c# - 将文件扩展名关联到 C# 应用程序中的应用程序

Question

我需要将文件扩展名关联到特定的可执行应用程序并将其值写入寄存器，所以我看到了这个教程: tutorial

所以我创建了一个新的 Wpf 应用程序，我在其中添加了这个类:

public class FileAssociation
    {
        // Associate file extension with progID, description, icon and application
        public static void Associate(string extension,
               string progID, string description, string icon, string application)
        {
            Registry.ClassesRoot.CreateSubKey(extension).SetValue("", progID);
            if (progID != null && progID.Length > 0)
                using (RegistryKey key = Registry.ClassesRoot.CreateSubKey(progID))
                {
                    if (description != null)
                        key.SetValue("", description);
                    if (icon != null)
                        key.CreateSubKey("DefaultIcon").SetValue("", ToShortPathName(icon));
                    if (application != null)
                        key.CreateSubKey(@"Shell\Open\Command").SetValue("",
                                    ToShortPathName(application) + " \"%1\"");
                }
        }

        // Return true if extension already associated in registry
        public static bool IsAssociated(string extension)
        {
            return (Registry.ClassesRoot.OpenSubKey(extension, false) != null);
        }

        [DllImport("Kernel32.dll")]
        private static extern uint GetShortPathName(string lpszLongPath,
            [Out] StringBuilder lpszShortPath, uint cchBuffer);

        // Return short path format of a file name
        private static string ToShortPathName(string longName)
        {
            StringBuilder s = new StringBuilder(1000);
            uint iSize = (uint)s.Capacity;
            uint iRet = GetShortPathName(longName, s, iSize);
            return s.ToString();
        }
    }

然后，我将图标图像添加到项目的根目录，并放置了这个片段:

  if (!FileAssociation.IsAssociated(".akp"))
                FileAssociation.Associate(".akp", "ClassID.ProgID", "akp File", "akeo.ico", @"C:\Users\Lamloumi\Desktop\MyWork\C#\App - SuiteTool\bin\x64\Debug\App - SuiteTool.exe");

但是我在这一行遇到了问题

Registry.ClassesRoot.CreateSubKey(extension).SetValue("", progID);

所以我需要知道

1. 问题是什么，即为什么这段代码不起作用？
2. 我该如何解决？

谢谢，

Answer 1

似乎您没有足够的权限写入 Windows 注册表 尝试将内容添加到项目 app.manifest 文件中:

<?xml version="1.0" encoding="utf-8"?>
<asmv1:assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1" xmlns:asmv1="urn:schemas-microsoft-com:asm.v1" xmlns:asmv2="urn:schemas-microsoft-com:asm.v2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
      <trustInfo xmlns="urn:schemas-microsoft-com:asm.v2">
        <security>
          <requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3">
            <requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
          </requestedPrivileges>
        </security>
      </trustInfo>
</asmv1:assembly>

或者如果应用程序必须在每次启动时不请求管理员权限的情况下工作，请添加 self 提升的能力，如本例所示 UAC self-elevation