In Development
Last Updated: 27 Jan 2021 15:17 by ADMIN
Scheduled for 2.22.0
The Set button should not be enabled when you change the month from the button in the popup, until the user selects a date too. 
Duplicated
Last Updated: 27 Jan 2021 10:27 by ADMIN

If a new item for a grid is created and the CreateHandler is cancelled due to some validation error, the new loading indicator does not disappear.

protected async void CreateHandler(GridCommandEventArgs args)
{

  var myItem = (MyModel) args.Item;

   if (!IsValid(myItem))
   {
       args.IsCancelled = true;
       return;
    }

   ...

}

Regards,

René

Completed
Last Updated: 27 Jan 2021 07:40 by ADMIN
Release 2.21.1

If you set args.IsCancelled=true in any CUD event handler, the loading sign will never go away.

---

ADMIN EDIT

If you don't need to cancel the event (e.g., because remote validation or data operation failed), you should avoid cancelling it - its purpose is to keep the grid in the current mode (edit/insert) when the operation fails so the user does not lose data.

That said, the loading sing should disappear in thsoe cases too, and a workaround is to disable it by setting the EnableLoaderContainer="false" parameter of the grid.

---

Unplanned
Last Updated: 26 Jan 2021 15:04 by ADMIN

I am getting the following error with them *only* when loading my site on an iPhone, after the page had been previously loaded on a PC.

2020-11-02T16:19:51.547Z] Error: Microsoft.JSInterop.JSException: An exception occurred executing JS interop: The JSON value could not be converted to System.Double. Path: $ | LineNumber: 0 | BytePositionInLine: 4.. See InnerException for more details.
 ---> System.Text.Json.JsonException: The JSON value could not be converted to System.Double. Path: $ | LineNumber: 0 | BytePositionInLine: 4.
 ---> System.InvalidOperationException: Cannot get the value of a token type 'Null' as a number.
   at System.Text.Json.Utf8JsonReader.TryGetDouble(Double& value)
   at System.Text.Json.Utf8JsonReader.GetDouble()
   at System.Text.Json.Serialization.Converters.JsonConverterDouble.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.JsonPropertyInfoNotNullable`4.OnRead(ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.JsonSerializer.HandleNull(Utf8JsonReader& reader, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore(JsonSerializerOptions options, Utf8JsonReader& reader, ReadStack& readStack)
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& readStack, Utf8JsonReader& reader, Exception ex)
   at System.Text.Json.JsonSerializer.ReadCore(JsonSerializerOptions options, Utf8JsonReader& reader, ReadStack& readStack)
   at System.Text.Json.JsonSerializer.ReadValueCore(JsonSerializerOptions options, Utf8JsonReader& reader, ReadStack& readStack)
   at System.Text.Json.JsonSerializer.ReadValueCore(Utf8JsonReader& reader, Type returnType, JsonSerializerOptions options)
   at System.Text.Json.JsonSerializer.Deserialize(Utf8JsonReader& reader, Type returnType, JsonSerializerOptions options)
   at Microsoft.JSInterop.JSRuntime.EndInvokeJS(Int64 taskId, Boolean succeeded, Utf8JsonReader& jsonReader)
   --- End of inner exception stack trace ---
   at Microsoft.JSInterop.JSRuntime.InvokeWithDefaultCancellation[T](String identifier, Object[] args)
   at Telerik.Blazor.Components.TelerikTooltip.OnAfterRenderAsync(Boolean firstRender)

Completed
Last Updated: 26 Jan 2021 08:46 by ADMIN
Release 2.21.1

Using the keyboard to save items works inconsistently. When editing an item, hitting enter seems to save the change as expected. When inserting an item, however, the item is lost.

---

ADMIN EDIT

Tthe grid calls the OnUpdate handler again, not OnCreate which results in data loss - the newly inserted item is unlikely to match existing data and so it appears to be lost.

Workaround - call the OnCreate handler yourself when the ID of the record is the default for its type - for example, zero for an integer. This indicates a newly inserted record in the grid.

