Button-Markupstring in Blazor (c#) from CodeBehind does not trigger onclick-event

I'm using a Blazor WebApp with C# and .net 6.In this example I'm using the standard project "Blazor Server App" (VS 2022) for testing.

I built a own "table helper", where I can pass a dataset in the codebehind which is displayed on the page with a single command.The full file is here: Table.cs

using System.Text;using Microsoft.AspNetCore.Components;namespace MarkusH.Modulxo.Webclient.Components{    public class Table    {        private Columnset _columnset = null;        private Dataset _dataset = null;        private List<string> _classes = new List<string>();        private string _linkNew = "";        private string _linkEdit = "";        public Table()        {            AddClasses("table", "table-striped");        }        public void SetColumnset(Columnset columnset)        {            _columnset = columnset;        }        public void SetDataset(Dataset dataset, string orderByAttributeName = "")        {            _dataset = dataset;            if (!string.IsNullOrWhiteSpace(orderByAttributeName))            {                SortRecordsBy(orderByAttributeName);            }        }        public void SortRecordsBy(string orderByAttributeName)        {            _dataset?.OrderBy(orderByAttributeName);        }        public void SetLinkNew(string linkNew)        {            _linkNew = linkNew;        }        public void SetLinkEdit(string linkEdit)        {            _linkEdit = linkEdit;        }        public void AddClasses(params string[] classes)        {            _classes.AddRange(classes);        }        public MarkupString ShowComponent()        {            var stringBuilder = new StringBuilder();            if (_columnset != null)            {                stringBuilder.Append(BuildTableHeader());                stringBuilder.Append(BuildTableBody());                stringBuilder.Append(BuildTableFooter());            }            return (MarkupString)stringBuilder.ToString();        }        private string BuildTableHeader()        {            var stringBuilder = new StringBuilder();            stringBuilder.AppendLine($"<table class='{string.Join(" ", _classes)}'>");            stringBuilder.AppendLine("<thead><tr>");            foreach (var column in _columnset.Columns)            {                stringBuilder.Append($"<th @onclick='() => SortRecordsBy({column.AttributeName})'>{column.Header}</th>");            }            stringBuilder.Append("<th>");            if (!string.IsNullOrEmpty(_linkNew))            {                stringBuilder.Append($"<a href='{_linkNew}'>New</a>");            }            stringBuilder.Append("</th>");            stringBuilder.AppendLine("</tr></thead>");            return stringBuilder.ToString();        }        private string BuildTableBody()        {            var stringBuilder = new StringBuilder();            stringBuilder.AppendLine("<tbody>");             if (_dataset != null && _dataset.Records.Count > 0)            {                stringBuilder.Append(BuildTableBodyFromData());            }            else            {                stringBuilder.Append(BuildTableBodyNoRecords());            }            stringBuilder.AppendLine("</tbody>");            return stringBuilder.ToString();        }        private string BuildTableBodyFromData()        {            var stringBuilder = new StringBuilder();            foreach (var record in _dataset.Records)            {                stringBuilder.AppendLine("<tr>");                foreach (var column in _columnset.Columns)                {                    stringBuilder.Append($"<td>{record.GetAttributeValue<object>(column.AttributeName).ToString()}</td>");                }                stringBuilder.Append("<td>");                if (!string.IsNullOrEmpty(_linkEdit))                {                    stringBuilder.Append($"<a href='{_linkEdit.Replace("%id%", record.Id.ToString())}'>Edit</a>");                }                stringBuilder.Append("</td>");                stringBuilder.AppendLine("</tr>");            }            return stringBuilder.ToString();        }        private string BuildTableBodyNoRecords()        {            var stringBuilder = new StringBuilder();                stringBuilder.AppendLine("<tr>");                stringBuilder.Append($"<td colspan='{_columnset.Columns.Count + 2}'>No data</td>");                stringBuilder.AppendLine("</tr>");            return stringBuilder.ToString();        }        private string BuildTableFooter()        {            var stringBuilder = new StringBuilder();            stringBuilder.AppendLine("</table>");            return stringBuilder.ToString();        }    }}

The implementation in codebehind looks like: Countrylist.razor.cs

...protected override async Task OnAfterRenderAsync(bool firstRender)        {            if (firstRender)            {                await addressbookService.InitMoxClient();                if (ForwardToLoginPageIfNotAuthenticated(addressbookService)) { return; }                var countries = addressbookService.GetCountryList();                _countryTable.SetDataset(new Dataset(new List<MoxBaseRecord>(countries)), "Countryname");                StateHasChanged();            }        }...

As you can see, the table headers should sort the data within - but the onclick-function-call is not rendered correctly.

I found multiple topics addressing more or less the same problem, but the most hints I found were to loop trough the objects on the page instead of the code-behind - but I want to build a generic component to use on multiple pages - so I couldn't figerout how to achive the same result.

It would be great if someone can provide a hint/solution to solve the issue.

Thanks and regards

Markus