I have set a small size to the MultiSelect. I noticed that the Summary Tag that contains the "1 more selected" text does not change - its size always remains the same regardless of the component size.
Reproduction: https://blazorrepl.telerik.com/cxFvPxvh58SMoekS04.
The Roundness setting of the MultiSelect also does not affect the summary tag.
I'm seeing a scroll bar appear then disappear as I type. Repeatedly typing "a" in the box will show/hide the scroll bar. Also typing "a" then backspace has the same behavior.
<TelerikMultiSelect Filterable="true" Data="@Countries"
@bind-Value="@Values"
Placeholder="Enter Balkan country, e.g., Bulgaria"
Width="350px" ClearButton="true"
AutoClose="false">
</TelerikMultiSelect>
@if (Values.Count > 0)
{
<ul>
@foreach (var item in Values)
{
<li>@item</li>
}
</ul>
}
@code {
List<string> Countries { get; set; } = new List<string>();
List<string> Values { get; set; } = new List<string>();
protected override void OnInitialized()
{
Countries.Add("Albania");
Countries.Add("Bosnia & Herzegovina");
Countries.Add("Bulgaria");
Countries.Add("Croatia");
base.OnInitialized();
}
}
---
ADMIN EDIT:
Currently, the component works the following way:
The scrollbar is shown by the skeleton and is always present (visible on step 3). The tricky part is that If the user is typing very fast, the Blazor framework bundles 2 renderings together and thus the scrollbar is not visible. The result is that the user sees a very brief flicker with the skeleton. Adding a small delay before showing the skeleton on step 3 will prevent the user from seeing the skeleton and thus remove the impression of seeing a "flicker".
As a workaround, you can hide the skeleton with CSS. This is applicable for all "select" components
<TelerikMultiSelect>
<MultiSelectSettings>
<MultiSelectPopupSettings Class="no-skeleton"></MultiSelectPopupSettings>
</MultiSelectSettings>
</TelerikMultiSelect>
<TelerikComboBox>
<ComboBoxSettings>
<ComboBoxPopupSettings Class="no-skeleton"></ComboBoxPopupSettings>
</ComboBoxSettings>
</TelerikComboBox>
<style>
.no-skeleton .k-skeleton {
display: none;
}
</style>
---
Like https://docs.telerik.com/blazor-ui/components/combobox/custom-value and https://www.telerik.com/kendo-angular-ui/components/dropdowns/multiselect/custom-values/ so the user can input tags on their own without them being in the app data source.
---
ADMIN EDIT
The following sample may be useful in implementing this in the meantime: https://github.com/telerik/blazor-ui/tree/master/multiselect/add-new-item
---
When AutoClose is set to false and you select more than one item, then only the first one will be highlighted in the popup. Items are selected and present in the input but are visually highlighted.
Reproduction
1. Run this REPL sampleI would like to add a feature similar to the Tag Mode in the Kendo suite
===========
ADMIN EDIT
===========
In the meantime, there are two possible workarounds:
1. Mimic the desired 'single' TagMode behavior and display the number of selected items inside the MultiSelect, instead of the selected items themselves.
This approach uses custom CSS, which hides the list of selected items and displays a dynamically updated count value. The most important bits are highlighted:
UI for Blazor 2.30
<TelerikMultiSelect Data="@Products" Class="single-tag-mode"
@bind-Value="@SelectedProductIDs"
ValueField="@nameof(Product.ProductID)"
TextField="@nameof(Product.ProductName)"
Placeholder="Select Products">
</TelerikMultiSelect>
<style>
.single-tag-mode ul.k-reset {
float: left;
}
.single-tag-mode ul.k-reset li.k-button {
display: none;
}
.single-tag-mode ul.k-reset:before {
content: "Selected items: @SelectedProductIDs.Count";
display: inline-block;
line-height: 1.8em;
padding: 0 7px;
vertical-align: bottom;
border: 1px solid rgba(0, 0, 0, 0.08);
background: #f5f5f5 linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.02));
}
</style>
@code {
List<Product> Products = new();
List<int> SelectedProductIDs = new();
protected override async Task OnInitializedAsync()
{
for (int i = 1; i <= 10; i++)
{
Products.Add(new Product()
{
ProductID = i,
ProductName = "ProductName " + i
});
}
await base.OnInitializedAsync();
}
public class Product
{
public int ProductID { get; set; }
public string ProductName { get; set; }
}
}
UI for Blazor 3.0
<TelerikMultiSelect Data="@Products" Class="single-tag-mode"
@bind-Value="@SelectedProductIDs"
ValueField="@nameof(Product.ProductID)"
TextField="@nameof(Product.ProductName)"
Placeholder="Select Products">
</TelerikMultiSelect>
<style>
.single-tag-mode .k-input-values {
float: left;
}
.single-tag-mode .k-input-values .k-chip {
display: none;
}
.single-tag-mode .k-input-values:before {
content: "Selected items: @SelectedProductIDs.Count";
display: inline-block;
line-height: 1.8em;
padding: 0 7px;
vertical-align: bottom;
border: 1px solid rgba(0, 0, 0, 0.08);
background: #f5f5f5 linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.02));
}
</style>
@code {
List<Product> Products = new();
List<int> SelectedProductIDs = new();
protected override async Task OnInitializedAsync()
{
for (int i = 1; i <= 10; i++)
{
Products.Add(new Product()
{
ProductID = i,
ProductName = "ProductName " + i
});
}
await base.OnInitializedAsync();
}
public class Product
{
public int ProductID { get; set; }
public string ProductName { get; set; }
}
}
2. Restrict the component's size and allow scrolling to see all selected items.
Use some custom CSS to set desired height of the container holding the selected items (.k-chip-list) and to control its overflow. You can use the Class parameter of the Multiselect to set your custom CSS class to the main wrapping container of the component and style a specific instance of the component, not all instances on the page/app.
