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Votes

In the grid column, the 'enum' property is non-nullable. If a binding value is not provided, it throws error

I've attached sample that produces the issue and I've determined the cause of it.  It is to do with enums and not having a default value if none is specified.  


23.2.7 (Tested this version and it's working)

Error:

blazor.server.js:1 [2023-12-28T17:23:18.113Z] Error: System.ArgumentNullException: Value cannot be null. (Parameter 'element')

at System.ArgumentNullException.Throw(String paramName)

at System.Attribute.GetCustomAttributes(MemberInfo element, Type attributeType, Boolean inherit)

at Syncfusion.Blazor.MetadataExtension.GetDisplayName(Enum enumValue)

at Syncfusion.Blazor.Grids.Internal.GridCellBase`1.GetValue()

at Syncfusion.Blazor.Grids.Internal.GridCellBase`1.OnParametersSetAsync()

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

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


Replication steps:

-->Run the attached sample you will see ths issue

@page "/s"

@using Syncfusion.Blazor.Grids
@using System.ComponentModel.DataAnnotations

<SfGrid @ref="Grid" DataSource="@dataSource" AllowSelection="true" Toolbar="@(new List<string>() {"Add", "Edit", "Delete", "Update", "Cancel"})">
    <GridEditSettings AllowEditing="true" Mode="EditMode.Dialog"></GridEditSettings>
   
    <GridColumns>
        <GridColumn Field="@nameof(DataItem.Id)"></GridColumn>


        <GridColumn Field="@nameof(DataItem.LineCategoryType)" HeaderText="Line Category" Visible="true" />

    </GridColumns>

</SfGrid>

@code{
    private SfGrid<DataItem> Grid;

    public List<DataItem> dataSource = new List<DataItem>()
    {
        new DataItem { Id = 1, ParentId = 1, ChildId = 1  },
        new DataItem { Id = 2, ParentId = 2, ChildId = 5, LineCategoryType = LineCategoryType.Basic }
    };

    public class DataItem
    {


        public int Id { get; set; }

        public int? ParentId { get; set; }

        public int? ChildId { get; set; }

        public LineCategoryType LineCategoryType { get; set; }
    }
    protected override async Task OnInitializedAsync()
    {

        await Task.CompletedTask;
    }



    public enum LineCategoryType
    {
        [Display(Name = "Basic")]
        Basic = 1,

        [Display(Name = "Trading")]
        Trading = 2,

        [Display(Name = "Accommodation")]
        Accommodation = 3,

        [Display(Name = "Opportunistic")]
        Opportunistic = 4,

        [Display(Name = "Non Renewable")]
        NonRenewable = 5
    }
   
}