<TelerikGrid Data=@MyData EditMode="@GridEditMode.Inline" Pageable="true" Height="500px" Navigable="true"
             OnUpdate="@UpdateHandler" OnDelete="@DeleteHandler" OnCreate="@CreateHandler" OnCancel="@CancelHandler">
    <GridToolBar>
        <GridCommandButton Command="Add" Icon="add">Add Employee</GridCommandButton>
    </GridToolBar>
    <GridColumns>
        <GridColumn Field=@nameof(SampleData.ID) Title="ID" Editable="false" />
        <GridColumn Field=@nameof(SampleData.Name) Title="Name" />
        <GridCommandColumn>
            <GridCommandButton Command="Save" Icon="save" ShowInEdit="true">Update</GridCommandButton>
            <GridCommandButton Command="Edit" Icon="edit">Edit</GridCommandButton>
            <GridCommandButton Command="Delete" Icon="delete">Delete</GridCommandButton>
            <GridCommandButton Command="Cancel" Icon="cancel" ShowInEdit="true">Cancel</GridCommandButton>
        </GridCommandColumn>
    </GridColumns>
</TelerikGrid>

@code {
        async Task UpdateHandler(GridCommandEventArgs args)
        {
            SampleData item = (SampleData)args.Item;

            if (item.ID == 0)
            {
                await CreateHandler(args);
            }
            else
            {
                // perform actual data source operations here through your service
                await MyService.Update(item);

                // update the local view-model data with the service data
                await GetGridData();

                Console.WriteLine("Update event is fired.");
            }
        }

        async Task DeleteHandler(GridCommandEventArgs args)
        {
            SampleData item = (SampleData)args.Item;

            // perform actual data source operation here through your service
            await MyService.Delete(item);

            // update the local view-model data with the service data
            await GetGridData();

            Console.WriteLine("Delete event is fired.");
        }

        async Task CreateHandler(GridCommandEventArgs args)
        {
            SampleData item = (SampleData)args.Item;

            // perform actual data source operation here through your service
            await MyService.Create(item);

            // update the local view-model data with the service data
            await GetGridData();

            Console.WriteLine("Create event is fired.");
        }

        async Task CancelHandler(GridCommandEventArgs args)
        {
            SampleData item = (SampleData)args.Item;

            // if necessary, perform actual data source operation here through your service

            Console.WriteLine("Cancel event is fired.");
        }


    // in a real case, keep the models in dedicated locations, this is just an easy to copy and see example
    public class SampleData
    {
        public int ID { get; set; }
        public string Name { get; set; }
    }

    public List<SampleData> MyData { get; set; }

    async Task GetGridData()
    {
        MyData = await MyService.Read();
    }

    protected override async Task OnInitializedAsync()
    {
        await GetGridData();
    }

    // the following static class mimics an actual data service that handles the actual data source
    // replace it with your actual service through the DI, this only mimics how the API can look like and works for this standalone page
    public static class MyService
    {
        private static List<SampleData> _data { get; set; } = new List<SampleData>();

        public static async Task Create(SampleData itemToInsert)
        {
            itemToInsert.ID = _data.Count + 1;
            _data.Insert(0, itemToInsert);
        }

        public static async Task<List<SampleData>> Read()
        {
            if (_data.Count < 1)
            {
                for (int i = 1; i < 50; i++)
                {
                    _data.Add(new SampleData()
                    {
                        ID = i,
                        Name = "Name " + i.ToString()
                    });
                }
            }

            return await Task.FromResult(_data);
        }

        public static async Task Update(SampleData itemToUpdate)
        {
            var index = _data.FindIndex(i => i.ID == itemToUpdate.ID);
            if (index != -1)
            {
                _data[index] = itemToUpdate;
            }
        }

        public static async Task Delete(SampleData itemToDelete)
        {
            _data.Remove(itemToDelete);
        }
    }
}

---

 

