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DataTable - Appending Additional column is throwing some Exception Error

I'm trying to implement Server Side DataTable.
Everything goes perfectly fine up to the last rowCallback where I'm appending button to additional column for Actions (i.e. Edit/Delete).
Issue:
Here's my code.
<link href="~/Content/datatables.min.css" rel="stylesheet" /> //<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/v/dt/dt-1.10.16/datatables.min.css"/>
<link href="~/Content/font-awesome.min.css" rel="stylesheet" />
<div class="container">
<div class="row" style="margin-top:25px">
<table class="table table-bordered table-responsive dataTables-list">
<thead>
<tr>
<th>
Id
</th>
<th>
Name
</th>
<th>
Actions
</th>
</tr>
</thead>
<tbody>
#foreach (var item in Model)
{
<tr>
<td>
#Html.DisplayFor(modelItem => item.Id)
</td>
<td>
#Html.DisplayFor(modelItem => item.Name)
</td>
<td>
<i class="fa fa-pencil"></i>
</td>
</tr>
}
</tbody>
</table>
</div>
</div>
JavaScript:
<script src="~/Scripts/datatables.min.js"></script> //<script type="text/javascript" src="https://cdn.datatables.net/v/dt/dt-1.10.16/datatables.min.js"></script>
<script>
$(document).ready(function () {
$('.dataTables-list').DataTable({
/*Sorting*/
"bSort": true,
"aoColumnDefs": [{
'bSortable': true
}],
"processing": true, // for show progress bar
"serverSide": true, // for process server side
"ajax": {
"url": "/Home/LoadData",
"type": "POST",
"datatype": "json"
},
"aoColumns": [{
"mDataProp": "Id"
}, {
"mDataProp": "Name"
}, {
"mDataProp": "Actions"
}],
"rowCallback": function (row, data, index) {
var newBtns = '<i class="fa fa-pencil"></i> ';
// $(row).append(newBtns);
$('td:eq(2)', row).html(newBtns);
},
language: {
paginate: {
next: '»',
previous: '«'
},
emptyTable: "Der er ingen poster.",
sInfo: "Viser _START_ til _END_ af poster."
}
});
});
</script>
Controller:
[HttpPost]
public ActionResult LoadData()
{
try
{
var draw = Request.Form.GetValues("draw").FirstOrDefault();
var start = Request.Form.GetValues("start").FirstOrDefault();
var length = Request.Form.GetValues("length").FirstOrDefault();
//Find Order Column
var sortColumn = Request.Form.GetValues("columns[" + Request.Form.GetValues("order[0][column]").FirstOrDefault() + "][data]").FirstOrDefault();
var sortColumnDir = Request.Form.GetValues("order[0][dir]").FirstOrDefault();
int pageSize = length != null ? Convert.ToInt32(length) : 0;
int skip = start != null ? Convert.ToInt32(start) : 0;
int recordsTotal = 0;
var v = (from a in _db.AllRoles select a); //Table contains only two Columns - Id and Name
//SORT
if (!(string.IsNullOrEmpty(sortColumn) && string.IsNullOrEmpty(sortColumnDir)))
{
v = v.OrderBy(sortColumn + " " + sortColumnDir);
}
recordsTotal = v.Count();
var data = v.Skip(skip).Take(pageSize).ToList();
return Json(new { draw = draw, recordsFiltered = recordsTotal, recordsTotal = recordsTotal, data = data }, JsonRequestBehavior.AllowGet);
}
catch (Exception ex)
{
throw;
}
}
The issue is due to column difference may be but I don't know how to solve it as implementing ServerSide Datatable for first time.
Thanks in advance.

I modified the below section in my Code to solve the Error.
"aoColumns": [{
"mDataProp": "Id"
}, {
"mDataProp": "Name"
}, {
"mDataProp": "Actions",
"defaultContent": '<i class="fa fa-pencil"></i> '
}],
I added defaultContent for that column as it is not getting values from Database/Sp.
P.S. Answer provided by #dee is also correct and will solve the error. Both are the Solutions to this Question.

