Подсчет ширины строки в пикселях в ячейке Excel

public FontRepresentor(Excel.Font excelFont)
{
    Name = excelFont.Name;
    Size = excelFont.Size;
    Color = new ColorRepresenter(excelFont.Color);
    Bold = excelFont.Bold;
    Italic = excelFont.Italic;
    Strike = excelFont.Strikethrough;
    Underline = GetIsUnderline(excelFont.Underline);
    Font = new System.Drawing.Font(GetFontFamily(Name), (float)Size, GetFontStyle(), GraphicsUnit.Pixel);
}
.....
private System.Drawing.FontFamily GetFontFamily(string fontName)
{
    foreach (System.Drawing.FontFamily fontFamily in System.Drawing.FontFamily.Families)
    {
        if (fontFamily.Name.Equals(fontName)) return fontFamily;
    }
    return System.Drawing.FontFamily.Families.First(ff => ff.Name.Equals("Calibri"));
}
....
private System.Drawing.FontStyle GetFontStyle()
{
    var fontStyle = FontStyle.Regular;
    if(Bold) fontStyle |= FontStyle.Bold;
    if(Italic) fontStyle |= FontStyle.Italic;
    if(Strike) fontStyle |= FontStyle.Strikeout;
    if(Underline) fontStyle |= FontStyle.Underline;
    return fontStyle;
}

public double GetTextWidth()
{
    var lineWidth = 0.0;
    //float displayDpiX = GraphicsHelpers.GetDpiX();
    float fontDpi = 72.0f;
    //float pointSize = Font.Font.SizeInPoints;
    int viewScale = 1;
    double stringWidthPx = TextSize.Width;
    //double stringWidthIn = stringWidthPx / displayDpiX;
    double stringWidthIn = stringWidthPx  / fontDpi;
    double stringWidthFt = stringWidthIn / 12.0;
    double borderInPx = 5;
    lineWidth = ((stringWidthFt * 1) + (borderInPx.ConvertPxToFt() * 2.0)) * viewScale* textKoef;
 
    if (WrapText && stringWidthPx > CellRectange.Width)
    {
        return CellRectange.Width.ConvertPxToFt();
    }
 
    return lineWidth;
}
.....
/// <summary>Получение структуры SizeF для текста в текущей ячейке
/// Получение с учетом всех свойств шрифта</summary>
public SizeF TextSize => Font.MeasureString(Text);
....
public SizeF MeasureString(string text)
{
    SizeF sizeF;
    using (Graphics g = Graphics.FromHwnd(IntPtr.Zero))
    {
        sizeF = g.MeasureString(text, Font);
    }
    return sizeF;
}

private void BtGetSizes_OnClick(object sender, RoutedEventArgs e)
{
    var fileName = @"E:\Test\SizesTest.xlsx";
    Excel.Application eXapp = new Excel.Application();
    try
    {
        Excel.Workbook wb = eXapp.Workbooks.Open(fileName);
        Excel.Worksheet ws = wb.Worksheets[1];
        Excel.Range cell = ws.Cells[1, 1];
 
        float fontDpi = 72.0f;
        float dpiX = GetDpiX();
        float dpiY = GetDpiY();
        var str = cell.Text;
        Msg($"First cell text: {str}");
        var cellWidthInPoints = cell.Width;
        var cellHeightInPoints = cell.Height;
        Msg($"Cell width in points: {cellWidthInPoints}");
        Msg($"Cell height in points: {cellHeightInPoints}");
        var cellWidthInPixels = ConvertPointToPixels(cellWidthInPoints, dpiX);
        var cellHeightInPixels = ConvertPointToPixels(cellHeightInPoints, dpiY);
        Msg($"Cell width in pixels: {cellWidthInPixels}");
        Msg($"Cell height in pixels: {cellHeightInPixels}");
        string fontName = cell.Font.Name;
        double xLfontSize = cell.Font.Size;
        Font font = new Font(GetFontFamily(fontName),(float)xLfontSize,
            GetFontStyle((bool)cell.Font.Bold,(bool)cell.Font.Italic,(bool)cell.Font.Strikethrough, false));
        float fontSize = font.Size;
        float fontSizeInPoints = font.SizeInPoints;
        Msg($"Font size: {fontSize}");
        Msg($"Font size in points: {fontSizeInPoints}");
        SizeF fontSizeF = MeasureText(str, font);
        float measureWidth = fontSizeF.Width;
        float measureHeight = fontSizeF.Height;
        Msg($"Meusare width: {measureWidth}");
        Msg($"Mesuare height: {measureHeight}");
        double textWidthInPixels = ConvertPointToPixels(measureWidth, dpiX);
        double textHeightInPixels = ConvertPointToPixels(measureHeight, dpiY);
        Msg($"Text width in pixels: {textWidthInPixels}");
        Msg($"Text height in pixels: {textHeightInPixels}");
    }
    catch (Exception exception)
    {
        MessageBox.Show(exception.Message + Environment.NewLine + exception.StackTrace);
    }
    finally
    {
        eXapp.Quit();
    }
}
 
private void Msg(string msg)
{
    TbRes.Text += msg + Environment.NewLine;
}
 
private float GetDpiX()
{
    using (Graphics g = Graphics.FromHwnd(IntPtr.Zero))
    {
        return g.DpiX;
    }
}
private float GetDpiY()
{
    using (Graphics g = Graphics.FromHwnd(IntPtr.Zero))
    {
        return g.DpiY;
    }
}
 
private double ConvertPointToPixels(double pt, float dpi )
{
    return pt * dpi / 72.0f;
}
private System.Drawing.FontFamily GetFontFamily(string fontName)
{
    foreach (System.Drawing.FontFamily fontFamily in System.Drawing.FontFamily.Families)
    {
        if (fontFamily.Name.Equals(fontName)) return fontFamily;
    }
    return System.Drawing.FontFamily.Families.First(ff => ff.Name.Equals("Calibri"));
}
private System.Drawing.FontStyle GetFontStyle(bool bold, bool italic, bool strike, bool underline)
{
    var fontStyle = System.Drawing.FontStyle.Regular;
    if (bold) fontStyle |= System.Drawing.FontStyle.Bold;
    if (italic) fontStyle |= System.Drawing.FontStyle.Italic;
    if (strike) fontStyle |= System.Drawing.FontStyle.Strikeout;
    if (underline) fontStyle |= System.Drawing.FontStyle.Underline;
    return fontStyle;
}
 
private SizeF MeasureText(string text, Font font)
{
    using (Graphics g = Graphics.FromHwnd(IntPtr.Zero))
    {
        g.PageUnit = GraphicsUnit.Point;
        return g.MeasureString(text, font);
    }
}