Hello

I have just received some feedback from a client re. the DateInput -Blazor control whereby they are describing the default behaviour as "strange" - and on having a closer look I tend to agree / believe there to be bugs with this.

Please see video and below notes - let me know if there are any workarounds to these things.
I do see there is an existing bug report which may partially cover these issues (DatePicker loses focus when used as data editor in the Grid and the input date starts with 0 (telerik.com)) , however, it seems this is "unplanned" ?

QA Telerik DateInput:

• Try entering in M =  1 then 1 SLOW = works ok
  
  
• Try entering in M =  1 then 1 FAST = focus moves to the end of the date
  
  
• Try entering 0 in the month or day  = Whole date disappears 
  (Data loss - for in-cell edit mode this is a big deal)
  
  
• Try entering DD = 11 then its ok for 1st edit, but 2nd edit of the DD, 
  then the focus moves to the end????
  
  
• Try entering M = 1, D = 8, Y=2021 without using the mouse 
  (its not possible as 01 would move focus to end of date).... 
  and if you choose to type 01 and its not fast enough, the whole date will disappear on entry of 0

Entering a date without using the mouse to move focus is quite important for big data-entry in grids where you are tabbing or clicking over from field to field in large quantities.

Cheers
Phil

Wè would like to have the Fluent UI style available for Blazor. We are using the Telerik UI controls in a large project werd the UI has to be very similar to the one of Microsoft D365 Customer Service.

Regards, Henk

Can you add Debounce to the filtering?

---

ADMIN EDIT

At the moment, you can use the OnRead to implement custom filtering and also debounce the operations: https://docs.telerik.com/blazor-ui/components/combobox/events#onread and the particular example the article links is shown here: https://docs.telerik.com/blazor-ui/knowledge-base/combo-debounce-onread

You may also want to look at item virtualization in the dropdowns - Follow it here: https://feedback.telerik.com/blazor/1457808-combobox-virtualization

There is also a sample attached of implementing debouncing in a WASM app as a reference too.

---

A stack panel component that creates a layout of items that are vertically positioned.

It could also have a wrap layout to make the items horizontal with wrapping

or horizontal without wrapping

Create code snippets for all Blazor controls.

Provide either automation for installing into the Visual Studio toolbox or just provide as a web page for users to copy paste them into the Toolbox.

<TelerikDatePicker Id="startDate" @bind-Value="@StartDate" Width="160px" Format="dd-MMM-yy"></TelerikDatePicker>

DateTime StartDate=DateTime.Now

When our users type to click on the year and type another one they lose one of the digits - so if they try typing 19 or 18 for instance then it sets the date to year 01

I am implementing custom filtering by column in a data grid. The data source is very large so the filtering will be done by a stored procedure in the database. In order to avoid excessive calls to the procedure it would be great if the TextBox had a DebounceDelay property like the one in the SearchBox.

---

ADMIN EDIT

While not technically useful for the grid itself (see the bottom of this thread for more ideas and information on that, a built-in feature is coming there as well), there can be benefit in adding that to the inputs (e.g., the Editor has something like that already by default because it is designed for large content).

Thus, I am reopening this so we can gauge the interest.

In the meantime, using a few lines of application code can achieve debouncing of expensive api calls. Using the OnChange or OnBlur event may also be suitable workarounds, depending on the goal you are after.

---

Reloading the page described down below cause memory leak. Commenting lines with telerik button prevents the problem.

@page "/"

<h3 style="position:absolute; top: 0; z-index: 1000; margin-top: 10px">Home</h3>

↓ commenting these lines prevents the memory leak
<div>
    <TelerikButton OnClick="@SayHelloHandler" Primary="true">Say Hello</TelerikButton>
    <div>@helloString</div>
</div>
↑ commenting these lines prevents the memory leak

@code {
    List<string> strings = new List<string>();

    MarkupString helloString;

    protected override void OnInitialized()
    {
        // Attempt to clear memory with Garbage Collector
        GC.Collect();
        GC.WaitForPendingFinalizers();
        for (int i = 0; i < 1000000; i++)
        {
            string a = "asdasdasdasdddddddddasasdasdasdasdddddddddasasdasdasdasdddddddddasasdasdasdasdddddddddasasda";
            strings.Add(a + "b");
        }


        base.OnInitialized();
    }

    void SayHelloHandler()
    {
        string msg = string.Format("Hello from <strong>Telerik Blazor</strong> at {0}.<br /> Now you can use <b><u><i>C#</i></u></b> to write front-end!", DateTime.Now);
        helloString = new MarkupString(msg);
    }
}

