Questions on Kendo UI for jQuery Forum

0 answers

327 views

Announcing Kendo UI Developer Certification

Hello

A lot of you have asked. and we delivered - Kendo UI Developer Certifications are here. http://www.telerik.com/kendo-ui/developer-certification

The test is a set of comprehensive questions that assesses your WORKING knowledge of the Kendo UI framework. We didn't want to follow the approach by other certification bodies and help 'print' certificates. Kendo UI Certification. You can see more about our approach at my blog post here http://www.telerik.com/blogs/introducing-kendo-ui-developer-certification.

Our complete support team has now gone through certification exam. Soon certification will also be a requirement for any of our partners doing Kendo UI work.

Exam topic wise, you can expect:

- Kendo UI setup in a new project.

- Kendo UI dependencies and requirements.

- Templates
- DataSources
- MVVM
- General knowledge of what widgets Kendo UI contains
- Some specific widget options questions (Grid, AutoComplete, Slider, Splitter, Scheduler)
- Mostly Kendo UI Web/Framework, very little DataViz, no Kendo UI Mobile

There is no book to study from; we'd like to certify your EXPERIENCE and WORKING knowledge of Kendo UI.

See more at: http://www.telerik.com/kendo-ui/developer-certification

Sasha Krsmanovic

General Discussions

asked on 26 Jun 2015

5 answers

824 views

Access group aggregates in group header in razor

Hi.

I have a grid written in razor, using server data source (not ajax) with grouping and aggregated columns on the group.

Now, how can I access all columns aggregates in the GroupHeaderTemplate method?

Grid

answered on 26 Jun 2015

1 answer

202 views

Drawing Image Export Z-Index Issue on Chrome

I am using kendo.drawing.drawDOM to generate an exportImage. When running this on Chrome, the z-index of elements is not taken into account and certain elements will not overlap each other based on their z-index (i.e., how they are displayed in the browser). It works perfectly on IE and Firefox - this is just a Chrome issue. Is this a known issue? Is there a workaround by any chance?

Any help is appreciated!

Drawing API

answered on 26 Jun 2015

3 answers

226 views

[Solved] Distinguish aggregated values.

Hi.

Suppose I'm using some aggregation function which gives me several values instead of one. I have seriesClick event handler

with something like following:

var dsObject = e.sender.dataSource.get(e.dataItem.markerId);

And when I click on aggregated value it returns some value from datasource and I don't know why it returns this value.

Is there any way to distinguish aggregated values from usual (from datasoure) values? Or is there any way to specify returned value in case of my aggregation function?

Thanks in advance.

Charts

answered on 26 Jun 2015

2 answers

130 views

Creating a custom view with templates not listed in the docs

I'm trying to create a custom column with the scheduler, but I always get redirected to a sample mvc program that just modifies the events template

I need to actually make a new column, not change the color of it.

The only templates I see listed in the docs are event templates. I need the schedule header. I want to display

<td>Monday</td><td>MyColumn1</td><td>MyColumn2</td><td>Tuesday</td>....

The dataHeaderTemplate only lets me change whats inside of Monday.

So my questions are, where are the lists of these templates and how do I get the default values so I can change them and create a new custom view.

This is the closest thing I've seen:

http://dojo.telerik.com/@diondirza/EbEBa

they're doing the following below. But how I get the default value for schedulerHeader and add change it for my customer view.

function onDataBound(e) {

var scheduler = e.sender,

schedulerHeader = scheduler.element.find(".k-scheduler-header table tbody tr"),

datas = scheduler.dataSource.data();

// add custom column header, do more append for more column

schedulerHeader.append("<th>Rating</th>");

schedulerHeader.append("<th>Time</th>");

// add custom column for each data

datas.forEach(function(data){

var uid = data.uid,

timeData = kendo.toString(data.start, "hh:mm") + " - " + kendo.toString(data.end, "hh:mm");

$(".k-task[data-uid='"+ uid +"']").parent()

.after("<td>" + timeData + "</td>")

.after("<td><em>no rating yet</em></td>");

});

}

Scheduler

answered on 26 Jun 2015

1 answer

146 views

Inherited Size

I saw another post back in 2012 addressing this issue of removing this value from the drop down. Is it still true that this is not supported, or has this been updated in a recent version?

I tried updating the kendo.ui.Editor.defaultTools.fontSize.options.defaultValue.value, but it didn't hold. I tried setting the defaultValue to the empty array, and that just crashed the control. Is any of this possible?

Editor

answered on 26 Jun 2015

3 answers

170 views

Notes Field in Template

So I'm trying to move some of my data binding to templates to allow conditional formatting, but I've noticed something when binding a notes field directly to a <p> tag vs. rendering it in the Template. The binding adds <br> tags in place of the carriage returns so the notes format correctly; the template does not.

