Question

Anyone know why my query "select Name, ProcessID, Caption from Win32_Process where ProcessId='" + processIds[index] + "'" return

 Column 'Name' does not belong to table Win32_Process

in my program C#.

In powershell when I execute

Get-WmiObject -query "select Name, ProcessID, Caption from win32_process"

It’s works !

   String queryString = "select Name, ProcessID, Caption from Win32_Process where ProcessId='" + processIds[index] + "'";
                SelectQuery query = new SelectQuery(queryString);

                ConnectionOptions options = new ConnectionOptions();
                options.Authentication = System.Management.AuthenticationLevel.PacketPrivacy;


                ManagementScope scope = new System.Management.ManagementScope("\\root\\cimv2");
                ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
                try
                {
                    ManagementObjectCollection processes = searcher.Get();
                    DataTable result = new DataTable();
                    foreach (ManagementObject mo in processes)
                    {
                        DataRow row = result.NewRow();
                        if (mo["Name"] != null)
                            row["Name"] = mo["Name"].ToString();
                        row["ProcessId"] = Convert.ToInt32(mo["ProcessId"]);
                        if (mo["Caption"] != null)
                            row["Caption"] = mo["Caption"].ToString();
                        result.Rows.Add(row);
                    }

Thanks for your help

Answer 1

This code:

const string queryString = "SELECT Name, ProcessID, Caption FROM Win32_Process";

var scope = new ManagementScope(@"\root\cimv2");
var query = new ObjectQuery(queryString);
var searcher = new ManagementObjectSearcher(scope, query);
var objectCollection = searcher.Get();

foreach (var o in objectCollection)
{
    Console.WriteLine("{0} {1} {2}", o["Name"], o["ProcessID"], o["Caption"]);
}

…works fine for me. Exactly how is your code not working?

(You don’t appear to be doing anything with options, by the way).

Update:

It’s actually complaining because you’ve not set up the columns in your DataTable. I think that you’ve cut down your example too much. Your DataTable is called “Win32_Process”, yes? If I call mine “Albert”:

var table = new DataTable("Albert");

I get Column 'Name' does not belong to table Albert.

You need to do something like the following:

var table = new DataTable("Albert");
table.Columns.Add("Name");
table.Columns.Add("ProcessID", typeof(int));
table.Columns.Add("Caption");