MainLayout.razor:

@layout TelerikLayout
@inherits LayoutComponentBase


<style>
    .navmenu .k-drawer-items {
        margin-top: 3.5rem;
    }

    .navmenu .k-widget.k-drawer {
        background-image: linear-gradient(180deg, rgb(5, 39, 103) 0%, #3a0647 100%);
    }

    .k-drawer-container {
        height: 100vh;
    }

    .btn-margin, .btn-margin:hover {
        width: 48px;
        height: 56px;
        color: #FFF;
    }

    .navmenu .k-drawer {
        color: #ffffffd6;
    }

    .navmenu .k-drawer-item:hover, .navmenu .k-drawer-item.k-state-hover {
        color: #ffffffd6;
        background-color: #f0f0f012;
    }

        .navmenu .k-drawer-item:hover.k-state-selected {
            color: #ffffff;
            background-color: #7bafff94;
        }

    .navmenu .k-drawer-item:not(:hover).k-state-selected {
        color: #ffffff;
        background-color: #7bafffbd;
    }

    .navmenu .k-drawer:hover .k-drawer-wrapper {
        width: 240px;
    }

    .navmenu .k-drawer .k-drawer-wrapper {
        transition-duration: 300ms !important;
    }
</style>


<TelerikDrawer Data="@NavigablePages" MiniMode="true" Mode="@DrawerMode.Push" SelectedItem="SelectedItem" Class="navmenu sidebar"
                SelectedItemChanged="ChangeSelectedItem" TItem="DrawerItem">
    <Content>
        <div class="page">

            <div class="main">
                <div class="top-row px-4 auth">
                </div>


                <div class="content px-4">
                    @Body
                </div>
            </div>
        </div>
    </Content>
</TelerikDrawer>



@code {
    List<DrawerItem> NavigablePages { get; set; } =
        new List<DrawerItem>
        {
            new DrawerItem { Text = "Home", Url = "/", Icon = "home" }
        };

    public class DrawerItem
    {
        public string Text { get; set; }
        public string Url { get; set; }
        public string Icon { get; set; }
        public bool IsSeparator { get; set; }
    }
    DrawerItem SelectedItem { get; set; }

    private void ChangeSelectedItem(DrawerItem chosenItem)
    {
        SelectedItem = chosenItem;
    }
}

This code is example. The main problem was with TelerikGrid. Usage of any telerik component caused the same memory leak.

For example, I want to set the Sunday day to red or any other date to a special color.

<AdminEdit>

Here is a workaround that can be used until the feature is released

<style>
    .hide-calendar {
        display: none;
    }

    .special {
        color: red;
        font-weight: bold;
    }
</style>

<div style="width: 400px">
    <TelerikDateInput @bind-Value="@DateValue" Width="90%"></TelerikDateInput>
    <TelerikButton Icon="calendar"
                   OnClick="@( () => isClicked = !isClicked )">
    </TelerikButton>
</div>

<TelerikCalendar Class="@(!isClicked ? "hide-calendar" : "")"
                 @bind-Value="@DateValue"
                 OnCellRender="@OnCellRenderHandler"
                 Min="@(new DateTime(2000, 1, 1))"
                 Max="@(new DateTime(2090, 1, 1))">
</TelerikCalendar>

@code {
    private void OnCellRenderHandler(CalendarCellRenderEventArgs args)
    {
        if (args.View == CalendarView.Month)
        {
            args.Class = args.Date.Day % 3 == 0 ? "special" : "";
        }
        else if (args.View == CalendarView.Decade)
        {
            args.Class = args.Date.Year == 2020 ? "special" : "";
        }
    }

    private DateTime DateValue { get; set; } = DateTime.Today;

    private bool isClicked { get; set; }
}

</AdminEdit>

After update to 3.0.0 TextArea autosize no longer works.

AutoSize is no longer one of the available properties.

Also Label is no longer an available property.

We are based in the US; but want to display values in a numeric text box based on the culture of the place where the data was entered.

So if the data was entered in the UK, we want the number to be formatted according to UK culture, etc.  That way, it's easy to tell that number is representing pounds vs dollars, etc.

