Please add a property (e.g., OpenOnFocus or AutoOpenOnEdit) to dropdown-based components (such as DropDownList, ComboBox, or inline grid editors) to automatically open the dropdown when the component gains focus or enters edit mode.
Why This Matters
In data-dense UIs — like inline grid editing, cutover task assignment, or status changes — users often need to:
- Quickly select from a known list, such as Status, Owner, or Type.
- Tab rapidly through form fields without needing extra clicks.
- Use keyboard-only navigation efficiently.
Currently, dropdowns often require an additional manual click to open — which slows down power users and disrupts workflows in editable grids.
I have come across a few instances where it would be awesome if the Data Collection on a MultiSelect, or even a DropDown could have a dynamic property to denote if the option in the collection is selectable. The use case is around items being disabled but remain intact on historical records. If I remove the item currently from the collection then the component no longer shows the item as selected because it isnt in the collection. If I leave the item in the collection, then it shows, but, can then be selected on future items, which I dont want. Would be awesome if I could pass a component parameter, similar to TextField, which is the bool property for if the option in the dropdown is selectable/disabled. This would then make it so that the item could be REMOVED, but not readded or selected on future records unless the value for the property was set back to true.
Grids honor the [DisplayFormat(DataFormatString ... )] annotation for column content, but the FilterMenuType.CheckBoxList filter menu and the TelerikCheckBoxListFilter component don't. This is particularly noteworthy for formatting that truncates the contents such as DateTime which frequently tracks data smaller than user's care about, which can generate many visually identical checkboxes. To go along with the requested change, it would be nice if the filter matched off of the DisplayFormat string considering that is what the user sees and would therefore be referencing, since again, many DataFormatStrings can truncate data.
Because the TelerikCheckBoxListFilter component requires the field to match the data type of the grid's field, there isn't a way for the programmer to choose to show the filter menu with a checklist that matches the displayed values without building a fully custom FilterMenuTemplate with their own foreach loop and then figuring out a way to construct a CompositeFilterDescriptor filled with bracketing FilterDescriptors to account for the range of matching values. This is doubly troublesome since using the structure of CompositeFilterDescriptors needed to do that is not supported in the FilterMenuTemplate without also having to override the FilterMenuButtonsTemplate.
Generally speaking, it would make more sense to the users if the default options in the filter logically and visually matched with the default displayed values.
Reference material:
Grid column contents: https://www.telerik.com/blazor-ui/documentation/components/grid/columns/display-format
Checkbox List: https://www.telerik.com/blazor-ui/documentation/components/grid/filter/checkboxlist
Alternate FilterDescriptor shapes not supported: https://feedback.telerik.com/blazor/1681745-clear-button-in-grid-filtermenu-not-properly-clearing-custom-filter
Example Repl: https://blazorrepl.telerik.com/mJOSuxQw117zM1h321
Hi there,
I have a TelerikGrid with a DateTime column. I use a custom FilterEditorFormat which is localizable depending on the user settings, e.g. "dd/MM/yyy HH:mm:ss". Unfortunately, any '/' in the date component is always replaced by the current culture's DateSeparator. Using any other separator works, e.g. '-'.
Expectation: Use the FilterEditorFormat without modification, unless it's a standard format string like "g" or "D".
I already traced it down to Telerik's FormatHelper class and it seems like a quick fix.
Steps to reproduce:
- Create a TelerikGrid with a DateTime column and a FilterEditorFormat as shown above.
- If required, change the DateSeparator to anything else but '/'.
- Run and open the filter dialog
Please let me know if you need any additional information.
Best regards
Andreas
can you provide a initial File click event handler attribute?
I want the user to be able to click on an initial file to download the file.
Hello,
related to my previous bug report.
When Add / Edit is clicked in the Grid, it causes a Dialog to open.
The dialog has a Form, and if the model for that form is set through OnParametersSet, the method is called in an infinite loop, and the Dialog never gets shown.
(https://docs.telerik.com/devtools/wpf/controls/radgridview/filtering/basic)
(https://docs.telerik.com/devtools/winui/controls/raddatagrid/filtering/datagrid-overview)
The problematic behavior can be reproduced in the following case:
- The DropDownList is at the lower part of the page, so the popup is rendered on top of the main element.
- The popup height is set to "auto".
In this scenario, when the user filters, the popup position remains unchanged but its height is reduced to fit the filter results. Thus, the popup looks detached from the main element. The behavior is not the same when the popup is rendered below the main element as in this case its top part sticks to the main element.
Reproduction: https://blazorrepl.telerik.com/mpEHGzOt25F1Znxi57.
