Question

我编写了一个编辑特定文件类型的程序，我想让用户在启动时将我的应用程序设置为此文件类型的默认编辑器（因为我不需要安装程序）。

我尝试编写一个可重用的方法，通过向HKEY_CLASSES_ROOT添加密钥，并将其与我的应用程序一起使用，为我关联文件（最好是在任何操作系统上，虽然我正在运行Vista），但是它似乎不起作用。

public static void SetAssociation(string Extension, string KeyName, string OpenWith, string FileDescription)
{
    RegistryKey BaseKey;
    RegistryKey OpenMethod;
    RegistryKey Shell;
    RegistryKey CurrentUser;

    BaseKey = Registry.ClassesRoot.CreateSubKey(Extension);
    BaseKey.SetValue("", KeyName);

    OpenMethod = Registry.ClassesRoot.CreateSubKey(KeyName);
    OpenMethod.SetValue("", FileDescription);
    OpenMethod.CreateSubKey("DefaultIcon").SetValue("", "\"" + OpenWith + "\",0");
    Shell = OpenMethod.CreateSubKey("Shell");
    Shell.CreateSubKey("edit").CreateSubKey("command").SetValue("", "\"" + OpenWith + "\"" + " \"%1\"");
    Shell.CreateSubKey("open").CreateSubKey("command").SetValue("", "\"" + OpenWith + "\"" + " \"%1\"");
    BaseKey.Close();
    OpenMethod.Close();
    Shell.Close();

    CurrentUser = Registry.CurrentUser.CreateSubKey(@"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\" + Extension);
    CurrentUser = CurrentUser.OpenSubKey("UserChoice", RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.FullControl);
    CurrentUser.SetValue("Progid", KeyName, RegistryValueKind.String);
    CurrentUser.Close();
}

知道为什么它不起作用？示例用法可能是

SetAssociation(".ucs", "UCS_Editor_File", Application.ExecutablePath, "UCS File");

如果我使用regedit执行相同的操作，那么使用“CurrentUser”的方法部分似乎有效，但使用我的应用程序却没有。

Answer 1

答案比我想象的要简单得多。 Windows资源管理器有自己的打开应用程序覆盖，我试图在最后几行代码中修改它。如果您只是删除资源管理器覆盖，那么文件关联将起作用。

我还告诉探险家我通过调用非托管函数SHChangeNotify()

更改了文件关联

public static void SetAssociation(string Extension, string KeyName, string OpenWith, string FileDescription)
{
    // The stuff that was above here is basically the same

    // Delete the key instead of trying to change it
    CurrentUser = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts\\" + Extension, true);
    CurrentUser.DeleteSubKey("UserChoice", false);
    CurrentUser.Close();

    // Tell explorer the file association has been changed
    SHChangeNotify(0x08000000, 0x0000, IntPtr.Zero, IntPtr.Zero);
}

[DllImport("shell32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern void SHChangeNotify(uint wEventId, uint uFlags, IntPtr dwItem1, IntPtr dwItem2);

Answer 2

这是一个完整的例子：

public class FileAssociation
{
    public string Extension { get; set; }
    public string ProgId { get; set; }
    public string FileTypeDescription { get; set; }
    public string ExecutableFilePath { get; set; }
}

public class FileAssociations
{
    // needed so that Explorer windows get refreshed after the registry is updated
    [System.Runtime.InteropServices.DllImport("Shell32.dll")]
    private static extern int SHChangeNotify(int eventId, int flags, IntPtr item1, IntPtr item2);

    private const int SHCNE_ASSOCCHANGED = 0x8000000;
    private const int SHCNF_FLUSH = 0x1000;

    public static void EnsureAssociationsSet()
    {
        var filePath = Process.GetCurrentProcess().MainModule.FileName;
        EnsureAssociationsSet(
            new FileAssociation
            {
                Extension = ".ucs",
                ProgId = "UCS_Editor_File",
                FileTypeDescription = "UCS File",
                ExecutableFilePath = filePath
            });
    }

    public static void EnsureAssociationsSet(params FileAssociation[] associations)
    {
        bool madeChanges = false;
        foreach (var association in associations)
        {
            madeChanges |= SetAssociation(
                association.Extension,
                association.ProgId,
                association.FileTypeDescription,
                association.ExecutableFilePath);
        }

        if (madeChanges)
        {
            SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_FLUSH, IntPtr.Zero, IntPtr.Zero);
        }
    }

    public static bool SetAssociation(string extension, string progId, string fileTypeDescription, string applicationFilePath)
    {
        bool madeChanges = false;
        madeChanges |= SetKeyDefaultValue(@"Software\Classes\" + extension, progId);
        madeChanges |= SetKeyDefaultValue(@"Software\Classes\" + progId, fileTypeDescription);
        madeChanges |= SetKeyDefaultValue($@"Software\Classes\{progId}\shell\open\command", "\"" + applicationFilePath + "\" \"%1\"");
        return madeChanges;
    }

    private static bool SetKeyDefaultValue(string keyPath, string value)
    {
        using (var key = Registry.CurrentUser.CreateSubKey(keyPath))
        {
            if (key.GetValue(null) as string != value)
            {
                key.SetValue(null, value);
                return true;
            }
        }

        return false;
    }

Answer 3

您可以使用托管方式via ClickOnce执行此操作。不要自己乱用注册表。这可以通过VS2008及更高版本（包括Express）上的工具（即没有xml）在Project Properties =＆gt;上获得。 Publish =＆gt;选项=＆gt;文件关联

