On grids with a lot of data there is a delay between when the grid is assigned the data to when the grid shows the data.  During this UI painting period, the NoDataTemplate is displayed for a second or two.

The grid should not show the NoDataTemplate unless the data source is loaded with an empty collection, not just while it is still trying to show the data.

Note: Having a generic message like in the documentation "No Data available / The data is still loading ..." is not satisfying our users. (Blazor Grid - No Data Template - Telerik UI for Blazor) These should really be two different states that can show different messages.

Thanks

The value of the FileName parameter is not updated properly in the OnBeforeExport event handler.

When the user drags a third column to the Grid Group Panel, it ends up being second, instead of last. It looks like each new column is inserted at index 1, instead of appended last (when this is the user's intent).

@using Telerik.DataSource

<p>Group by a third column, so that it should come last in the Group Panel:</p>

<TelerikGrid @ref="@GridRef"
             Data="@GridData"
             Pageable="true"
             Sortable="true"
             Groupable="true"
             FilterMode="GridFilterMode.FilterRow"
             OnStateInit="@( (GridStateEventArgs<Employee> args) => OnGridStateInit(args) )"
             OnStateChanged="@( (GridStateEventArgs<Employee> args) => OnGridStateChanged(args) )">
    <GridColumns>
        <GridColumn Field="@nameof(Employee.Name)" />
        <GridColumn Field="@nameof(Employee.Team)" />
        <GridColumn Field="@nameof(Employee.Salary)" />
        <GridColumn Field="@nameof(Employee.OnVacation)" />
    </GridColumns>
</TelerikGrid>

@code {
    private TelerikGrid<Employee>? GridRef { get; set; }

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

    private void OnGridStateInit(GridStateEventArgs<Employee> args)
    {
        args.GridState.GroupDescriptors = new List<GroupDescriptor>();

        args.GridState.GroupDescriptors.Add(new GroupDescriptor()
        {
            Member = nameof(Employee.Team),
            MemberType = typeof(string)
        });

        args.GridState.GroupDescriptors.Add(new GroupDescriptor()
        {
            Member = nameof(Employee.OnVacation),
            MemberType = typeof(bool)
        });
    }

    private async Task OnGridStateChanged(GridStateEventArgs<Employee> args)
    {
        if (args.PropertyName == "GroupDescriptors" && args.GridState.GroupDescriptors.Count > 2 && GridRef != null)
        {
            var secondGroupDescriptor = args.GridState.GroupDescriptors.ElementAt(1);

            args.GridState.GroupDescriptors.Remove(secondGroupDescriptor);
            args.GridState.GroupDescriptors.Add(secondGroupDescriptor);

            await GridRef.SetStateAsync(args.GridState);
        }
    }

    protected override void OnInitialized()
    {
        var rnd = new Random();

        for (int i = 1; i <= 20; i++)
        {
            GridData.Add(new Employee()
            {
                Id = i,
                Name = "Name " + i,
                Team = "Team " + (i % 4 + 1),
                Salary = (decimal)rnd.Next(1000, 3000),
                OnVacation = i % 3 == 0
            });
        }
    }

    public class Employee
    {
        public int Id { get; set; }
        public string Name { get; set; } = string.Empty;
        public string Team { get; set; } = string.Empty;
        public decimal Salary { get; set; }
        public bool OnVacation { get; set; }
    }
}

The null type of operator can cause errors on the backend

*** Thread created by admin on customer behalf ***

I would like to be able to edit both Date and Time in Grid editing mode.

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Telerik edit: Possible since version 3.1.0 with through the column EditorType parameter.

Hi Telerik team,

When I want to bind the Blazor Grid to an ExpandoObject I need to assign the FieldType. I know I have to use non-nullable types.

But I want to use nullable types (for example int?) to have a blank cell within the Grid when there is no value for it. With "typeof(int)" instead of "typeof(int?)" every empty cell shows "0" which I don't want.

