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My drop down list not selected dynamically

I have to select drop down list value dynamically for update functionality in my web site. I also go through similar tutorials and stack overflow question-answer.
I work with angularjs v1.4.2, up till now I tried below code.
HTML:
<label for="ddlDesignationDepartment"> Department</label>
<select name="ddlDesignationDepartment" ng-model="designation.DepartmentId"
ng-options="dept.DepartmentId as dept.DepartmentName for dept in departmentList track by dept.DepartmentId" >
</select>
<br/>
<label for="txtDesignationName"> Designation</label>
<input type="text" name="txtDesignationName"
ng-model="designation.DesignationName"
placeholder="Designation name"/>
<br/>
<label for="txtDescription"> Description</label>
<input type="text" name="txtDescription"
ng-model="designation.Description"
placeholder="Desription"/>
<input type="button" value="{{designation.DesignationId>0?'Update':'Insert'}}"
ng-click="ManageDesignation(designation)" />
<table name="tblDesignationResult">
<tbody ng-if="designationList.length>0">
<tr ng-repeat="des in designationList">
<td>
{{$index+1}}
</td>
<td >
{{des.DesignationName}}
</td>
<td>
{{des.Description}}
</td>
<td >
{{des.DepartmentName}}
</td>
<td>
<input type="button" value="Edit" ng-click="EditDesgnation(des)" />
</td>
</tr>
</tbody>
</table>
AngularJs code:
(function () {
'use strict';
///Decalre angular controllar for Designation
angular.module('AngularDemo').controller('DesignationCtrl', ['$scope', '$rootScope', 'DesignationService', 'DepartmentService', DesignationCtrl]);
///Designation controllar
function DesignationCtrl($scope, $rootScope, DesignationService,
DepartmentService) {
///Get or set all Designation
$scope.designationList = [];
///Get or set all Department
$scope.departmentList = [];
///Get or set Designation
$scope.designation = new Designation();
///Retrive all Designation by DesignationService
$scope.GetAllDesignations = function () {
DesignationService.GetAllDesignations().then(function (response) {
if (response && response.data) {
/// Success block
if (response.data.Result) {
$scope.designationList = angular.copy(response.data.Result);
}
else {
alert(response.data.Message);
}
}
});
}
/// Manage Insert / Update / Delete on specific Designation by
///DesignationService
$scope.ManageDesignation = function ( des) {
DesignationService.ManageDesignation(des).then(function (response) {
if (response && response.data) {
/// Success block
if (response.data.Result) {
$scope.departmentList = angular.copy(response.data.Result);
}
else {
alert(response.data.Message);
}
}
});
$scope.Init();
}
///Retrive all Department by DepartmentService
$scope.GetAllDepartments = function () {
DepartmentService.GetAllDepartments().then(function (response) {
if (response && response.data) {
/// Success block
if (response.data.Result) {
$scope.departmentList = angular.copy(response.data.Result);
}
else {
alert(response.data.Message);
}
}
});
}
///Edit Designation
$scope.EditDesgnation = function (des) {
$scope.designation = des;
}
///Inilise Designation controllar
$scope.Init = function () {
$scope.designation = new Designation();
$scope.GetAllDesignations();
$scope.GetAllDepartments();
}
}
})();
///JavaScript Class of Designation
function Designation() {
this.DesignationId = 0;
this.DesignationName='';
this.Description = '';
this.DepartmentId = 0;
}
Designation.prototype = {
constructor: Designation
}
Sample Database
Department{DepartmentId int, DepartmentName varchar(max)}
Designation{DesignationId int,DesignationName varchar(max),Description varchar(max),DepartmentId int}
All services working fine, initially everything is fine all data are display in Result table, Dropdown list was also show all departments. But the problem is when I click on edit for update any record textbox value are filled for specific data but the Department Dropdown list value are not select.

Be careful when using select as and track by in the same expression.
Given this array of items on the $scope:
$scope.items = [{
id: 1,
label: 'aLabel',
subItem: { name: 'aSubItem' }
}, {
id: 2,
label: 'bLabel',
subItem: { name: 'bSubItem' }
}];
This will work:
<select ng-options="item as item.label for item in items track by item.id" ng-model="selected"></select>
$scope.selected = $scope.items[0];
but this will not work:
<select ng-options="item.subItem as item.label for item in items track by item.id" ng-model="selected"></select>
$scope.selected = $scope.items[0].subItem;
In both examples, the track by expression is applied successfully to each item in the items array. Because the selected option has been set programmatically in the controller, the track by expression is also applied to the ngModel value. In the first example, the ngModel value is items[0] and the track by expression evaluates to items[0].id with no issue. In the second example, the ngModel value is items[0].subItem and the track by expression evaluates to items[0].subItem.id (which is undefined). As a result, the model value is not matched against any and the appears as having no selected value
so in your case as well change this
ng-options="dept.DepartmentId as dept.DepartmentName for dept in departmentList track by dept.DepartmentId
to
ng-options="dept as dept.DepartmentName for dept in departmentList track by dept.DepartmentId
since dept[0].DepartmentId.id do not exists