In terms of controlling the container's height, you can:
<style>
.my-multiselect{
overflow: auto;
max-height: 60px;
}
</style>
<TelerikMultiSelect Class="my-multiselect"
Data="@Countries"
@bind-Value="@Values"
Placeholder="Enter Balkan country, e.g., Bulgaria"
Width="350px" ClearButton="true" AutoClose="false">
</TelerikMultiSelect>
@code {
List<string> Countries { get; set; } = new List<string>();
List<string> Values { get; set; } = new List<string>();
protected override void OnInitialized()
{
Countries.Add("Albania");
Countries.Add("Bosnia & Herzegovina");
Countries.Add("Bulgaria");
Countries.Add("Croatia");
Countries.Add("Kosovo");
Countries.Add("North Macedonia");
Countries.Add("Montenegro");
Countries.Add("Serbia");
Countries.Add("Slovenia");
base.OnInitialized();
}
}
In the MultiSelect Component you have Item, Footer, and Header Template sub components. I see no way of providing a template for the selected items. This would be a very nice feature to have.
My specific use case it that I would like to add a tool tip to the selected tags.
Thanks
I have a requirement to be able to select multiple values. I have filtering enabled, but I only want the user to be able to select valid values and not enter custom data. My approach would be to clear any invalid data when the control loses focus. I want the MultiSelect input to be cleared when it looses focus (similar to the ComboBox behavior).
=========================
ADMIN EDIT
=========================
In the meantime, such behavior could be achieved with a JavaScript function called through the JS Interop.
@inject IJSRuntime JsInterop
<TelerikMultiSelect Filterable="true" Data="@Countries"
@bind-Value="@Values"
Placeholder="Enter Balkan country, e.g., Bulgaria"
Width="350px" ClearButton="true"
AutoClose="false" OnBlur="@OnBlurHandler">
</TelerikMultiSelect>
@if (Values.Count > 0)
{
<ul>
@foreach (var item in Values)
{
<li>@item</li>
}
</ul>
}
@code {
List<string> Countries { get; set; } = new List<string>();
List<string> Values { get; set; } = new List<string>();
async Task OnBlurHandler()
{
await JsInterop.InvokeVoidAsync("clearMultiselectInput");
}
protected override void OnInitialized()
{
Countries.Add("Albania");
Countries.Add("Bosnia & Herzegovina");
Countries.Add("Bulgaria");
Countries.Add("Croatia");
Countries.Add("Kosovo");
Countries.Add("North Macedonia");
Countries.Add("Montenegro");
Countries.Add("Serbia");
Countries.Add("Slovenia");
base.OnInitialized();
}
}
You can include the following script tag in your index page or place the function in a separate JavaScript file in your project. This function will clear all instances of the Multiselect inputs, so you don't have to specify separate selectors for each of them. If you only want to work with one instance, you can use another approach.
<script>
function clearMultiselectInput() {
var inputs = document.querySelectorAll(".k-multiselect .k-input-values input");
inputs.forEach(e => e.value = "")
}
</script>
I would like to have the ability to refresh the Multiselect Popup.
Currently, if the AutoClose="false" feature is applied and the items are programmatically selected, you cannot display them as selected while the Popup is opened. You need to close it first to accordingly update the selected items collection in it.
Testing this Select All Checkbox sample in Safari produces a different result compared to other browsers.
Click on the CheckBox in the MultiSelect Header Template closes the popup in Safari. In other browsers (e.g. Chrome, Firefox) the popup remains open after checking the SelectAll CheckBox.
Telerik Multi Select to have optional top level header item with check box & title "Select All" [Localizable].
If all items are selected, the display box of the Multi-Select should show "All Selected" instead of list of selected items.
Please add group header template for the MultiSelect. There are two goals:
Description
In Firefox, there are occasions in which multiple items remain focused (k-focus class is not removed from the blurred item)
Reproduction (if bug)
Second related case:
Expected (if bug)
Only one item should have the k-focus class at a time.
Browser (if bug)
Firefox
Broken Telerik UI for Blazor version (if bug)
3.5.0
To reproduce:
The following, took a bit of effort to identify where the behaviour was failing for a screen reader.
for all scenarios below the multi-select component currently has items (more than one) in it as selected.
GOOD
if keyboard focus is on text edit, and u leave the component (w/ tab key), when revisiting the component (w/ shift+tab keys) all selected items are read out correctly
BAD
if keyboard focus is on selected item, and u leave the component (w/ tab key), when revisiting the component (w/ shift+tab key) the focused (selected) item is not read out correctly.
(sorry example read out not provided)
GOOD
selected items are read out correctly when;
BAD
delete item;
the following behaviour also occurs after removing all items via a keyboard, the keyboard focus becomes lost;