Questions on UI for ASP.NET Core Forum

4 answers

2.8K+ views

Hi! im trying to migrate project from .net core2.2. to .net core3.0.

when i add line

services.AddKendo();

i get an error:

System.AggregateException: 'Some services are not able to be constructed (Error while validating the service descriptor '

ServiceType: Kendo.Mvc.Rendering.IKendoHtmlGenerator Lifetime: Transient ImplementationType: Kendo.Mvc.Rendering.KendoHtmlGenerator

': Could not load type 'Microsoft.AspNetCore.Mvc.Internal.ClientValidatorCache' from assembly 'Microsoft.AspNetCore.Mvc.Core, Version=3.0.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.)'

without this line, everything works fine

i use kendo.mvc dll , 2019.1.220.0 version

any soluiton?

General Discussions

answered on 12 Feb 2021

3 answers

251 views

Possible wrong Polish localization

Hi, collegues

i do simple test multilanguage site and has possible trouble: use pl culture and calendar display dates in format dd.MM.yyyy. But ASP.Net Core 3.1 with Polish culture dont accept values in this format for DateTime.TryParse. Look at kendo.culture.pl.min.js and found format section:

patterns: {
d: "dd.MM.yyyy",
D: "dddd, d MMMM yyyy",
F: "dddd, d MMMM yyyy HH:mm:ss",
g: "dd.MM.yyyy HH:mm",
G: "dd.MM.yyyy HH:mm:ss",
m: "d MMMM",
M: "d MMMM",
s: "yyyy'-'MM'-'dd'T'HH':'mm':'ss",
t: "HH:mm",
T: "HH:mm:ss",
u: "yyyy'-'MM'-'dd HH':'mm':'ss'Z'",
y: "MMMM yyyy",
Y: "MMMM yyyy"
}

but simple test with net console display for me:
Format:d, value: 2021-02-05
Format:D, value: 5 lutego 2021
Format:F, value: 5 lutego 2021 17:17:07
Format:g, value: 2021-02-05 17:17
Format:G, value: 2021-02-05 17:17:07
Format:m, value: 5 lutego
Format:M, value: 5 lutego
Format:s, value: 2021-02-05T17:17:07
Format:t, value: 17:17
Format:T, value: 17:17:07
Format:u, value: 2021-02-05 17:17:07Z
Format:y, value: luty 2021
Format:Y, value: luty 2021

I'm found this text: Poland adopted the ISO 8601 standard for date format in official, especially electronic, communication in 2002. For everyday usage and for less official papers, however, the traditional formats d.m.[yy]yy or dd.mm.[yy]yy (i.e., 7.8.2008, 07.08.2008, 07.08.08) are very common in Poland because of speaking order: "day month year".

I think, we have inconsistent behaviour in client and server parts.

PS I'm not Polish and can't told which format is correct.

Sincerelly yours,

Calendar

answered on 11 Feb 2021

6 answers

562 views

Grid does not render with Commands

I am attempting to create a grid that has the Edit (Update) command available.

When I run the application with the edit options commented out it renders, but when I leave them in I get no errors on the front end and the page is blank. The read controller is not even being hit.

Here is the view code. Any ideas? It seems adding the Edit options somehow breaks the grid.

@using Kendo.Mvc.UI

@(Html.Kendo().Grid<HoldingOvenEditor.Models.HOGridModel>()

.Name("grid")

.Columns(columns =>

{

columns.Bound(p => p.OvenName);

columns.Command(command => { command.Edit(); }).Width(160); //<= Comment this out to work correctly

})

.Editable(editable => editable.Mode(GridEditMode.PopUp)) //<= Comment this out to work correctly

.DataSource(dataSource => dataSource

.Ajax()

.Model(model => {

model.Id(p => p.OvenName);

model.Field(x => x.OvenName).Editable(true);

})

.Read(read => read.Action("ResourceGrid_Read", "Grid"))

.Update(update => update.Action("EditingPopup_Update", "Grid")) //<= Comment this out to work correctly

)

Grid

answered on 11 Feb 2021

1 answer

166 views

Load children on initialize last data bound

I need to display a hierarchy with checkboxes. For this I want to use TreeView. After the hierarchy finishes loading I have to do some actions. So the TreeView is configured with LoadOnDemand: false and a function is attached to the "dataBound" event. However it seems that the data bound is called after every call to the server. Is there an event that is triggered after all the nodes have been loaded? How can I know that the databound is the last one (all the nodes have been loaded)?

TreeView

answered on 11 Feb 2021

3 answers

462 views

[Solved] Validation Message Bubble

Hello,

is there any way to display a Validation-Message Bubble like in a grid Editor in a TextBox?
I.e. I have this code:

Model:

public class Promotion

{

[StringLength(10]

[RegularExpression("^\\$?[A-Z0-9]+$")]

[Required()]

public String Code { get; set; }

....