The link in the error message provides very good information about what is the problem. You have specified three columns for the DataTable function but as you write in the comment Table contains only two Columns - Id and Name.
"aoColumns": [{
"mDataProp": "Id"
}, {
"mDataProp": "Name"
}, {
"mDataProp": "Actions"
}],
The Resolution section of the document tells what is needed to do:
If using columns ensure that you have specified exactly the number of columns that are present in the HTML for the table.
So you will need the transform the result of the query into another class which will have additional property for Actions. HTH

Model and Computed Property interaction in Vue.js

Using vue.js I am trying to build a simple task manager.
When a user clicks the "complete" checkbox I want two things to happen:
If the "Show all tasks" is unchecked, hide the task.
Send an ajax request to the server to mark the task as complete/open.
The impotent parts are shown below:
<div id="tasks-app">
<input type="checkbox" id="checkbox" v-model="show_all">
<label for="checkbox">Show all tasks</label><br>
<table class="table">
<tr><th v-for="column in table_columns" v-text="column"></th><tr>
<tr v-for="row in visibleTasks" :class="{danger: !row.daily_task.complete && row.daily_task.delayed, success: row.daily_task.complete}">
<td v-text="row.task.name"></td>
<td v-text="row.task.deadline"></td>
<td v-text="row.daily_task.status"></td>
<td v-text="row.daily_task.task_user"></td>
<td>
<input type="checkbox" v-on:change="updateStatus(row)" v-model="row.daily_task.complete" >Complete</input>
</td>
<td><input v-model="row.daily_task.delay_reason"></input></td>
</table>
</div>
And the VUE.js code:
app = new Vue({
el: '#tasks-app',
data: {
table_columns: ['Task','Deadline','Status','User','Actions','Reason'],
tasks: [],
filter_string: '',
show_all: false
},
computed: {
visibleTasks() {
show_all = this.show_all
if(show_all){
search_filter = this.tasks
}else{
search_filter = _.filter(this.tasks,function(task){
return !task.daily_task.complete;
})
}
return search_filter
}
},
methods: {
updateStatus(row){
var id = row.daily_task.id
var complete = row.daily_task.complete
if(complete){
axios.get('set_task_complete/' + id)
}else{
axios.get('set_task_open/' + id)
}
}
}
})
If the show all checkbox is checked, this works as expected. The data changes and then the updateStatus function is called.
If however the show all checkbox is unchecked, the visibleTasks will trigger and the logic for the updateStatus will fail, as the row will be hidden and the ID that is send to the server will be off by one. If the row hides before updateStatusis called the wrong row is passed to the updateStatus function.
I could solve this by adding a filter update at the end of updateStatus function but that does not seems to utilize the Vue.js library. Could someone help me what components of Vue you would use to solve this problem?

You can simplify a lot if you separate the logic:
Loop over every tasks (completed or not) to display them (without considering show_all)
Update tasks with v-on:click="updateStatus(row)"
On each tr, add v-show="show_all || !row.status.complete"

Your problem is use both change event handle and model. Both actually, trigger at same time when you click on the checkbox.
<input type="checkbox" v-on:change="updateStatus(row)" v-model="row.daily_task.complete" >Complete</input>
You should edit your code use only v-on:change="updateStatus(row)". After updateStatus complete ajax calls toggle row.daily_task.complete to trigger visibleTasks to update your view.
updateStatus(row){
var id = row.daily_task.id
var complete = !row.daily_task.complete
var p;
if(complete){
p = axios.get('set_task_complete/' + id)
}else{
p = axios.get('set_task_open/' + id)
}
p.then(() => row.daily_task.complete = complete)
}

