problems. From the angular documentation on controllers
When a Controller is attached to the DOM via the ng-controller directive, Angular will instantiate a new Controller object, using the specified Controller's constructor function. A new child scope will be created and made available as an injectable parameter to the Controller's constructor function as $scope
I imagine that this is what is causing you problems. You have to have the div you want to show/hide within the scope of your controller.
I got your plunkr working, you can see my version here: https://plnkr.co/edit/NXbsVFMNHR8twtL8hoE2?p=preview
The problem was stemming from you declaring the same controller twice, and more importantly, the div to show/hide was using ng-show with a value from your mainController. But your div was outside that controller. So ng-show cant see the value. The div has to be withing the scope of the controller
You are using two different controllers which have different $scopes therefore their values are not connected! To show or hide a div is really simple in angular:
<div id="divButton" class="clearfix" ng-controller="myController">
<div id="buttonToShowDiv">
<button class="btn btn-danger btn-lg pull-right" ng-click="showAlert()">Show my div</button>
</div>
<div id="myDiv" ng-show="myvalue" class="ng-cloak">
Blablabla
</div>
</div>
And the script side just almost the same:
d3DemoApp.controller('myController', function AppCtrl ($scope) {
$scope.myvalue = false;
$scope.showAlert = function(){
$scope.myvalue = true;
};
});
Since you question was how to show elements using angular, I took the liberty of using just one controller.
Create a factory that will return an object and let your controllers work with a reference to the same object:
var d3DemoApp = angular.module('app', [])
d3DemoApp.factory('MyValue', function () {
return { value: false };
});
d3DemoApp.controller('controllerBubble', function ($scope, MyValue) {
$scope.myvalue = MyValue;
});
d3DemoApp.controller('controllerDependance', function ($scope, MyValue) {
$scope.myvalue = MyValue;
$scope.showAlert = function(){
$scope.myvalue.value = true;
};
});
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
</head>
<body>
<div ng-app="app">
<div ng-controller="controllerBubble" class="clearfix">
<div id="myPanel" ng-controller="controllerDependance" ng-show="myvalue.value" class="ng-cloak">
Blablabla
</div>
</div>
<div id="DivWhereIsMyButton" class="clearfix" ng-controller="controllerBubble">
Another div where is my button
<div id="containerButton" ng-controller="controllerDependance">
<button class="btn btn-danger btn-lg pull-right" ng-click="showAlert()">View dependances</button>
</div>
</div>
</div>
</body>
</html>
I'm using AngularJS and trying to create a form where I can dynamically add new inputs, similar to this fiddle: http://jsfiddle.net/V4BqE/ (Main HTML below, working code in fiddle).
<div ng-app="myApp" ng-controller="MyCtrl">
<div add-input>
<button>add input</button>
</div>
</div>
I would like to be able to use a HTML template for my form since the input I'm adding is ~300 lines long. My issue is I cannot figure out how to index the scope variable containing the data when used in a template. I've tried to make my own modified version of the above code on plnkr http://plnkr.co/edit/4zeaFoDeX0sGTuBMCQP2?p=info . However, when I click the button no form elements appear.
Online (plnkr) I get a 404 not found for my template.html, but I think that is just a plnkr limitation. On my machine with a Python HttpServer I get an Error: [$parse:syntax] for the $templateRequest and a TypeError: Failed to execute 'appendChild' on 'Node': parameter 1 is not of type 'Node'. when using the $http.get method.
Any advice for getting the indexed scope variable array to work with an external html file?
Thanks, JR
Edit: Update plnkr link
You can do it without directive & external template
what you are trying to do does not require a directive (it actually much simple with the basic angularjs tools)
http://plnkr.co/edit/LVzGN8D2WSL2nR1W7vJB?p=preview
html
<body>
<div class="container" ng-app="myApp" ng-controller="MyCtrl">
<button class="btn btn-primary" type="button" ng-click="addPhoneInput()">add input</button>
<form>
<div ng-repeat="item in telephoneNumbers">
<hr>
<input type="text" ng-model="item.phone">
</div>
</form>
<hr>
<div class="well">
<h4>Phone Numbers,</h4>
<p ng-repeat="item in telephoneNumbers">{{item.phone}}</p>
</div>
</div>
</body>
js
var app = angular.module('myApp', []);
app.controller('MyCtrl', ['$scope', function($scope) {
// Define $scope.telephone as an array
$scope.telephoneNumbers = [];
$scope.addPhoneInput = function() {
$scope.telephoneNumbers.push({});
};
// This is just so you can see the array values changing and working! Check your console as you're typing in the inputs :)
$scope.$watch('telephoneNumbers', function(value) {
console.log(value);
}, true);
}]);
If you insist using a directive,
http://plnkr.co/edit/BGLqqTez2k9lUO0HZ5g1?p=preview
phone-number.template.html
<div>
<hr>
<input type="text" ng-model="ngModel" >
</div>
html
<body>
<div class="container" ng-app="myApp" ng-controller="MyCtrl">
<button class="btn btn-primary" type="button" ng-click="addPhoneInput()">add input</button>
<form>
<phone-number ng-repeat="item in telephoneNumbers" ng-model="item.phone"></phone-number>
</form>
<hr>
<div class="well">
<h4>Phone Numbers,</h4>
<p ng-repeat="item in telephoneNumbers">{{item.phone}}</p>
</div>
</div>
</body>
js
var app = angular.module('myApp', []);
app.controller('MyCtrl', ['$scope', function($scope) {
// Define $scope.telephone as an array
$scope.telephoneNumbers = [];
$scope.addPhoneInput = function() {
$scope.telephoneNumbers.push({});
};
// This is just so you can see the array values changing and working! Check your console as you're typing in the inputs :)
$scope.$watch('telephoneNumbers', function(value) {
console.log(value);
}, true);
}]);
app.directive('phoneNumber', function(){
return {
replace:true,
scope: {
ngModel: '=',
},
templateUrl: "phone-number.template.html"
}
});