===
ADMIN EDIT
===
As a workaround for the time being, you can ensure that the popup has a fixed height, so it does not collapse when there are less items to show. You may keep the default popup height or set your desired one through the settings tag. For example: https://blazorrepl.telerik.com/mpYdcfaN38JvIHgP41.
Creating a new WebApp project template through the extension fails to build. This is caused by incorrect icon type in the MainLayout.razor file.
To make sure the app is correctly built, the Icon type should be FontIcon.
<TelerikButton Icon="@FontIcon.Menu"
FillMode="@ThemeConstants.Button.FillMode.Clear"
OnClick="@( () => DrawerExpanded = !DrawerExpanded )" />
While working on how to connect the filters together, I noticed that the clear button can gets the later part of the CompositeFilterDescriptor stuck in the grid.
Reproducible example: https://blazorrepl.telerik.com/wzuRPRvB00Vlj1Ac28
With the current configuration of the repl, filtering using only the TelerikCheckBoxListFilter and clicking filter will filter the column as expected, and clicking clear will blank out the checklist but won't reset the grid's filtering from those checkboxes until after ticking a checkbox and clicking filter, then unticking all checkboxes and clicking filter again. If the checkbox gets used then the clear button gets clicked, clicking the filter button after using the TelerikFilter without any checkboxes checked will filter based on the checkboxes the grid remembers ANDed with the new values from the TelerikFilter, again until the checkbox gets used and then manually emptied without using the clear button.
If the order of _textFilterValueInternal and _checkFilterValueInternal in the FilterDescriptors list get reversed, then the grid's filter memory issue gets transferred to the TelerikFilter meaning the issue is presumably with the grid itself. Also, if you use one or more values in both filters, then the clear button works as intended if there weren't already filters stuck inside the grid.
The clear button works as expected if filtering with both the filter and the checklist before clearing the filter.
Example images:
Start:
Check some boxes:
Filtered:
Open filter menu and click "Clear":
Re-open the filter menu:
New filter:
Click "Filter":
Re-open filter menu:
Click "Clear" button again:
So the user would have something like: 'Cupcakes (12 count), Mozzarella Cheese - Kraft, ...'
So the autocomplete would filter the string to find the part after the last comma and use that to search, but when the user finds their item and selects it, it needs to append to the string (and add a comma) and not overwrite it. Then continue the cycle.
Attempting to use OnChange does not allow for this to happen. On selection of a dropdown item, it will overwrite the string entirely.
I noticed that when the ReadTimeout property of the FileSelect's FileInfoStream is read, the code seem to block completely.
You will find a Blazor Web App project attached to this ticket showcasing the issue.
Hello,
i am trying to add a Clear Button inside the DropDownList-Component.
I tried to follow the instructions provided here: How do I add a Clear button to a DropDownList? in UI for Blazor | Telerik Forums respectiveley here: Telerik REPL for Blazor - The best place to play, experiment, share & learn using Blazor.
But unfortunateley, the button is never inside the component. It's always next to it or under the component.
In your example provided above, the button is inside the component.
I would love to have any solution for this one. A clear button is needed quite often.
I also have attached our custom component, where we use the Telerik DropDownList Component.
Thank you
Hello,
after uprading fron 7.1.0 to version 8.0.0
on IOS v 16.2, or any version before 17, telerik ui stopped working with this error after navigating between pages:
Microsoft.JSInterop.JSException: Could not find 'TelerikBlazor.initMediaQuery' ('TelerikBlazor' was undefined).
even, when mediaquery is not present at the 2 pages between navigating occurs.(login->landing page)
what iam tried on NEW clean device(so no caching troubles):
- changing order of scripts in app.razor
- adding defer
- addin autostart=false + DOM event
https://www.telerik.com/blazor-ui/documentation/getting-started/what-you-need#javascript-file
- any kind of browsers(on ios everything is webkit-safari)
- independent test on external emulator ip12 ios 16.2
https://appetize.io/app/standalone_lahzvlutkzrno7sqs36cqlj5wy?device=iphone12&osVersion=16.2
attached examples are for comparing of descriped attemps to get it work - both failed. But on v7.1.0, works ok - both.
Is there any breaking changes, which must be modified to get it working?
Thanks
Telerik UI for Blazor requires unsafe-inline styles in order to render style attributes from the .NET runtime.
Please add support for strict CSS CSP without the need for unsafe inline styles.
===
TELERIK EDIT:
Due to the complexity and required effort to add strict CSS CSP support:
- The feature request must gather enough votes.
- We may implement it gradually. That's why, everyone who is interested, please specify the exact components and features that you need to be compliant sooner.
Dear all,
Please, Can you send the source code for this template with Arabic language https://demos.telerik.com/blazor-coffee/
Please add Arabic translate from right to left automatic when select Arabic language
Add support for DateOnly and TimeOnly properties to the ToODataString() method in the DataSourceExtensions namespace.
===
TELERIK NOTE
@Steven I forked this thread from the already complete feature request Provide support for DateOnly and TimeOnly structs for the respective pickers
Currently DateOnly and TimeOnly types are not supported by the ToODataString() method. As a result, they are serialized with the default ToString() method. Please use DateTime instead or implement a custom serialization method. Downloading our source code and using the built-in method as a base is also an option.
===
ORIGINAL POST
Would you have any updates regarding this support for early 2024?My main issue regarding this at the moment is:
- My Backend returns DTOs with DateOnly properties.
- I wish to use these properties in a grid
- So far... So good... We can see the items etc... But then...
- We want to filter these properties...
- When we get the OData query... Our DateOnly is not in the correct ISO format... As there's no support for those in DataSourceExtensions.cs
I already tried solving this by creating my own GridColumn type, but I'm afraid there's nothing I can do about the OData serialization without just writing our own DataSourceExtensions... At which point we're just making it confusing for other developers needing to include this...
public class DateOnlyGridColumn : GridColumn
{
private DateOnly? _filterValue;
public DateOnly? FilterValue
{
get => _filterValue;
set
{
if (_filterValue != value)
{
_filterValue = value;
StateHasChanged();
}
}
}
public DateOnlyGridColumn()
{
DisplayFormat = "{0:dd/M/yyyy}";
FilterMenuTemplate = FilterMenu;
FilterMenuButtonsTemplate = FilterButtons;
}
private RenderFragment<FilterMenuTemplateContext> FilterMenu => (context) => (builder) =>
{
builder.OpenComponent<TelerikDatePicker<DateOnly?>>(0);
builder.AddAttribute(0, "Value", FilterValue);
builder.AddAttribute(2, "ValueChanged", EventCallback.Factory.Create<DateOnly?>(this, (value) => FilterValue = value));
builder.CloseComponent();
};
private RenderFragment<FilterMenuTemplateContext> FilterButtons => (context) => (builder) =>
{
// Filter button
builder.OpenComponent<TelerikButton>(0);
builder.AddAttribute(1, "OnClick", EventCallback.Factory.Create<MouseEventArgs>(this, async () => await ApplyFilter(context)));
builder.AddAttribute(2, "ThemeColor", ThemeConstants.Button.ThemeColor.Primary);
builder.AddAttribute(3, "ChildContent", (RenderFragment)(childBuilder =>
childBuilder.AddContent(0, "Filter")));
builder.CloseComponent();
// Clear button
builder.OpenComponent<TelerikButton>(4);
builder.AddAttribute(5, "OnClick", EventCallback.Factory.Create<MouseEventArgs>(this, async () =>
{
FilterValue = null;
await context.ClearFilterAsync();
}));
builder.AddAttribute(6, "ChildContent", (RenderFragment)(childBuilder =>
childBuilder.AddContent(0, "Clear")));
builder.CloseComponent();
};
private async Task ApplyFilter(FilterMenuTemplateContext filterContext)
{
if (filterContext == null || string.IsNullOrEmpty(Field) || !FilterValue.HasValue)
return;
var filter = new FilterDescriptor
{
Member = Field,
MemberType = typeof(DateOnly),
Operator = FilterOperator.IsEqualTo,
Value = FilterValue.Value, //.ToString("o") Convert to ISO-8601 format
};
filterContext.FilterDescriptor.FilterDescriptors.Clear();
filterContext.FilterDescriptor.FilterDescriptors.Add(filter);
await filterContext.FilterAsync();
}
}
We need a formal, Accordion component. This is missing like a sore thumb !
The Accordion should be the first component in the component list.
Using the panel bar is not the same as the functionality of Accordion. So, do not mark this request as a duplicate of a panel bar enhancement request.
This is a simple component and I request you to prioritize and release it urgently in the next release.
Thanks.
This seems to be a regression in this version. I cannot find an open issue on it. I think it's the same as this issue.
Here is a REPL link with the issue recreated. The bug happens the second time you open the dialog. You can see on the first close of the dialog that the parent window z-index is increased by 2. Then the second time you open the dialog the z-index is less than it's "parent" component.
Please link me to the current issue if there is an open duplicate.
Kind regards,
Linda