I've refactored your code a bit and it seems to work fine:
you shouldn't use v-on:change, instead, use <input type="checkbox" v-on:click="updateStatus(row)" v-bind:checked="row.daily_task.complete">
Don't update row.daily_task.complete straight away, update it only when the asynchronous axios is complete.
const fakeUpdateComplete = (id) => {
return new Promise((resolve, reject) => { resolve(true); });
};
const fakeUpdateIncomplete = (id) => {
return new Promise((resolve, reject) => { resolve(true); });
};
const app = new Vue({
el: '#tasks-app',
data: {
history: [],
table_columns: ['Task','Deadline','Status','User','Actions','Reason'],
tasks: [
{
task: {
name: 'A',
deadline: '2017-01-01',
},
daily_task: {
id: 1,
status: '',
task_user: '',
complete: true,
delayed: false,
delay_reason: ''
}
},
{
task: {
name: 'B',
deadline: '2017-01-02',
},
daily_task: {
id: 2,
status: '',
task_user: '',
complete: false,
delayed: false,
delay_reason: ''
}
},
{
task: {
name: 'C',
deadline: '2017-01-03',
},
daily_task: {
id: 3,
status: '',
task_user: '',
complete: false,
delayed: false,
delay_reason: ''
}
},
{
task: {
name: 'D',
deadline: '2017-01-03',
},
daily_task: {
id: 4,
status: '',
task_user: '',
complete: true,
delayed: false,
delay_reason: ''
}
},
{
task: {
name: 'E',
deadline: '2017-01-03',
},
daily_task: {
id: 5,
status: '',
task_user: '',
complete: false,
delayed: false,
delay_reason: ''
}
}
],
filter_string: '',
show_all: true
},
computed: {
visibleTasks() {
const show_all = this.show_all
let search_filter;
if(show_all){
search_filter = this.tasks
}else{
console.log(this.tasks);
search_filter = this.tasks.filter(task => {
return !task.daily_task.complete
});
}
return search_filter
}
},
methods: {
updateStatus(row){
const id = row.daily_task.id;
const complete = !row.daily_task.complete;
if (complete) {
fakeUpdateComplete(id).then(() => {
this.history.push(`Task ${row.task.name} with id ${row.daily_task.id} is marked as complete`);
row.daily_task.complete = !row.daily_task.complete;
});
} else {
fakeUpdateIncomplete(id).then(() => {
this.history.push(`Task ${row.task.name} with id ${row.daily_task.id} is marked as incomplete`);
row.daily_task.complete = !row.daily_task.complete;
});
}
/*
if(complete){
axios.get('set_task_complete/' + id)
}else{
axios.get('set_task_open/' + id)
}
*/
}
}
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.4.2/vue.js"></script>
<div id="tasks-app">
<input type="checkbox" id="checkbox" v-model="show_all">
<label for="checkbox">Show all tasks</label><br>
<table class="table">
<tr><th v-for="column in table_columns" v-text="column"></th><tr>
<tr
v-for="row in visibleTasks"
:class="{danger: !row.daily_task.complete && row.daily_task.delayed, success: row.daily_task.complete}"
>
<td>{{row.task.name}}</td>
<td>{{row.task.deadline}}</td>
<td>{{row.daily_task.status}}</td>
<td>{{row.daily_task.task_user}}</td>
<td>
<input type="checkbox" v-on:click="updateStatus(row)" v-bind:checked="row.daily_task.complete">
<label for="complete">Complete</label>
</td>
<td><input v-model="row.daily_task.delay_reason" /></td>
</tr>
</table>
<div>
<div><b>Data:</b></div>
<div>{{this.tasks}}</div>
</div>
<div>
<div><b>History:</b></div>
<div v-for="item in history">
{{item}}
</div>
</div>
</div>

Hyperlink gets disabled when reinitializing JQuery DataTable

The following code samples demonstrates how I initialize a jQuery Datatable with HTML, knockout and typescript
HTML:
<table id="coursemoment-info-table" class="table table-hover">
<thead>
<tr >
// headers
</tr>
</thead>
<tbody>
<!-- ko foreach: selectedCourseMoment().courseApplications -->
<tr>
<td>
<a data-bind="{text: ssn, attr:{ href: '/Medlem/' + ssn} }"></a>
</td>
<td data-bind="text:name + ' ' + surname"></td>
.
.
.
</tr>
<!-- /ko-->
</tbody>
</table>
Typescript:
private initCourseMomentInformationDataTable(): void {
$("#coursemoment-info-table").DataTable({
pageLength: 5,
order: [1, 'desc'],
language: {
url: "/Assets/js/jquery-datatable-swedish.json"
}
});
}
I have had some problems with reinitializing the table, but I managed to handle it with first clearing the datatable, and then adding rows to the datatable and redraw it.
if (this.tableInitiliazed) {
$("#coursemoment-info-table").DataTable().clear().draw();
for (var i = 0; i < data.courseApplications.length; i++) {
var application = data.courseApplications[i];
$("#coursemoment-info-table").DataTable().row.add(
[
application.ssn,
// blah blah yada yada
]).draw();
}
This does indeed reinitiliaze the datatable, but it does not put a hyperlink to the first column as it does when initializing the table. All the other table settings are correct, such as language and pagelength.
Since I add one row at a time, with the multiple columns I do not know how to set column settings for "applications.ssn" directly. I have tried to initialize the datatable in the viewmodel with typescript but I get the same problem.
Any ideas how to reinitialize and put a hyperlink setting for a specific column?

I think you want to use Datatables render to create your link. so here is a custom data binder for data table that uses render to create the link.
here is the fiddle to see it in action. http://jsfiddle.net/LkqTU/35823/
ko.bindingHandlers.dataTable = {
init: function(element, valueAccessor, allBindingsAccessor) {
var value = valueAccessor(),
rows = ko.toJS(value);
allBindings = ko.utils.unwrapObservable(allBindingsAccessor()),
$element = $(element);
var table = $element.DataTable( {
data: rows,
columns: [
{ data: "id" },
{ data: "firstName" },
{ data: "lastName" },
{ data: "phone" },
{
data: "ssn",
"render": function ( data, type, full, meta ) {
return '<a href="/Medlem/'+data+'">' + data + '<a>';
}
}
]
} );
ko.utils.domNodeDisposal.addDisposeCallback(element, function() {
$element.dataTable().fnDestroy();
});
value.subscribe(function(newValue) {
rows = ko.toJS(newValue)
console.log(rows);
$element.find("tbody tr").remove();
table.rows().remove().draw();
setTimeout(function(){ $.each(rows, function( index, row ) {
table.row.add(row).draw()
});
}, 0);
}, null);
}
}

UI does not update when Updating ObservableArray

When a user clicks on a row from a list in the UI (html table tblAllCert), I have a click event that fires to populate another observable array that should populate a second html table (tblCertDetails). My click event fires, I can see data come back, and i can see data in the observable array, but my view does not update.
Here is an overview of the sequence in the code-
1. user clicks on row from html table tblAllCert, which fires selectThing method.
2. In viewmodel code, selectThing passes the row data from the row selected to the GetCertificateDetails(row) method.
3. GetCertificateDetails(row) method calls getCertDetails(CertificateDetails, source) function on my data service (the data service gets data from a web api). getCertDetails(CertificateDetails, source) function returns an observable array.
4. once the data is returned to selectThing, CertificateDetails observable array is populated. It does get data to this point.
Step 5 should be updating the UI (specifically tblCertDetails html table), however the UI does not get updated.
Here is my view-
<table id="tblAllCert" border="0" class="table table-hover" width="100%">
<tbody data-bind="foreach: allCertificates">
<tr id="AllCertRow" style="cursor: pointer" data-bind="click: $parent.selectThing, css: { highlight: $parent.isSelected() == $data.lwCertID }">
<td>
<ul style="width: 100%">
<b><span data-bind=" text: clientName"></span> (<span data-bind=" text: clientNumber"></span>) <span data-bind=" text: borrowBaseCount"></span> Loan(s) </b>
<br />
Collateral Analyst: <span data-bind=" text: userName"></span>
<br />
Certificate: <span data-bind="text: lwCertID"></span> Request Date: <span data-bind=" text: moment(requestDate).format('DD/MMM/YYYY')"></span>
</td>
</tr>
</tbody>
</table>
<table id="tblCertDetails" border="0" class="table table-hover" width="100%">
<tbody data-bind="foreach: CertificateDetails">
<tr id="Tr1" style="cursor: pointer">
<td>
<ul style="width: 100%">
<b>Loan: <span data-bind=" text: loanNum"></span>
</td>
</tr>
</tbody>
</table>
My viewmodel-
define(['services/logger', 'durandal/system', 'durandal/plugins/router', 'services/CertificateDataService'],
