https://docs.telerik.com/blazor-ui/components/grid/selection/multiple#two-way-binding-of-selecteditems

Click the Preview button to load the example. Notice that the 3rd, 4th, and 5th rows are programmatically selected in the OnInitialized() method. Now, if you hold down the Shift key and click on the 6th row, instead of having the 3rd through 6th rows selected, we get the 1st through 6th row selected.

By design, the Shift + Click shortcut starts the selection from the last clicked row. If no click has taken place, the selection always starts from the first row. How to customize this?

For reference in Angular: https://www.telerik.com/kendo-angular-ui-develop/components/grid/api/SelectionDirective/

I've made a simple blazor repl demo here: https://blazorrepl.telerik.com/mmlYatun39gTFEgO21

As you can see, TotalCount is 10, and the current PageSize is also 10. When these values match, the value in the "items per page" dropdown isn't present. Select any other value, and it will be present (for 5, 20, 40). Come back to 10, and again, the value disappears.

Hello,

Please consider a built-in way to add spacing (gaps, margins, etc.) between the segments of a Donut and Pie charts. The <ChartSeries> tag has such parameters, but they are used for other settings or other series types.

Currently, it is possible to achieve the desired appearance with custom CSS, but that requires knowledge about the Chart rendering.

Grid headers are misaligned if they are navigated in a scrolling scenario with a Frozen column.

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ADMIN EDIT

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The behavior affects the TreeList as well in a similar fashion. The misalignment is bigger when there is a frozen column but it is also reproducible without it in this demo.

There is a bug where DialogFactory is not resetting custom button text. In this example, if you click Show Prompt, the buttons are OK/CANCEL, then click Show Prompt with Title, Default Input Text and Custom Buttons, the buttons show READY/REJECT, clicking Show Prompt a second time will show the button text as READY/REJECT.

We find this in our infrastructure but it can be reproduced even in Telerik docs.

Docs page: https://docs.telerik.com/blazor-ui/components/grid/grouping/overview try to drop all three columns using drag and drop in sequence: Team, Name, On Vacation.

Expected sequence: Team, Name, On Vacation

Expected sequence: Team, On Vacation, Name

All Elements are always added as 1 item. It is an important feature for us, as our customers use it frequently.

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TELERIK EDIT:

A possible workaround is to intercept the grouping and reorder the groups:

@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; }
    }
}

When is Spreadsheet for Blazor available or can i use Kendo Spreadsheat?

Regards

Alois Seidler 

If I set a global font icon type, the Map icons are broken, because they are missing the k-font-icon CSS class. A possible workaround is to apply the missing styles to the rendered k-icon class:

In the meantime, one can use SVG icons or the following CSS rule as a workaround:

    .k-map .k-icon {
        width: 1em;
        height: 1em;
        outline: 0;
        font-size: 16px;
        font-family: "WebComponentsIcons";
        font-style: normal;
        font-variant: normal;
        font-weight: normal;
        line-height: 1;
        speak: none;
        text-transform: none;
        text-decoration: none;
        flex-shrink: 0;
        display: inline-flex;
        flex-flow: row nowrap;
        align-items: center;
        justify-content: center;
        vertical-align: middle;
        position: relative;
        -moz-osx-font-smoothing: grayscale;
        -webkit-font-smoothing: antialiased;
    }

The null type of operator can cause errors on the backend

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

Hi,

I have found a bug with the TelerikNumericTextBox in that it doesn't function correctly with nullable types (at least it doesn't with Nullable<int>). I have confirmed this is the case for both 2.28 and 2.29 versions of Kendo for Blazor.

Description of the issue:

If "TelerikNumericTextBox" is "@bind-Value" to a nullable int, the control exhibits some unusual behaviour. If you manually type 0 into the control, it is accepted and the value updates the view-model property. However, if you use either the down-arrow button or arrow keys to select 0 (on a fresh load so there is no existing value selected/set), it does not set/update the view-model property. However, it does work correctly if you select another value first (such as 1) and then select 0.

Unfortunately, this is confusing the end-users of my application and I believe it is a bug (I haven't noticed this when using the Kendo for Angular or Kendo for JQuery).

In my application, I need users to be able to set the value of 0 but we do not want to set an initial value for the NumericTextBox to be 0 as this could lead our customers on; the application in question is requiring the end-user to manually select the number rather than allowing them to just leave it as default. Therefore, the view-model property I am binding to has been put as "int?" so that the default value is null and validation will require the user to select a valid value if they just try and press save without making any changes. Please note, for our use case, the number 0 is a valid option!

Steps to reproduce the issue:

Use the following razor HTML

The new value is: @TheValue

<TelerikNumericTextBox Format="D" Max="10" Min="0" Step="1" @bind-Value="@TheValue"></TelerikNumericTextBox>

@code {
    public int? TheValue { get; set; }
}

Click into the control and either press "down" on the keyboard arrow keys or press the "down" icon next to the control, so the value is set to be 0. The number 0 will not be set/persisted to the view-model property even though the control shows a 0 value.

If you have multiple controls on the page, following the above steps will mean that as soon as you click into another control, 0 is deleted (I believe because the VM prop has not been set), this does not happen if you type 0 into the control.

HOWEVER

If you continue to use the same Razor code above and any of the following workflows, it will set the controls view-model property correctly:

• Type 0 into the control - value is set correctly and property on the view-model is updated
• Select "up" on the keyboard (so the value is 1) and then press down (so the value is 0) - 0 is set correctly and property on the view-model is updated
• Select "up" on the numeric textbox's up arrow button (so the value 1) and then press "down" on the down arrow button (so the new value is 0) - 0 is set correctly and property on the view-model is updated

Additional notes:

• I have noticed this only seems to apply to the nullable version of the int type, if the prop is just an int, the control works fine but is automatically defaulted to 0 (which is not appropriate for my use case)
• It seems that as soon as the control/view model property has an initial value, the control behaves normally and the issue no longer happens anymore (both with keyboard navigation and the control's up/down buttons).
• I have not tested with any other types/primitives, just on INT so far
• I have confirmed this happens if you have the control in an "<EditForm/>" or outside of an EditForm. 

I have attached a sample project where I have replicated the issue, it is just a simple NET5 WASM Blazor project (generated from the default template) and I have just added the latest Kendo for Blazor. Nothing else has been done except for demoing on the "index.razor" both binding approaches I have tried/been able to replicate this issue on.

I hope the above makes sense, let me know if you need any further clarification.

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

The event would fire when the map zoom level has changed.

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ADMIN EDIT: The new zoom level should be accessible in the event handler.