When using the TelerikCheckBoxListFilter component in a FilterMenuTemplate, it does render a checkbox with a blank label, but selecting it does not generate a filter descriptor.

For reference, the built-in CheckBoxList filtering correctly filters null values.

I have a Grid with Navigable="true" and FilterRow. If I focus a string filter input and press the left/right arrow keys, the focus moves away from the cell. This behavior also occurs when I press up/down arrows in numeric filter inputs.

Reproduction: https://blazorrepl.telerik.com/GcvPkekt36Mxgygv07. 

I am using InCell Grid editing. I want to prevent an edit cell from closing on certain condition. However, when I cancel the update with args.IsCancelled = true in OnUpdate, the user can still close the edited cell with Enter or Tab. This is inconsistent with inline or popup editing.

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A possible workaround is to cancel both OnUpdate and the subsequent OnEdit.

https://blazorrepl.telerik.com/QykMHkks10APuDLQ47

@using System.ComponentModel.DataAnnotations

<TelerikGrid Data="@GridData"
             EditMode="@GridEditMode.Incell"
             OnEdit="@OnGridEdit"
             OnUpdate="@OnGridUpdate">
    <GridColumns>
        <GridColumn Field="@nameof(SampleModel.Name)" />
        <GridColumn Field="@nameof(SampleModel.Min)" />
        <GridColumn Field="@nameof(SampleModel.Max)" />
    </GridColumns>
</TelerikGrid>

<TelerikNotification @ref="@NotificationRef"
                     HorizontalPosition="@NotificationHorizontalPosition.Center"
                     VerticalPosition="@NotificationVerticalPosition.Top" />

@code {
    private TelerikNotification? NotificationRef { get; set; }

    private List<SampleModel> GridData { get; set; } = new();

    private bool ShouldCancelOnEdit { get; set; }

    private int LastId { get; set; }

    private void OnGridEdit(GridCommandEventArgs args)
    {
        if (ShouldCancelOnEdit)
        {
            ShouldCancelOnEdit = false;
            args.IsCancelled = true;
        }
    }

    private void OnGridUpdate(GridCommandEventArgs args)
    {
        var updatedItem = (SampleModel)args.Item;

        if (updatedItem.Min > updatedItem.Max)
        {
            NotificationRef?.Show(new NotificationModel()
            {
                ThemeColor = ThemeConstants.Notification.ThemeColor.Error,
                Text = "Min must be smaller than Max"
            });

            args.IsCancelled = true;
            ShouldCancelOnEdit = true;
        }
        else
        {
            var originalItemIndex = GridData.FindIndex(i => i.Id == updatedItem.Id);

            if (originalItemIndex != -1)
            {
                GridData[originalItemIndex] = updatedItem;
            }

            ShouldCancelOnEdit = false;
        }
    }

    protected override void OnInitialized()
    {
        for (int i = 1; i <= 5; i++)
        {
            GridData.Add(new SampleModel()
            {
                Id = ++LastId,
                Name = $"SampleModel {LastId}",
                Min = Random.Shared.Next(1, 10),
                Max = Random.Shared.Next(11, 20)
            });
        }
    }

    public class SampleModel
    {
        public int Id { get; set; }
        [Required]
        public string Name { get; set; } = string.Empty;
        public int Min { get; set; }
        public int Max { get; set; }
    }
}

The select-all functionality of the Grid is slow in WebAssembly apps, when SelectAllMode="GridSelectAllMode.All".

A possible workaround is to use a CheckBoxColumn HeaderTemplate.

Error:

Example:

private string SerializedState; private void OnStateInitHandler(GridStateEventArgs<SampleData> args) { args.GridState = JsonSerializer.Deserialize<GridState<SampleData>>(SerializedState); }

Reason:

FilterDescriptors property MemberType = null.

Note:

Method TelerikGrid.SetState() works correctly.

---

ADMIN EDIT

A sample reproducible is attached.

