using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace Lskj.Util
{
    public class FontHelper
    {
        [DllImport("kernel32.dll", SetLastError = true)]
        private static extern int WriteProfileString(string lpszSection, string lpszKeyName, string lpszString);
        [DllImport("gdi32")]
        private static extern int AddFontResource(string lpFileName);
        /// <summary>
        /// 安装字体
        /// </summary>
        /// <param name="fontFilePath">字体文件全路径</param>
        /// <returns>是否成功安装字体</returns>
        /// <exception cref="UnauthorizedAccessException">不是管理员运行程序</exception>
        /// <exception cref="Exception">字体安装失败</exception>
        public static bool InstallFont(string fontFilePath)
        {
            try
            {
                System.Security.Principal.WindowsIdentity identity = System.Security.Principal.WindowsIdentity.GetCurrent();
                System.Security.Principal.WindowsPrincipal principal = new System.Security.Principal.WindowsPrincipal(identity);
                //判断当前登录用户是否为管理员
                if (principal.IsInRole(System.Security.Principal.WindowsBuiltInRole.Administrator) == false)
                {
                    return false;
                }
                //获取Windows字体文件夹路径
                string fontPath = Path.Combine(System.Environment.GetEnvironmentVariable("WINDIR"), "fonts", Path.GetFileName(fontFilePath));
                //检测系统是否已安装该字体
                if (!File.Exists(fontPath))
                {
                    // File.Copy(System.Windows.Forms.Application.StartupPath + "\\font\\" + FontFileName, FontPath); //font是程序目录下放字体的文件夹
                    //将某路径下的字体拷贝到系统字体文件夹下
                    File.Copy(fontFilePath, fontPath); //font是程序目录下放字体的文件夹
                    AddFontResource(fontPath);

                    //Res = SendMessage(HWND_BROADCAST, WM_FONTCHANGE, 0, 0); 
                    //WIN7下编译会出错，不清楚什么问题。注释就行了。  
                    //安装字体
                    WriteProfileString("fonts", Path.GetFileNameWithoutExtension(fontFilePath) + "(TrueType)", Path.GetFileName(fontFilePath));
                }
            }
            catch (Exception)
            {
                return false;
            }
            return true;
        }
    }
}