Hello Support Team,

I have a Item Template for my Treeview. I want to make the background color different for my selected item and let it stick. When the user selects another item, it should highlight that selected item and other items should look normal.

<TelerikTreeView Data="@DefectTreeView" @bind-ExpandedItems="@ExpandedItems"  SelectionMode="TreeViewSelectionMode.Single" >                    
                            <TreeViewBindings>                    
                                <TreeViewBinding IdField="DefectCategoryID" ParentIdField="ParentID" TextField="DefectCategoryName" HasChildrenField="HasChildren" IconField="folder-open" >
                                    <ItemTemplate>
                                        @{
                                            var item = context as DefectDefectCategory_TreeViewResultModel;
                                            var chkenabled = false;
                                            var chkvalue = false;
                                            if (item.HasChildren == false && item.ChildrenCount == 0)
                                            {
                                                chkenabled = true;
                                                <div style="padding-right: 4px;">
                                                    <TelerikCheckBox Enabled="chkenabled" Id="chkDelete" Title="Check to Delete Category" ValueChanged="@((bool value) => GetSelectedTreeItemsDelete(value,item.DefectCategoryID))" > 
                                                    </TelerikCheckBox>
                                                </div>
                                            }                                            
                                            var itemname = item.DefectCategoryName.ToString() + " (" + item.ChildrenCount.ToString() + ")";                                           
                                           @itemname;
                                        }
                                    </ItemTemplate>                                    
                                </TreeViewBinding>
                            </TreeViewBindings>                            
                        </TelerikTreeView>

How do I set the css style to show the selected item.

Thank you.

I'm developing an application where accessibility is very high priority, and I'm finding that every time I try to use one of your controls within the application, there is some sort of issue with its usability, mostly with screen readers.  While I know that you are working on trying to make the controls more accessible, this appears to be slow going. 

Further, I'm not seeing any options for workarounds.  For example, most of the controls are missing certain aria labels that would make them viable to use with screen readers, but because you have deciding not to implement allowing arbitrary attributes / attribute splatting within your controls I can't do anything to get these controls working for screen reader users. As a result, I keep having to roll my own controls instead of using yours, even though in most cases your control is 90% there.

Take the Multi-select control.  It has keyboard support, which is great, and it does read the options when navigating through the dropdown, but once you have selected an option, there is no way to get a screen reader to read any of the selected tags.

Another example is with your checkbox control. I need a way to set an aria-invalid attribute on the control, but I can't do so because your controls don't support attribute splatting: http://https://feedback.telerik.com/blazor/1416978-support-arbitrary-attributes?_ga=2.192430378.1005614243.1645625246-1187442152.1626202564

Other examples include:

https://www.telerik.com/forums/how-to-alter-aria-attributes-on-menu-and-panelbar

https://www.telerik.com/forums/how-to-add-html-aria-attributes-to-telerik-components

https://www.telerik.com/forums/ignore-forward-slash-allow-various-formats-when-using-date-input

I know that you are working on some of these things, but this is not something that I can wait months for to be released.  So I'm asking are there any work arounds for some of these issues?  If you had chosen to support arbitrary attributes, it would ease the frustration of waiting for a fix because we could have used that method as a workaround.  Is there anything that I can do now to mitigate my issues short of writing the controls from scratch?  

Is there any way to turn off grouping before exporting to excel and then turn it back on.  I have tried utilizing the before and after export events but it does not seem to work.

	private async Task OnExcelAfterExportAsync(GridAfterExcelExportEventArgs args)
	{
		await ticketGrid.SetState(currentGridState);
	}

	private async Task OnExcelBeforeExportAsync(GridBeforeExcelExportEventArgs args)
	{
		currentGridState = ticketGrid.GetState();

		GridState<TicketListModel> tempState = new()
			{
				SortDescriptors = currentGridState.SortDescriptors,
				FilterDescriptors = currentGridState.FilterDescriptors,
				GroupDescriptors = new List<GroupDescriptor>()
			};

		await ticketGrid.SetState(tempState);

		args.Columns = args.Columns.Except(args.Columns.Where(c => c.Field == "HasAttachments")).ToList();

		var statusColumn = args.Columns.First(c => c.Field == "StatusId");
		statusColumn.Field = "Status";

		var priorityColumn = args.Columns.First(c => c.Field == "PriorityId");
		priorityColumn.Field = "Priority";

		var areaColumn = args.Columns.First(c => c.Field == "Area");
		areaColumn.Width = "150px";

		args.IsCancelled = false;
	}

I have a handler for OnSelect, where I take the files and store them on the server. However, after this is done, the FileSelector still shows the files to the user, for no reason.

I couldn't find anyway in the code to clear the list of files or to indicate to the FileSelector that the uploading was done. It doesn't look right when I tell the user "Upload Done!", yet the files selected by the user are still listed visible in the FileSelector.

The user wants to enter several values separated by a comma, but with AutoComplete, when the user selects a value, it always clears the previous values.

Is it possible to have an Append behavior, where the value gets appended rather than the current Overwrite behavior?

What I want to do is actually almost the same as the Tags textbox I used now to create this post. Thanks!

Edit: Never mind, I think Multiselect is what I should use. https://demos.telerik.com/blazor-ui/multiselect/overview

Is it possible to catch all errors in Blazor Server like in MVC 5 in global.asax on Application_Error and send an email to application administrator?

thank you,

MAtej

Hello, per the documentation here:

https://docs.telerik.com/blazor-ui/components/grid/columns/command

Yet ChildContent doesn't appear to exist?  It doesn't come up in IntelliSense.  When I try using it anyhow, the text appears in red, or worse, ReSharper thinks it's a constant from some library that hasn't been imported:

Your examples don't show how to use ChildContent, so I'm making educated guesses.

I can get away from the "red text" by pointing it to a string:

<GridCommandButton Command="Test" ChildContent="@test"></GridCommandButton>

and

@code {
    private string test = "Test Content";
}

However I get compiler errors, so I don't think that's correct either.

It looks like the compiler is expected ChildContent to be a RenderFragment:

Error CS0030 Cannot convert type 'string' to 'Microsoft.AspNetCore.Components.RenderFragment' 

I can use the alternate method of putting the text between the tags:

<GridCommandButton Command="Test">Test</GridCommandButton>

I initially tried the ChildContent method because I can getting a warning I didn't initially understand when I tried using the text between the tags.  I now understand that was a ReSharper warning of no significance.

But I thought I'd point out docs for ChildContent appear to be incomplete?

Thanks.

My scenario is: When the user starts making changes, I am showing a warning notification to the user to not forget to hit save. After the user presses save, I want to make that notification disappear if it is still visible and the user haven't closed it themselves yet.

Please let me know if its possible to do so.

Thanks,

Alex

I have a TreeView with checkboxes.

How can I hide a checkbox for a parent node?

also, is there CheckedChanged event ?