Currently, if I call Grid.AutoFitAllColumnsAsync "too early" it throws a null reference exception.

I am aware that this is a limitation but the behavior can be improved. For example, handle the exception and provide some useful information or give me a programmatic way to know if it's too early to call autofit.

I have a Grid with TItem="Dictionary<string, object>". I am not able to programmatically set EditItem and EditField through state.

I tried saving the state while editing to ensure the EditItem and EditField will be properly stored. When I try to retrieve this state object afterwards nothing happens.

Reproduction: https://blazorrepl.telerik.com/GnvYaIbd19iOZ6GH08.

Hello,

in some cases there is no way to scroll grid using mousewheel. Try this REPL please - https://blazorrepl.telerik.com/GdkXuLuX10P8sOF040. Scroll down, focus any cell in the last row and try to scroll up using your mouse wheel again.  Grid always scrolls back to the last row.

Can you check that please?

Very thanks.

Miroslav

Using the following configuration does not produce the expected result:

 <GridSettings>
        <GridPopupEditFormSettings ButtonsLayout="FormButtonsLayout.Center"/>
 </GridSettings>

The button layout is always left no matter what you choose.

===

ADMIN EDIT

===

Possible workarounds for the time being are to position the buttons with CSS or use a Popup Buttons Template.

Hi

The reset button is not working when we use the column template with the Telerik grid. How to solve this problem? Can you please send it example for reference?

Example Link :

Working Without Column Template

=>https://demos.telerik.com/blazor-ui/grid/column-menu

Not Working With Column Template

=>https://demos.telerik.com/blazor-ui/grid/custom-column-menu

Thanks

When initial grouping is set through the state, the GroupFooterTemplate does not render. One has to perform some action for refreshing the Grid in order to display the template - for example, collapsing/expanding a group.

For reference, the GroupHeaderTemplate renders correctly.

Reproduction: https://blazorrepl.telerik.com/wRaJFgFy10vagYnf05

===

ADMIN EDIT

===

The GroupFooterTemplate renders with a delay after the Grid. A possible workaround for the time being is to refresh the Grid after it has been initialized to ensure the GroupFooterTemplate will be displayed.

Example: https://blazorrepl.telerik.com/mxkJvAbI17SoNaE148

When the Virtualization feature is enabled, triggering Incell edit causes the Grid to scroll. When we scroll the edit is canceled. This happens when the row is partially visible.
https://www.screencast.com/t/zCJ9z9P83c

A more specific case is when you try to edit the last row. In case the editor height is bigger than the row height the Grid tries to scroll but there is no more data. The editor is closed and the item cannot be edited.
https://www.screencast.com/t/331cT4xxt

Reproduction: https://blazorrepl.telerik.com/QxEcECvx22pq4BBG59

App just crashed with the below exception.  My code isn't in the stack trace. Chances are there is no proper validation on parameters, allowing me to supply bad data, which later causes this problem.  Please validate the data better, debugging these things is not easy.

Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware: Error: An unhandled exception has occurred while executing the request.

System.ArgumentNullException: Value cannot be null. (Parameter 'source')
   at System.Linq.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Telerik.Blazor.Components.TelerikGrid`1.SetProcessedData(IEnumerable data)
   at Telerik.Blazor.Components.Common.DataBoundComponent`1.ProcessDataSourceResult(DataSourceResult result)
   at Telerik.Blazor.Components.Common.GridBase`1.ProcessDataSourceResult(DataSourceResult result)
   at Telerik.Blazor.Components.Common.DataBoundComponent`1.ProcessDataInternal()
   at Telerik.Blazor.Components.TelerikGrid`1.ProcessDataInternal()
   at Telerik.Blazor.Components.Common.DataBoundComponent`1.OnParametersSetAsync()
   at Telerik.Blazor.Components.TelerikGrid`1.OnParametersSetAsync()
   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
   at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
   at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange`1 oldTree, ArrayRange`1 newTree)
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(Int32 componentId, RenderFragment renderFragment)
   at Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()
   at Microsoft.AspNetCore.Components.ComponentBase.CallOnParametersSetAsync()
   at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderRootComponentAsync(Int32 componentId, ParameterView initialParameters)
   at Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.RenderComponentAsync(Type componentType, ParameterView initialParameters)
   at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<>c__11`1.<<InvokeAsync>b__11_0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.ViewFeatures.StaticComponentRenderer.PrerenderComponentAsync(ParameterView parameters, HttpContext httpContext, Type componentType)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.ComponentRenderer.PrerenderedServerComponentAsync(HttpContext context, ServerComponentInvocationSequence invocationId, Type type, ParameterView parametersCollection)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.ComponentRenderer.RenderComponentAsync(ViewContext viewContext, Type componentType, RenderMode renderMode, Object parameters)
   at Microsoft.AspNetCore.Mvc.TagHelpers.ComponentTagHelper.ProcessAsync(TagHelperContext context, TagHelperOutput output)
   at Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperRunner.<RunAsync>g__Awaited|0_0(Task task, TagHelperExecutionContext executionContext, Int32 i, Int32 count)
   at EnrichmentEngine.Pages.Pages__Host.<ExecuteAsync>b__15_1() in C:\Users\PeterDrier\source\repos\fleet\src\sovereign\dotnet\services\studio-calc-engine\SummaReportsPoc\Pages\_Host.cshtml:line 25
   at Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperExecutionContext.SetOutputContentAsync()
   at EnrichmentEngine.Pages.Pages__Host.ExecuteAsync() in C:\Users\PeterDrier\source\repos\fleet\src\sovereign\dotnet\services\studio-calc-engine\SummaReportsPoc\Pages\_Host.cshtml:line 7
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, String contentType, Nullable`1 statusCode)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, String contentType, Nullable`1 statusCode)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeResultAsync>g__Logged|22_0(ResourceInvoker invoker, IActionResult result)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|30_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddlewareImpl.<Invoke>g__Awaited|8_0(ExceptionHandlerMiddlewareImpl middleware, HttpContext context, Task task)

