Completed
Last Updated: 04 Dec 2020 21:18 by Jack
Created by: Jack
Comments: 2
Category: TreeList
Type: Feature Request
1
Need an OnRowDoubleClick event for editing purposes.
Completed
Last Updated: 01 Dec 2020 08:00 by ADMIN

If I pass XField parameters with a "null" value, it throws "ArgumentNullException: Value cannot be null. (Parameter 'name')" because it thinks the value is set, but apparently it does check if it's "null" before trying to "GetProperty".

 

Example, if any of these XField properties are null, it will throw the Exception

<TelerikTreeList Data="@Data"
                 IdField="@IdField"
                 ParentIdField="@ParentIdField"
                 HasChildrenField="@HasChildrenField"
                 ItemsField="@ItemsField">...</TelerikTreeList>

 

There should be a null check to ignore the use of that property in case it's null, otherwise, my code will need to be something like

 

@if (HasChildrenField != null && ItemsField != null)
{
    <TelerikTreeList Data="@Data"
                     IdField="@IdField"
                     ParentIdField="@ParentIdField"
                     HasChildrenField="@HasChildrenField"
                     ItemsField="@ItemsField">...</TelerikTreeList>
}
else if (HasChildrenField != null)
{
    <TelerikTreeList Data="@Data"
                     IdField="@IdField"
                     ParentIdField="@ParentIdField"
                     HasChildrenField="@HasChildrenField">...</TelerikTreeList>
}
else if (ItemsField != null)
{
    <TelerikTreeList Data="@Data"
                     IdField="@IdField"
                     ParentIdField="@ParentIdField"
                     ItemsField="@ItemsField">...</TelerikTreeList>
}

else

{

    <TelerikTreeList Data="@Data"
                     IdField="@IdField"
                     ParentIdField="@ParentIdField">...</TelerikTreeList>

}


Which isn't good.

 

At least "HasChildrenField" and "ItemsField" should have that check because it isn't a required parameter to have property for the TelerikTreeList  to work.

 

Error Stack

 

ArgumentNullException: Value cannot be null. (Parameter 'name')

  • System.Type.GetProperty(string name, BindingFlags bindingAttr)

  • System.Type.GetProperty(string name)

  • Telerik.Blazor.Extensions.ReflectionExtensions.GetPropertyValue(object target, string propertyName)

  • Telerik.Blazor.Data.TelerikTreeListDataSource<TItem>.CreateTreeListItem(TItem item, IEnumerable<TreeListItem<TItem>> childItems)

  • Telerik.Blazor.Data.TelerikTreeListDataSource<TItem>.GetItems(IEnumerable<TItem> data)

  • Telerik.Blazor.Data.TelerikTreeListDataSource<TItem>.BuildTree(IEnumerable<TItem> sourceData)

  • Telerik.Blazor.Data.TelerikTreeListDataSource<TItem>.InitData(IEnumerable<TItem> sourceData)

  • Telerik.Blazor.Data.TelerikTreeListDataSource<TItem>.ProcessData(IEnumerable data)

  • Telerik.Blazor.Components.Common.DataBoundComponent<TItem>.ProcessDataInternal()

  • Telerik.Blazor.Components.Common.DataBoundComponent<TItem>.OnParametersSetAsync()

  • Telerik.Blazor.Components.TelerikTreeList<TItem>.<>n__0()

  • Telerik.Blazor.Components.TelerikTreeList<TItem>.OnParametersSetAsync()

  • Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)

  • Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()

  • Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.HandleException(Exception exception)

  • Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToPendingTasks(Task task)

  • Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters)

  • Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(ref DiffContext diffContext, int frameIndex)

  • Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(ref DiffContext diffContext, int frameIndex)

  • Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(ref DiffContext diffContext, int newFrameIndex)

  • Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(ref DiffContext diffContext, int oldStartIndex, int oldEndIndexExcl, int newStartIndex, int newEndIndexExcl)

  • Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, int componentId, ArrayRange<RenderTreeFrame> oldTree, ArrayRange<RenderTreeFrame> newTree)

  • Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment)

  • Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)

  • Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()

  • Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.HandleException(Exception exception)

  • Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()

  • Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessPendingRender()

  • Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(int componentId, RenderFragment renderFragment)

  • Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()

  • Microsoft.AspNetCore.Components.ComponentBase.CallOnParametersSetAsync()

  • Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()

  • Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.HandleException(Exception exception)

  • Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToPendingTasks(Task task)

  • Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters)

  • Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderRootComponentAsync(int componentId, ParameterView initialParameters)

  • Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.CreateInitialRenderAsync(Type componentType, ParameterView initialParameters)

  • Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.RenderComponentAsync(Type componentType, ParameterView initialParameters)

  • Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext+<>c__11<TResult>+<<InvokeAsync>b__11_0>d.MoveNext()

  • Microsoft.AspNetCore.Mvc.ViewFeatures.StaticComponentRenderer.PrerenderComponentAsync(ParameterView parameters, HttpContext httpContext, Type componentType)

  • Microsoft.AspNetCore.Mvc.ViewFeatures.ComponentRenderer.PrerenderedServerComponentAsync(HttpContext context, ServerComponentInvocationSequence invocationId, Type type, ParameterView parametersCollection)

  • Microsoft.AspNetCore.Mvc.ViewFeatures.ComponentRenderer.RenderComponentAsync(ViewContext viewContext, Type componentType, RenderMode renderMode, object parameters)

  • Microsoft.AspNetCore.Mvc.TagHelpers.ComponentTagHelper.ProcessAsync(TagHelperContext context, TagHelperOutput output)

  • Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperRunner.<RunAsync>g__Awaited|0_0(Task task, TagHelperExecutionContext executionContext, int i, int count)

Unplanned
Last Updated: 24 Nov 2020 12:45 by ADMIN
Scheduled for 2.21.0
Created by: Jurgen
Comments: 2
Category: TreeList
Type: Feature Request
2
I now have a treelist with a few thousand items, but the filtering takes a few seconds, and halfway there is a refresh with partial results.

Now the users are complaining that they do not really know when the treelist is done with filtering.
Unplanned
Last Updated: 11 Nov 2020 16:03 by ADMIN
Created by: Andrea
Comments: 0
Category: TreeList
Type: Feature Request
2
I would like to have an event equivalent to the OnRead for the Grid so that I could make custom data operations such as applying custom filtering to the root items. 
Completed
Last Updated: 27 Oct 2020 06:32 by ADMIN
Release 2.18.0
Created by: Jurgen
Comments: 3
Category: TreeList
Type: Feature Request
5

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 ***

Declined
Last Updated: 20 Oct 2020 16:08 by ADMIN
Created by: Georgia N.
Comments: 3
Category: TreeList
Type: Bug Report
0

I use Guids to identify data in my application. It is a lot more reliable than using integers; however, it appears as if the TreeList does not support the use of Guids for the Id and ParentId fields when building the list's view.

---

ADMIN EDIT

This was not a bug, it was probably a configuration issue, as the scenario works, so this is marked as "declined". See the thread below for a sample.

---

Unplanned
Last Updated: 12 Oct 2020 07:35 by ADMIN
When I add a child to a node in the TreeList it would not render until I expand or collapse that node.
Unplanned
Last Updated: 06 Oct 2020 07:14 by ADMIN
Created by: SL
Comments: 0
Category: TreeList
Type: Feature Request
1
I want to show the totals in my hierarchical data
Unplanned
Last Updated: 17 Sep 2020 14:57 by ADMIN

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

Unplanned
Last Updated: 14 Sep 2020 09:08 by ADMIN
At the moment, clicking a row always alters the selection. I want to use only the selection column for selection so row clicks don't change it. A key issue is that when SelectChildren is set to true it only works for the checkbox, so clicking the row removes the selected children, and I don't want that.
Unplanned
Last Updated: 27 Aug 2020 14:45 by ADMIN
I have a TreeList, bound to an ObservableCollection data source. When I try to add new children the component stays in Create mode even after I click on the Update button.
Unplanned
Last Updated: 19 Aug 2020 06:56 by ADMIN
Created by: Wei
Comments: 0
Category: TreeList
Type: Feature Request
2
I would like the TreeList to support row virtualization. It will be useful when working with large data.