Planned
Last Updated: 22 Jan 2021 20:49 by ADMIN
Scheduled for 2.21.1
Created by: Ivan
Comments: 4
Category: ContextMenu
Type: Bug Report
1
I am using the context menu to open a modal window. When I click on the menu item the component throws an exception. 
Completed
Last Updated: 22 Jan 2021 16:02 by ADMIN
Release 2.21.1

Our Site supports multiple themes that we have built using the SASS Theme Builder. For all Telerik Components we have used so far the theme changes on them as expected when using the example found here (Change Theme at Runtime). The problem seems to be the chart component will not adhere to the newly applied theme after its initial load. Seems like this is because it is shown as an SVG with hardcoded attributes on the element. Is there a workaround for this (other than reloading the components entirely)?

 

Before & After Theme Change:

Completed
Last Updated: 22 Jan 2021 15:53 by ADMIN
Release 2.21.1
1. Replace MainLayout with TelerikDrawer https://github.com/telerik/blazor-ui/tree/master/drawer/template
2. Place simple Grid with detail template https://docs.telerik.com/blazor-ui/components/grid/hierarchy
3. Bug - Latest column from parent grid becomes disabled for sorting.

<TelerikGrid Data="salesTeamMembers" @ref="Grid" Sortable="true" FilterMode=@GridFilterMode.FilterMenu Height="780px">
    <DetailTemplate>
           <span>Any template</span>
        </DetailTemplate>
    <GridColumns>
        <GridColumn Field="Id"></GridColumn>
        <GridColumn Field="Name" ></GridColumn>
        <GridColumn Field="Order"></GridColumn>
    </GridColumns>
</TelerikGrid>

If remove detail tempate, all columns becomes availavle for sorting as expected
Completed
Last Updated: 22 Jan 2021 13:57 by ADMIN
Release 2.21.1

If the "Navigable" parameter of the Grid is set to false (its default state) and the EditMode is PopUp, there is no focus on the first input in Add/Edit mode.

Declined
Last Updated: 21 Jan 2021 17:56 by René
Created by: René
Comments: 4
Category: Grid
Type: Bug Report
1

If in a grid columns are bound to integer values which shall be treated as enum values it can be done with the FieldType parameter.

Unfortunately the new FilterMenuType.CheckBoxList does not work as expected then.

With

<GridColumn Field="@(nameof(MyModel.MyPropertyId))"
                     FieldType="@(typeof(MyPropertyEnum))"
                     Title="MyProperty"
                     FilterMenuType="@FilterMenuType.CheckBoxList">

the filter shows Integers instead of Enum-Strings.

(With FilterMenuType.Menu the filter correctly treats the values as enums)

Regards,

René

In Development
Last Updated: 21 Jan 2021 15:14 by ADMIN
Scheduled for 2.22.0

The orderby clause only has one column when multicolumn sorting is enabled, you can test it with this sample.

---

ADMIN EDIT

A workaround is to replace the orderby generated by the grid with your own clause that uses the DataSourceRequest to extract all sort descriptors, here's an example:

@using System.Net.Http.Json
@using System.Text.RegularExpressions
@using Telerik.Blazor.Extensions
@using WasmApp.Shared
@inject HttpClient Http

<TelerikGrid Data=@GridData
             Height="460px"
             RowHeight="60"
             PageSize="10"
             Pageable="true"
             Sortable="true"
             FilterMode="@GridFilterMode.FilterRow"
             SortMode="@SortMode.Multiple"
             OnRead=@ReadItems
             TotalCount=@Total>
    <GridColumns>
        <GridColumn Field="ProductID" />
        <GridColumn Field="ProductName" />
        <GridColumn Field="Discontinued" />
    </GridColumns>
</TelerikGrid>

@code{
    public List<ODataProduct> GridData { get; set; } = new List<ODataProduct>();
    public int Total { get; set; } = 0;

    protected async Task ReadItems(GridReadEventArgs args)
    {
        var baseUrl = "https://demos.telerik.com/kendo-ui/service-v4/odata/Products?";

        string OdataUrl = args.Request.ToODataString();

