Windows service and Win32_DiskQuota

Question

Hi,
I want get the actual quota's assigned to a user account.
The code is as follows.

public class QuotaInformation
{
public String DiskSpaceUsed;
public String Limit;
public String QuotaVolume;
public String User;
}
.
.
.
void GetQuotaInformation()
{
ManagementObjectSearcher searcher = new ManagementObjectSearcher(@"\root\cimv2",
"SELECT DiskSpaceUsed, Limit, QuotaVolume, User FROM Win32_DiskQuota");

foreach (ManagementObject queryObj in searcher.Get())
{
Console.WriteLine("Disk Space Used: " + queryObj["DiskSpaceUsed"].ToString());
Console.WriteLine("Limit: " + queryObj["Limit"].ToString());
Console.WriteLine("QuotaVolume:" + queryObj["QuotaVolume"].ToString());
Console.WriteLine("User: " + queryObj["User"].ToString());

QuotaInformation quotaInfo = new QuotaInformation();
quotaInfo.DiskSpaceUsed = queryObj["DiskSpaceUsed"].ToString();
quotaInfo.Limit = queryObj["Limit"].ToString();
quotaInfo.QuotaVolume = queryObj["QuotaVolume"].ToString();
quotaInfo.User = queryObj["User"].ToString();

}
}

when i used the code in the windows application. it works. it gets the actual quota

inforamation for each user account on my computer.
However, i used the code in the windows service. it gets quota information only for

Asministrater. not for the other users (for example, dad, mam, and grampa).
How I can get the quota information for all the users on my computer.

Thanks for reading.

Answer 1

Hi,

Please make sure the service is run under Local System which is privileged.

Thanks

 

Answer 2

Hi, hedwig

I tested the following code in a windows service and succeeded:

(Set Service Account to LocalSystem instead of User to test)

Code Snippet

public class QuotaInformation

        {

            public String DiskSpaceUsed;

            public String Limit;

            public String QuotaVolume;

            public String User;

        }

        string str = string.Empty;

        void GetQuotaInformation()

        {

            ManagementObjectSearcher searcher = new ManagementObjectSearcher(@"\root\cimv2",

            "SELECT DiskSpaceUsed, Limit, QuotaVolume, User FROM Win32_DiskQuota");

 

            foreach (ManagementObject queryObj in searcher.Get())

            {

                str += "Disk Space Used: " + queryObj["DiskSpaceUsed"].ToString() + Environment.NewLine;

                str += "Limit: " + queryObj["Limit"].ToString() + Environment.NewLine;

                str += "QuotaVolume:" + queryObj["QuotaVolume"].ToString() + Environment.NewLine;

                str += "User: " + queryObj["User"].ToString() + Environment.NewLine;

                QuotaInformation quotaInfo = new QuotaInformation();

                quotaInfo.DiskSpaceUsed = queryObj["DiskSpaceUsed"].ToString();

                quotaInfo.Limit = queryObj["Limit"].ToString();

                quotaInfo.QuotaVolume = queryObj["QuotaVolume"].ToString();

                quotaInfo.User = queryObj["User"].ToString();

            }

        }

        protected override void OnStart(string[] args)

        {

            // TODO: Add code here to start your service.

            GetQuotaInformation();

            FileStream fs = new FileStream(@"D:\testService.txt", FileMode.OpenOrCreate, FileAccess.Write);

            StreamWriter m_streamWriter = new StreamWriter(fs);

            m_streamWriter.BaseStream.Seek(0, SeekOrigin.End);

            m_streamWriter.WriteLine("testService:         Service Started" + DateTime.Now.ToString() + "\n");

            m_streamWriter.Write(str);

            m_streamWriter.Flush();

            m_streamWriter.Close();

            fs.Close();

        }

 

Then check the testService.txt file under D: directory.

Please give a try.

Thanks