Answer 4

如果您将密钥写入HKEY_CURRENT_USER\Software\Classes而不是HKEY_CLASSES_ROOT，则在Vista及更高版本下，这应该没有管理员权限。

Answer 5

上面的解决方案对我来说对Windows 10无效。这是我的解决方案，用于为当前用户打开带有％localappdata％\ MyApp \ MyApp.exe的扩展名为.myExt的文件。阅读评论后进行了优化。

 String App_Exe = "MyApp.exe";
 String App_Path = "%localappdata%";
 SetAssociation_User("myExt", App_Path + App_Exe, App_Exe);

 public static void SetAssociation_User(string Extension, string OpenWith, string ExecutableName)
 {
    try {
                using (RegistryKey User_Classes = Registry.CurrentUser.OpenSubKey("SOFTWARE\\Classes\\", true))
                using (RegistryKey User_Ext = User_Classes.CreateSubKey("." + Extension))
                using (RegistryKey User_AutoFile = User_Classes.CreateSubKey(Extension + "_auto_file"))
                using (RegistryKey User_AutoFile_Command = User_AutoFile.CreateSubKey("shell").CreateSubKey("open").CreateSubKey("command"))
                using (RegistryKey ApplicationAssociationToasts = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\ApplicationAssociationToasts\\", true))
                using (RegistryKey User_Classes_Applications = User_Classes.CreateSubKey("Applications"))
                using (RegistryKey User_Classes_Applications_Exe = User_Classes_Applications.CreateSubKey(ExecutableName))
                using (RegistryKey User_Application_Command = User_Classes_Applications_Exe.CreateSubKey("shell").CreateSubKey("open").CreateSubKey("command"))
                using (RegistryKey User_Explorer = Registry.CurrentUser.CreateSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\FileExts\\." + Extension))
                using (RegistryKey User_Choice = User_Explorer.OpenSubKey("UserChoice"))
                {
                    User_Ext.SetValue("", Extension + "_auto_file", RegistryValueKind.String);
                    User_Classes.SetValue("", Extension + "_auto_file", RegistryValueKind.String);
                    User_Classes.CreateSubKey(Extension + "_auto_file");
                    User_AutoFile_Command.SetValue("", "\"" + OpenWith + "\"" + " \"%1\"");
                    ApplicationAssociationToasts.SetValue(Extension + "_auto_file_." + Extension, 0);
                    ApplicationAssociationToasts.SetValue(@"Applications\" + ExecutableName + "_." + Extension, 0);
                    User_Application_Command.SetValue("", "\"" + OpenWith + "\"" + " \"%1\"");
                    User_Explorer.CreateSubKey("OpenWithList").SetValue("a", ExecutableName);
                    User_Explorer.CreateSubKey("OpenWithProgids").SetValue(Extension + "_auto_file", "0");
                    if (User_Choice != null) User_Explorer.DeleteSubKey("UserChoice");
                    User_Explorer.CreateSubKey("UserChoice").SetValue("ProgId", @"Applications\" + ExecutableName);
                }
                SHChangeNotify(0x08000000, 0x0000, IntPtr.Zero, IntPtr.Zero);
            }
            catch (Exception excpt)
            {
                //Your code here
            }
        }

  [DllImport("shell32.dll", CharSet = CharSet.Auto, SetLastError = true)]
  public static extern void SHChangeNotify(uint wEventId, uint uFlags, IntPtr dwItem1, IntPtr dwItem2);

Answer 6

如果您使用的是Visual Studio 2015，请安装设置和部署扩展。创建安装向导，然后将.exe文件附加到它。右键单击解决方案资源管理器中的主程序转到-view，-file类型，然后右键单击文件类型并选择添加新文件类型。根据需要更改所有属性，然后构建MSI安装程序。

注意：我重新阅读了您的问题并意识到您不想要安装程序。很抱歉，虽然你应该考虑使用它，因为它可以为你的程序提供更多的自定义。

Answer 7

您使用的是旧版Visual Studio，Vista会将您的程序视为“遗留”Windows应用程序。并重定向注册表写入你。在您的计划中加入a manifest，这样您就可以了解Vista。此清单自动包含在VS2008及更高版本中。

请注意，这仍然无法解决您的用户的问题，她不太可能在关闭UAC的情况下运行您的应用。您需要编写一个单独的应用程序，其中清单已链接并要求管理员权限。它需要将requestedExecutionLevel设置为requireAdministrator的清单。

Answer 8

将文件扩展名与自己的程序关联的实际方法：

using Microsoft.Win32;
using System;
using System.IO;
using System.Runtime.InteropServices;

private static void RegisterForFileExtension(string extension, string applicationPath)
    {
        RegistryKey FileReg = Registry.CurrentUser.CreateSubKey("Software\\Classes\\" + extension);
        FileReg.CreateSubKey("shell\\open\\command").SetValue("", applicationPath + " %1");
        FileReg.Close();

        SHChangeNotify(0x08000000, 0x0000, IntPtr.Zero, IntPtr.Zero);
    }
[DllImport("shell32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern void SHChangeNotify(uint wEventId, uint uFlags, IntPtr dwItem1, IntPtr dwItem2);

Answer 9

线

FileReg.CreateSubKey（“ shell \ open \ command”）。SetValue（“”，applicationPath +“％1”）;

应修改为

FileReg.CreateSubKey（“ shell \ open \ command”）。SetValue（“”，$“ \” {applicationPath} \“ \”％1 \“”）;

如果您不希望路径中的空格出现问题，

C：\我的文件夹\我的file.txt

将文件扩展名与应用程序关联

9 个答案: