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Request a Feature Report a Bug
Unplanned
Last Updated: 10 Oct 2025 09:47 by Vladimir
Gerard
Created on: 13 Dec 2022 01:33
Category: Splitter
Type: Feature Request
27
Persist Splitter pane content after collapse and expand

Hello,

I have a question regarding the persistence of content when blazor splitter panes are collapsed and expanded.

Please refer to the attached project to see the issue that I'm having.

Regards,

Gerard

Attached Files:
4 comments
Vladimir
Posted on: 10 Oct 2025 09:47

This will be really helpful feature for Splitter control, to behave like Tab Control when switching from one to another.

When working on it, please take in consideration preserving state also for those panes that are hidden also, with Visible false. Not only for Collapsed.

Basically we use splitter control to have multi-tab like control, show multiple tabs at same time and it would be great to have similar behaviour as tab strip control.

Thanks in advance.

Petr Jelínek
Posted on: 13 Nov 2024 00:16

Hi,

It is possible with set Size to 0px and Resizable to false.

<TelerikSplitter >
    <SplitterPanes >
    <SplitterPane @bind-Size="@MenuSize" Resizable="@ShowMenu" Collapsible="false">
            <MainMenuUC @ref=@RefMenu></MainMenuUC>
        </SplitterPane>
        <SplitterPane>
            @Body
        </SplitterPane>
    </SplitterPanes>
</TelerikSplitter>
private bool ShowMenu { get; set; } = true;
public string MenuSize { get; set; } = "200px";
private string MenuSizeOld { get; set; } = "200px";
private void ClickMenuHandler(object? sender, EventArgs e)
{
    ShowMenu = !ShowMenu;
    if (ShowMenu)
    {
        MenuSize = MenuSizeOld;
    }
    else
    {
        MenuSizeOld = MenuSize;
        MenuSize = "0px";
    }
    StateHasChanged();
}
 

Peili
Posted on: 07 Mar 2024 15:42
Yes this would be really helpful!
We don't want the component to lose its state when been collapsed and expanded.
ADMIN
Dimo
Posted on: 13 Dec 2022 07:27

Hi Gerard,

Thanks for the runnable project. I am converting this ticket to a public feature request and we will evaluate it. (By the way, it's better to include explanations in the ticket, rather than the project.) I am pasting the important part here:

>> I'd like to have the content of a splitter pane persist between the collapse and expand events, but I don't see a property for this (similar to the PersistTabContent="true" property for the TabStrip component). 

In the meantime, my suggestion is to retrieve the TreeView Data and bind the component automatically in OnInitialized or another suitable event of TreeComponent.razor, so that there is no need to do it manually every time. If your main goal is performance and efficiency, you can even experiment with an implementation that stores or passes the TreeView Data from the parent component.

Regards,
Dimo
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