c# 如何调用EnumFontFamiliesEx

Question

初学c#,不清楚怎么调用这个API函数，给段代码参考下，谢谢了
画面上有个combox（Name = cmbFont），把EnumFontFamiliesEx函数返回的字体设成他的下拉选项，实现这一步就行了
可以的话麻烦加上简单的注释，再次感谢。

Answer 1

不用API,已经封装在System.Drawing.FontFamily类里了.
这个类有一个静态的GetFamilies函数.
它返回一个包含所有可用的FontFamily的数组.
接下来该咋做LZ应该知道了吧:)

Answer 2

这个只能返回系统自带的字体，我需要的字体System.Drawing.FontFamily里面没有，所有才想到用这个。
我要写一个条码打印的，装完打印驱动以后，条码字体要用Intetmec 128，在word里可以找到，但是C#那个类里没有办法取到，所以要想办法取到系统所有安装过的字体，如果有更好的解决办法也欢迎给出，谢谢楼上那位

Answer 3

是这样啊...
我这里只装了.net的SDK,查不到EnumFontFamiliesEx的原型所以写不了咯.
LZ可以参考.net Framework SDK\高级开发技术\互操作性\与非托管代码交互操作\使用非托管 DLL 函数
下的例子调用这个API.记得事先导入System.Runtime.InteropServices命名空间.不过我估计能达到你目的的效果不大,因为GDI+也是对GDI函数的封装和扩充;
System.Drawing.FontFamily.GetFamilies很可能就是这条函数的封装:)

