What are the latest methods using C# to Retrieve WMI Data?

Posted on 2009-04-11
Last Modified: 2013-12-17
Is it me or do we live in a world were no one or nothing can be trusted?
My place of employment has locked down our network to such a degree its becoming more impossible to use the tools that allow us to do our jobs effectively. We have XP SP2 in our environment along with Vista (boo!) trickling in. I'm getting the error when using ManagementScope Class, specifically when running "scope.Connect". Error is: "Access is denied. Exception from HRESULT: (0x80070005 E_ACCESSDENIED)".
What, if any, methods or Classes are available that I can use to get WMI data from remote computers using a Console application developed in C# so I can store it in a DB?
Sincerely and thanks in advance for any help you Experts can provide.
-------------- C# Code -----------------------------

------- Keep in mind, this is still in development :) ----------------------

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Management;

using System.Data.SqlClient;


namespace CollectEPData


    class Program


        public string wkstn;

        public string Wkstn


            get { return wkstn; }

            set { wkstn = value; }



        static void Main()


            List<Program> WrkstnList = new List<Program>();


            SqlConnection conn = new SqlConnection(SettingsManager.ConnectionString2);





                string sqlStr = "SELECT Name FROM dbo.Nodes";

                SqlCommand sqlCmd = new SqlCommand(sqlStr, conn);

                sqlCmd.CommandType = System.Data.CommandType.Text;


                SqlDataReader rdr = null;

                rdr = sqlCmd.ExecuteReader();


                if (rdr.HasRows)


                    while (rdr.Read())


                        Program client = new Program();

                        client.Wkstn = rdr.GetString(0);







                if (WrkstnList.Count > 0 )



                    // For each client in the WrkstnList collection,

                    // lets connect to it and retrieve WMI data, and then

                    // store in parameters list to send and update DB.

                    foreach (Program client in WrkstnList)



                        // authentication settings needed for WMI Connection

                        // Impersonate - uses the credentials of the caller.

                        // Packet - packet level COM authentication

                        ConnectionOptions mgmtOptions = new ConnectionOptions();

                        mgmtOptions.Impersonation = ImpersonationLevel.Impersonate;

                        mgmtOptions.Authentication = AuthenticationLevel.Connect;


                        /* computer path and connection authentication

                         * options passed to th ManagementScope object

                         * named "scope" which then uses the connect

                         * method to pass in parameters and connect to

                         * the computer.


                        ManagementScope scope = new ManagementScope(@"\\" + client.Wkstn + "\\root\\cimV2", mgmtOptions);

                        scope.Connect(); <-- 0x80070005 E_ACCESSDENIED ERROR OCCURS HERE & EXITS TO CATCH ROUTINE.


                        // Management WMI Query to return the specific Hardware data 

                        // using Win32 API Calls.

                        ObjectQuery queryCS = new ObjectQuery("SELECT * FROM Win32_ComputerSystem");

                        ObjectQuery queryNA = new ObjectQuery("SELECT * FROM Win32_NetworkAdapter WHERE deviceid = 1");



                        // ManagementObjectSearcher - retrieves a collection of management objects

                        // based on the specified query.

                        ManagementObjectSearcher objCsSearcher = new ManagementObjectSearcher(scope, queryCS);

                        ManagementObjectSearcher objNaSearcher = new ManagementObjectSearcher(scope, queryNA);


                        // Invokes the specificed WMI Query and returns the resulting

                        // collection. ManagementObject - represents a WMI Instance

                        foreach (ManagementObject objQueried in objCsSearcher.Get())


                            sqlCmd.Parameters.AddWithValue("UserName", objQueried["UserName"]);

                            sqlCmd.Parameters.AddWithValue("Domain", objQueried["Domain"]);

                            sqlCmd.Parameters.AddWithValue("WakeUpType", objQueried["MacAddress"]);



                            Console.WriteLine("Win32_ComputerSystem instance");


                            Console.WriteLine("Workstation Name: {0}", objQueried["Name"]);

                            Console.WriteLine("User Name: {0}", objQueried["UserName"]);

                            Console.WriteLine("Domain: ", objQueried["Domain"]);

                            Console.WriteLine("Wakeup Type: {0}", objQueried["WakeUpType"]);



                        foreach (ManagementObject objQueried in objNaSearcher.Get())




                                Console.WriteLine("Win32_NetworkAdapterConfiguration instance");


                                Console.WriteLine("MAC Address: {0}", objQueried["MACAddress"]);










                Console.WriteLine("Database connection failed.");





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Question by:wally_davis
LVL 96

Accepted Solution

Bob Learned earned 500 total points
ID: 24128871
Since you are using impersonation, the current user doesn't have the necessary access rights.

    mgmtOptions.Impersonation = ImpersonationLevel.Impersonate;

Do you have the option for connecting with any other user credentials?

Author Closing Comment

ID: 31569558
TheLearnedOne. Thank you for responding. You got me on the right track. I needed to add the ManagementOptions "Username" and "Password" options and then also discovered I needed to pass in the Domain\Username correctly using the correct path (and not an escape sequence character, i.e. Domain\Username). The connection (i.e. scope.Connect(); method) worked perfect after that. I'm very pleased that this is now resolved. Thanks!

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