Here's the template:

# if(PeopleNotes != null && PeopleNotes != '' ) { # <div class='inputWrapper' id='main_notes'>
<label for='main_notesInput'>Notes</label>
<p id='NoteField'>#: PeopleNotes #</p>
</div> # } #

Which doesn't include the <br> tag, vs:

<div class="inputWrapper" id="main_notes">
<label for="main_notesInput">Notes</label>
<p id="NoteField" data-bind="text: selectedPerson.PeopleNotes"></p>
</div>

which does. Suggestions?

Templates

answered on 26 Jun 2015

3 answers

139 views

[Solved] Internet Explorer message: not response due to long-running script

Hi,

Please help me: when I click to edit the category in: http://dojo.telerik.com/OHuHa it's error message: ...not response due to long-running script

Thanks

Grid

answered on 26 Jun 2015

3 answers

1.1K+ views

Column filter based on data type

Hello, I'm using Kendo.Mvc and Kendo.UI for developing an ASP.NET MVC web application.
I have a Grid with ajax binding that reads data from a Datatable, those data could be of different types (string, int, double, bool, ecc..).
I have no model strongly typed associated for this Grid, thus I'll check for the type of each column and I do the bind for each column based of their type.

My problem is that this binding seems not to be working, because each column filter is treated as if it were of type string.

here some code snippet:

initialization: Html.Kendo().Grid<object>()

// other code

for each column:

grid.Columns(columns =>

{

var bound = columns.Bound(Type.GetType("System." + col.Type), col.Name);

// other code

bound.Filterable(true);

})

where col.Type is an enum similar to .NET TypeCode Enumeration (https://msdn.microsoft.com/en-us/library/system.typecode(v=vs.110).aspx)

I've also tried to add manually the type of column, after initialization of the grid, with some client side javascript code:

$.each(cols, function(i, e) {

var index = grid.columns.map(function(obj) {

return obj.field;

})

.indexOf(e.Name);

if(index > -1) {

var item = grid.columns[index];

switch(e.Type) {

case "string":

item.type = e.Type;

break;

case "double":

case "integer":

item.type = "number";

break;

case "boolean":

item.type = e.Type;

break;

case "datetime":

item.type = "date";

break;

}

});

after doing this, I have a new "type" property for each column inside grid.columns but seems to not affect each column filter.

Some suggestion to achieve this?
Thanks a lot!

Grid

answered on 26 Jun 2015

1 answer

329 views

Kendo UI control's initialization - what is the good approach

Hi :)

In my web application I am using Kedno UI Controls for implementing front-end side controls and user interaction. Most of the web application code is written in java-script, so the general approach is to go client side.

On the Kendo UI demo website, we have 2 approaches for initializing kendo grid in case of using MVVM pattern and bindings (as a sample control, but this should apply to other controls):

1/ Data attribute initialization - part of example for brevity

<div data-role="grid"

date-scrollable="true"

data-editable="true"

data-toolbar="['create', 'save']"

data-columns="[

{ 'field': 'ProductName', 'width': 270 },

{ 'field': 'UnitPrice' },

]"

data-bind="source: products,

visible: isVisible, events: { save: onSave }"

style="width: 480px; height: 200px">

</div>

Full example: http://demos.telerik.com/kendo-ui/grid/mvvm

2/ Custom binding (angular way) - part of example for brevity

<div kendo-grid data-bind="options: mainGridOptions">

</div>

Javascript file - ViewModel/Controller - Scope ect...

.mainGridOptions = {

dataSource: {

type: "odata",

transport: {

read: "<url...>"

},

pageSize: 5,

},

sortable: true,

pageable: true,

columns: [{

field: "FirstName",

title: "First Name",

width: "120px"

},{

field: "LastName",

title: "Last Name",

width: "120px"

},{

field: "Country",

width: "120px"

}

}]

};

In the binding for the grid, we pass all required options for particular control. Full similar angular example: http://demos.telerik.com/kendo-ui/grid/angular

Concerning information above I have these questions:

Which approach is better and why (pron and cons) - to use data attributes for settings or to keep all the control settings in the view model in js and bind it easy to the control like angular does? Taking into account long term application development - support of tools and frameworks (i.e. Typescript), complex settings for controls
Is this bad idea or breaks MVVM pattern in anyway, that view model contains kendo object after it was initialized, so view model knows what is the control behind it? Of course not in every case, but in the situation when we need to do some workaround on our kendo control in js. In this case we don't need to use jquery selector to get control's data, because binding will give us a reference to the kendo control in the view model after its initialization.

This approach was implemented in Kendo Binding for Angular http://www.telerik.com/blogs/a-few-angular-kendo-ui-best-practices -> Leverage Widget References.

Thank you all for the feedback and answers.

Grid

answered on 26 Jun 2015