Help: C# WMI InvokeMethod always failure

Question

function code:

        public static void RenameHostname(string hostname)
        {

            ManagementClass MC= new ManagementClass("Win32_ComputerSystem");
            ManagementBaseObject inParams = MC.GetMethodParameters("rename");
            inParams["Name"] = hostname.Trim();
            ManagementBaseObject outParams = MC.InvokeMethod("rename", inParams, null);
        }

the purpose of this code is to rename computer name, but it always prompt out  "Invalid method Parameter(s)" on last line.

When I try to get "inParams" in Immediate Windows

show as below:

?inParams
{System.Management.ManagementBaseObject}
    base {System.ComponentModel.Component}: {System.Management.ManagementBaseObject}
    ClassPath: Function evaluation timed out.
    Properties: Function evaluation disabled because a previous function evaluation timed out. You must continue execution to reenable function evaluation.
    Qualifiers: Function evaluation disabled because a previous function evaluation timed out. You must continue execution to reenable function evaluation.
    SystemProperties: Function evaluation disabled because a previous function evaluation timed out. You must continue execution to reenable function evaluation.

Is there any one could help ?

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夏天

Answer 1

var mc = new ManagementClass("Win32_ComputerSystem");
var p = mc.GetMethodParameters("rename");

foreach (var v in p.Properties)
    Console.WriteLine(v.Name);

Reveals 3 parameters.

Name
Password
UserName

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Answer 2

According to the description of InvokeMethod and Win32_ComputerSystem, you can consider an alternative way: constructing a new array consisting of new computer name, password and username. Sometimes password and username can be null. So try this:

object [] p = new [] { hostname.Trim(), null, null};

ManagementBaseObject outParams = MC.InvokeMethod("Rename", p);

If it does not work, then maybe it expects a username and password?