Win32Exception:在System.Diagnostics.ProcessManager.OpenProcess()中拒绝访问

时间:2017-04-19 05:30:55

标签: c# process system.diagnostics watchdog win32exception

首先,我是一个天真的开发人员,对这些代码没有太多深入的了解。 我在代码块中获取拒绝访问权限,该代码块试图获取其中一个应用程序的版本号。

场景:在Visual Studio中运行代码时没有问题。但是当安装文件在不同的机器上运行并且检查了日志时,它会抛出 Win32Exception :访问被拒绝。

(程序在安装后立即自动运行。实际上在安装此应用程序之前,已经安装了监视程序服务,它会自动运行应用程序并在关闭时恢复它。所以,我相信我无法将requestedExecutionLevel设置为requireAdmin,这可能会显示确认对话框并授予用户对运行应用程序的控制权。)

我需要解决这个问题。阅读一些博客后,我认为这必定是由于缺乏足够的权利来检索所需的信息。但我仍然不清楚如何解决/解决这个问题。

日志文件中的异常:

[  1,11216] 2017-04-17T11:43:53 - -------------------- Win32Exception caught --------------------
[  1,11216] 2017-04-17T11:43:53 - Access is denied
[  1,11216] 2017-04-17T11:43:53 - (Win32Err=0x00000005)
[  1,11216] 2017-04-17T11:43:53 - Stack trace is : 
[  1,11216] 2017-04-17T11:43:53 -    at System.Diagnostics.ProcessManager.OpenProcess(Int32 processId, Int32 access, Boolean throwIfExited)
   at System.Diagnostics.NtProcessManager.GetModuleInfos(Int32 processId, Boolean firstModuleOnly)
   at System.Diagnostics.NtProcessManager.GetFirstModuleInfo(Int32 processId)
   at System.Diagnostics.Process.get_MainModule()
   at IMPMDesktopClient.BaseIMClientDriver.GetVersion(UIntPtr windowUIntPtr)
   at IMPMDesktopClient.WindowDetector.Hooks.WindowsEventArgs..ctor(Int32 eventNum, UIntPtr windowHandle, Int32 idObject, Int32 idChild, String clsName, Rectangle pos)
   at IMPMDesktopClient.WindowDetector.Hooks.EventHooks.CheckForWindowOfInterest(UIntPtr hWnd, UIntPtr arg)
   at IMPMDesktopClient.WindowDetector.Hooks.EventHooks.CheckTopWindow(UIntPtr hWnd, UIntPtr arg)
   at IMPMDesktopClient.Win32Interop.EnumWindows(WndEnumCallback callback, UIntPtr param)
   at IMPMDesktopClient.WindowDetector.Hooks.EventHooks.DetectTheseWindowsNow(List`1 classes)
   at IMPMDesktopClient.WindowDetector.WindowClassManager.OnPostRegistration()
[  1,11216] 2017-04-17T11:43:53 - --------------------Win32Exception--------------------

GetVersion()的代码:

public static Version GetVersion(UIntPtr windowUIntPtr)
    {
        var noOfTrials = 2;
        var threadSleepPeriod = 1000;
        Process imProc = null;

        while (noOfTrials > 0)
        {
            try
            {
                imProc = Win32Interop.GetWindowProcess(windowUIntPtr);
                Version version;
                try
                {
                    version = GetModuleVersion(imProc.MainModule); 
                }
                catch (System.ComponentModel.Win32Exception)
                {
                    version = GetModuleVersion(imProc.Id);
                }

                // If getting version fails, retry it.
                if (version == null || (version.Major == 0 && version.Minor == 0))
                {
                    // The thread will sleep for 1s after 1st trial, 3s after 2nd trial.
                    Thread.Sleep(threadSleepPeriod);
                    noOfTrials--;
                    threadSleepPeriod += 2000;
                }
                else
                    return version;

                if (noOfTrials == 0)
                {
                    Log.Write(...);
                }
            }
            catch (Exception ex)
            {
                Log.Write(...);
            }
        }
        return new Version();
    }

1 个答案:

答案 0 :(得分:0)

一种解决方案是尝试以管理员身份运行应用程序。

您可以通过关闭visual studio,然后使用“右键单击 - >以管理员身份运行”从快捷方式打开它,然后从VS的实例打开您的解决方案

如果可行,则通过编辑应用程序清单并将<requesteExecutionLevel>更改为

,将应用程序设置为始终以管理员身份运行
<requestedExecutionLevel level="requireAdministrator" uiAccess="false" />