We use QueryableExtensions.ToDataSourceResultmethod to load some data in our component. And at some moment we need to cancel data loading. But ToDataSourceResult method doesn’t support CancellationToken. So we are forced to use a workaround and just ignore the task's result. But task is still executing and causing the performance hit…
It would be great if you implemented support for this feature!
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();
}
}
Hi,
I would like to have a Expand/Collapse All Grid Groups button in the Grid Header. I know this is possible to do so programmatically outside of the grid but my users want it inside the Grid.
Thanks,
Humayoon
When a user hits the ENTER key at the end of their typing and expects the full text to be submitted, they potentially have partial text being submitted (depending on how quickly ENTER is hit). We know the general accepted solution is to set the DebounceDelay to zero, but we are using two-way binding with state management that results in a very laggy/delayed experience while typing is this is done.
Please allow pressing Enter or blurring the input to short-circuit the debouncing.
===
ADMIN EDIT
===
This request applies to all inputs - NumericTextBox, TextBox, TextArea, etc.
Hello,
We are looking to port an angularjs web application to Blazor and I didn't see the diagram component similar to the one found in Kendo UI. It would be nice to see a viso-like component in UI for Blazor.
Thank you.
Please add group header template for the select components. There are two goals:
- Customize the group items' appearance.
- Implement custom behaviors, for example - batch select or unselect of all items in the group by clicking on the group header.
I'm looking for what you have in WPF as we migrate ourselves over to Blazor - https://www.telerik.com/products/wpf/conversational-ui.aspx
---
ADMIN EDIT
For the time being, you can consider using the Kendo Chat widget as described in this sample project.
---
Hi Telerik Support
This is related to the feedback portal item: The Grid header gets focus only for the first time when tabbing
I had raised the above issue, now I can see that the issue is fixed in 7.0.0. But the fix does not work when the TelerikGrid is inside a TelerikWindow.
Please find the REPL sample https://blazorrepl.telerik.com/QIvmPrlI39rZ4whP10
Is there a work around for the scenario where the grid is inside a popup window?
Regards
Bably
Hi,
Can I request that the Pdf Viewer:
- Load multiple pdf files on open. Maybe via an array of file names.
- We use a different viewer due to this capability. For Human Resource files you need the ability to load numerous files into one viewer to show a complete
document. The current one file option doesn't work for us.
- Display thumbnails of the loaded pages.
- Thumbnail onclick to move to a specific page.
Regards,
Graham O'Riley
Steps to reproduce:
- Insert a simple TelerikGrid on your page
- Add Columns with templates for each property
- Specify a Column Template
See https://blazorrepl.telerik.com/GyPvFMFr00zLEEdG00
Problem / Inconvenience
- Context has to be converted/cast before access to the each property is possible
- Grid columns are not generic which makes them hard to use sometimes
- Fields have to be specified by name (may lead to wrong names after changing)
Solution / Feature Request
- Provide new generic columns (to ensure no current implementations break)
- Add [CascadingTypeParameter(nameof(TItem))] to the TelerikGrid
- GridColumns automatically "inherit" the typeparam TItem
Idea from: Blazor QuickGrid
Benefits
- GridColumns can be specified with Expression
- Template context does not have to be cast anymore
- Renaming properties affect expression or an error is display (property does not exist)
<GridColumn For="@(t => t.Name)">
<Template>
<div>
@item.Name
</div>
</Template>
</GridColumn>
It stops working if you open it too fast. It goes into a state where no matter what you do (Rebind/changing data bound values etc.), it will not open and show items.
It can be reproduced easily by calling .Open() in OnInitializedAsync()
I have reproduced it without MS Playwright in REPL, so you can easily debug it.
https://blazorrepl.telerik.com/QIOUYoPc57iQKy6702
If you uncomment the await Task.Delay(3000); the code will work.
Expected behavior:
It is ok that Open() does nothing while the control is initializing. It is not ok that just because you called Open() once, then you are forever stuck without being able to open it later, no matter how long you wait or what you do with the items.
I do not want to insert random Delays in my code either as I expect the TelerikDropDownList to not malfunction just because I open it too early.
I hope you can prioritize this as right now the DropDownList is not usable for us.
I'd like to have an ExpansionPanel component where I can declare my desired panel instances and their content in the markup.
Similar to https://www.telerik.com/kendo-angular-ui/components/layout/expansionpanel/
I get validation issues for the selection Checkboxes and the PageSizes dropdown as they do not have id or name attributes:
The behavior can be reproduced in the online demo: Blazor Data Grid - Overview
Please expose the current data of the data bound select components when using OnRead. This will spare the need to cache data for the second time in-memory, or make a database request, or search by non-ID value when the app needs to obtain the full data item(s) for given component value(s).
This feature request is applicable to:
- AutoComplete
- ComboBox
- DropDownList
- MultiColumnComboBox
- MultiSelect
When I place a tooltip on drawer item, it just flickers randomly
![[video-to-gif output image]](https://im3.ezgif.com/tmp/ezgif-3-4372cd0f87.gif)
https://blazorrepl.telerik.com/wQbbmbGb05hzznPh45