HomeController.cs

[HttpPost]
public string GetTableFromController(Table model)
{
    byte[] data;

    using (TXTextControl.ServerTextControl tx =
        new TXTextControl.ServerTextControl())
    {
        tx.Create();
        tx.Tables.Add(model.Rows, model.Columns);

        tx.Save(out data, TXTextControl.BinaryStreamType.InternalUnicodeFormat);
    }

    return Convert.ToBase64String(data);
}