如何在我的網站上使用PDFsharp中的字體？

Question

我只是在Azure WebApplication網站上使用Arial字體但是當我到達這一行時：

MainFont = new XFont("Arial", FontSize);

它拋出異常讀取： Font data could not retrieved.

我本以為Arial會安裝在服務器上......我也嘗試將它改為Sans-Serif以匹配微軟生成的網站的默認字體......但它仍然失敗。

我也嘗試將Arial.ttf添加到項目中，但這沒有用。

Answer 1

感謝指點@PDFSharp Team。 這是我對PdfSharp 1.5 beta3b的實現：

將您想要的字體添加到項目中 - 在我的示例中，我將Arial放在MyProject\\fonts\\arial\\arial.ttf等中。將每個字體文件設置為嵌入式資源（屬性 - >構建操作）。

使用靜態調用僅應用字體解析器一次，如下所示：

MyFontResolver.Apply(); // Ensures it's only applied once

這是字體解析器類：

class MyFontResolver : IFontResolver
{
    public FontResolverInfo ResolveTypeface(string familyName, bool isBold, bool isItalic)
    {
        // Ignore case of font names.
        var name = familyName.ToLower().TrimEnd('#');

        // Deal with the fonts we know.
        switch (name)
        {
            case "arial":
                if (isBold)
                {
                    if (isItalic)
                        return new FontResolverInfo("Arial#bi");
                    return new FontResolverInfo("Arial#b");
                }
                if (isItalic)
                    return new FontResolverInfo("Arial#i");
                return new FontResolverInfo("Arial#");
        }

        // We pass all other font requests to the default handler.
        // When running on a web server without sufficient permission, you can return a default font at this stage.
        return PlatformFontResolver.ResolveTypeface(familyName, isBold, isItalic);
    }

    /// <summary>
    /// Return the font data for the fonts.
    /// </summary>
    public byte[] GetFont(string faceName)
    {
        switch (faceName)
        {
            case "Arial#":
                return FontHelper.Arial;

            case "Arial#b":
                return FontHelper.ArialBold;

            case "Arial#i":
                return FontHelper.ArialItalic;

            case "Arial#bi":
                return FontHelper.ArialBoldItalic;
        }

        return null;
    }


    internal static MyFontResolver OurGlobalFontResolver = null;

    /// <summary>
    /// Ensure the font resolver is only applied once (or an exception is thrown)
    /// </summary>
    internal static void Apply()
    {
        if (OurGlobalFontResolver == null || GlobalFontSettings.FontResolver == null)
        {
            if (OurGlobalFontResolver == null)
                OurGlobalFontResolver = new MyFontResolver();

            GlobalFontSettings.FontResolver = OurGlobalFontResolver;
        }
    }
}


/// <summary>
/// Helper class that reads font data from embedded resources.
/// </summary>
public static class FontHelper
{
    public static byte[] Arial
    {
        get { return LoadFontData("MyProject.fonts.arial.arial.ttf"); }
    }

    public static byte[] ArialBold
    {
        get { return LoadFontData("MyProject.fonts.arial.arialbd.ttf"); }
    }

    public static byte[] ArialItalic
    {
        get { return LoadFontData("MyProject.fonts.arial.ariali.ttf"); }
    }

    public static byte[] ArialBoldItalic
    {
        get { return LoadFontData("MyProject.fonts.arial.arialbi.ttf"); }
    }

    /// <summary>
    /// Returns the specified font from an embedded resource.
    /// </summary>
    static byte[] LoadFontData(string name)
    {
        var assembly = Assembly.GetExecutingAssembly();

        // Test code to find the names of embedded fonts
        //var ourResources = assembly.GetManifestResourceNames();

        using (Stream stream = assembly.GetManifestResourceStream(name))
        {
            if (stream == null)
                throw new ArgumentException("No resource with name " + name);

            int count = (int)stream.Length;
            byte[] data = new byte[count];
            stream.Read(data, 0, count);
            return data;
        }
    }
}

這是一個基於這兩個幾乎相同的帖子的單一，完整和工作類： 這個博客和這個論壇 。

Answer 2

使用最新版本的PDFsharp（目前為1.50 beta 3）並實現IFontResolver。

也可以看看：
https://stackoverflow.com/a/32489271/162529
https://stackoverflow.com/a/29059207/162529

字體可能安裝在服務器上，但PDFsharp無法讀取它。