        // replace the original orederby clause with one that contains all the order rules
        Regex x = new Regex("(orderby=)(.*?)(&)", RegexOptions.IgnoreCase);
        string actualOrderByClause = "orderby=";

        for (int i = 0; i < args.Request.Sorts.Count; i++)
        {
            if (i > 0)
            {
                actualOrderByClause += ",";
            }
            string order = args.Request.Sorts[i].SortDirection == Telerik.DataSource.ListSortDirection.Ascending ? "" : "%20desc";
            actualOrderByClause += $"{args.Request.Sorts[i].Member}{order}";
        }

        actualOrderByClause += "&";

        string OdataQueryWithMultipleOrder = x.Replace(OdataUrl, actualOrderByClause);

        //do the request as usual
        var requestUrl = $"{baseUrl}{OdataQueryWithMultipleOrder}";

        ODataResponseOrders response = await Http.GetFromJsonAsync<ODataResponseOrders>(requestUrl);

        GridData = response.Products;
        Total = response.Total;
    }
}

---

Declined
Last Updated: 20 Jan 2021 10:12 by ADMIN
Created by: Andrew
Comments: 1
Category: Tooltip
Type: Bug Report
0

Hover the mouse several times in a row at element c on the demo stand. OS Windows 10, Browsers: Chrome Version 87.0.4280.141 (Official Build) (64-bit) + Firefox Developer 85.0b9 (64-bit).

Tell me why the component periodically has 2 tooltips? This anomaly is also observed on your demo stand.

Completed
Last Updated: 19 Jan 2021 10:14 by ADMIN
Release 2.21.0
Created by: Justin
Comments: 0
Category: Menu
Type: Bug Report
1
The menu gets the focus off other components such as TextBox and NumericTextBox on every keystroke in the input area. 
In Development
Last Updated: 18 Jan 2021 14:44 by ADMIN
I am using a Grid with InCell editing mode and I have a boolean column when I click on that column the editor opens, but when I click somewhere else (non-editable cell) the edit mode is not closed. For columns of other types (string, numeric, etc.) it closes.
In Development
Last Updated: 18 Jan 2021 08:57 by ADMIN
Scheduled for 2.22.0

---

ADMIN EDIT

Here is a workaround - using a bit of JS to clear the checked state of the checkbox element when you clear the SelectedItems collection:

@inject IJSRuntime _js

@*You should move this to a proper place for scripts,
 suppressing the error like this is just a hack to keep this sample code concise*@
<script suppress-error="BL9992">
    function uncheckGrid(parentElem) {
        var checkboxes = parentElem.querySelectorAll(".k-checkbox.k-grid-checkbox");
        for (var i = 0; i < checkboxes.length; i++) {
            checkboxes[i].checked = false;
        }
    }
</script>

<div @ref="@ParentElem">
    <TelerikGrid Data=@GridData
                 SelectionMode="@GridSelectionMode.Multiple"
                 SelectedItemsChanged="@((IEnumerable<Employee> employeeList) => OnSelect(employeeList))"
                 SelectedItems="@SelectedEmployees"
                 Pageable="true"
                 Height="400px">
        <GridColumns>
            <GridCheckboxColumn />
            <GridColumn Field=@nameof(Employee.Name) />
            <GridColumn Field=@nameof(Employee.Team) Title="Team" />
        </GridColumns>
    </TelerikGrid>
</div>
@if (SelectedEmployees != null)
{
    <ul>
        @foreach (Employee employee in SelectedEmployees)
        {
            <li>
                @employee.Name
            </li>
        }
    </ul>
}