Enable/Disable button in AngularJS

I have a table that has a checkbox. It has a select ALL javascript function and a select one by one function. My html file looks like this for the delete button:
<button data-toggle="modal" data-target="#rejectModal" contenteditable="false" id="delbutton" ng-model="delbutton" ng-disabled="countChecked() == 0">Delete</span></button>
Select All Checkbox:
<th class="">
<input type="checkbox" name="select" id="checkAll" ng-model="selectAllRawSCP"/>
</th>
table details:
<tr ng-repeat=" item in rawSCAP | orderBy:sort">
<td>
<input type="checkbox" name="select" value="checked" ng-model="item.checked"/>
</td>
I used the code I saw in one of the answers here in stack overflow to disable the delete button if there is no checkbox checked. It looks like this:
$scope.countChecked = function(){
var count = 0;
angular.forEach($scope.rawSCAP, function(value){
if (value.checked) count++;
});
return count;
}
But using this, my page returns an error which isTypeError: Cannot read property 'checked' of null
And also I need to enable delete button even if I used select all

The error is pretty clear, it cannot access the property checked of the rawSCAP itens. You have to guarantee rawSCAP itens checked property is not null before you try to use it in ng-model.
You could try to initialize it before with some value you want. Check this on how to do it.

There are some conditions you need to follow to use the <<ng-model>>.checked, which is a plain array can't be used for checkbox, it must be an array of objects. Also please change your function to below.
$scope.countChecked = function() {
var count = 0;
angular.forEach($scope.rawSCAP, function(value) {
value.checked = value.checked || 0;
if (value.checked) count++;
});
return count;
}
The main line which does the work is value.checked = value.checked || 0; Here if the value.checked is undefined, then the 0 will get assigned to value.checked, hence you won't get the error!
var app = angular.module('myApp', []);
app.controller('MyController', function MyController($scope) {
$scope.rawSCAP = [{
item: 1
}, {
item: 2
}, {
item: 3
}, {
item: 4
}, {
item: 5
}, {
item: 6
}, {
item: 7
}];
$scope.countChecked = function() {
var count = 0;
angular.forEach($scope.rawSCAP, function(value) {
value.checked = value.checked || 0;
if (value.checked) count++;
});
return count;
}
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-controller='MyController' ng-app="myApp">
<button data-toggle="modal" data-target="#rejectModal" contenteditable="false" id="delbutton" ng-model="delbutton" ng-disabled="countChecked() == 0">Delete</button>
<table>
<th class="">
<input type="checkbox" name="select" id="checkAll" ng-model="selectAllRawSCP" />
</th>
<tr ng-repeat=" item in rawSCAP | orderBy:sort">
<td>
<input type="checkbox" name="select" value="checked" ng-model="item.checked" />{{item.item}}
</td>
</tr>
</table>
</div>

How to get table row data using check box in Angular.js

I need one help.I need to get all checked data from the table row using Angular.js. I am explaining my code below.
<tr ng-repeat="gl in galleryDatas">
<td><input type="checkbox" name=""> {{$index+1}}</td>
<td><img ng-src="upload/{{gl.image}}" border="0" name="image" style="width:100px; height:100px;" /></td>
<td>{{gl.description}}</td>
</tr>
Here i need while user will clicked the check box the respective row data will retrieving into a array.Please help me.

Use ng-change on the checkbox
<td><input type="checkbox" ng-change="clickedRow(gl.checked)" name="" ng-model="gl.checked"></td>
In controller,
$scope.clickedRow = function(checked) {
if (checked) {
//add to the list
} else {
// remove from list
}
}

you can achieve by this process
in your controller:
$scope.galleryDatas = [
{
name: 'something',
description: "name 1"
},
{
name: 'another',
description: "name 2"
}
];
$scope.checkedValue = [];
$scope.saveInArray = function(index) {
if($scope.galleryDatas[index].checked) {
$scope.checkedValue.push($scope.galleryDatas[index]);
} else {
var newIndex = $scope.checkedValue.map(function(e) { return e.name; }).indexOf($scope.galleryDatas[index].name);
// for compare instead of "name" you should use that field is unique. ie: e.uniqueField
// and $scope.galleryDatas[index].uniqueField
if(newIndex !== -1)
$scope.checkedValue.splice(newIndex,1);
}
};
N.B: where checked row data store in $scope.checkedValue array and when unchecked then removed from $scope.checkedValue array
and Html:
<td><input type="checkbox" ng-model="gl.checked" ng-click="saveInArray($index)"> {{$index+1}}</td>