Is there any chance to let FieldType accept nullable types?

Best regards,

Rayko

There is a change in the Grid behavior from version 4.6.0 to 5.0.0.

Consider the following REPL test page: https://blazorrepl.telerik.com/cSabmRPy306iPiXK18

Clicking on a Grid cell for editing will not open it for editing if there is already an open cell in edit mode on the same table row. The issue is reproduced more easily if the OnUpdate handler is empty or not defined at all.

This used to work in version 4.6.0.

When a user deletes a record that decreases the number of pages on that Grid, and then they try to edit or add a record, they get stuck in the OnCancel event handler, which gets called over and over in an endless loop.

The behavior can be seen:

• After deleting a record in the Grid, which decreases the number of pages.
• The Grid is using a confirmation dialog from the DialogFactory for the Cancel action.

Steps To Reproduce

https://blazorrepl.telerik.com/GokIvFva42BLx7yl37

1. Delete item 11. The Grid will move you to page 1.
2. Try to edit or add a new item. OnCancel will fire in a loop.
3. If OnAdd and OnEdit are not defined, the loop will occur in OnUpdate and OnCancel.

I want to compare special characters (such as umlauts) to other user input.

I have a TelerikGrid that contains many columns and a DetailTemplate within it. The Grid has functionality for multiselect with a checkbox column that appears as the first column on the grid. Is it possible to move this checkbox column in front of the detail template '+' dropdown row?

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ADMIN EDIT

===

A possible option for the time being is to create a custom expand column and manage its position as needed. See more details and an example here: How to Reorder, Lock or Resize the Hierarchy Expand/Collapse Column in Telerik Blazor Grid.

I have a TelerikGrid with Reordarable enabled inside of a TelerikWindow. Reordering of the column works fine only the drop clue is not showing. I think this is because the z-index is incorrect.

Missing drop clue:

z-index of drop clue is 10000:

z-index of window is 10002:

Please expose an option to configure the field delimiter for CSV export. I want to set semicolon as field delimiter instead of a comma.

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ADMIN EDIT

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Internally the Grid uses SpreadStreamProcessing library to perform the export. That said, a necessary prerequisite to implement the current enhancement is that SpreadStreamProcessing supports settings for changing the delimiter when exporting to CSV. You may vote for the item and follow it to get status email updates.

For the time being, you may customize the exported file to set the desired field separator as suggested in the Grid CSV export - change the comma field delimiter knowledge base article.

It seems that the issue appeared after upgrading to Telerik 5.0 from 4.6.

When using a Grid with a locked column and column virtualization enabled, focusing cell from that locked column breaks the layout on horizontal scrolling.

Hello,

Do you have any sample for custom group Header template.

e..g. To  calculate the value of the column based on the other fields.

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ADMIN EDIT

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Once aggregates for all fields are exposed, we will need to provide an option to align them with the corresponding columns. This can be achieved through a GroupHeaderColumnTemplate which is targeted in a separate request.

ADMIN EDIT: Please review this thread and add your comments so we can get the community feedback on this. We have attached to this opener post a small sample that shows how to achieve this with a few lines of code, and a short video of that behavior.

Hello Team;

The Grid Popup is a great feature, but my understanding is that the Popup form ONLY shows properties that are assigned as columns to the Grid.
If true, this poses some restrictions for us. Many times we might show ONLY small # of columns in Grid, however the form requires MORE properties during ADD or UPDATE.
Is it possible that we can use two ViewModels, one for the Grid columns with less properties and one with more properties for ADD & UPDATE?

Note: If this FR is considered, perhaps we can have separate ViewModel for Update and ADD, as sometimes, ADD might require more properties to be added than later be updated.

This feature will save a lot of time to build apps that have many tables and we have to create CRUD operations

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ADMIN EDIT

Attached to this post are a reproducible and a workaround - setting the state in OnAfterRenderAsync with a small delay, so the initial grid render happens, then it can re-render and take the filters into account.

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