@page "/Test"
@using Telerik.Blazor.Components
@inject PreAwardJobSetupService preAwardSvr
<TelerikMultiColumnComboBox TItem="Estimate"
TValue="Guid?"
TextField="Display"
ValueField="Id"
@bind-Value="SelectedEstimateId"
Filterable="true"
ScrollMode="DropDownScrollMode.Virtual"
PageSize="@PageSize"
OnRead="@OnEstimateLookup"
Width="100%"
ItemHeight="@ItemHeight"
ListHeight="@ListHeight">
<MultiColumnComboBoxColumns>
<MultiColumnComboBoxColumn Field="Revision" Title="Revision" Width="80px" />
<MultiColumnComboBoxColumn Field="RevisionName" Title="RevisionName" Width="200px" />
<MultiColumnComboBoxColumn Field="Opportunity_Title" Title="Opportunity Title" Width="200px" />
<MultiColumnComboBoxColumn Field="Customer_Name" Title="Customer" Width="200px" />
<MultiColumnComboBoxColumn Field="ApprovalStatus" Title="Approval Status" Width="100px" />
<MultiColumnComboBoxColumn Field="OppStatus" Title="Opp Status" Width="100px" />
</MultiColumnComboBoxColumns>
</TelerikMultiColumnComboBox>
@code {
private Guid? SelectedEstimateId { get; set; }
public string ListHeight { get; set; } = "268px";
public int ItemHeight { get; set; } = 28;
public int PageSize { get; set; } = 50;
private async Task OnEstimateLookup(MultiColumnComboBoxReadEventArgs args)
{
string? filter = args.Request?.Filters?.OfType<Telerik.DataSource.FilterDescriptor>().FirstOrDefault()?.Value as string;
if (string.IsNullOrWhiteSpace(filter))
{
args.Data = new List<Estimate>();
args.Total = 0;
return;
}
int page = args.Request?.Page ?? 1;
int pageSize = args.Request?.PageSize ?? PageSize;
var result = await preAwardSvr.GetEstimatesPagedAsync(filter, page, pageSize);
args.Data = result.Estimates;
args.Total = result.TotalCount;
}
}
According to the documentation, Blazor DropDownTree Events - Telerik UI for Blazor, OnChange is invoked separately from ValueChanged to indicate the user has finalized a change, similarly to other components.
However, as far as I can tell, the OnChange event is never invoked, no matter what I try with the interface. Binding otherwise works fine.
Is this correct? I'm assuming since binding otherwise works fine, this could just be a documentation issue.
Using Telerik.UI.for.Blazor v13.1.0, DropDownTree is within a Razor component.

This is version 12.3.0
An application in production grew in memory consumption to several gigabytes and I've pinpointed the problem to the grid. The data of the grid is being updated frequently and each time the data of the grid is being updated with a new list, the memory goes up with hundreds of megabyte. Even when the page is reloaded with F5, the memory is not released.
I ran some memory profiling in visual studio 2022 but could not find anything useful (I'm not good at profiling), except that the object that has the most diff between snapshots is SharedArrayPool+Partition<Byte>
In the end I had to force a Garbage Collection before setting the Data prop of the grid, which helps.
Perhaps there is a better (or a right) way to update the data of the grid? I've tried so many things now :D

