Please add TreeList Export to Excel

Regards

Andrzej

Would it be possible to have the ability to create compact TreeList's similar to how we can now in a Grid? Since Size=ThemeConstants.Grid.Size.Small is available a Grid now it seems natural this would be a next step. If we can be provided with a work around for the time being that would be great.

It would be nice to have the same capabilities for working with TreeList columns as in the ColumnMenu for Grid. Espesially columns chooser. 

I would like the TreeList to support row virtualization. It will be useful when working with large data.

Columns, which are added to the TreeList after the initial load, are not resizable.

I'm working on TreeList. Some of my columns will be rendered after the initial loading. I checked the code, seems you just set up column render right after the first time TreeList Header rendered. Mean the columns that will be rendered after the first-render time will not be resizable.

I'm using Telerik TreeList. I'm so happy that it supports Drag&Drop. But, if there are too many items on the list, it is really hard to drag an item from the top to the end of the list. The TreeList doesn't scroll the list automatically (Auto Scroll) when I drag an item to the edge of the TreeList.

Hello,

The scenario is:

1. Some filters are applied in OnStateInit
2. The user clears the filters from the Clear button in the filter menu.
3. The user opens the filter menu again and the checkboxes and textboxes look like the filters are still applied.

Test page: https://blazorrepl.telerik.com/cmasmAvk52l6Xckn02

This is a regression that occurred in version 3.2.0.

All of the above applies to the Grid component as well.

Currently, the TreeList CheckBox selection exposes an option to select the children if the parents are selected. Please also add support for CheckParents option similar to the one in the TreeView component. This will allow marking the parent as selected if its children are selected.

From what I can see, currently the only way to set the expanded items for a TreeList is through the state.

The main problem is that the state doesn't fire the OnExpand event, meaning that if you have a server loaded tree you need to make sure to load the data before each item is expanded. It also allows for duplicates in the 'ExpandedItems' if you don't check for duplicates before adding to it.

The TreeView has an 'ExpandedItems' parameter that can be bound which is a bit nicer than using the state, but from my quick test this also doesn't fire the OnExpand event.

 

My request is for one of the following to be added:

1. Similar to how you can set the 'HasChildrenField' or 'ItemsField' on the TreeList, allow a 'IsExpandedField' value to be bound (Should fire the OnExpand when changed if possible). This would be the simplest way allow bindable control over the expansion of items while also making it so we don't have to manage duplicates in the 'ExpandedItems' collection.
   
2. Expose a method to expand/unexpand rows. This would be different to manually changing the state as it would also fire the OnExpand event for each row expanded.
   
3. Similar to the TreeView, allow an 'ExpandedItems' to be bound. Preferably this would also fire the OnExpand event.

The TreeList should add an event OnDragStatus that would query the app during active dragging to determine if the current drag location is valid or not. If invalid, it could show the invalid drag icon:

This would give better feedback to the user during dragging.

Could you add this as a feature request please?

Not sure if this is a bug or missing feature, but when a user is actively doing drag and drop in the TreeList, the drag and drop should cancel as soon as they press 'Esc', just like in most apps. This is pretty standard behavior. Currently, pressing 'Esc' during drag and drop does not do anything.

If this is not a bug, could you please add this as a feature request?

Hello,

Please add support for sorting and filtering when the TreeList is data bound to a List<Dictionary> or ExpandoObject. Currently these data operations throw an exception System.ArgumentException: Invalid property or field

TreeList REPL page with Dictionary

TreeList REPL page with ExpandoObject

I am using TreeList and a custom template on a column to display user avatar. I also need to sort and filter on this column. However when combine all of these features (sort and filter) on a template column, it doesn't work. There are 2 scenarios:

- When enable sort, the filtering works

- When disable sort, the filtering doesnt work

Is there any work around solution for this? I am using UI for Blazor 3.0.1

My snippet

https://blazorrepl.telerik.com/mQuxlWkD32B5eGay33

Need an OnRowDoubleClick event for editing purposes.

I want to bind the treelist to dynamic objects like I can the grid: https://github.com/telerik/blazor-ui/tree/master/grid/binding-to-expando-object.

I would like to start the tree grid with all rows collapsed. At the moment I can do this only through load on demand.

*** Thread created by admin on customer behalf ***

Hello,

I am using a TelerikTreeList with an EditorTemplate with a TextBox for one of it's columns.

If i am adding a new object to the TreeList and begin typing in the cell with the EditorTemplate the cell is losing focus more or less on keystroke. (If you're typing quite fast it might be 2 or 3 characters before it loses focus.)

If i am editing an existing object the concerned cell doesn't lose focus.

If i change the binding of the TextBox in the EditorTemplate from "bind-Value" to "Value" it is working but i want to use the two-way-binding of the TextBox.

I have a similar UI with a grid instead of TreeList which is working fine with the TextBox in the EditorTemplate.

I Attached an example project to reproduce the problem.

I tested with google chrome, mozilla firefox and microsoft edge and i had the same problem in alle 3 browsers.

 

best regards

Unlike the grid, you don't have an OnRowClick event that will overcome the async limitations you indicate in the docs and support for OnSelect. Since everything I have is async, the binding solution just doesn't do enough if I can't catch the click. Is there an alternative to OnRowClick for the TreeList? If not, why not?

I am overriding the built-in Add command and setting an InsertedItem through the TreeList state. However, it looks like the the built-in validation is invoked twice and two validation Tooltips are displayed for the field.

 

I'm experiencing a flickering in the TreeList InCell Editing demo here: https://demos.telerik.com/blazor-ui/treelist/editing-incell

Steps to reproduce:

1. Click on "Mountain Bikes"

2. Click on "Road Bikes"

3. Click on "Touring Bikes"

It can actually be reproduced by clicking on any three editable cells.

Any ideas?

Thank you.