DataGrid sorting and filtering stopped working

[stefanmitic]

Hello,

All of the actions in DataGrid suddenly stopped working.

Stack trace:

Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
Unhandled exception rendering component: Object reference not set to an instance of an object.
System.NullReferenceException: Object reference not set to an instance of an object.
at System.Linq.Dynamic.Core.Parser.KeywordsHelper..ctor(ParsingConfig config)
at System.Linq.Dynamic.Core.Parser.ExpressionParser..ctor(ParameterExpression[] parameters, String expression, Object[] values, ParsingConfig parsingConfig)
at System.Linq.Dynamic.Core.DynamicExpressionParser.ParseLambda(Type delegateType, ParsingConfig parsingConfig, Boolean createParameterCtor, ParameterExpression[] parameters, Type resultType, String expression, Object[] values)
at System.Linq.Dynamic.Core.DynamicExpressionParser.ParseLambda(ParsingConfig parsingConfig, Boolean createParameterCtor, ParameterExpression[] parameters, Type resultType, String expression, Object[] values)
at System.Linq.Dynamic.Core.DynamicExpressionParser.ParseLambda(ParsingConfig parsingConfig, Boolean createParameterCtor, Type itType, Type resultType, String expression, Object[] values)
at System.Linq.Dynamic.Core.DynamicQueryableExtensions.Where(IQueryable source, ParsingConfig config, String predicate, Object[] args)
at System.Linq.Dynamic.Core.DynamicQueryableExtensions.Where[Radnik](IQueryable1 source, ParsingConfig config, String predicate, Object[] args) at System.Linq.Dynamic.Core.DynamicQueryableExtensions.Where[Radnik](IQueryable1 source, String predicate, Object[] args)
at Radzen.QueryableExtension.Where[Radnik](IQueryable1 source, IEnumerable1 columns)
at Radzen.Blazor.RadzenDataGrid1[[WebApp.Pages.Index.Radnik, WebApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].get_View() at Radzen.PagedDataBoundComponent1[[WebApp.Pages.Index.Radnik, WebApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].get_PagedView()
at Radzen.Blazor.RadzenDataGrid1[[WebApp.Pages.Index.Radnik, WebApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].DrawGroupOrDataRows(RenderTreeBuilder builder, IList1 visibleColumns)
at Radzen.Blazor.RadzenDataGrid1.<>c__DisplayClass6_0[[WebApp.Pages.Index.Radnik, WebApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].<DrawRows>b__0(RenderTreeBuilder builder) at Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder.AddContent(Int32 sequence, RenderFragment fragment) at Radzen.Blazor.RadzenDataGrid1[[WebApp.Pages.Index.Radnik, WebApp, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].BuildRenderTree(RenderTreeBuilder __builder)
at Microsoft.AspNetCore.Components.ComponentBase.<.ctor>b__6_0(RenderTreeBuilder builder)
at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()

Razor component:

<RadzenDataGrid Data="@_radnici" TItem="Radnik" AllowSorting="true" AllowFiltering="true" FilterMode="FilterMode.Simple"
                FilterCaseSensitivity="FilterCaseSensitivity.CaseInsensitive" EmptyText="Нема резултата.">
    <Columns>
        <RadzenDataGridColumn TItem="Radnik" Property="Id" Title="Запослени ИД" />
        <RadzenDataGridColumn TItem="Radnik" Property="Ime" Title="Име" />
        <RadzenDataGridColumn TItem="Radnik" Property="Prezime" Title="Презиме" />
    </Columns>
</RadzenDataGrid>

@code {
    private IEnumerable<Radnik> _radnici;

    protected override void OnParametersSet()
    {
        _radnici = new List<Radnik>()
    {
            new Radnik() {Id = 1, Ime="Petar", Prezime = "Petrovic"},
            new Radnik() {Id = 2, Ime="Marko", Prezime = "Markovic"}
        };
    }

    private class Radnik
    {
        public int Id { get; set; }
        public string Ime { get; set; }
        public string Prezime { get; set; }
    }
}

Thank you.

[enchev]

Any info about DataGrid settings?

[stefanmitic]

For some reason Grid settings are not shown here.

[enchev]

You can use markdown for code in our forum, check the forum FAQ for reference. I’ve edited your first post.

[enchev]

I've tested your grid and everything worked normally on my end:

[stefanmitic]

Hi @enchev

I found out that bug only occurs after my app gets authenticated using Identity server 4. When I allow anonumous access all data grid features work as expected.

I am new to Radzen components, so am I missing something about security related data grid stuff?

Thank you

[enchev]

Hi @stefanmitic ,

There is no security related code in the DataGrid, most probably some code in your application is crashing - you can use Visual Studio to debug it.