function (logger, system, router, CertificateDataService) {
var allCertificates = ko.observableArray([]);
var myCertificates = ko.observableArray([]);
var isSelected = ko.observable();
var serverSelectedOptionID = ko.observable();
var CertificateDetails = ko.observableArray([]);
var serverOptions = [
{ id: 1, name: 'Certificate', OptionText: 'lwCertID' },
{ id: 2, name: 'Client Name', OptionText: 'clientName' },
{ id: 3, name: 'Client Number', OptionText: 'clientNumber' },
{ id: 4, name: 'Request Date', OptionText: 'requestDate' },
{ id: 5, name: 'Collateral Analyst', OptionText: 'userName' }
];
var activate = function () {
// go get local data, if we have it
return SelectAllCerts(), SelectMyCerts();
};
var vm = {
activate: activate,
allCertificates: allCertificates,
myCertificates: myCertificates,
CertificateDetails: CertificateDetails,
title: 'Certificate Approvals',
SelectMyCerts: SelectMyCerts,
SelectAllCerts: SelectAllCerts,
theOptionId: ko.observable(1),
serverOptions: serverOptions,
serverSelectedOptionID: serverSelectedOptionID,
SortUpDownAllCerts: SortUpDownAllCerts,
isSelected: isSelected,
selectThing: function (row, event) {
CertificateDetails = GetCertificateDetails(row);
isSelected(row.lwCertID);
}
};
serverSelectedOptionID.subscribe(function () {
var sortCriteriaID = serverSelectedOptionID();
allCertificates.sort(function (a, b) {
var fieldname = serverOptions[sortCriteriaID - 1].OptionText;
if (a[fieldname] == b[fieldname]) {
return a[fieldname] > b[fieldname] ? 1 : a[fieldname] < b[fieldname] ? -1 : 0;
}
return a[fieldname] > b[fieldname] ? 1 : -1;
});
});
return vm;
function GetCertificateDetails(row) {
var source = {
'lwCertID': row.lwCertID,
'certType': row.certType,
}
return CertificateDataService.getCertDetails(CertificateDetails, source);
}
function SortUpDownAllCerts() {
allCertificates.sort();
}
function SelectAllCerts() {
return CertificateDataService.getallCertificates(allCertificates);
}
function SelectMyCerts() {
return CertificateDataService.getMyCertificates(myCertificates);
}
});
And releveant excerpt from my data service-
var getCertDetails = function (certificateDetailsObservable, source) {
var dataObservableArray = ko.observableArray([]);
$.ajax({
type: "POST",
dataType: "json",
url: "/api/caapproval/CertDtlsByID/",
data: source,
async: false,
success: function (dataIn) {
ko.mapping.fromJSON(dataIn, {}, dataObservableArray);
},
error: function (error) {
jsonValue = jQuery.parseJSON(error.responseText);
//jError('An error has occurred while saving the new part source: ' + jsonValue, { TimeShown: 3000 });
}
});
return dataObservableArray;
}
Ideas of why the UI is not updating?

When you're using Knockout arrays, you should be changing the contents of the array rather than the reference to the array itself. In selectThing, when you set
CertificateDetails = GetCertificateDetails(row);
the new observableArray that's been assigned to CertificateDetails isn't the same observableArray that KO bound to your table.
You're very close to a solution, though. In your AJAX success callback, instead of creating a new dataObservableArray and mapping into that, you can perform the mapping directly into parameter certificateDetailsObservable. ko.mapping.fromJSON should replace the contents of the table-bound array (you would also get rid of the assignment in selectThing).

