Grid popup editing throws about parameterless constructor even when I use the OnModelInit event.

The inline and incell edit modes are still working.

The regression occurs in version 4.2.0.

Please allow the Grid to support in cell editing only via double click. This will give the possibility to preserve single clicks for selection.

Right now, virtual scrolling can show two loading signs - the large spinner for the entire grid, and the placeholder on each row. It should not show the large spinner with virtualization.

In a Grid with multiple columns and InCell editing, rapid tab (quick tab key presses) eventually "jumps" the focus out of the Grid, leaves behind a cell open for editing and instead focuses another UI element on the page.

Hi

is there a way to make the Filtering in a grid work with wildcard symbols like '%' or '*' ?

I have checked the page https://docs.telerik.com/blazor-ui/common-features/filter-operators

For strings none of the possible operators seems to support wildcard symbols, they all treat it the symbol "as is" leading to no results. 

Guessing that the filtering is using Linq and Expressions so it would be nice if the FilterDescriptor constructor could accept a predicate function as parameter how the FilterValue is to be evaluated. I can see in the API reference that there is a protected method:

CreateFilterExpression(ParameterExpression parameterExpression)
but that is not usable / accessible when programmatically working with FilterDescriptor instances. 

Do you have plans for allowing wildcards in filter or offering new FilterOperators like "Regex" ? Or plans where a client could implement their own custom FilterOperators? 

Thanks

Frank

Selection performance suffers if the Grid has a large page size and uses child components in column templates:

https://blazorrepl.telerik.com/QHaLcVbl25YrVZU821

This is because the Grid doesn't apply performance optimizations for templates and always re-renders them.

Please expose a setting to disable re-rendering if it's not necessary.

Would like a parameter in the grid definition that would display a Clear/Refresh button to return the grid to all originally selected records.  This feature would work similar to the Excel clear filter function.  

The need is to update, add or delete a lot of items at once (for example, the selected items). Sample of batch editing: https://demos.telerik.com/kendo-ui/grid/editing.

Perhaps this may become possible through methods on the grid that invoke the CUD operations.

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ADMIN EDIT

There is a sample project that accomplishes most of these goals: https://github.com/telerik/blazor-ui/tree/master/grid/batch-editing

The grid state offers a great deal of flexibility in terms of controlling the grid, up to putting it in edit/insert mode.

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I added a comment to this feedback post.  In this post, I made a comment on how to get Tab select working in a grid component for a combobox.

It would be nice if tab select was a parameter for any dropdown component and autocomplete. Maybe a parameter called "TabSelect"? It would need to fire before the grid component picks up the Tab key first in InCellEdit mode. 

 

If that was changed above, then the grid component could have the following:

Enter key to move down the list, and Shift-Enter keys to move up the list. Is there a way to do that currently, or could it be added?

When I define a bigger number of MultiColumn Header the rendering performance of the Grid component quickly deteriorates. 

I would like an improvement in this regard.

Is there a way to hide the header?  I'm trying to use the Grid as a ListBox and it almost works using an empty span for the <HeaderTemplate>

Greetings!

I've been waiting for a few months now to swap to blazor, but one of the things that's currently holding us back is that the filter row can't be used together with the column menu.
I've always found this to be strange, since it's supported in the Angular and MVC versions, which we currently use.
Our users never filter via the column menu, always via the filter row. They hide/lock their columns via the column menu and sometimes sort.
This functionality is thus critical for us.

I can't find any feature request for it, nor any planned roadmap item.
Will this ever be supported because if not, we're gonna have to start looking for alternatives.

Kind regards.

Currently, I have no control over the Filter/Clear actions in the FilterMenu. It will be nice to be able to control them.

With a pageable grid after scrolling down the first page and then paging, the next page should be scrolled to the top - but it is not.

Is there a way to scroll up by code until this is fixed ???

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ADMIN EDIT

A sample solution is attached to the end of this post that shows how you can achieve this.

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The OnCellRender event is executed more times than expected.

Using CheckBoxList filtering changes the filter menu for all columns. I would like to specify CheckBoxList only for certain columns, but that doesn't currently appear to be an easy option.

1) Leave as FilterMenuType "Menu" but implement a custom filter template for the columns I want. That would be the most obvious, but CheckBoxList is not a usable control on its own?

2) Or do the inverse, use FilterMenuType "CheckBoxList" and implement a custom filter template for all the columns where I don't want to use that. Seems like a lot of extra work to manually recreate default filters.

3) I guess I roll my own clone of the CheckBoxList control and use that like #1 on individual columns?

Any chance the CheckBoxList control could be publicly exposed for direct use?

I'm trying to use the FilterMenu with the CheckBoxListFilter, and it seems like it's sooo close to what I want, if it only had an option for FieldText and FeildValue or something like that. Any way I can get this working to use the ID field as the value and the Name as the text? The highlighted section below is what I would envision it working perfectly as.

<GridColumn Field="@nameof(WorkActivity.WorkGroupId)" Title="Work Group" Width="135px">
            <FilterMenuTemplate Context="context">
                <TelerikCheckBoxListFilter Data="@WorkGroups"
                                           Field="@(nameof(WorkGroup.Name))" FieldValue="@(nameof(WorkGroup.Id))" 
                                           @bind-FilterDescriptor="@context.FilterDescriptor">
                </TelerikCheckBoxListFilter>
            </FilterMenuTemplate>

Similar to the WPF grid I would like the option to require the user hold shift to sort by multiple columns, otherwise the grid would sort by only a single column.

https://docs.telerik.com/devtools/wpf/controls/radgridview/sorting/multiple-column-sorting

Enhance the group header template context by including additional properties such as the parent group field and value.

When you scroll to the right in a grid and filter so that there are no items, the horizontal scroll disappears and you can no longer come back to the filter in order to clear it and work with the grid again.