}

View:

@using (Html.BeginForm())

{

<div>

@(Html.LabelFor(model => model.Promotion.Code))

@(Html.Kendo().TextBoxFor(model => model.Promotion.Code))

</div>

}

If, for example, I leave it empty or enter lowercase letters into this TextBox, I would like it to show a Validation-Error-Bubble just like in a Grid Editor.

Thank you

General Discussions

answered on 11 Feb 2021

3 answers

129 views

Update spreadsheet without destroying layout

Hello Experts,

Is there a way to update the data rows and columns of a sheet after a read on the dataSource's model without it destroying the layout of the entire page?

Many thanks in advance

64d1

Spreadsheet

answered on 10 Feb 2021

1 answer

599 views

Filter Broken for DateTimeOffset Column

When using a date filter on a column bound to a DateTimeOffset property, the filter is missing all its options.

The property:

public DateTimeOffset Created { get; set; }

The column definition:

c.Bound(x => x.Created)

.Filterable(f => f

.Operators(o => o.ForDate(d => d.Clear().IsGreaterThanOrEqualTo("On or after").IsLessThan("Before")))

.Extra(true)

.UI(GridFilterUIRole.DateTimePicker)

);

When the property type is changed to DateTime, the filter works as expected.

See the attached images. (The operator dropdown just shows "NO DATA FOUND").

No errors are reported in the console.

Using:

"@progress/kendo-theme-bootstrap": "^4.30.0",
"@progress/kendo-theme-default": "^4.32.0",
"@progress/kendo-ui": "^2021.1.119",

Grid

answered on 09 Feb 2021

1 answer

340 views

Custom Popup Windows

I am using the Tag Helpers and have a grid working with the edit popup dialog. My question is how do I customize the popup? Change the title? Change the button colors or text? Change the height and width?

Grid

answered on 09 Feb 2021

1 answer

309 views

Wizard with Upload Component

Hello,

is it possible to Add the Upload Component in the Wizard. I tried it by myself but if i upload a file i get two files. My Issue is the Same like this:

https://stackoverflow.com/questions/54467957/kendo-upload-duplicating-file-after-initial-file-selection

Can Somebody post a code snippet?

Here is my test:

<div id="wizard">

<div>

<h1>Upload Labeling File</h1>

@(Html.Kendo().Upload()

.Name("files")

.Async(a=> a.SaveUrl("./Masterdata/LabelExport?handler=Save")

.RemoveUrl("./Masterdata/LabelExport?handler=Save")

)

.Validation(validation => validation.AllowedExtensions(new string[] { ".json" }))

.Validation(validation => validation.MaxFileSize(2000000))

)

<h3>Click "Next" </h3>

</div>

<div>

<h1>Personal data</h1>

<form class="k-form">

<div class="k-form-container">

<div class="k-form-field">

<label>Name: <input type="text" id="drop"></label>

</div>

<div class="k-form-field">

<label>Surname: <input type="text"></label>

</div>

</form>

</div>

<div>

<h1>Contacts data</h1>

<form class="k-form">

<div class="k-form-container">

<div class="k-form-field">

<label>Telephone: <input type="text"></label>

</div>

<div class="k-form-field">

<label>Mail: <input type="text"></label>

</div>

</form>

</div>

<script>

$("#wizard").kendoWizard({

steps: [{

title: "Welcome",

}, {

title: "Personal Details",

}, {

title: "Contact Details"

}]

});

</script>

Wizard

answered on 09 Feb 2021

3 answers

4.7K+ views

Uncaught RangeError: Maximum call stack size exceeded

Hi I'm getting a JS error when trying to using cascading dropdowns (defined below)

@(Html.Kendo().DropDownList()

.Name("makes")

.HtmlAttributes(new { style = "width:100%" })

.OptionLabel("Select make...")

.DataTextField("text")

.DataValueField("value")

.DataSource(source =>

{

source.Read(read =>

{

read.Url("/NoMatchVehicle/GetMakeValues");

});

})

)

@(Html.Kendo().DropDownList()

.Name("models")

.HtmlAttributes(new { style = "width:100%" })

.OptionLabel("Select model...")

.DataTextField("text")

.DataValueField("value")

.DataSource(source =>

{

source.Read(read =>

{

read.Url("/NoMatchVehicle/GetModelValues?make=");

read.Data("makes");

})

.ServerFiltering(true);

})

.CascadeFrom("makes")

.Enable(false)

.AutoBind(false)

)

The first dropdown is populated fine but upon the selection on the first dropdown I get a JS error

jquery.js:8641 Uncaught RangeError: Maximum call stack size exceeded
at Function.isArray (<anonymous>)
at buildParams (jquery.js:8641)

Any Ideas on why this could be happening I am basing this of this example

DropDownList

answered on 09 Feb 2021