radzen-blazor/RadzenBlazorDemos/Pages/DocumentProcessingLocalization.razor

@using System.Globalization
@using Radzen.Documents.Spreadsheet

<RadzenText TextStyle="TextStyle.Body1" TagName="TagName.P" class="rz-pb-2">
    Each row below is a <code>Workbook</code> with a different <code>Culture</code>. The canonical
    <code>Cell.Formula</code> stays identical in every culture - only user-facing entry and display change.
    <code>Workbook.Culture</code> defaults to <code>CultureInfo.CurrentCulture</code>; set it explicitly in
    server-side code so results do not depend on the host locale.
</RadzenText>

<RadzenDataGrid Data="@rows" TItem="CultureRow" AllowPaging="false" class="rz-pb-4">
    <Columns>
        <RadzenDataGridColumn Property="@nameof(CultureRow.Culture)" Title="Culture" Width="90px" />
        <RadzenDataGridColumn Property="@nameof(CultureRow.LocalFormula)" Title="Formula as the user types it" />
        <RadzenDataGridColumn Property="@nameof(CultureRow.CanonicalFormula)" Title="Canonical Cell.Formula" />
        <RadzenDataGridColumn Property="@nameof(CultureRow.FormattedNumber)" Title="1234.5 as #,##0.00" />
        <RadzenDataGridColumn Property="@nameof(CultureRow.ParsedInput)" Title="Typing &quot;10,50&quot; produces" />
    </Columns>
</RadzenDataGrid>

@code {
    class CultureRow
    {
        public string Culture { get; set; } = string.Empty;
        public string LocalFormula { get; set; } = string.Empty;
        public string CanonicalFormula { get; set; } = string.Empty;
        public string FormattedNumber { get; set; } = string.Empty;
        public string ParsedInput { get; set; } = string.Empty;
    }

    readonly List<CultureRow> rows = [];

    protected override void OnInitialized()
    {
        foreach (var name in new[] { "en-US", "de-DE", "es-ES", "fr-FR", "it-IT", "ja-JP" })
        {
            var workbook = new Workbook { Culture = CultureInfo.GetCultureInfo(name) };
            var sheet = workbook.AddSheet("Sheet1", 5, 5);

            sheet.Cells["A1"].Value = 1000;
            sheet.Cells["A2"].Value = 234.5;

            var formulaCell = sheet.Cells["B1"];
            formulaCell.Formula = "=SUM(A1,A2)*1.5";

            var formattedCell = sheet.Cells["C1"];
            formattedCell.Value = 1234.5;
            formattedCell.Format.NumberFormat = "#,##0.00";

            var inputCell = sheet.Cells["D1"];
            inputCell.SetValue("10,50");

            rows.Add(new CultureRow
            {
                Culture = name,
                LocalFormula = formulaCell.GetValue(),
                CanonicalFormula = formulaCell.Formula,
                FormattedNumber = formattedCell.GetDisplayText(),
                ParsedInput = $"{Convert.ToString(inputCell.Value, CultureInfo.InvariantCulture)} ({inputCell.ValueType})"
            });
        }
    }
}