function fileSizeToString(size) {
    var suffix = ["B", "KB", "MB", "GB"];

    var place = Math.floor(Math.log(size) / Math.log(1024));
    var fileSize = Math.round(size / Math.pow(1024, place));

    return (fileSize + suffix[place]);
};

As you can see this is a relatively simple function, and really boils down to two lines of code. The first line

var place = Math.floor(Math.log(size) / Math.log(1024));

determines which suffix will be used. While the second line

var fileSize = Math.round(size / Math.pow(1024, place));

calculates the file size, which is typically measured in units of 1024.

In my case I only needed to support up to gigabyte file sizes, but the function could easily be modified to support larger sizes.

Happy Coding!

First Solution

This function gets the service’s name by retrieving all services registered with the SCM, and comparing their process ids to the one supplied.

public static string GetServiceNameByProcessId(uint processId)
{
    string serviceName = String.Empty;

    ManagementClass mc = new ManagementClass("Win32_Service");

    foreach (ManagementObject service in mc.GetInstances())
    {
        if ((uint)service["ProcessId"] == processId)
        {
            serviceName = (string)service["Name"];
            break;
        }
    }

    return serviceName;
}

Second Solution

This function uses WQL to query for  the specific service instance, using the process id in the WHERE clause. This avoids having to iterate over all the services within the SCM.

public static string GetServiceNameByProcessId(uint processId)
{
    string serviceName = String.Empty;

    SelectQuery query = new SelectQuery("Win32_Service", String.Format("ProcessId={0}", processId));
    ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);

    foreach (ManagementObject service in searcher.Get())
    {
        if ((uint)service["ProcessId"] == processId)
        {
            serviceName = (string)service["Name"];
            break;
        }
    }
   
    return serviceName;
}  

So, there you have it. These are the approaches that I came up with. In the future, I may present another that uses the Windows API, in particular the EnumServicesStatusEx function, to accomplish the same task. Can anyone think of other approaches or suggest changes to the ones I’ve presented?