Typeerror: cannot read properties of undefined

Question

1.00/5 (1 vote)

See more:

I often get this error when i run my application below

JavaScript

"<pre>angular.js:13236 TypeError: Cannot read properties of undefined (reading 'substr')
    at ConvertJsonDateToDateTime (Index:70)
    at Index:60
    at angular.js:10973
    at angular.js:15552
    at m.$eval (angular.js:16820)
    at m.$digest (angular.js:16636)
    at m.$apply (angular.js:16928)
    at g (angular.js:11266)
    at t (angular.js:11464)
    at XMLHttpRequest.u.onload (angular.js:11405)

What I have tried:

// Controller.cs

using TimeApplication.Models;

namespace TimeApplication.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            return View();
        }

        public JsonResult GetAll()
        {
            return Json(DashboardTimeLine(), JsonRequestBehavior.AllowGet);
        }

        public List<Dashboard> DashboardTimeLine()
        {
            List<Dashboard> TimeList = new List<Dashboard>();
            TimeList.Add(new Dashboard { Incident = 1, dateTime = new DateTime(2021, 09, 13) });
            return TimeList;
        }
    }

// Model.cs

public class Dashboard
   {

       // Map all values from the record list in TimeLine Application DB.

       [Key]
       [Display(Name = "Incident")]
       public int Incident { get; set; }

       [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:yyyy-MM-dd HH:mm}")]
       public DateTime dateTime { get; set; }

       [Display(Name = "Resource")]
       public string Resources { get; set; }

       [Display(Name = "Description")]
       public string Description { get; set; }

       [Display(Name = "EndDate")]
       public int EndDate { get; set; }

}

// index.cshtml

<body>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css" />
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.0/angular.min.js"></script>
    <script type="text/javascript">
        var app = angular.module('TimeApplication', [])
        app.controller('Home', function ($scope, $http) {
            GetDashboardTimeLine();
            function GetDashboardTimeLine() {
                $scope.TimeList = [];
                $http({
                    method: 'Get',
                    url: '/Home/DashboardTimeLine'
                }).success(function (data, status, headers, config) {
                    for (var i = 0; i < data.length; i++) {
                        var dateTime = data[i].FromDate;

                        data[i].dateTime = new Date(ConvertJsonDateToDateTime(dateTime));

                    }
                    $scope.TimeList = data;
                }).error(function (data, status, headers, config) {
                    $scope.message = 'Unexpected Error';
                });
            }

            function ConvertJsonDateToDateTime(date) {
                var parsedDate = new Date(parseInt(date.substr(6)));
                var tzoffset = (new Date(parsedDate)).getTimezoneOffset() * 60000;
                var localISOTime = (new Date(parsedDate - tzoffset)).toISOString().substring(0, 19).replace('T', ' ').replace(/-/g, '/');
                return localISOTime;
            }

            $scope.TimeDiff = function (start, end) {
                var diff = (end.getTime() - start.getTime()) / 1000;
                diff /= 60 * 60;
                return Math.abs(Math.round(diff));
            }
        });
    </script>
    <div ng-app="TimeApplication" ng-controller="Home" align="center">
        <table class="table table-bordered table-hover table-striped">
            <tr>
                <th>Incident</th>
                <th>dateTime</th>
                <th>Duration</th>
            </tr>
            <tbody ng-repeat="e in TimeList">
                <tr>
                    <td>{{e.Incident}}</td>
                    <td>{{e.dateTime | date : "yyyy/MM/dd"}}</td>
                    <td>{{e.dateTime | date : "HH:mm:ss"}}</td>
                    <td>{{TimeDiff(e.dateTime,e.EndDate)}} Hours</td>
                </tr>
            </tbody>
        </table>
    </div>
</body>

Posted 22-Sep-21 19:00pm

Tgcobza Mkontwana

Add a Solution

Comments

Richard Deeming 23-Sep-21 3:39am

Use your browser's developer tools to inspect the response to the AJAX request to see why the returned data doesn't contain a property called "FromDate".

We can't run your code, so we can't debug it for you.

Tgcobza Mkontwana 23-Sep-21 4:21am

@Richard Deeming, i did and its working now. Doing other add features to it.

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)