Dear Telerik,

I'd like to post a new feature request- > A checkbox column.
Where it is possible to select multiple rows.

Regards,

Gert

Hi

I have a question regarding the telerik grid component particularly the hierarchy. Is it possible to open a hierarchy programmatically? For example:

I have my grid with information. Every row have more information to show. Those are stored in a hierarchy level to this row. Can I, instead of clicking the '+'-button in the row, just open it with with a method that i call e.g. in another button?

I want to make the rows clickable, i saw in the forum that this isn't yet supported for the grid. Now, I'm placing a div-Tag in the DetailTemplate of this row, and give that div a onclick-Attribute. The method the div invokes, should open the row for me respectively show the hierarchy of this row.

Is this possible?

thanks for your support.

regards

Ali Shala

Hello Team,

I am using "FilterMode="GridFilterMode.FilterRow". For int values there is a "numeric chooser" in the column header and the filter option "contains" is not available.

This is the correct behaviour. But when I bind the column to a ulong, ushort, ... value theses seems to be considered as string. There is no "numeric chooser"  and the filter "contains" is available, which resullts in further problems with the OData endpoint.

1. Load a page with a Grid with Reorderable = true

2. While Grid is rendering load a different page

--> Unhandled ObjectDisposedException

Error: System.ObjectDisposedException: Cannot access a disposed object.

Object name: 'DotNetObjectReference`1'.

   at Microsoft.JSInterop.DotNetObjectReference`1.ThrowIfDisposed()

   at Microsoft.JSInterop.JSRuntime.TrackObjectReference[TValue](DotNetObjectReference`1 dotNetObjectReference)

   at Microsoft.JSInterop.Infrastructure.DotNetObjectReferenceJsonConverter`1.Write(Utf8JsonWriter writer, DotNetObjectReference`1 value, JsonSerializerOptions options)

   at System.Text.Json.JsonSerializer.WriteDictionary[TProperty](JsonConverter`1 converter, JsonSerializerOptions options, WriteStackFrame& current, Utf8JsonWriter writer)

   at System.Text.Json.JsonPropertyInfoNotNullable`4.OnWriteDictionary(WriteStackFrame& current, Utf8JsonWriter writer)

   at System.Text.Json.JsonPropertyInfo.WriteDictionary(WriteStack& state, Utf8JsonWriter writer)

   at System.Text.Json.JsonSerializer.HandleDictionary(JsonClassInfo elementClassInfo, JsonSerializerOptions options, Utf8JsonWriter writer, WriteStack& state)

   at System.Text.Json.JsonSerializer.Write(Utf8JsonWriter writer, Int32 originalWriterDepth, Int32 flushThreshold, JsonSerializerOptions options, WriteStack& state)

   at System.Text.Json.JsonSerializer.WriteCore(Utf8JsonWriter writer, Object value, Type type, JsonSerializerOptions options)

   at System.Text.Json.JsonSerializer.WriteCore(PooledByteBufferWriter output, Object value, Type type, JsonSerializerOptions options)

   at System.Text.Json.JsonSerializer.WriteCoreString(Object value, Type type, JsonSerializerOptions options)

   at Microsoft.JSInterop.JSRuntime.InvokeAsync[TValue](String identifier, CancellationToken cancellationToken, Object[] args)

   at Microsoft.JSInterop.JSRuntime.InvokeWithDefaultCancellation[T](String identifier, Object[] args)

   at Telerik.Blazor.Components.Grid.GridHeaderRowBase`1.InitColumnReorderable()

   at Telerik.Blazor.Components.Grid.GridHeaderRowBase`1.OnAfterRenderAsync(Boolean firstRender)

   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle)

You might have to try a few times to dispose the page at the correct time.  With larger Grids it happens more frequently.

Grids without Reorderable = true do not throw an exception!

Hi,

It would be nice to have a property available on a GridColumn where you could indicate that the column should only be visible when you export the data, and not on, screen.

Thanks,

Tom

Add a setting similar to the AllowUnsort so that I can disable the unsorted state of the Grid.

ADMIN EDIT:

Here is how to achieve this with the Grid state.

@GridEditMode.Incell mode does not update automatically on row change when an editortemplate is used, as below

            <GridColumn Field=@nameof(ProjectRankingInfo.Ranking.Option2) Title="@Option2Title" Width="120px" Filterable="false">
                <EditorTemplate>
                    @{
                        currentItem = context as ProjectRankingInfo.Ranking;
                        <TelerikNumericTextBox Max="10" Min="0" Step="1" @bind-Value=@currentItem.Option2 />
                    }
                </EditorTemplate>
            </GridColumn>

one must click the update button for the update to occur,

Incell works fine and updates on row change for simple grid columns

ADMIN EDIT: SOLUTION: Read the details in the following article: https://docs.telerik.com/blazor-ui/components/grid/editing/incell#notes

ADMIN EDIT: this thread is rather long and I am adding the workaround offered by René here:

Hi,

This relates to my forum post here: https://www.telerik.com/forums/grid-selection-performance

I've noticed that the grid becomes very slow to select a row and to page when there is more than a little data being displayed. In the test project attached it can take 9 seconds to just select a row on the grid which is unworkable. Although we can reduce the amount of data and use paging in the real application we are developing it is still far too slow for Production use.

The test application has 2 pages, one using the Telerik grid and one using a simple component that draws an HTML table and handles selection. My aim was to prove that the problem is not down to Blazor re-rendering when a row is selected. The simple component it is around 0.3 seconds to select a row vs 9 seconds for the Telerik grid.

Obviously I appreciate that the Telerik grid is doing a lot more than the component, but it is not just Blazor that is causing this issue, it must be related to the work the grid has to do when a row is selected.

The attached project has 2 pages, one using the Telerik Grid one using my simple component. Click the load button to generate 300 rows of test data and then try clicking on a row. You can see the problem by running a performance trace in either Firefox or Chrome. The browser can even become unresponsive just clicking on a row, which you will appreciate is impossible to live with. If that doesn't happen you can try increasing the amount of data generated.

Thanks for your time!
Kind Regards,
Nick.

If I set grouping in OnStateInit, the GroupFooterTemplate does not have data for the aggregates I have set. If I group manually by dragging a column header, the data is there.

------

ADMIN EDIT: This stems from a framework behavior. The <GridAggregates> tag is a child component of the grid and as such, initializes after the grid. Since there is no event when all such child components are initialized the parent component cannot wait for them before starting to render and thus, it initializes before it can know what aggregates are defined.

I would like to be able to customize the default format for dates and numbers that the grid has to, for example, use the current UI culture of my app.

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