@code {
    ElementReference ParentElem { get; set; }


    public List<Employee> GridData { get; set; }
    public IEnumerable<Employee> SelectedEmployees { get; set; } = Enumerable.Empty<Employee>();

    protected override void OnInitialized()
    {
        GridData = new List<Employee>();
        for (int i = 0; i < 15; i++)
        {
            GridData.Add(new Employee()
            {
                EmployeeId = i,
                Name = "Employee " + i.ToString(),
                Team = "Team " + i % 3
            });
        }
    }

    protected void OnSelect(IEnumerable<Employee> employees)
    {
        bool flag = true;
        foreach (Employee item in employees)
        {
            if(item.EmployeeId % 3 == 0)
            {
                flag = false;
            }
        }
        if (flag)
        {
            SelectedEmployees = employees;
        }
        else
        {
            SelectedEmployees = Enumerable.Empty<Employee>();
            _js.InvokeVoidAsync("uncheckGrid", ParentElem);
        }
    }

    public class Employee
    {
        public int EmployeeId { get; set; }
        public string Name { get; set; }
        public string Team { get; set; }
    }
}

---

Won't Fix
Last Updated: 15 Jan 2021 17:33 by ADMIN
Scheduled for 2.22.0
Created by: Rayko
Comments: 2
Category: Grid
Type: Bug Report
4

Hi Telerik team,

 

In a Blazor Grid with filters enabled the event "OnStateChanged" is fired twice when I use a filter (set, change, remove).

---

ADMIN EDIT

This behavior is expected - when the grid is filtered, there are two actions that happen:

  1. the Page is reset so that you are sure to see data if it is available (there is no guarantee that there will be enough data to show up on the current page, filtering usually reduces the number of items the grid has)
  2. the Filter is applied

This is not something we intend to change at this point.

---

To reproduce this I took one of the provided examples and added the event handler:


@page "/"

<TelerikGrid Data=@GridData
             SelectionMode="GridSelectionMode.Multiple"
             SelectedItemsChanged="@((IEnumerable<Employee> employeeList) => OnSelect(employeeList))"
             SelectedItems="@PersistedSelectedItems"
             @bind-Page="@CurrentPage"
             PageSize="@PageSize"
             Pageable="true"
             FilterMode="GridFilterMode.FilterRow"
             OnStateChanged="@((GridStateEventArgs<Employee> args) => OnStateChangedHandler(args))">
    <GridColumns>
        <GridCheckboxColumn />
        <GridColumn Field=@nameof(Employee.EmployeeId) />
        <GridColumn Field=@nameof(Employee.Name) />
        <GridColumn Field=@nameof(Employee.Team) />
    </GridColumns>
</TelerikGrid>

@if (PersistedSelectedItems != null)
{
    <ul>
        @foreach (Employee employee in PersistedSelectedItems.OrderBy(e => e.EmployeeId))
        {
            <li>
                @employee.EmployeeId
            </li>
        }
    </ul>
}

@code {
    public List<Employee> PersistedSelectedItems { get; set; } = new List<Employee>();
    int CurrentPage { get; set; }
    int PageSize { get; set; } = 5;

    private async void OnStateChangedHandler(GridStateEventArgs<Employee> args)
    {
        await Task.Delay(5000);
    }

    protected void OnSelect(IEnumerable<Employee> employees)
    {
        IEnumerable<Employee> CurrentPageEmployees = GridData.Skip(PageSize * (CurrentPage - 1)).Take(PageSize);

        if (employees == null || employees.Count() == 0)
        {
            //the user de-selected all items with the header checkbox
            PersistedSelectedItems = PersistedSelectedItems.Except(CurrentPageEmployees).ToList();
        }
        else
        {
            //handle any deselected items
            var UnselectedEmployees = CurrentPageEmployees.Except(employees);
            PersistedSelectedItems = PersistedSelectedItems.Except(UnselectedEmployees).ToList();

            //add any new items if they were not selected already
            foreach (var item in employees)
            {
                if (!PersistedSelectedItems.Contains(item))
                {
                    PersistedSelectedItems.Add(item);
                }
            }
        }
    }