The issue stems from the inability of the System.Text.Json serializer to work with fields of type "Type" and the filter descriptors have such a field to denote the type of the column. Whether it will be possible for the grid to work around needs to be researched in more detail, because the limitation comes from the framework.

Might be the same problem as the following thread that also offers a few workarounds one can consider: https://feedback.telerik.com/blazor/1505237-set-deserialized-grid-state-in-onstateinit-handler-cause-error-on-open-filter-menu-of-column-on-ui

---

With OnRead, AllPages cannot be exported because the grid Data only has the current page: https://docs.telerik.com/blazor-ui/components/grid/export/excel#notes:

If you are using the OnRead event, only the current page of data will be exported, because that's all the grid has at the time of the export action.

I load my data via "OnRead", because i need to implement pagination by myself, and I would like the export option to work with that too.

Currently, when there is a blank or null value, no text is rendered next to the CheckBox in the CheckBoxList filter. I want to be able to customize that and easily set my desired text. For example, "(Blanks)" as in Excel.

Hi,

I have spent a while looking for the feature to move the Footer Template to the first line of the Telerik grid. Is this currently possible with a parameter I'm unaware of? How possible would this be to do if not. 

Kind Regards,

Elliot

ADMIN EDIT

Workarounds are:

- using a "real" model instead of a dynamic type

- removing the LoadGroupsOnDemand feature (and using the regular paging so you can still have grouping in case you were using virtual scrolling)

Please add the ability to expand or collapse all rows as a default feature of the Grid and add the option to set a title on the header (e.g. "Expand").

I've seen the Expand Rows From Code example, but I'd like this to be part of the grid itself, not a button outside of the grid.

I'm trying to add a button in the unused top left cell of the grid, but I've not found a way to use that cell.

We have a grid with a GridCheckboxColumn that we have configured through a '.unselectable-row' style so that certain elements cannot be selected (those elements with a padlock in the second column cannot be selected).

The grid works correctly in isolation, but when we add a TelerikLoaderContainer that is displayed during data loading process, the grid doesn't working properly: it is possible to select all the enabled elements of the grid using the button in the header of the checkbox column. However it is not possible to deselect them from the button in the header of the checkbox column when there is any unselectable element.

Here it is a link to REPL with a reproducible example: https://blazorrepl.telerik.com/GyYhYXPI24gIYgIJ03

To reproduce the problem, you sholud select all grid elements from the checkbox column header button and try to deselect them. You will not be able to deselect all the elements. 
Now comment the LoaderContainer component and repeat the test. You will see that now it is possible to deselect correctly all the elements.

How can we deselect all the elements from the header while keeping the loadercontainer?

The behavior is reproducible in server-side apps when using the Inline or Incell mode and editing numerical values.

When inputting into the field the first value input is either ignored or removed. The default is 0, when backspacing to clear it and then inputting a number, sometimes the number is shown and then immediately removed, and sometimes it's not shown at all and will only displayed when typed a second time.

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ADMIN EDIT

===

Possible workarounds for the time being:

• Use EditorTemplate with a NumericTextBox component inside: https://blazorrepl.telerik.com/cyvOYBvc39Vnes2L43.
• Use Popup Edit mode.

Currently the GridSearchBox is able to search in all of the visible columns but when it comes to searching in multiple columns split by space it does not work. Or even two different strings in the same cell.

Example:

If from the above grid, I type in the search box, "LT" three products will be returned but if I type "LT LD" it should return two products but the results set comes with nothing.

I have implemented CustomSearchBox component as a solution in the interim to achieve this functionality. But it would be a worthwhile effort to have this functionality out of the box.

Thank you.

Sheraz

I suggest adding a FieldExpression property to the GridColumn so a developer would not need to create view models and templates for simple transformations of the existing model's properties. The field expression would be used for filtering and sorting as well. Its type would be Func<T, object> or Expression<Func<T, object>>.

   <TelerikGrid Data="@Persons">
            <GridColumns>
                <GridColumn FieldExpression="@(p => p.FirstName + " " + p.LastName)" />
            </GridColumns>
        </TelerikGrid>