Answer 4

我在下载频道,有个源码,可搜索下,具体代码直接贴把
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Drawing.Text;namespace GetFontsAPI
{
    public partial class Form1 : Form
    {
        #region API声明
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        public class LogFont
        {
            public int lfHeight;
            public int lfWidth;
            public int lfEscapement;
            public int lfOrientation;
            public FontWeight lfWeight;
            [MarshalAs(UnmanagedType.U1)]
            public bool lfItalic;
            [MarshalAs(UnmanagedType.U1)]
            public bool lfUnderline;
            [MarshalAs(UnmanagedType.U1)]
            public bool lfStrikeOut;
            public FontCharSet lfCharSet;
            public FontPrecision lfOutPrecision;
            public FontClipPrecision lfClipPrecision;
            public FontQuality lfQuality;
            public FontPitchAndFamily lfPitchAndFamily;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public string lfFaceName;
        }
        public enum FontWeight : int
        {
            FW_DONTCARE = 0,
            FW_THIN = 100,
            FW_EXTRALIGHT = 200,
            FW_LIGHT = 300,
            FW_NORMAL = 400,
            FW_MEDIUM = 500,
            FW_SEMIBOLD = 600,
            FW_BOLD = 700,
            FW_EXTRABOLD = 800,
            FW_HEAVY = 900,
        }
        public enum FontCharSet : byte
        {
            ANSI_CHARSET = 0,
            DEFAULT_CHARSET = 1,
            SYMBOL_CHARSET = 2,
            SHIFTJIS_CHARSET = 128,
            HANGEUL_CHARSET = 129,
            HANGUL_CHARSET = 129,
            GB2312_CHARSET = 134,
            CHINESEBIG5_CHARSET = 136,
            OEM_CHARSET = 255,
            JOHAB_CHARSET = 130,
            HEBREW_CHARSET = 177,
            ARABIC_CHARSET = 178,
            GREEK_CHARSET = 161,
            TURKISH_CHARSET = 162,
            VIETNAMESE_CHARSET = 163,
            THAI_CHARSET = 222,
            EASTEUROPE_CHARSET = 238,
            RUSSIAN_CHARSET = 204,
            MAC_CHARSET = 77,
            BALTIC_CHARSET = 186,
        }
        public enum FontPrecision : byte
        {
            OUT_DEFAULT_PRECIS = 0,
            OUT_STRING_PRECIS = 1,
            OUT_CHARACTER_PRECIS = 2,
            OUT_STROKE_PRECIS = 3,
            OUT_TT_PRECIS = 4,
            OUT_DEVICE_PRECIS = 5,
            OUT_RASTER_PRECIS = 6,
            OUT_TT_ONLY_PRECIS = 7,
            OUT_OUTLINE_PRECIS = 8,
            OUT_SCREEN_OUTLINE_PRECIS = 9,
            OUT_PS_ONLY_PRECIS = 10,
        }
        public enum FontClipPrecision : byte
        {
            CLIP_DEFAULT_PRECIS = 0,
            CLIP_CHARACTER_PRECIS = 1,
            CLIP_STROKE_PRECIS = 2,
            CLIP_MASK = 0xf,
            CLIP_LH_ANGLES = (1 << 4),
            CLIP_TT_ALWAYS = (2 << 4),
            CLIP_DFA_DISABLE = (4 << 4),
            CLIP_EMBEDDED = (8 << 4),
        }
        public enum FontQuality : byte
        {
            DEFAULT_QUALITY = 0,
            DRAFT_QUALITY = 1,
            PROOF_QUALITY = 2,
            NONANTIALIASED_QUALITY = 3,
            ANTIALIASED_QUALITY = 4,
            CLEARTYPE_QUALITY = 5,
            CLEARTYPE_NATURAL_QUALITY = 6,
        }
        [Flags]
        public enum FontPitchAndFamily : byte
        {
            DEFAULT_PITCH = 0,
            FIXED_PITCH = 1,
            VARIABLE_PITCH = 2,
            FF_DONTCARE = (0 << 4),
            FF_ROMAN = (1 << 4),
            FF_SWISS = (2 << 4),
            FF_MODERN = (3 << 4),
            FF_SCRIPT = (4 << 4),
            FF_DECORATIVE = (5 << 4),
        }        public const int LF_FACESIZE = 32;        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
        public struct EnumLogFontEx
        {
            public LogFont elfLogFont;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = LF_FACESIZE)]
            public string elfFullName;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = LF_FACESIZE)]
            public string elfStyle;
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = LF_FACESIZE)]
            public string elfScript;
        }        delegate int EnumFontExDelegate(ref EnumLogFontEx lpelfe, IntPtr lpntme, int FontType, int lParam);        [DllImport("gdi32.dll", EntryPoint = "EnumFontFamiliesEx", CharSet = CharSet.Unicode)]
        static extern int EnumFontFamiliesEx(IntPtr hDC, [In, MarshalAs(UnmanagedType.LPStruct)] LogFont logFont, EnumFontExDelegate enumFontExCallback,
            IntPtr lParam, uint dwFlags);        #endregion        public Form1()
        {
            InitializeComponent();
        }        private void Form1_Load(object sender, EventArgs e)
        {
            #region 通过API得到字体列表
            Bitmap bmp = new Bitmap(10, 10);
            Graphics g = Graphics.FromImage(bmp);            IntPtr hDC = g.GetHdc();
            LogFont logFont = new LogFont();
            logFont.lfCharSet = FontCharSet.DEFAULT_CHARSET;            //EnumFontExDelegate callbackProc = new EnumFontExDelegate(enumFontEx);
            int intResult = EnumFontFamiliesEx(hDC, logFont, enumFontEx, IntPtr.Zero, 0);
            g.ReleaseHdc(hDC);
            g.Dispose();
            bmp.Dispose();
            #endregion
            #region VS2005内置的字体列表
            InstalledFontCollection fontCollection = new InstalledFontCollection();
            foreach (FontFamily fontFamily in fontCollection.Families)
            {
                this.comboBox2.Items.Add(fontFamily.Name);
            }
            #endregion
        }
        #region 枚举字体回调函数
        int enumFontEx(ref EnumLogFontEx lpelfe, IntPtr lpntme, int FontType, int lParam)
        {
            if (this.comboBox1.Items.Contains(lpelfe.elfFullName) == false)
                this.comboBox1.Items.Add(lpelfe.elfFullName);
            return 1;
        }
        #endregion    }
}

Answer 5

非常感激zxkid及楼上各位朋友，结贴。