有没有一种方法可以执行 progid 动词的命令，而无需在注册表中挖掘并进行字符串操作？
使用 ShObjIdl.idl 我可以运行以下命令来获取默认浏览器的 ProgId：
var reg = new ShellObjects.ApplicationAssociationRegistration();
string progID;
reg.QueryCurrentDefault("http", ShellObjects.ASSOCIATIONTYPE.AT_URLPROTOCOL, ShellObjects.ASSOCIATIONLEVEL.AL_EFFECTIVE, out progID);
这给了我“ChromeHTML.FHXQEQDDJYXVQSFWM2SVMV5GNA”。在注册表中，我可以看到这个 progid 具有以下 shell/open/command：
"C:\Users\Paul\AppData\Local\Google\Chrome\Application\chrome.exe" -- "%1"
是否有一个 API 可以将 ProgId 以及动词和参数传递给它并运行它？
我走的一条路线是使用 ShellExecuteEx：
var shellExecuteInfo = new SHELLEXECUTEINFO();
shellExecuteInfo.cbSize = Marshal.SizeOf(shellExecuteInfo);
shellExecuteInfo.fMask = SEE_MASK_CLASSNAME;
shellExecuteInfo.hwnd = IntPtr.Zero;
shellExecuteInfo.lpVerb = "open";
shellExecuteInfo.lpFile = "google.com";
shellExecuteInfo.nShow = SW_SHOWNORMAL;
shellExecuteInfo.lpClass = "http";
ShellExecuteEx(ref shellExecuteInfo);
但是，由于 Window 正在检查 lpFile，因此失败并出现“Windows 找不到”错误，我不想发生这种情况，因为它与 URL 无关（来自：http: //blogs.msdn.com/b/ oldnewthing/archive/2010/07/01/10033224.aspx）
这是我想出的解决方案：
private static void Main(string[] args)
{
if (!OpenUrlInDefaultBrowser("google.com"))
Console.WriteLine("An error happened");
}
[DllImport("Shlwapi.dll")]
private static extern int AssocQueryString(ASSOCF flags, ASSOCSTR str, string pszAssoc, string pszExtra, StringBuilder pszOut, ref uint pcchOut);
private enum ASSOCF
{
ASSOCF_NONE = 0x00000000
}
private enum ASSOCSTR
{
ASSOCSTR_COMMAND = 1
}
[DllImport("Shell32.dll", CharSet=CharSet.Auto)]
private static extern int SHEvaluateSystemCommandTemplate(string pszCmdTemplate, out string ppszApplication, out string ppszCommandLine, out string ppszParameters);
private static bool OpenUrlInDefaultBrowser(string url)
{
string browserProgId;
if (!GetDefaultBrowserProgId(out browserProgId))
return false;
string browserCommandTemplate;
if (!GetCommandTemplate(browserProgId, out browserCommandTemplate))
return false;
string browserExecutable;
string parameters;
if (!EvaluateCommandTemplate(browserCommandTemplate, out browserExecutable, out parameters))
return false;
parameters = ReplaceSubstitutionParameters(parameters, url);
try
{
Process.Start(browserExecutable, parameters);
}
catch (InvalidOperationException) { return false; }
catch (Win32Exception) { return false; }
catch (FileNotFoundException) { return false; }
return true;
}
private static bool GetDefaultBrowserProgId(out string defaultBrowserProgId)
{
try
{
// midl "C:\Program Files (x86)\Windows Kits\8.0\Include\um\ShObjIdl.idl"
// tlbimp ShObjIdl.tlb
var applicationAssociationRegistration = new ApplicationAssociationRegistration();
applicationAssociationRegistration.QueryCurrentDefault("http", ShellObjects.ASSOCIATIONTYPE.AT_URLPROTOCOL, ShellObjects.ASSOCIATIONLEVEL.AL_EFFECTIVE, out defaultBrowserProgId);
}
catch (COMException)
{
defaultBrowserProgId = null;
return false;
}
return !string.IsNullOrEmpty(defaultBrowserProgId);
}
private static bool GetCommandTemplate(string defaultBrowserProgId, out string commandTemplate)
{
var commandTemplateBufferSize = 0U;
AssocQueryString(ASSOCF.ASSOCF_NONE, ASSOCSTR.ASSOCSTR_COMMAND, defaultBrowserProgId, "open", null, ref commandTemplateBufferSize);
var commandTemplateStringBuilder = new StringBuilder((int)commandTemplateBufferSize);
var hresult = AssocQueryString(ASSOCF.ASSOCF_NONE, ASSOCSTR.ASSOCSTR_COMMAND, defaultBrowserProgId, "open", commandTemplateStringBuilder, ref commandTemplateBufferSize);
commandTemplate = commandTemplateStringBuilder.ToString();
return hresult == 0 && !string.IsNullOrEmpty(commandTemplate);
}
private static bool EvaluateCommandTemplate(string commandTemplate, out string application, out string parameters)
{
string commandLine;
var hresult = SHEvaluateSystemCommandTemplate(commandTemplate, out application, out commandLine, out parameters);
return hresult == 0 && !string.IsNullOrEmpty(application) && !string.IsNullOrEmpty(parameters);
}
private static string ReplaceSubstitutionParameters(string parameters, string replacement)
{
// Not perfect but good enough for this purpose
return parameters.Replace("%L", replacement)
.Replace("%l", replacement)
.Replace("%1", replacement);
}