(Telerik.UI.for.Blazor v13.1.0)
I was scratching my head over this one for a while. No matter what I tried, even though the data and initial value were valid, the control always initially showed "None" (or just blank, depending on DefaultText). Interestingly, the X close button also was visible, so the control "knew" the value was set.
I tried all kinds of workarounds, delayed rendering, Rebind(), setting the value programmatically, nothing.
I'm sharing the workaround that worked for me, hopefully save some other users some time. Turned out all I needed to do was to add a custom ValueTemplate:
<TelerikDropDownTree Data="@myTreeData"
@bind-Value="selectedTreeValue"
DefaultText="None"
ShowClearButton="true">
<ValueTemplate>
@{
var selectedItem = FindItemById(myTreeData, selectedTreeValue);
<span>@(selectedItem != null ? selectedItem.Text : "None")</span>
}
</ValueTemplate>
</TelerikDropDownTree>I keep getting these errors after i updated to the latest release for a lot of charting components. This one is with ChartSeriesType.Area. The areas are there but don't have any coloring and are invisible.
telerik-blazor.js:1 Error: <path> attribute d: Expected number, "M140.35 13 L NaN 13 NaN 173.2…".
Hello,
when typing a date quickly via keyboard into a TelerikDatePicker, the component behaves incorrectly in multiple ways:
These issues make it nearly impossible to enter a date by typing it in one fluid motion, which is a common workflow for power users and keyboard-centric data entry.
Steps to reproduce: (also reproducible on the official Telerik demo page).
Click into the DatePicker so the day segment is focused.
Type a full date quickly (e.g. 02022020 for 02.02.2020) without pausing between segments.
Observe that the resulting date is incorrect — digits are misplaced or the cursor jumps unexpectedly.
Best regards

I have a situation where I need the:
EditMode="GridEditMode.Incell"
but I also need to have an event trigger when the row is updated:
EditMode="GridEditMode.Inline"
There is no mode that supports both, what are my options?
I need to be able to trigger some action on a Cell by Cell update basis, but also need to trigger a specific action on a Row update.
Thoughts?
Robl

How do I align the left pane to the top instead of it being centered vertically? The CSS provided by AI does not seem to override it.
<TelerikSplitter Orientation="SplitterOrientation.Horizontal">
<SplitterPanes>
<SplitterPane Size="40%" Min="30%" Max="70%"
Collapsible="false"
Scrollable="true"
Class="gsi-align-top-pane">
<TelerikSkeleton Height="600px" Width="100%" />
</SplitterPane>
<SplitterPane Collapsible="false" Min="30%" Max="70%" Scrollable="true">
<TelerikGridLayout Class="grid-layout">
<GridLayoutRows>
<GridLayoutRow />
<GridLayoutRow />
<GridLayoutRow />
</GridLayoutRows>
<GridLayoutItems>
<GridLayoutItem Row="1">
<TelerikSkeleton Height="75px"
Class="k-display-inline-block" />
</GridLayoutItem>
<GridLayoutItem Row="2">
<table class="k-grid">
@for (int i = 0; i < 10; i++)
{
<tr class=skeleton-table-row>
<td class="skeleton-table-col">
<TelerikSkeleton Width="100%"></TelerikSkeleton>
</td>
<td class="skeleton-table-col">
<TelerikSkeleton Width="100%"></TelerikSkeleton>
</td>
<td class="skeleton-table-col">
<TelerikSkeleton Width="100%"></TelerikSkeleton>
</td>
<td class="skeleton-table-col">
<TelerikSkeleton Width="100%"></TelerikSkeleton>
</td>
</tr>
}
</table>
</GridLayoutItem>
<GridLayoutItem Row="3">
<TelerikSkeleton Height="75px"
Class="k-display-inline-block" />
</GridLayoutItem>
</GridLayoutItems>
</TelerikGridLayout>
</SplitterPane>
</SplitterPanes>
</TelerikSplitter>
.gsi-align-top-pane {
display: flex !important;
flex-direction: column !important;
justify-content: flex-start !important;
align-items: stretch !important;
padding-top: 0 !important;
margin-top: 0 !important;
height: 100% !important;
min-height: 0 !important;
}
.gsi-align-top-pane > * {
margin-top: 0 !important;
margin-bottom: 0 !important;
align-self: flex-start !important;
}
.gsi-align-top-pane .k-skeleton {
margin-top: 0 !important;
margin-bottom: 0 !important;
align-self: flex-start !important;
/* Remove any auto margin that may be set by Telerik */
margin-block-start: 0 !important;
margin-block-end: 0 !important;
margin-block: 0 !important;
margin: 0 !important;
}
<TelerikPdfViewer MinZoom="0.5m" MaxZoom="1.5m" ZoomRate="0.25m" Zoom="0.5m"..
Zoom-DropDown box still present "200%, 300%, 400%"
My expectation is to limit the dropdown entries to the range given by MinZoom, MaxZoom
Version 13.1.0