    //data binding and sample data
    public List<Employee> GridData { get; set; }

    protected override void OnInitialized()
    {
        GridData = new List<Employee>();
        for (int i = 0; i < 15; i++)
        {
            GridData.Add(new Employee()
            {
                EmployeeId = i,
                Name = "Employee " + i.ToString(),
                Team = "Team " + i % 3
            });
        }
    }

    public class Employee
    {
        public int EmployeeId { get; set; }
        public string Name { get; set; }
        public string Team { get; set; }
    }
}

Best regards,

Rayko

Unplanned
Last Updated: 13 Jan 2021 21:21 by ADMIN

Use any demo and rapidly hover between parent menu items:

Completed
Last Updated: 13 Jan 2021 21:12 by Mallika
Release 2.17.0
Created by: Vic
Comments: 1
Category: Scheduler
Type: Bug Report
1
When the view modes options (Month, day, week, etc...) is collapsed and the arrow is clicked, the drop menu shows behind the main scheduler window.
Unplanned
Last Updated: 12 Jan 2021 06:48 by ADMIN
Created by: Jason
Comments: 0
Category: Tooltip
Type: Bug Report
1

I need to make a tooltip more accessible.

---

ADMIN EDIT

The first thing you can do is use the aria-describedby on the tooltip targets and use its value in the tooltip Id parameter to help screen readers. It is up to the screen reader to detect the change in the DOM and read out the new content.

This item is to add attributes to the tooltip such as role="tooltip", aria-live="polite", role="presentation", aria-hidden="false". The exact attributes will depend on more detailed research and may differ from what I have listed here.

---

Declined
Last Updated: 11 Jan 2021 17:42 by ADMIN
Created by: chandra
Comments: 2
Category: UI for Blazor
Type: Bug Report
0

Hi Team, 

 

We tried to use the TelerikLoader in Blazor WASM app, but the loader is not appearing on the page. We tried the basic example given in the Demo but did not work. 

We are using latest Telerik Version (2.20.0).

@if (IsLoading)
{
    <TelerikLoader />
}
else
{
    @Data
}

 

We have below references in index.html

 

<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <title>THOR.UI</title>
    <base href="/" />
    <link href="css/bootstrap/bootstrap.min.css" rel="stylesheet" />
    <link href="css/app.css" rel="stylesheet" />
    <link href="css/toggle.css" rel="stylesheet" />
    <link href="css/spinner.css" rel="stylesheet" />
    <script src="_content/Telerik.UI.for.Blazor/js/telerik-blazor.js"></script>
    <link href="https://fonts.googleapis.com/icon?family=Material+Icons"
          rel="stylesheet">
    <link id="theme" rel="stylesheet" href="./css/thor-light-theme-material.css" />
    <link href="_content/Blazored.Toast/blazored-toast.min.css" rel="stylesheet" />
    <script src="./site.js"></script>
    <script src="_content/BlazorInputFile/inputfile.js"></script>
    <script src="_content/BlazorPro.BlazorSize/blazorSize.min.js"></script>
    <script src="_content/Fluxor.Blazor.Web/scripts/index.js"></script>
    <script src="./scripts/download.js"></script>
</head>

I tried to follow this below article and add the reference as below and CDN also but it did not work.

<!DOCTYPE html>
<html>
<head>
    . . .
    <link href="/css/kendo-themes/default/dist/all.css" rel="stylesheet"/>
    <!-- Choose only one of the themes -->
    <!-- <link href="/css/kendo-themes/bootstrap/dist/all.css" rel="stylesheet" />
    <link href="/css/kendo-themes/material/dist/all.css" rel="stylesheet" /> -->
</head>

https://docs.telerik.com/blazor-ui/themes/overview?_ga=2.269201457.1913489120.1608593340-471458801.1594239147&_gac=1.246760112.1609172260.EAIaIQobChMI_f6ZxYnx7QIV-QOzAB0llwO7EAAYASAAEgK2pvD_BwE

 

Please let us know what changes we have to make this to work.

 

Thanks

Chandra Vanama

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