标签未使用自定义字体

我正在使用以下代码加载嵌入字体：

PrivateFontCollection pfc = new PrivateFontCollection(); //declared outside this function
using (Stream fontStream = GetType().Assembly.GetManifestResourceStream("NucWar.BSOD_Font.ttf"))
{
    if (null == fontStream)
    {
        return;
    }
    int fontStreamLength = (int)fontStream.Length;
    IntPtr data = Marshal.AllocCoTaskMem(fontStreamLength);
    byte[] fontData = new byte[fontStreamLength];
    fontStream.Read(fontData, 0, fontStreamLength);
    Marshal.Copy(fontData, 0, data, fontStreamLength);
    pfc.AddMemoryFont(data, fontStreamLength);
    Marshal.FreeCoTaskMem(data);
}

这很好用。如果我在最后抛出一个断点，我可以看到字体已成功加载。如果我连接Paint事件，并使用它：

bool bold = false;
bool italic = false;
e.Graphics.PageUnit = GraphicsUnit.Point;
using (SolidBrush b = new SolidBrush(Color.Black))
{
    int y = 5;
    foreach (FontFamily fontFamily in pfc.Families)
    {
        if (fontFamily.IsStyleAvailable(FontStyle.Regular))
        {
            using (Font font = new Font(fontFamily, 32, FontStyle.Regular))
            {
                e.Graphics.DrawString(font.Name, font, b, 5, y, StringFormat.GenericTypographic);
            }
            y += 40;
        }
        if (fontFamily.IsStyleAvailable(FontStyle.Bold))
        {
            bold = true;
            using (Font font = new Font(fontFamily, 32, FontStyle.Bold))
            {
                e.Graphics.DrawString(font.Name, font, b, 5, y, StringFormat.GenericTypographic);
            }
            y += 40;
        }
        if (fontFamily.IsStyleAvailable(FontStyle.Italic))
        {
            italic = true;
            using (Font font = new Font(fontFamily, 32, FontStyle.Italic))
            {
                e.Graphics.DrawString(font.Name, font, b, 5, y, StringFormat.GenericTypographic);
            }
            y += 40;
        }
        if (bold && italic)
        {
            using (Font font = new Font(fontFamily, 32, FontStyle.Bold | FontStyle.Italic))
            {
                e.Graphics.DrawString(font.Name, font, b, 5, y, StringFormat.GenericTypographic);
            }
            y += 40;
        }
        using (Font font = new Font(fontFamily, 32, FontStyle.Underline))
        {
            e.Graphics.DrawString(font.Name, font, b, 5, y, StringFormat.GenericTypographic);
            y += 40;
        }
        using (Font font = new Font(fontFamily, 32, FontStyle.Strikeout))
        {
            e.Graphics.DrawString(font.Name, font, b, 5, y, StringFormat.GenericTypographic);
        }
    }
}

这也很好用，字体在表单上绘制了 5 次。

所以我在使用这个函数时发现它非常混乱：

//Yes, pts is a valid size. eg 16, 20, 22, 30
private void AdjustFontSize(float pts)
{
    int count = 0;
    //_yPos is a dict<string, int> that contains the Name of each Label control, and its original Y position
    // Therefore, Keys contains the Name prop of each label
    foreach (var lbl in _yPos.Keys)                                 
    {
        var con = Controls[lbl] as Label; //Current label
        FontFamily f = pfc.Families[0]; //Get the font out of pfc. Debugging confirms that f is not null and has a font in it.
        //Why this no work? It works fine if I use a built in font, like "Times"
        con.Font = new Font(f, pts, FontStyle.Regular); 
        //Messing with the location prop, still working on it. Probably not important
        con.Location = new Point(con.Location.X, (int) (_yPos[lbl] + Math.Pow(1.15, (int) pts)*count++)); 
    }
}

标签字体更改为 Arial，而不是我想要的字体。真正困扰我的是，如果我将con.Font = ...更改为使用"Times"而不是f它会正确更改为 Times 字体。最重要的是，我知道字体已正确加载，因为表单绘制正确。按照这个逻辑，我正在正确更改字体，并且我正在正确加载字体，因此它应该可以工作。