c# - Win32 异常 : "Access is denied" when trying to execute LINQ query over Process. GetProcesses()

Question

我正在尝试执行以下代码以按优先级对正在运行的进程进行分组，但在 linq 查询的 group by 子句中出现 Win32 异常(“访问被拒绝”)。我以管理员权限在 VS2010 中运行了这段代码。

var processesList = Process.GetProcesses();
var processQuerySet = from process in processesList
                      group process by process.PriorityClass into priorityGroup
                      select priorityGroup;           
foreach (var priority in processQuerySet)
{
    Console.WriteLine(priority.Key.ToString());
    foreach (var process in priority)
    {
        Console.WriteLine("\t{0}   {1}", process.ProcessName, process.WorkingSet64);
    }
}

Answer 1

您不能访问所有进程的 PriorityClass。我会写

ProcessPriorityClass GetPriority(Process p)
{
    try{
        return p.PriorityClass;
    }catch{
        return (ProcessPriorityClass)0;
    }
}

并将其命名为

group process by GetPriority(process) into priorityGroup