. Net (C #): WMI query of computers in the network domain

WMI supports computing a queries in the network domain. There are also multiple implementation methods in. net.

 

First of all, technically, whenever a WMI query is performed (even if you directly use the quick API method provided by managementobjectsearcher), there will be a connection process of WMI to the Information Officer's computer. The system. Management namespace has specific classes to meet such requirements. Managementpath represents an abstract WMI path, which can be a WQL query or a WMI namespace path (of course, "WQL can be added to the WMI namespace path ). Managementscope is the combination of the WMI path and connection options, which can represent a connection.

 

For example, to connect a WMI basic namespace (Root \ cimv2) named "mgen-PC" in a Windows network domain ):

// Note: Reference System. Management. dll and using system. Management;

VaR mgrpath = new managementpath (@ "\ mgen-PC \ Root \ cimv2 ");

VaR mgrscope = new managementscope (mgrpath );

// Try to connect

Mgrscope. Connect ();

// Whether the output is connected

Console. writeline (mgrscope. isconnected );

// Name of the output server (corresponding computer)

Console. writeline (mgrpath. Server );

// Output the WMI namespace

Console. writeline (mgrpath. namespacepath );

 

Output:

True

Mgen-PC

Root \ cimv2

 

With managementscope, you can connect WQL query objects to create managementobjectsearcher and finally execute WMI query:

// Note: Reference System. Management. dll and using system. Management;

VaR mgrpath = new managementpath (@ "\ mgen-PC \ Root \ cimv2 ");

VaR mgrscope = new managementscope (mgrpath );

VaR query = new objectquery ("select * From win32_process ");

 

// Use managementscope and objectquery to create managementobjectsearcher

VaR searcher = new managementobjectsearcher (mgrscope, query );

 

// Query

Foreach (managementbaseobject bobj in searcher. Get ())

Console. writeline (bobj ["name"]);

 

Of course, you can actually use the faster method provided by managementobjectsearcher. The two strings represent managementscope and objectquery respectively:

VaR searcher = new managementobjectsearcher (@ "\ mgen-PC \ Root \ cimv2", "select * From win32_process ");