Unable to do mathematical calculations in angularJS

What I am trying to achieve is like this. There will be two columns one holds current quantity of products I have in my hand, next one is a pack-up column it will have a textbox with default 0 value, when I change value inside that textbox and press submit button I want that value to be subtracted from my first column(quantity) (which is done).subsequent to this i want to add up the value in textbox together in last column and go on, so that i can see how much items so far packed
So far I have made something like this
<div ng-app='myApp' ng-controller="MainCtrl">
<div ng-repeat="prdElement in packageElement track by $index" class="package-grid">
<table class="hovertable">
<thead>
<tr>
<th>Line #</th>
<th>Quantity in Plt</th>
<th>Allready Packed</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="data in prdElement.Data" ng-init="data.newquantity = 0">
<td>{{data.itemId}}</td>
<td>
<input type="text" ng-model="data.newquantity" placeholder="Quantity" required=required />
</td>
<td>{{data.packed}}</td>
</tr>
<tr>
<td width="100%" colspan="4">
<button ng-show="prdElement.show" ng-click="newPackageItem( prdElement,$event)">Next Pallet</button>
</td>
</tr>
</tbody>
</table>
</div>
(function () {
angular.module('myApp', []).controller('MainCtrl', function ($scope) {
var counter = 0;
$scope.packageElement = [{
name: counter,
show: true,
Data: [{
name: 'item 1',
itemId: '284307',
quantity: '100',
packed: 0
}, {
name: 'item 2',
itemId: '284308',
quantity: '200',
packed: 0
}]
}];
$scope.newPackageItem = function (packageElement, $event) {
var npackageElement = {};
angular.copy(packageElement, npackageElement);
counter++;
packageElement.show = false;
npackageElement.name = counter;
angular.forEach(npackageElement.Data, function (row) {
if (row.quantity != row.newquantity || row.quantity != 0) {
row.quantity = row.quantity - row.newquantity;
row.packed = row.newquantity;
}
});
npackageElement.show = true;
angular.forEach(packageElement.Data, function (row) {
row.packed = row.packed + row.newquantity;
});
$scope.packageElement.push(npackageElement);
};
});
}());
All done except when Quantity in Pltis added and pressed button i want that quantity to shown on last column (already packed) and follow up on subsequent rows. I have made an attempt as you can see here
row.packed = row.packed + row.newquantity;
but addition does not works correctly, rather values concatenates.
Fiddle

Try
row.packed = Number(row.packed) + Number(row.newquantity);
Here is the fiddle

Try
row.packed = parseInt(row.packed, 10) + parseInt(row.newquantity, 10);

ng-enter directive and select attribute confilicted with each other

Consider this code:
<typeahead class="typeahead"
search="searchPersonage(term)"
select="selectPersonage(item)"
ng-model="typeaheadModel"
ng-enter='selectCustomer(typeaheadModel)'>
<table class="table">
<thead>
<tr>
<th></th>
<th></th>
</tr>
</thead>
<tbody>
<tr typeahead-item="customerPhone"
ng-repeat="customerPhone in customerPhones">
<td>{{customerPhone.Title}}</td>
<td>{{customerPhone.Value}}</td>
</tr>
</tbody>
</table>
</typeahead>
as you can see I have a typeahead tag and in this tag i have ng-enter directive and select attribute. What I need is when an unkown phone number is entered by user and if that number is not in typeahead objects and then user hits the enter button, I want it to be pushed in an array. But I want only that unknown number to be pushed.
However, now when user hits the enter button, not only the number is pushed in the array but also the select method is called. This causes the unknown number to be pushed into the target array, alongside an object from typeahead data source.
$scope.selectCustomer = function (item) {
$scope.selectedPhones.push({
Value: item.Value,
Title: item.Title
});
};
$scope.selectPhone = function (item) {
for (var i = 0; i < $scope.customerPhones.length; i++) {
if (item == $scope.customerPhones[i].Title
|| item == $scope.customerPhones[i].Value) {
$scope.selectedPhones.push({
Value: $scope.customerPhones[i].Value,
Title: $scope.customerPhones[i].Title
});
$scope.customerPhones = [];
flag = false;
}
}
if (flag) {
if (item.match("^09[0-3][0-9]{8}$")) {
$scope.selectedPhones.push({
Value: item,
Title: 'Unknown'
});
$scope.customerPhones = [];
}
else {
toaster.showError('This number is not valid : ' + item);
$scope.customerPhones = [];
}
}
$scope.typeaheadModel = "";
flag = true;
}