How to get the row ID from a Kendo Grid with a double click

I'm currently testing the Kendo UI MVC Extensions Beta.
I'm trying to implement a double click - edit but I don't know how I can get the rowId.
JavaScript:
$('#GridPedidos table tr').live('dblclick', function () {
alert(' grid dbl clicked');
});
View:
#(Html.Kendo().Grid(Model) _
.Name("GridPedidos") _
.Columns(Sub(column)
column.Bound(Function(item) item.idPedidoDocumentacao).Width("5%")
column.Bound(Function(item) item.descEstadoPedidoDoc).Width("25%")
column.Bound(Function(item) item.descTipoPedidoDoc).Width("25%")
column.Bound(Function(item) item.data).Width("25%").Format("{0:dd-MM-yyyy}")
column.Command(Function(item) item.Destroy()).Width("10%")
End Sub) _
.DataSource(Sub(ds)
ds.Ajax().ServerOperation(False).Read(Sub(s)
s.Action("GetListaGrid", "listaPedidos")
End Sub).Create(Sub(s)
s.Action("detalhePedido", "Pedidos")
End Sub).Model(Sub(m)
m.Id(Function(p) p.idPedidoDocumentacao)
End Sub).Destroy(Sub(d)
d.Action("apagaPedido", "listaPedidos")
End Sub)
End Sub) _
.Selectable()
)
I can detect the double click with this function, but how do I get the id?

I've done this example with client side api and an equivalent with the MVC extensions.
Create a grid div, to create a grid at run time.
<div id="grid" style="width: 400px;"></div>
Created a row template so that I could give the element an id tag.
<script id="rowTemplate" type="text/x-kendo-tmpl">
<tr>
<td id="EmployeeId">
${ EmployeeID }
</td>
<td>
${ FirstName }
</td>
<td>
${ LastName }
</td>
</tr>
</script>
Initialize the grid and bind data.
<script>
$(document).ready(function () {
$("#grid").kendoGrid({
columns: [
"EmployeeID"
,{
field: "FirstName",
title: "First Name"
},{
field: "LastName",
title: "Last Name"
}
],
dataSource: {
data: [
{
EmployeeID: 0,
FirstName: "Joe",
LastName: "Smith"
}, {
EmployeeID: 1,
FirstName: "Jane",
LastName: "Smith"
}
],
schema: {
model: {
id: "EmployeeID",
fields: {
EmployeeID: {type: "number" },
FirstName: { type: "string" },
LastName: { type: "string" }
}
}
},
pageSize: 10
},
scrollable: {
virtual: true
},
sortable: true,
pageable: true,
rowTemplate: kendo.template($("#rowTemplate").html())
});
//Add a double click event that will return the text in the EmployeeId column.
$('#grid table tr').dblclick(function () {
alert($(this).find("td[id=EmployeeId]")[0].innerText);
});
});
</script>
--EDIT--
I've also gone ahead and created an MVC extensions example, the approach is the same via the template route.
Model class:
public class Employee
{
public int EmployeeId { get; set; }
public string Name { get; set; }
}
View code:
<script type="text/javascript">
function OnDataBound() {
$('#OtherGrid table tr').dblclick(function () {
alert($(this).find("span[id=EmployeeId]")[0].innerText);
});
}
</script>
#(Html.Kendo().Grid<Employee>()
.Name("OtherGrid")
.Columns(columns =>
{
columns.Bound(p => p.EmployeeId).ClientTemplate("<span id=\"EmployeeId\">#: EmployeeId #</span>");
columns.Bound(p => p.Name);
})
.DataSource(dataSource => dataSource
.Ajax() // Specify that the data source is of ajax type
.Read(read => read.Action("GetEmployees", "Home")) // Specify the action method and controller name
)
.Events(e => e.DataBound("OnDataBound"))
)
Controller:
public ActionResult GetEmployees([DataSourceRequest]DataSourceRequest request)
{
List<Employee> list = new List<Employee>();
Employee employee = new Employee() { EmployeeId = 1, Name = "John Smith" };
list.Add(employee);
employee = new Employee() { EmployeeId = 2, Name = "Ted Teller" };
list.Add(employee);
return Json(list.ToDataSourceResult(request));
}
Hope this helps!

I achieved what i was looking for with this js
$('#GridPedidos table tr').live('dblclick', function () {
var grid = $("#GridPedidos").data("kendoGrid");
var dItem = grid.dataItem($(this));
if (dItem != null) {
detalhePedido(dItem.id);
}
});

To open edit mode with double click you need to register the double click event with the grid like this:
var grid = $("#grid").data("kendoGrid");
grid.element.delegate("tbody>tr", "dblclick", function () {
grid.editRow($(this));
});