How to Use Xpath Function in a Xpathexpression Instance Programatically

How to install a Font programmatically (C#)

As you mentioned, you can launch other executables to install TrueType Fonts for you. I don't know your specific use cases but I'll run down the methods I know of and maybe one will be of use to you.

Windows has a built-in utility called fontview.exe, which you can invoke simply by calling Process.Start("Path\to\file.ttf") on any valid TrueType Font... assuming default file associations. This is akin to launching it manually from Windows Explorer. The advantage here is it's really trivial, but it still requires user interaction per font to install. As far as I know there is no way to invoke the "Install" portion of this process as an argument, but even if there was you'd still have to elevate permissions and battle UAC.

The more intriguing option is a utility called FontReg that replaces the deprecated fontinst.exe that was included on older versions of Windows. FontReg enables you to programatically install an entire directory of Fonts by invoking the executable with the /copy switch:

    var info = new ProcessStartInfo()
        {
            FileName = "Path\to\FontReg.exe",
            Arguments = "/copy",
            UseShellExecute = false,
            WindowStyle = ProcessWindowStyle.Hidden

        };

   Process.Start(info);

Note that the Fonts have to be in the root of wherever FontReg.exe is located. You'll also have to have administrator privileges. If you need your Font installations to be completely transparent, I would suggest launching your application with elevated permissions and approve of the UAC up front, that way when you spawn your child processes you wont need user approval Permissions stuff

How to install a windows font using C#

You'll need a different approach installing fonts.

• Use an installer (create a setup project) to install the fonts
• Another (more easy) approach using a native method.

Declare the dll import:

    [DllImport("gdi32.dll", EntryPoint="AddFontResourceW", SetLastError=true)]
    public static extern int AddFontResource(
        [In][MarshalAs(UnmanagedType.LPWStr)]
        string lpFileName);

In your code:

    // Try install the font.
    result = AddFontResource(@"C:\MY_FONT_LOCATION\MY_NEW_FONT.TTF");
    error = Marshal.GetLastWin32Error();

The source:

http://www.brutaldev.com/post/2009/03/26/Installing-and-removing-fonts-using-C

I put it together in a unit test, I hope that helps:

[TestFixture]
public class Tests
{
    // Declaring a dll import is nothing more than copy/pasting the next method declaration in your code. 
    // You can call the method from your own code, that way you can call native 
    // methods, in this case, install a font into windows.
    [DllImport("gdi32.dll", EntryPoint = "AddFontResourceW", SetLastError = true)]
    public static extern int AddFontResource([In][MarshalAs(UnmanagedType.LPWStr)]
                                     string lpFileName);

    // This is a unit test sample, which just executes the native method and shows
    // you how to handle the result and get a potential error.
    [Test]
    public void InstallFont()
    {
        // Try install the font.
        var result = AddFontResource(@"C:\MY_FONT_LOCATION\MY_NEW_FONT.TTF");
        var error = Marshal.GetLastWin32Error();
        if (error != 0)
        {
            Console.WriteLine(new Win32Exception(error).Message);
        }
    }
}

That should help you on your way :)

How to install new font on user's PC programmatically using C# Winfows Form Application?

You can try with this code base on AddFontResource

[DllImport("gdi32.dll", EntryPoint="AddFontResourceW", SetLastError=true)]
public static extern int AddFontResource([In][MarshalAs(UnmanagedType.LPWStr)]
                                         string lpFileName);

Code

      //Install the font.
      result = AddFontResource(@"C:\MY_FONT_LOCATION\MY_NEW_FONT.TTF");
      error = Marshal.GetLastWin32Error();
      if (error != 0)
      {
        Console.WriteLine(new Win32Exception(error).Message);
      }
      else
      {
        Console.WriteLine((result == 0) ? "Font is already installed." :
                                          "Font installed successfully.");
      }

Add fonts by CMD and C#

As this question and answer in Microsoft site you can do that by copying te font file in Font folder and add that to registry as blow:

File.Copy("BKoodakO.ttf", Path.Combine(GetFolderPath(SpecialFolder.Windows), "Fonts", "BKoodakO.ttf"),true);
Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.LocalMachine.CreateSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts");
key.SetValue("describtion for BKoodakO", "BKoodakO.ttf");
key.Close();

This code copy one file and if you have more file in a folder Get the font file in folder and then copy one by one. I test this way and it work fine. if you have question please comment answer. Note that the output must Run as administrator.

Another way that use Windows dll to do that is:

        [DllImport("gdi32", EntryPoint = "AddFontResource")]
        public static extern int AddFontResourceA(string lpFileName);
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        private static extern int AddFontResource(string lpszFilename);
        [System.Runtime.InteropServices.DllImport("gdi32.dll")]
        private static extern int CreateScalableFontResource(uint fdwHidden, string
        lpszFontRes, string lpszFontFile, string lpszCurrentPath);

        /// <summary>
        /// Installs font on the user's system and adds it to the registry so it's available on the next session
        /// Your font must be included in your project with its build path set to 'Content' and its Copy property
        /// set to 'Copy Always'
        /// </summary>
        /// <param name="contentFontName">Your font to be passed as a resource (i.e. "myfont.tff")</param>
        private static void RegisterFont(string contentFontName)
        {
            // Creates the full path where your font will be installed
            var fontDestination = Path.Combine(System.Environment.GetFolderPath
                                              (System.Environment.SpecialFolder.Fonts), contentFontName);

            if (!File.Exists(fontDestination))
            {
                // Copies font to destination
                System.IO.File.Copy(Path.Combine(System.IO.Directory.GetCurrentDirectory(), contentFontName), fontDestination);

                // Retrieves font name
                // Makes sure you reference System.Drawing
                PrivateFontCollection fontCol = new PrivateFontCollection();
                fontCol.AddFontFile(fontDestination);
                var actualFontName = fontCol.Families[0].Name;

                //Add font
                AddFontResource(fontDestination);
                //Add registry entry  
                Registry.SetValue(@"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts",
                actualFontName, contentFontName, RegistryValueKind.String);
            }
        }

Installing a font on a client machine

In VS2005 (so I assume 2008 as well), right click on the File System on Target Machine, Add Special Folder -> Fonts Folder, then place your font file there.

Do I need to install missing fonts on client machine for Windows application

Try this -

(while creating setup)right click on the File System on Target Machine, Add Special Folder -> give that folder name "Fonts" Folder, then place your font file there.

it will place your fonts in client system where fonts are installed i.e. C:\Windows\Fonts folder of client machine.Yes this is done manually while making setup. check this link once

Installing and using a specific font in a winform

In the diagram font is added programatically but you don't need to do that, you can also add font manually, just put the font in that special folder.

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