Can we please get the ability to set culture to specific controls?  We don't want to change the current thread culture for everything on the page, just for one control.

thanks!

Hello everyone,

at the moment the TooltipTemplateContext isn't very useful and hard to work with:

Problem: As you can see, "start" and "end" only contains a weired pre-build string.
As a developer I can't parse this (at least the year is missing), so I'd like to suggest, that you replace the Dictionary of <string,string> with an <string,object> and add the start and end as DateTime.

An alternative would be to pass a custom parameter or have the task item accessable directly.
In our use-case we have no need for the time (it's a gantt not a time table!) and the tasks won't end at the end of the year.

Regards

This feature is requesting a Blazor version of the RadPropertyGrid, or a more modern Material Design(ish) equivalent.

https://docs.telerik.com/devtools/wpf/controls/radpropertygrid/overview

As  more customers are adopting Blazor, we're porting our rich design time tooling to the web in SaaS type offers.  No Blazor control vendor has this type of control today, and it's sorely needed.  Even finding a Web/Angular version of this type of control is practically impossible.

Having this control combined with the existing Telerik Blazor property editors (combo boxes, edit fields, boolean controls, color pickers, font pickers, etc.) would give you a strong leg up on your competitors.

Note: Our company is already licensing your Blazor controls and I speak to Maria every few months on the roadmap.

When a column is filtered, I'd like a better visual indicator of that fact.

The solid background to the menu button is not appealing, and it is applied whether a column is sorted or filtered.

The only full-featured Blazor DataGrid | Telerik UI for Blazor

I'd like a distinct indication of whether a column is filtered -- perhaps a filter icon next to the header text similar to how you might see an arrow when sorted.

---

I've attempted to create this myself using OnStateChangedHandler to iterate through the columns and call a Javascript function that finds the right column header and appends a filter icon. It kind of works sometimes, but I'm not sure I'll able to get it working consistently. Even so, it feel like a fragile hack that will probably break in a future update.

Ideally this would be an added feature, but in the meantime is there a way I can accomplish this myself?

Hi Telerik Team

We will transfer the Pivot Grid from aspx to Pivot Grid Blazor Grid.

We couldn't found the Pivot Grid Blazor. Can you tell us, when it will be ready ?

Best regards

ATT

We're a paying customer for the Blazor software components under AVEVA.

We need to do a substantial amount of custom real-time drawing on top of a Blazor based map control using a layer rendered on top of the Tile Layer.  The currently supported Map layers are somewhat specific to smaller map indicators and static overlays.

Our rendering subsystem doing this drawing will be using SkiaSharp/Skia on WebAssembly, drawing on a Skiasharp canvas in the browser (this already works).  I'm assuming behind the scenes the Map is drawing with a standard HTML canvas.

I believe we need a solution which resembles the following:

- The Image is a layer rendered on top of the map viewport (as opposed to the entire map canvas)

- The Image layer can know the size of the ViewPort so it can create an identical size image (or perhaps this is handled automatically by the Map control)

- The Image layer can be re-rendered as often as the customer code desires (we're showing realtime data on top of maps, so we will want to re-render the Image layer say every 250ms.

- When the map viewport changes (pan, zoom, etc.), events are fired so the Image layer customer code can re-render the image based on the new viewport coordinates and zoom level.

- Click events are passed through the Image Layer for processing.

Since we're using a different rendering technology than the underlying map control, my assumption is the best way to keep this simple is our code draws to a SkiaSharp canvas then converts that to PNG/BMP/whatever so that can be injected into the Image layer for rendering.

It would be expected that every pan/zoom/viewport change causes an entire re-rendering of the Image layer.

In the Blazor DropDownList it would be great to provide custom text or template to replace the "no data" message when the Data property returns an empty collection. Often, in cascading dropdowns, an empty list occurs because a value up the hierarchy has not been chosen yet. For example, if you have dropdowns for County and City, the City dropdown will be empty until a County is selected. It would be nice if the City dropdown, in that case, could say "Please select a county first" instead of "no data".

Thanks.

<AdminEdit>

This is also applicable to the MultiSelect, ComboBox, AutoComplete. 

</AdminEdit>

After upgrading to Telerik Version 3.6.1 my CSS is messed up on my grids, the pagers look like the image below.