By the following steps, the problem occurs:

1. Click on line number 1 to focus the row
2. Press the Down-Key 19 times to navigate to line 20
3. Try to navigate to line 21 via the Down-Key
4. -> No navigation possible via keyboard to the lines below
5. Try to navigate backwards via Up-Key to line 1
6. -> Navigation stops at line 15

So, it not possible to navigate through the whole grid with virtualized rows when Navigable=true





@* Scroll the grid instead of paging *@

<TelerikGrid Data=@GridData
             ScrollMode="@GridScrollMode.Virtual" Navigable="true"
             Height="480px" RowHeight="60" PageSize="20"
             Sortable="true" FilterMode="@GridFilterMode.FilterMenu">
    <GridColumns>
        <GridColumn Field="Id" />
        <GridColumn Field="Name" Title="First Name" />
        <GridColumn Field="LastName" Title="Last Name" />
        <GridColumn Field="HireData" Width="200px">
            <Template>
                @((context as SampleData).HireDate.ToString("MMMM dd, yyyy"))
            </Template>
        </GridColumn>
    </GridColumns>
</TelerikGrid>

@code {
    public List<SampleData> GridData { get; set; }

    protected override async Task OnInitializedAsync()
    {
        GridData = await GetData();
    }

    private async Task<List<SampleData>> GetData()
    {
        return Enumerable.Range(1, 1000).Select(x => new SampleData
        {
            Id = x,
            Name = $"name {x}",
            LastName = $"Surname {x}",
            HireDate = DateTime.Now.Date.AddDays(-x)
        }).ToList();
    }

    public class SampleData
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string LastName { get; set; }
        public DateTime HireDate { get; set; }
    }
}

I want to be able to use interfaces and models that are created from a service when working with the grid. A parameterless constructor is not enough for me, I need to be able to instantiate models in a more complex manner.

---

ADMIN EDIT

The tentative event name I have put in the title might vary when the implementation is researched. The goal would still be the same - the grid to provide an event when it needs an instance of the model so you can provide it with one. At the moment this happens when a row enters edit mode, when the filter list needs to be built, and when you are inserting an item (a caveat with the last one might be the OnClick event for the command button - the new event might have to fire before OnClick so it can give you the model).

---

When the Grid has a non-grouped column at first position, there is a missing left border in an adjacent cell on the second line of the header area.

First reported in:

https://www.telerik.com/forums/multi-column-line-in-grid-occasionally-missing

Possible workarounds:

• Move the non-grouped column to another position.
• Wrap the non-grouped column in its own group.

Test page to reproduce:

(Uncomment the group column to use the second workaround from above.)

<TelerikGrid Data="@Data">
    <GridColumns>
        @*<GridColumn Title="Title">
        <Columns>*@
            <GridColumn Field="ID" />
        @*</Columns>
        </GridColumn>*@
        <GridColumn Title="Group">
            <Columns>
                <GridColumn Field="Name" />
            </Columns>
        </GridColumn>
    </GridColumns>
</TelerikGrid>

@code {

    public List<GridItem> Data { get; set; } = new List<GridItem>() {
        new GridItem() { ID = 1, Name = "Name 1" }
    };

    public class GridItem
    {
        public int ID { get; set; }
        public string Name { get; set; }
    }
}